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Diffstat (limited to 'src/libvmon')
| -rw-r--r-- | src/libvmon/LICENSE | 674 | ||||
| -rw-r--r-- | src/libvmon/bitmap.h | 15 | ||||
| -rw-r--r-- | src/libvmon/defs/_begin.def | 549 | ||||
| -rw-r--r-- | src/libvmon/defs/_end.def | 43 | ||||
| -rw-r--r-- | src/libvmon/defs/proc_files.def | 8 | ||||
| -rw-r--r-- | src/libvmon/defs/proc_io.def | 33 | ||||
| -rw-r--r-- | src/libvmon/defs/proc_stat.def | 105 | ||||
| -rw-r--r-- | src/libvmon/defs/proc_vm.def | 19 | ||||
| -rw-r--r-- | src/libvmon/defs/proc_wants.def | 14 | ||||
| -rw-r--r-- | src/libvmon/defs/sys_stat.def | 114 | ||||
| -rw-r--r-- | src/libvmon/defs/sys_vm.def | 169 | ||||
| -rw-r--r-- | src/libvmon/defs/sys_wants.def | 7 | ||||
| -rw-r--r-- | src/libvmon/vmon.c | 1634 | ||||
| -rw-r--r-- | src/libvmon/vmon.h | 308 |
14 files changed, 3692 insertions, 0 deletions
diff --git a/src/libvmon/LICENSE b/src/libvmon/LICENSE new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/src/libvmon/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. 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If not, see <http://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<http://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +<http://www.gnu.org/philosophy/why-not-lgpl.html>. diff --git a/src/libvmon/bitmap.h b/src/libvmon/bitmap.h new file mode 100644 index 0000000..eacb97d --- /dev/null +++ b/src/libvmon/bitmap.h @@ -0,0 +1,15 @@ +#ifndef _BITMAP_H +#define _BITMAP_H + +/* simple implementation of general-purpose bitmap macros taken from the comp.lang.c FAQ */ + +#include <limits.h> /* for CHAR_BIT */ + +#define BITMASK(b) (1 << ((b) % CHAR_BIT)) +#define BITSLOT(b) ((b) / CHAR_BIT) +#define BITSET(a, b) ((a)[BITSLOT(b)] |= BITMASK(b)) +#define BITCLEAR(a, b) ((a)[BITSLOT(b)] &= ~BITMASK(b)) +#define BITTEST(a, b) ((a)[BITSLOT(b)] & BITMASK(b)) +#define BITNSLOTS(nb) ((nb + CHAR_BIT - 1) / CHAR_BIT) + +#endif diff --git a/src/libvmon/defs/_begin.def b/src/libvmon/defs/_begin.def new file mode 100644 index 0000000..047fd4d --- /dev/null +++ b/src/libvmon/defs/_begin.def @@ -0,0 +1,549 @@ +/* the common types are handled in _begin.def and _end.def, individual .def files are free to create special types as well, but should + * provide macros for all the ifdef's supported here for any additions. + */ + +/* for declaring the want-specific sample data structure (used by vmon.h) */ +#ifdef VMON_DECLARE_MEMBERS +#define vmon_datum_str(_name, _sym, _label, _desc) char *_name; +#define vmon_datum_str_array(_name, _sym, _label, _desc) char **_name; +#define vmon_datum_char(_name, _sym, _label, _desc) char _name; +#define vmon_datum_char_array(_name, _sym, _label, _desc) vmon_char_array_t _name; +#define vmon_datum_int(_name, _sym, _label, _desc) int _name; +#define vmon_datum_uint(_name, _sym, _label, _desc) unsigned int _name; +#define vmon_datum_ulong(_name, _sym, _label, _desc) unsigned long _name; +#define vmon_datum_ulonglong(_name, _sym, _label, _desc) unsigned long long _name; +#define vmon_datum_long(_name, _sym, _label, _desc) long _name; +#define vmon_datum_longlong(_name, _sym, _label, _desc) long long _name; + +/* leave omissions undefined, they'll get defined as noops at the end of this file */ +#endif + + + +/* for creating the symbolic constants enumeration (used by vmon.h) */ +#ifdef VMON_ENUM_SYMBOLS +#define vmon_datum_str(_name, _sym, _label, _desc) VMON_ ## _sym, +#define vmon_datum_str_array(_name, _sym, _label, _desc) VMON_ ## _sym, +#define vmon_datum_char(_name, _sym, _label, _desc) VMON_ ## _sym, +#define vmon_datum_char_array(_name, _sym, _label, _desc) VMON_ ## _sym, +#define vmon_datum_int(_name, _sym, _label, _desc) VMON_ ## _sym, +#define vmon_datum_uint(_name, _sym, _label, _desc) VMON_ ## _sym, +#define vmon_datum_ulong(_name, _sym, _label, _desc) VMON_ ## _sym, +#define vmon_datum_ulonglong(_name, _sym, _label, _desc) VMON_ ## _sym, +#define vmon_datum_long(_name, _sym, _label, _desc) VMON_ ## _sym, +#define vmon_datum_longlong(_name, _sym, _label, _desc) VMON_ ## _sym, + +/* leave omissions undefined, they'll get defined as noops at the end of this file */ +#endif + + + +/* for creating an offset table relating symbols to struct member offsets */ +#ifdef VMON_INITIALIZE_OFFSET_TABLE +/* TODO: error out using #error if VMON_OFFSET_TABLE_STRUCT is not defined */ +/* I use the gcc builtin here because it's convenient, otherwise we either do the double macro expansion dance or put the offsetof definition here */ +#define vmon_datum_str(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), +#define vmon_datum_str_array(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), +#define vmon_datum_char(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), +#define vmon_datum_char_array(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), +#define vmon_datum_int(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), +#define vmon_datum_uint(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), +#define vmon_datum_ulong(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), +#define vmon_datum_ulonglong(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), +#define vmon_datum_long(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), +#define vmon_datum_longlong(_name, _sym, _label, _desc) __builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name), + +/* no offsets can exist for omitted members, so they're declared as nops */ +/* leave omissions undefined, they'll get defined as noops at the end of this file */ +#endif + + + +/* for creating a lookup table for the member names as strings, indexed by the enumerated symbols */ +#ifdef VMON_INITIALIZE_NAME_TABLE +#define vmon_datum_str(_name, _sym, _label, _desc) #_name , +#define vmon_datum_str_array(_name, _sym, _label, _desc) #_name , +#define vmon_datum_char(_name, _sym, _label, _desc) #_name , +#define vmon_datum_char_array(_name, _sym, _label, _desc) #_name , +#define vmon_datum_int(_name, _sym, _label, _desc) #_name , +#define vmon_datum_uint(_name, _sym, _label, _desc) #_name , +#define vmon_datum_ulong(_name, _sym, _label, _desc) #_name , +#define vmon_datum_ulonglong(_name, _sym, _label, _desc) #_name , +#define vmon_datum_long(_name, _sym, _label, _desc) #_name , +#define vmon_datum_longlong(_name, _sym, _label, _desc) #_name , + +/* leave omissions undefined, they'll get defined as noops at the end of this file */ +#endif + + + +/* for creating a lookup table for the human-readable descriptions, indexed by the enumerated symbols */ +#ifdef VMON_INITIALIZE_DESC_TABLE +#define vmon_datum_str(_name, _sym, _label, _desc) _desc , +#define vmon_datum_str_array(_name, _sym, _label, _desc) _desc , +#define vmon_datum_char(_name, _sym, _label, _desc) _desc , +#define vmon_datum_char_array(_name, _sym, _label, _desc) _desc , +#define vmon_datum_int(_name, _sym, _label, _desc) _desc , +#define vmon_datum_uint(_name, _sym, _label, _desc) _desc , +#define vmon_datum_ulong(_name, _sym, _label, _desc) _desc , +#define vmon_datum_ulonglong(_name, _sym, _label, _desc) _desc , +#define vmon_datum_long(_name, _sym, _label, _desc) _desc , +#define vmon_datum_longlong(_name, _sym, _label, _desc) _desc , + +/* leave omissions undefined, they'll get defined as noops at the end of this file */ +#endif + + + +/* these are different from the symbols, because they ignore the omissions, the definition includes all fields so we can parse the file, + * but the symbols only relate to fields we actually store in memory. */ +#ifdef VMON_ENUM_PARSER_STATES +#define vmon_datum_str(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_datum_str_array(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_datum_char(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_datum_char_array(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_datum_int(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_datum_uint(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_datum_ulong(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_datum_ulonglong(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_datum_long(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_datum_longlong(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, + +#define vmon_omit_n(_n, _sym, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_literal(_lit, _sym) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_run(_char, _sym) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_str(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_str_array(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_char(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_char_array(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_int(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_uint(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_ulong(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_ulonglong(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_long(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#define vmon_omit_longlong(_name, _sym, _label, _desc) VMON_PARSER_STATE_ ## _sym, +#endif + + +/* most the stuff we need in scope for the parser generated via VMON_IMPLEMENT_PARSER before including the appropriate .def */ +#ifdef VMON_PREPARE_PARSER + char input; + int var_isneg = 0; + int var_int = 0; + unsigned int var_uint = 0; + long var_long = 0; + long long var_longlong = 0; + unsigned long var_ulong = 0; + unsigned long long var_ulonglong = 0; + char *var_array = NULL; + int var_array_alloc_len = 0, var_array_len = 0; + +#define vmon_datum_str(_name, _sym, _label, _desc) +#define vmon_datum_str_array(_name, _sym, _label, _desc) +#define vmon_datum_char(_name, _sym, _label, _desc) +#define vmon_datum_char_array(_name, _sym, _label, _desc) +#define vmon_datum_int(_name, _sym, _label, _desc) +#define vmon_datum_uint(_name, _sym, _label, _desc) +#define vmon_datum_ulong(_name, _sym, _label, _desc) +#define vmon_datum_ulonglong(_name, _sym, _label, _desc) +#define vmon_datum_long(_name, _sym, _label, _desc) +#define vmon_datum_longlong(_name, _sym, _label, _desc) + +#define vmon_omit_n(_n, _sym, _desc) +#define vmon_omit_literal(_lit, _sym) +#define vmon_omit_run(_char, _sym) +#define vmon_omit_str(_name, _sym, _label, _desc) +#define vmon_omit_str_array(_name, _sym, _label, _desc) +#define vmon_omit_char(_name, _sym, _label, _desc) +#define vmon_omit_char_array(_name, _sym, _label, _desc) +#define vmon_omit_int(_name, _sym, _label, _desc) +#define vmon_omit_uint(_name, _sym, _label, _desc) +#define vmon_omit_ulong(_name, _sym, _label, _desc) +#define vmon_omit_ulonglong(_name, _sym, _label, _desc) +#define vmon_omit_long(_name, _sym, _label, _desc) +#define vmon_omit_longlong(_name, _sym, _label, _desc) +#endif + + +/* implements the cases for a simple switch()-based bytestream parser */ +#ifdef VMON_IMPLEMENT_PARSER +/* TODO: error out if the following aren't defined, these are utilized by the parser FSM: + * VMON_PARSER_DELIM <-- what value to treat as a delimiter for string/char arrays (sort of like IFS in bash) + * TODO: there are a bunch of variables we assume are available and named a certain way here, + * it would be preferable to be able to define those externally and inform the x-macro of their + * names etc. + */ +#define vmon_datum_str(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case VMON_PARSER_DELIM:\ + /* store accumulated string, reset tmp, and advance */\ + if(*store)->_name) {\ + if( strncmp((*store)->name, _array, var_array_len) ||\ + (*store)->name[var_array_len] != '\0') {\ + BITSET((*store)->changed, VMON_ ## _sym);\ + changes++;\ + }\ + free((*store)->name);\ + } else {\ + BITSET((*store)->changed, VMON_ ## _sym);\ + changes++;\ + }\ + (*store)->_name = strndup(var_array, var_array_len);\ + var_array_len = 0;\ + state++;\ + break;\ + default:\ + /* accumulate string */\ + var_array[var_array_len++] = input;\ + break;\ + }\ + break; + +#define vmon_datum_str_array(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + /* TODO ? */ \ + break; + +#define vmon_datum_char(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + if((*store)->_name != input) {\ + BITSET((*store)->changed, VMON_ ## _sym);\ + changes++;\ + (*store)->_name = input;\ + }\ + state++;\ + break; + +#define vmon_datum_char_array(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + /* TODO */\ + /* TODO */\ + break; + +#define vmon_datum_int(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '-':\ + /* TODO: we don't verify the '-' is leading... */\ + var_isneg = 1;\ + break;\ + case '0' ... '9':\ + var_int *= 10;\ + var_int += input - '0';\ + break;\ + default:\ + if(var_isneg) {\ + var_int = -var_int;\ + var_isneg = 0;\ + }\ + if((*store)->_name != var_int) {\ + BITSET((*store)->changed, VMON_ ## _sym);\ + changes++;\ + (*store)->_name = var_int;\ + }\ + var_int = 0;\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_datum_uint(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '0' ... '9':\ + var_uint *= 10;\ + var_uint += input - '0';\ + break;\ + default:\ + if((*store)->_name != var_uint) {\ + BITSET((*store)->changed, VMON_ ## _sym);\ + changes++;\ + (*store)->_name = var_uint;\ + }\ + var_uint = 0;\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_datum_ulong(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '0' ... '9':\ + var_ulong *= 10;\ + var_ulong += input - '0';\ + break;\ + default:\ + if((*store)->_name != var_ulong) {\ + BITSET((*store)->changed, VMON_ ## _sym);\ + changes++;\ + (*store)->_name = var_ulong;\ + }\ + var_ulong = 0;\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_datum_ulonglong(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '0' ... '9':\ + var_ulonglong *= 10;\ + var_ulonglong += input - '0';\ + break;\ + default:\ + if((*store)->_name != var_ulonglong) {\ + BITSET((*store)->changed, VMON_ ## _sym);\ + changes++;\ + (*store)->_name = var_ulonglong;\ + }\ + var_ulonglong = 0;\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_datum_long(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '-':\ + /* TODO: we dont verify the '-' is leading... */\ + var_isneg = 1;\ + break;\ + case '0' ... '9':\ + var_long *= 10;\ + var_long += input - '0';\ + break;\ + default:\ + if(var_isneg) {\ + var_long = -var_long;\ + var_isneg = 0;\ + }\ + if((*store)->_name != var_long) {\ + BITSET((*store)->changed, VMON_ ## _sym);\ + changes++;\ + (*store)->_name = var_long;\ + }\ + var_long = 0;\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_datum_longlong(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '-':\ + /* TODO: we dont verify the '-' is leading... */\ + var_isneg = 1;\ + break;\ + case '0' ... '9':\ + var_longlong *= 10;\ + var_longlong += input - '0';\ + break;\ + default:\ + if(var_isneg) {\ + var_longlong = -var_longlong;\ + var_isneg = 0;\ + }\ + if((*store)->_name != var_longlong) {\ + BITSET((*store)->changed, VMON_ ## _sym);\ + changes++;\ + (*store)->_name = var_longlong;\ + }\ + var_longlong = 0;\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +/* parse but simply skip omitted fields, advance on the delimiter */ +#define vmon_omit_n(_n, _sym, _desc) case VMON_PARSER_STATE_ ## _sym:\ + var_int++;\ + if(var_int >= _n) {\ + var_int = 0;\ + state++;\ + }\ + break; + +#define vmon_omit_literal(_lit, _sym) case VMON_PARSER_STATE_ ## _sym:\ + /* TODO make this actually match the literal, for now we skip the length. */ \ + var_int++;\ + if(var_int >= (sizeof(_lit) - 1)) {\ + var_int = 0;\ + state++;\ + }\ + break; + +#define vmon_omit_run(_char, _sym) case VMON_PARSER_STATE_ ## _sym:\ + if(input != _char) {\ + state++;\ + /* XXX: we fall-through to the next case because this byte belongs to the next state */\ + } else {\ + break;\ + } + + +#define vmon_omit_str(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + if(input == VMON_PARSER_DELIM) {\ + state++;\ + } else {\ + break;\ + } + +#define vmon_omit_str_array(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + if(input == VMON_PARSER_DELIM) {\ + state++;\ + } else {\ + break;\ + } + +#define vmon_omit_char(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + state++;\ + break; + +#define vmon_omit_char_array(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + if(input == VMON_PARSER_DELIM) {\ + state++;\ + } else {\ + break;\ + } + +#define vmon_omit_int(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '0' ... '9':\ + case '-':\ + break;\ + default:\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_omit_uint(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '0' ... '9':\ + break;\ + default:\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_omit_ulong(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '0' ... '9':\ + break;\ + default:\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_omit_ulonglong(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '0' ... '9':\ + break;\ + default:\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_omit_long(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '0' ... '9':\ + case '-':\ + break;\ + default:\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } + +#define vmon_omit_longlong(_name, _sym, _label, _desc) case VMON_PARSER_STATE_ ## _sym:\ + switch(input) {\ + case '0' ... '9':\ + case '-':\ + break;\ + default:\ + state++;\ + break;\ + }\ + if(state == VMON_PARSER_STATE_ ## _sym) {\ + /* we want to fall-through when the state advances */\ + break;\ + } +#endif + + +/* for convenience, if the omit macros are undefind define them as noops, since that's the most common pattern */ +/* XXX TODO: we may need to add some mechanism for informing the VMON_SUPPRESS_UNDEFS clause in _end.def when these + * have been automatically defined vs. explicitly defined. When automatically defined, we should undefine them regarldess + * of undef suppression. But when they are explicitly defined prior to entering here, we should honor the undef suppression. + * I'm going to leave it as-is for now until it bites me in the ass. + */ +#ifndef vmon_omit_n +# define vmon_omit_n(_n, _sym, _desc) +#endif +#ifndef vmon_omit_literal +# define vmon_omit_literal(_lit, _sym) +#endif +#ifndef vmon_omit_run +# define vmon_omit_run(_char, _sym) +#endif +#ifndef vmon_omit_str +# define vmon_omit_str(_name, _sym, _label, _desc) +#endif +#ifndef vmon_omit_str_array +# define vmon_omit_str_array(_name, _sym, _label, _desc) +#endif +#ifndef vmon_omit_char +# define vmon_omit_char(_name, _sym, _label, _desc) +#endif +#ifndef vmon_omit_char_array +# define vmon_omit_char_array(_name, _sym, _label, _desc) +#endif +#ifndef vmon_omit_int +# define vmon_omit_int(_name, _sym, _label, _desc) +#endif +#ifndef vmon_omit_uint +# define vmon_omit_uint(_name, _sym, _label, _desc) +#endif +#ifndef vmon_omit_ulong +# define vmon_omit_ulong(_name, _sym, _label, _desc) +#endif +#ifndef vmon_omit_ulonglong +# define vmon_omit_ulonglong(_name, _sym, _label, _desc) +#endif +#ifndef vmon_omit_long +# define vmon_omit_long(_name, _sym, _label, _desc) +#endif +#ifndef vmon_omit_longlong +# define vmon_omit_longlong(_name, _sym, _label, _desc) +#endif diff --git a/src/libvmon/defs/_end.def b/src/libvmon/defs/_end.def new file mode 100644 index 0000000..9243349 --- /dev/null +++ b/src/libvmon/defs/_end.def @@ -0,0 +1,43 @@ +#ifndef VMON_SUPPRESS_UNDEFS + +/* XXX TODO: we may need to detect and manage the automatic definition of the vmon_omit_* definitions */ + +#undef vmon_datum_str +#undef vmon_datum_str_array +#undef vmon_datum_char +#undef vmon_datum_char_array +#undef vmon_datum_int +#undef vmon_datum_uint +#undef vmon_datum_ulong +#undef vmon_datum_ulonglong +#undef vmon_datum_long +#undef vmon_datum_longlong +#undef vmon_omit_n +#undef vmon_omit_literal +#undef vmon_omit_run +#undef vmon_omit_str +#undef vmon_omit_str_array +#undef vmon_omit_char +#undef vmon_omit_char_array +#undef vmon_omit_int +#undef vmon_omit_uint +#undef vmon_omit_ulong +#undef vmon_omit_ulonglong +#undef vmon_omit_long +#undef vmon_omit_longlong +#undef VMON_DECLARE_MEMBERS +#undef VMON_DECLARE_CHANGEBITS +#undef VMON_ENUM_SYMBOLS +#undef VMON_ASSIGN_NAME_TABLE +#undef VMON_ASSIGN_DESC_TABLE +#undef VMON_ENUM_PARSER_STATES +#undef VMON_PREPARE_PARSER +#undef VMON_IMPLEMENT_PARSER +#undef VMON_PARSER_DELIM +#undef vmon_want + +#else + +#undef VMON_SUPPRESS_UNDEFS + +#endif diff --git a/src/libvmon/defs/proc_files.def b/src/libvmon/defs/proc_files.def new file mode 100644 index 0000000..6e3db98 --- /dev/null +++ b/src/libvmon/defs/proc_files.def @@ -0,0 +1,8 @@ +#include "_begin.def" + + /* member name, symbolic constant, human label, human description (think UI/help) */ + /* /proc/$pid/fd */ +vmon_datum_int( fdnum, FILES_FDNUM, "FdNum", "File descriptor number (historically 0-255)") +vmon_datum_char_array( object_path, FILES_OBJPATH, "ObjPath", "Object path this descriptor represents a handle for") + +#include "_end.def" diff --git a/src/libvmon/defs/proc_io.def b/src/libvmon/defs/proc_io.def new file mode 100644 index 0000000..0e1776d --- /dev/null +++ b/src/libvmon/defs/proc_io.def @@ -0,0 +1,33 @@ +#include "_begin.def" + + /* member name, symbolic constant, human label, human description (think UI/help) */ + /* /proc/$pid/io */ +vmon_omit_literal("rchar: ", PROC_IO_RCHAR_LABEL) +vmon_datum_ulonglong( rchars, PROC_IO_RCHAR, "CharsRead", "Characters read (all)") +vmon_omit_literal("\n", PROC_IO_RCHAR_NL) + +vmon_omit_literal("wchar: ", PROC_IO_WCHAR_LABEL) +vmon_datum_ulonglong( wchars, PROC_IO_WCHAR, "CharsWritten", "Characters written (all)") +vmon_omit_literal("\n", PROC_IO_WCHAR_NL) + +vmon_omit_literal("syscr: ", PROC_IO_SYSCR_LABEL) +vmon_datum_ulonglong( syscr, PROC_IO_SYSCR, "SysReads", "Read system calls") +vmon_omit_literal("\n", PROC_IO_SYSCR_NL) + +vmon_omit_literal("syscw: ", PROC_IO_SYSCW_LABEL) +vmon_datum_ulonglong( syscw, PROC_IO_SYSCW, "SysWrites", "Write system calls") +vmon_omit_literal("\n", PROC_IO_SYSCW_NL) + +vmon_omit_literal("read_bytes: ", PROC_IO_READBYTES_LABEL) +vmon_datum_ulonglong( read_bytes, PROC_IO_READBYTES, "BytesReadIO", "Bytes read from storage") +vmon_omit_literal("\n", PROC_IO_READBYTES_NL) + +vmon_omit_literal("write_bytes: ", PROC_IO_WRITEBYTES_LABEL) +vmon_datum_ulonglong( write_bytes, PROC_IO_WRITEBYTES, "BytesWrittenIO", "Bytes written to storage") +vmon_omit_literal("\n", PROC_IO_WRITEBYTES_NL) + +vmon_omit_literal("cancelled_write_bytes: ", PROC_IO_CANCELLED_WRITEBYTES_LABEL) +vmon_datum_ulonglong( cancelled_write_bytes, PROC_IO_CANCELLED_WRITEBYTES, "CancelledWriteBytes", "Bytes written but canceled before reaching storage (truncate)") +vmon_omit_literal("\n", PROC_IO_CANCELLED_WRITEBYTES_NL) + +#include "_end.def" diff --git a/src/libvmon/defs/proc_stat.def b/src/libvmon/defs/proc_stat.def new file mode 100644 index 0000000..db704e9 --- /dev/null +++ b/src/libvmon/defs/proc_stat.def @@ -0,0 +1,105 @@ +#include "_begin.def" + + /* member name, symbolic constant, human label, human description (think UI/help) */ + /* /proc/$pid/comm */ +vmon_datum_char_array( comm, PROC_STAT_COMM, "Cmd", "/proc/$pid/comm raw contents (with the \n substituted with \0)") + + /* /proc/$pid/cmdline */ +vmon_datum_char_array( cmdline, PROC_STAT_CMDLINE, "Cmdline", "/proc/$pid/cmdline raw contents") +vmon_datum_int( argc, PROC_STAT_ARGC, "Argc", "parsed cmdline count as if executed") +vmon_datum_str_array( argv, PROC_STAT_ARGV, "Argv", "parsed cmdline argv contents as if executed, pointers into cmdline") + + /* /proc/$pid/exe */ +vmon_datum_char_array( exe, PROC_STAT_EXE, "ExePath", "/proc/$pid/exe symlink target") + + /* /proc/$pid/wchan */ +vmon_datum_char_array( wchan, PROC_STAT_WCHAN, "WChan", "/proc/$pid/wchan raw contents (address resolved)") + + /* /proc/$pid/stat */ +vmon_datum_int( pid, PROC_STAT_PID, "PID", "the process id") +vmon_omit_n( (*store)->comm.len + 3, PROC_STAT_COMM_, "the filename of the executable, in parentheses, skipped") +vmon_datum_char( state, PROC_STAT_STATE, "State", "process state, one of \"RSDZTW\"") +vmon_omit_run( ' ', PROC_STAT_PPID_SP) +vmon_datum_longlong( ppid, PROC_STAT_PPID, "PPId", "parent pid") +vmon_omit_run( ' ', PROC_STAT_PGID_SP) +vmon_datum_longlong( pgrp, PROC_STAT_PGID, "PGId", "parent process group") +vmon_omit_run( ' ', PROC_STAT_SID_SP) +vmon_datum_longlong( sid, PROC_STAT_SID, "SessionId", "session id") +vmon_omit_run( ' ', PROC_STAT_TTY_NR_SP) +vmon_datum_longlong( tty_nr, PROC_STAT_TTY_NR, "Tty", "controlling terminal of the process") +vmon_omit_run( ' ', PROC_STAT_TPGID_SP) +vmon_datum_longlong( tpgid, PROC_STAT_TPGID, "CtrlPGid", "id of the foreground process group of the controlling terminal of the process") +vmon_omit_run( ' ', PROC_STAT_FLAGS_SP) +vmon_datum_ulonglong( flags, PROC_STAT_FLAGS, "Flags", "the kernel flags of the process (see PF_* in the non-uapi <linux/sched.h>)") +vmon_omit_run( ' ', PROC_STAT_MINFLT_SP) +vmon_datum_ulonglong( minflt, PROC_STAT_MINFLT, "MnrFlts", "the number of minor faults (no hitting disk)") +vmon_omit_run( ' ', PROC_STAT_CMINFLT_SP) +vmon_datum_ulonglong( cminflt, PROC_STAT_CMINFLT, "ChldMnrFlts", "number of minor faults waited-for children have made") +vmon_omit_run( ' ', PROC_STAT_MAJFLT_SP) +vmon_datum_ulonglong( majflt, PROC_STAT_MAJFLT, "MjrFlts", "the number of major faults (hit disk)") +vmon_omit_run( ' ', PROC_STAT_CMAJFLT_SP) +vmon_datum_ulonglong( cmajflt, PROC_STAT_CMAJFLT, "ChldMjrFlts", "the number of major faults waited-for children have made") +vmon_omit_run( ' ', PROC_STAT_UTIME_SP) +vmon_datum_ulonglong( utime, PROC_STAT_UTIME, "UsrCPU", "amount of time this process has spent in user mode (ticks)") +vmon_omit_run( ' ', PROC_STAT_STIME_SP) +vmon_datum_ulonglong( stime, PROC_STAT_STIME, "SysCPU", "amount of time this process has spent in kernel mode (ticks)") +vmon_omit_run( ' ', PROC_STAT_CUTIME_SP) +vmon_datum_longlong( cutime, PROC_STAT_CUTIME, "ChldUsrCPU", "amount of time the waited-for children have spent in user mode (ticks)") +vmon_omit_run( ' ', PROC_STAT_CSTIME_SP) +vmon_datum_longlong( cstime, PROC_STAT_CSTIME, "ChldSysCPU", "amount of time the waited-for children have spent in kernel mode (ticks)") +vmon_omit_run( ' ', PROC_STAT_PRIORITY_SP) +vmon_datum_longlong( priority, PROC_STAT_PRIORITY, "Priority", "priority of the process") +vmon_omit_run( ' ', PROC_STAT_NICE_SP) +vmon_datum_longlong( nice, PROC_STAT_NICE, "Nice", "nice value") +vmon_omit_run( ' ', PROC_STAT_NUM_THREADS_SP) +vmon_datum_longlong( num_threads, PROC_STAT_NUM_THREADS, "NumThreads", "number of threads") +vmon_omit_run( ' ', PROC_STAT_ALARM_SP) +vmon_omit_ulonglong( itrealvalue, PROC_STAT_ALARM, "NextAlarm", "the time in jiffies before the next SIGALRM is sent (not maintained)") +vmon_omit_run( ' ', PROC_STAT_START_SP) +vmon_datum_ulonglong( start, PROC_STAT_START, "StartTime", "start time relative to system boot in jiffies") +vmon_omit_run( ' ', PROC_STAT_VSIZE_SP) +vmon_datum_ulonglong( vsize, PROC_STAT_VSIZE, "VirtSize", "virtual memory size (bytes)") +vmon_omit_run( ' ', PROC_STAT_RSS_SP) +vmon_datum_ulonglong( rss, PROC_STAT_RSS, "ResSize", "resident set size (bytes)") +vmon_omit_run( ' ', PROC_STAT_RSSLIM_SP) +vmon_datum_ulonglong( rsslim, PROC_STAT_RSSLIM, "ResSizeLimit", "resident set size ulimit") +vmon_omit_run( ' ', PROC_STAT_STARTCODE_SP) +vmon_omit_ulonglong( startcode, PROC_STAT_STARTCODE, "CodeStart", "address above which program text can run") +vmon_omit_run( ' ', PROC_STAT_ENDCODE_SP) +vmon_omit_ulonglong( endcode, PROC_STAT_ENDCODE, "CodeEnd", "address below which program text can run") +vmon_omit_run( ' ', PROC_STAT_STARTSTACK_SP) +vmon_omit_ulonglong( startstack, PROC_STAT_STARTSTACK, "StackStart", "address of the stack start") +vmon_omit_run( ' ', PROC_STAT_ESP_SP) +vmon_omit_ulonglong( kstkesp, PROC_STAT_ESP, "StackPtr", "current stack pointer") +vmon_omit_run( ' ', PROC_STAT_EIP_SP) +vmon_omit_ulonglong( kstkeip, PROC_STAT_EIP, "InstructnPtr", "current instruction pointer") +vmon_omit_run( ' ', PROC_STAT_SIGNAL_SP) +vmon_omit_ulonglong( signal, PROC_STAT_SIGNAL, "SigsPending", "bitmap of pending signals") +vmon_omit_run( ' ', PROC_STAT_SIGBLOCKED_SP) +vmon_omit_ulonglong( blocked, PROC_STAT_SIGBLOCKED, "SigsBlocked", "bitmap of blocked signals") +vmon_omit_run( ' ', PROC_STAT_SIGIGNORED_SP) +vmon_omit_ulonglong( ignored, PROC_STAT_SIGIGNORED, "SigsIgnored", "bitmap of ignored signals") +vmon_omit_run( ' ', PROC_STAT_SIGCAUGHT_SP) +vmon_omit_ulonglong( caught, PROC_STAT_SIGCAUGHT, "SigsCaught", "bitmap of caughtsignals") +vmon_omit_run( ' ', PROC_STAT_WCHAN_ADDR_SP) +vmon_datum_ulonglong( wchan_addr, PROC_STAT_WCHAN_ADDR, "WchanAddr", "address of the process' wchan") +vmon_omit_run( ' ', PROC_STAT_SWAPPED_SP) +vmon_omit_ulonglong( nswap, PROC_STAT_SWAPPED, "NumSwapped", "number of pages swapped (not maintained)") +vmon_omit_run( ' ', PROC_STAT_CSWAPPED_SP) +vmon_omit_ulonglong( cnswap, PROC_STAT_CSWAPPED, "ChldNumSwpd", "number of cumulative pages swapped for children (not maintained)") +vmon_omit_run( ' ', PROC_STAT_EXITSIGNAL_SP) +vmon_omit_longlong( exit_signal, PROC_STAT_EXITSIGNAL, "ExitSignal", "signal to be sent to parent when we die") +vmon_omit_run( ' ', PROC_STAT_PROCESSOR_SP) +vmon_datum_longlong( processor, PROC_STAT_PROCESSOR, "LastCPU", "CPU number last executed on") +vmon_omit_run( ' ', PROC_STAT_RT_PRIORITY_SP) +vmon_omit_ulonglong( rt_priority, PROC_STAT_RT_PRIORITY, "RTPriority", "realtime priority of the process") +vmon_omit_run( ' ', PROC_STAT_POLICY_SP) +vmon_omit_ulonglong( policy, PROC_STAT_POLICY, "SchedPolicy", "scheduling policy of the process") +vmon_omit_run( ' ', PROC_STAT_DELAY_BLKIO_SP) +vmon_datum_ulonglong( delay_blkio, PROC_STAT_DELAY_BLKIO, "BlkIODelays", "aggregated block IO delays, in ticks") +vmon_omit_run( ' ', PROC_STAT_GUEST_TIME_SP) +vmon_datum_ulonglong( guest_time, PROC_STAT_GUEST_TIME, "GuestTime", "time spent running a virtual cpu for a guest OS") +vmon_omit_run( ' ', PROC_STAT_CGUEST_TIME_SP) +vmon_datum_longlong( cguest_time, PROC_STAT_CGUEST_TIME, "ChldGuestTim", "time spent running a virtual cpu for a guest OS in (waited for?) children") + +#include "_end.def" diff --git a/src/libvmon/defs/proc_vm.def b/src/libvmon/defs/proc_vm.def new file mode 100644 index 0000000..9028272 --- /dev/null +++ b/src/libvmon/defs/proc_vm.def @@ -0,0 +1,19 @@ +#include "_begin.def" + + /* member name, symbolic constant, human label, human description (think UI/help) */ + /* /proc/$pid/statm */ +vmon_datum_ulonglong( size_pages, PROC_VM_SIZE_PAGES, "Size", "Size in pages") +vmon_omit_run( ' ', PROC_VM_RESIDENT_PAGES_SP) +vmon_datum_ulonglong( resident_pages, PROC_VM_RESIDENT_PAGES, "Resident", "Resident set size in pages") +vmon_omit_run( ' ', PROC_VM_SHARED_PAGES_SP) +vmon_datum_ulonglong( shared_pages, PROC_VM_SHARED_PAGES, "Shared", "Shared size in pages") +vmon_omit_run( ' ', PROC_VM_TEXT_PAGES_SP) +vmon_datum_ulonglong( text_pages, PROC_VM_TEXT_PAGES, "Text", "Text segment size in pages") +vmon_omit_run( ' ', PROC_VM_LIB_PAGES_SP) +vmon_omit_ulonglong( lib_pages, PROC_VM_LIB_PAGES, "Library", "Library segment size (skipped, unused in 2.6)") +vmon_omit_run( ' ', PROC_VM_DATA_PAGES_SP) +vmon_datum_ulonglong( data_pages, PROC_VM_DATA_PAGES, "Data", "Data segment size in pages") +vmon_omit_run( ' ', PROC_VM_DIRTY_PAGES_SP) +vmon_omit_ulonglong( dirty_pages, PROC_VM_DIRTY_PAGES, "Dirty", "Dirtied (skipped, unused in 2.6)") + +#include "_end.def" diff --git a/src/libvmon/defs/proc_wants.def b/src/libvmon/defs/proc_wants.def new file mode 100644 index 0000000..7f02602 --- /dev/null +++ b/src/libvmon/defs/proc_wants.def @@ -0,0 +1,14 @@ +#include "_begin.def" + +/* the available per-process wants, the order here matters, put wants which affect the sampling heirarchy first */ +/* otherwise they will change the heirarchy after samples have been collected, leaving newly introduced nodes with uninitialized sample stores after return from vmon_sample() */ + +/* sym, name, internal fulfilllment function */ +vmon_want(PROC_FOLLOW_CHILDREN, proc_follow_children, proc_follow_children) +vmon_want(PROC_FOLLOW_THREADS, proc_follow_threads, proc_follow_threads) +vmon_want(PROC_FILES, proc_files, proc_sample_files) +vmon_want(PROC_STAT, proc_stat, proc_sample_stat) +vmon_want(PROC_VM, proc_vm, proc_sample_vm) +vmon_want(PROC_IO, proc_io, proc_sample_io) + +#include "_end.def" diff --git a/src/libvmon/defs/sys_stat.def b/src/libvmon/defs/sys_stat.def new file mode 100644 index 0000000..ef8b9a7 --- /dev/null +++ b/src/libvmon/defs/sys_stat.def @@ -0,0 +1,114 @@ +#include "_begin.def" + + /* member name, symbolic constant, human label, human description (think UI/help) */ + /* /proc/stat */ + +/* a cpu row, this is shown once for the total prefixed with "cpu ", then again for every cpu prefixed with "cpuN ", newlines terminate rows */ +vmon_omit_n( 5, SYS_STAT_CPU_PREFIX, "cpu line \"cpu \" prefix") +vmon_datum_ulonglong( user, SYS_STAT_CPU_USER, "UserTime", "Time spent in user mode (ticks)") +vmon_omit_run( ' ', SYS_STAT_CPU_NICE_SP) +vmon_datum_ulonglong( nice, SYS_STAT_CPU_NICE, "NiceTime", "Time spent in user mode with low priority (ticks)") +vmon_omit_run( ' ', SYS_STAT_CPU_SYS_SP) +vmon_datum_ulonglong( system, SYS_STAT_CPU_SYS, "SysTime", "Time spent in system mode (ticks)") +vmon_omit_run( ' ', SYS_STAT_CPU_IDLE_SP) +vmon_datum_ulonglong( idle, SYS_STAT_CPU_IDLE, "IdleTime", "Time spent in the idle task (ticks)") +vmon_omit_run( ' ', SYS_STAT_CPU_IOWAIT_SP) +vmon_datum_ulonglong( iowait, SYS_STAT_CPU_IOWAIT, "IOWaitTime", "Time spent runnable but waiting for IO (ticks)") +vmon_omit_run( ' ', SYS_STAT_CPU_IRQ_SP) +vmon_datum_ulonglong( irq, SYS_STAT_CPU_IRQ, "IRQTime", "Time spent in IRQ context (ticks)") +vmon_omit_run( ' ', SYS_STAT_CPU_SIRQ_SP) +vmon_datum_ulonglong( softirq, SYS_STAT_CPU_SIRQ, "SoftIRQTime", "Time spent in the softirq context (ticks)") +vmon_omit_run( ' ', SYS_STAT_CPU_STEAL_SP) +vmon_datum_ulonglong( steal, SYS_STAT_CPU_STEAL, "StealTime", "Time spent in a virtualized environment (ticks)") +vmon_omit_run( ' ', SYS_STAT_CPU_GUEST_SP) +vmon_datum_ulonglong( guest, SYS_STAT_CPU_GUEST, "GuestTime", "Time spent in a virtual cpu (ticks)") +vmon_omit_literal( "\n", SYS_STAT_CPU_NL) + + + + +#if 0 +/* here we want to embed a list of a cpus, the cpu entries need to be a composite type which needs */ + +/* TODO: the rest of /proc/stat, need to develop the macro language further to cleanly support the variable structures like N cpu rows etc... */ +vmon_heredef_list_begin( cpus, SYS_STAT_CPUS, "CPUs", "CPU time accounts for every cpu in the system") +/* we probably should somehow express which field is to be used as an index for addressing the array elements (and growing as needed) */ +vmon_omit_n( 5, SYS_STAT_PERCPU_PREFIX, "cpu line \"cpu \" prefix") +vmon_datum_ulonglong( user, SYS_STAT_PERCPU_USER, "UserTime", "Time spent in user mode (ticks)") +vmon_omit_run( ' ', SYS_STAT_PERCPU_NICE_SP) +vmon_datum_ulonglong( nice, SYS_STAT_PERCPU_NICE, "NiceTime", "Time spent in user mode with low priority (ticks)") +vmon_omit_run( ' ', SYS_STAT_PERCPU_SYS_SP) +vmon_datum_ulonglong( system, SYS_STAT_PERCPU_SYS, "SysTime", "Time spent in system mode (ticks)") +vmon_omit_run( ' ', SYS_STAT_PERCPU_IDLE_SP) +vmon_datum_ulonglong( idle, SYS_STAT_PERCPU_IDLE, "IdleTime", "Time spent in the idle task (ticks)") +vmon_omit_run( ' ', SYS_STAT_PERCPU_IOWAIT_SP) +vmon_datum_ulonglong( iowait, SYS_STAT_PERCPU_IOWAIT, "IOWaitTime", "Time spent runnable but waiting for IO (ticks)") +vmon_omit_run( ' ', SYS_STAT_PERCPU_IRQ_SP) +vmon_datum_ulonglong( irq, SYS_STAT_PERCPU_IRQ, "IRQTime", "Time spent in IRQ context (ticks)") +vmon_omit_run( ' ', SYS_STAT_PERCPU_SIRQ_SP) +vmon_datum_ulonglong( softirq, SYS_STAT_PERCPU_SIRQ, "SoftIRQTime", "Time spent in the softirq context (ticks)") +vmon_omit_run( ' ', SYS_STAT_PERCPU_STEAL_SP) +vmon_datum_ulonglong( steal, SYS_STAT_PERCPU_STEAL, "StealTime", "Time spent in a virtualized environment (ticks)") +vmon_omit_run( ' ', SYS_STAT_PERCPU_GUEST_SP) +vmon_datum_ulonglong( guest, SYS_STAT_PERCPU_GUEST, "GuestTime", "Time spent in a virtual cpu (ticks)") +vmon_omit_literal( "\n", SYS_STAT_PERCPU_NL) +vmon_heredef_list_end( cpus, SYS_STAT_CPUS) + +/* we make the interrupts array dynamic, which is kind of annoying, since in older/simple XT-PIC systems it could be simply an array of 16 elements, + and the calling code could have made assumptions about the layout. Taking this approach to accomodate modern systems also forces calling code to + be more indirect about accessing the members of this array, less assumptions can be made, such is life. I considered using a simple static array with + named directly-accessible members in the CONFIG_GENERIC_HARDIRQS case, but that would encourage creating programs dependent on that case which would + then not work unmodified on the newer (and more common, now) complicated irq routing case. :( + */ +vmon_omit_literal("intr", SYS_STAT_IRQS_PREFIX) +vmon_heredef_array_begin( irqs, SYS_STAT_IRQS, "IRQs", "Counters for all interrupts in the system") +vmon_omit_literal(" ", SYS_STAT_IRQS_SP) +vmon_datum_ulonglong( count, SYS_STAT_PERIRQ_COUNT) +vmon_heredef_array_end( irqs, SYS_STAT_IRQS) +vmon_omit_literal("\n", SYS_STAT_IRQS_NL) + +vmon_omit_literal("ctxt ", SYS_STAT_CTXT_SWITCHES_PREFIX) +vmon_datum_ulonglong( ctxt, SYS_STAT_CTXT_SWITCHES, "CXs", "Count of context switches since boot") +vmon_omit_literal("\n", SYS_STAT_CTXT_SWITCHES_NL) + +vmon_omit_literal("btime ", SYS_STAT_BOOTTIME_PREFIX) +vmon_datum_ulong( boot_time, SYS_STAT_BOOTTIME, "BootTime", "Number of seconds since epoch the system booted at") +vmon_omit_literal("\n", SYS_STAT_BOOTTIME_NL) + +vmon_omit_literal("processes ", SYS_STAT_FORKS_PREFIX) +vmon_datum_ulong( forks, SYS_STAT_FORKS, "Forks", "Number of forks since the system booted") +vmon_omit_literal("\n", SYS_STAT_FORKS_NL) + +vmon_omit_literal("procs_running ", SYS_STAT_NRUNNABLE_PREFIX) +vmon_datum_ulong( n_runnable, SYS_STAT_NRUNNABLE, "NumRunnable", "Number of processes currently runnable (may exceed number of cpus)") +vmon_omit_literal("\n", SYS_STAT_NRUNNABLE_NL) + +vmon_omit_literal("procs_blocked ", SYS_STAT_NBLOCKED_PREFIX) +vmon_datum_ulong( n_blocked, SYS_STAT_NBLOCKED, "NumBlocked", "Number of processes currently blocked") +vmon_omit_literal("\n", SYS_STAT_NBLOCKED_NL) + +vmon_omit_literal("softirq ", SYS_STAT_SIRQS_PREFIX) +vmon_datum_ulonglong( sirq_hi, SYS_STAT_SIRQ_HI, "HiSIRQ", "Number of high priority soft interrupts (HI_SOFTIRQ)") +vmon_omit_literal(" ", SYS_STAT_SIRQ_TIMER_SP) +vmon_datum_ulonglong( sirq_timer, SYS_STAT_SIRQ_TIMER, "TimerSIRQ", "Number of timer software interrupts (TIMER_SOFTIRQ)") +vmon_omit_literal(" ", SYS_STAT_SIRQ_NET_TX_SP) +vmon_datum_ulonglong( sirq_net_tx, SYS_STAT_SIRQ_NET_TX, "NetTxSIRQ", "Number of network transmit software interrupts (NET_TX_SOFTIRQ)") +vmon_omit_literal(" ", SYS_STAT_SIRQ_NET_RX_SP) +vmon_datum_ulonglong( sirq_net_rx, SYS_STAT_SIRQ_NET_RX, "NetRxSIRQ", "Number of network receive software interrupts (NET_RX_SOFTIRQ)") +vmon_omit_literal(" ", SYS_STAT_SIRQ_BLOCK_SP) +vmon_datum_ulonglong( sirq_block, SYS_STAT_SIRQ_BLOCK, "BlockSIRQ", "Number of block software interrupts (BLOCK_SOFTIRQ)") +vmon_omit_literal(" ", SYS_STAT_SIRQ_IOPOLL_SP) +vmon_datum_ulonglong( sirq_iopoll, SYS_STAT_SIRQ_IOPOLL, "IOPollSIRQ", "Number of block IO poll software interrupts (BLOCK_IOPOLL_SOFTIRQ)") +vmon_omit_literal(" ", SYS_STAT_SIRQ_TASKLET_SP) +vmon_datum_ulonglong( sirq_tasklet, SYS_STAT_SIRQ_TASKLET, "TaskletSIRQ", "Number of tasklet software interrupts (TASKLET SOFTIRQ)") +vmon_omit_literal(" ", SYS_STAT_SIRQ_HRTIMER_SP) +vmon_datum_ulonglong( sirq_hrtimer, SYS_STAT_SIRQ_HRTIMER, "HRTimerSIRQ", "Number of hrtimer software interrupts (HRTIMER_SOFTIRQ)") +vmon_omit_literal(" ", SYS_STAT_SIRQ_RCU_SP) +vmon_datum_ulonglong( sirq_rcu, SYS_STAT_SIRQ_RCU, "RCUSIRQ", "Number of RCU software interrupts (RCU_SOFTIRQ)") +vmon_omit_literal("\n", SYS_STAT_SIRQS_NL) + + +#endif + + +#include "_end.def" diff --git a/src/libvmon/defs/sys_vm.def b/src/libvmon/defs/sys_vm.def new file mode 100644 index 0000000..33b4d3f --- /dev/null +++ b/src/libvmon/defs/sys_vm.def @@ -0,0 +1,169 @@ +#include "_begin.def" + + + /* member name, symbolic constant, human label, human description (think UI/help) */ + /* /proc/meminfo */ +vmon_omit_literal("MemTotal:", SYS_VM_TOTAL_KB_LABEL) +vmon_omit_run(' ', SYS_VM_TOTAL_KB_WHITESPACE) +vmon_datum_ulong( total_kb, SYS_VM_TOTAL_KB, "Total", "Total memory in system") +vmon_omit_literal(" kB\n", SYS_VM_TOTAL_KB_UNIT_NL) +vmon_omit_literal("MemFree:", SYS_VM_FREE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_FREE_KB_WHITESPACE) +vmon_datum_ulong( free_kb, SYS_VM_FREE_KB, "Free", "Free memory in system") +vmon_omit_literal(" kB\n", SYS_VM_FREE_KB_UNIT_NL) +vmon_omit_literal("Buffers:", SYS_VM_BUFFERS_KB_LABEL) +vmon_omit_run(' ', SYS_VM_BUFFERS_KB_WHITESPACE) +vmon_datum_ulong( buffers_kb, SYS_VM_BUFFERS_KB, "Buffers", "Memory allocated to buffers") +vmon_omit_literal(" kB\n", SYS_VM_BUFFERS_KB_UNIT_NL) +vmon_omit_literal("Cached:", SYS_VM_CACHED_KB_LABEL) +vmon_omit_run(' ', SYS_VM_CACHED_KB_WHITESPACE) +vmon_datum_ulong( cached_kb, SYS_VM_CACHED_KB, "Cached", "Memory allocated to caches") +vmon_omit_literal(" kB\n", SYS_VM_CACHED_KB_UNIT_NL) +vmon_omit_literal("SwapCached:", SYS_VM_SWAPCACHED_KB_LABEL) +vmon_omit_run(' ', SYS_VM_SWAPCACHED_KB_WHITESPACE) +vmon_datum_ulong( swapcached_kb, SYS_VM_SWAPCACHED_KB, "SwapCached", "Memory allocated to swap caches") +vmon_omit_literal(" kB\n", SYS_VM_SWAPCACHED_KB_UNIT_NL) +vmon_omit_literal("Active:", SYS_VM_ACTIVE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_ACTIVE_KB_WHITESPACE) +vmon_datum_ulong( active_kb, SYS_VM_ACTIVE_KB, "Active", "Active pages") +vmon_omit_literal(" kB\n", SYS_VM_ACTIVE_KB_UNIT_NL) +vmon_omit_literal("Inactive:", SYS_VM_INACTIVE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_INACTIVE_KB_WHITESPACE) +vmon_datum_ulong( inactive_kb, SYS_VM_INACTIVE_KB, "Inactive", "Inactive pages") +vmon_omit_literal(" kB\n", SYS_VM_INACTIVE_KB_UNIT_NL) +vmon_omit_literal("Active(anon):", SYS_VM_ANON_ACTIVE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_ANON_ACTIVE_KB_WHITESPACE) +vmon_datum_ulong( anon_active_kb, SYS_VM_ANON_ACTIVE_KB, "AnonActive", "Active anonymous pages") +vmon_omit_literal(" kB\n", SYS_VM_ANON_ACTIVE_KB_UNIT_NL) +vmon_omit_literal("Inactive(anon):", SYS_VM_ANON_INACTIVE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_ANON_INACTIVE_KB_WHITESPACE) +vmon_datum_ulong( anon_inactive_kb, SYS_VM_ANON_INACTIVE_KB, "AnonInactive", "Inactive anonymous pages") +vmon_omit_literal(" kB\n", SYS_VM_ANON_INACTIVE_KB_UNIT_NL) +vmon_omit_literal("Active(file):", SYS_VM_FILE_ACTIVE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_FILE_ACTIVE_KB_WHITESPACE) +vmon_datum_ulong( file_active_kb, SYS_VM_FILE_ACTIVE_KB, "FileActive", "Active file pages") +vmon_omit_literal(" kB\n", SYS_VM_FILE_ACTIVE_KB_UNIT_NL) +vmon_omit_literal("Inactive(file):", SYS_VM_FILE_INACTIVE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_FILE_INACTIVE_KB_WHITESPACE) +vmon_datum_ulong( file_inactive_kb, SYS_VM_FILE_INACTIVE_KB, "FileInactive", "Inactive file pages") +vmon_omit_literal(" kB\n", SYS_VM_FILE_INACTIVE_KB_UNIT_NL) +vmon_omit_literal("Unevictable:", SYS_VM_UNEVICTABLE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_UNEVICTABLE_KB_WHITESPACE) +vmon_datum_ulong( unevictable_kb, SYS_VM_UNEVICTABLE_KB, "Unevictable", "Unevictable pages") +vmon_omit_literal(" kB\n", SYS_VM_UNEVICTABLE_KB_UNIT_NL) +vmon_omit_literal("Mlocked:", SYS_VM_MLOCKED_KB_LABEL) +vmon_omit_run(' ', SYS_VM_MLOCKED_KB_WHITESPACE) +vmon_datum_ulong( mlocked_kb, SYS_VM_MLOCKED_KB, "Mlocked", "Locked pages") +vmon_omit_literal(" kB\n", SYS_VM_MLOCKED_KB_UNIT_NL) +vmon_omit_literal("SwapTotal:", SYS_VM_SWAP_TOTAL_KB_LABEL) +vmon_omit_run(' ', SYS_VM_SWAP_TOTAL_KB_WHITESPACE) +vmon_datum_ulong( swap_total_kb, SYS_VM_SWAP_TOTAL_KB, "SwapTotal", "Total swap") +vmon_omit_literal(" kB\n", SYS_VM_SWAP_TOTAL_KB_UNIT_NL) +vmon_omit_literal("SwapFree:", SYS_VM_SWAP_FREE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_SWAP_FREE_KB_WHITESPACE) +vmon_datum_ulong( swap_free_kb, SYS_VM_SWAP_FREE_KB, "SwapFree", "Free swap") +vmon_omit_literal(" kB\n", SYS_VM_SWAP_FREE_KB_UNIT_NL) +vmon_omit_literal("Dirty:", SYS_VM_DIRTY_KB_LABEL) +vmon_omit_run(' ', SYS_VM_DIRTY_KB_WHITESPACE) +vmon_datum_ulong( dirty_kb, SYS_VM_DIRTY_KB, "Dirty", "Dirty pages") +vmon_omit_literal(" kB\n", SYS_VM_DIRTY_KB_UNIT_NL) +vmon_omit_literal("Writeback:", SYS_VM_WRITEBACK_KB_LABEL) +vmon_omit_run(' ', SYS_VM_WRITEBACK_KB_WHITESPACE) +vmon_datum_ulong( writeback_kb, SYS_VM_WRITEBACK_KB, "Writeback", "Dirtied pages in the process of being written back") +vmon_omit_literal(" kB\n", SYS_VM_WRITEBACK_KB_UNIT_NL) +vmon_omit_literal("AnonPages:", SYS_VM_ANONPAGES_KB_LABEL) +vmon_omit_run(' ', SYS_VM_ANONPAGES_KB_WHITESPACE) +vmon_datum_ulong( anonpages_kb, SYS_VM_ANONPAGES_KB, "AnonPages", "Anonymous pages") +vmon_omit_literal(" kB\n", SYS_VM_ANONPAGES_KB_UNIT_NL) +vmon_omit_literal("Mapped:", SYS_VM_MAPPED_KB_LABEL) +vmon_omit_run(' ', SYS_VM_MAPPED_KB_WHITESPACE) +vmon_datum_ulong( mapped_kb, SYS_VM_MAPPED_KB, "Mapped", "Mapped pages") +vmon_omit_literal(" kB\n", SYS_VM_MAPPED_KB_UNIT_NL) +vmon_omit_literal("Shmem:", SYS_VM_SHMEM_KB_LABEL) +vmon_omit_run(' ', SYS_VM_SHMEM_KB_WHITESPACE) +vmon_datum_ulong( shmem_kb, SYS_VM_SHMEM_KB, "Shmem", "SysV IPC shmem") +vmon_omit_literal(" kB\n", SYS_VM_SHMEM_KB_UNIT_NL) +vmon_omit_literal("Slab:", SYS_VM_SLAB_KB_LABEL) +vmon_omit_run(' ', SYS_VM_SLAB_KB_WHITESPACE) +vmon_datum_ulong( slab_kb, SYS_VM_SLAB_KB, "Slab", "Slab memory") +vmon_omit_literal(" kB\n", SYS_VM_SLAB_KB_UNIT_NL) +vmon_omit_literal("SReclaimable:", SYS_VM_SRECLAIMABLE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_SRECLAIMABLE_KB_WHITESPACE) +vmon_datum_ulong( sreclaimable_kb, SYS_VM_SRECLAIMABLE_KB, "SReclaimable", "Slab (reclaimable) memory") +vmon_omit_literal(" kB\n", SYS_VM_SRECLAIMABLE_KB_UNIT_NL) +vmon_omit_literal("SUnreclaim:", SYS_VM_SUNRECLAIMABLE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_SUNRECLAIMABLE_KB_WHITESPACE) +vmon_datum_ulong( sunreclaimable_kb, SYS_VM_SUNRECLAIMABLE_KB, "SUnreclaim", "Slab (unreclaimable) memory") +vmon_omit_literal(" kB\n", SYS_VM_SUNRECLAIMABLE_KB_UNIT_NL) +vmon_omit_literal("KernelStack:", SYS_VM_KERNELSTACK_KB_LABEL) +vmon_omit_run(' ', SYS_VM_KERNELSTACK_KB_WHITESPACE) +vmon_datum_ulong( kernelstack_kb, SYS_VM_KERNELSTACK_KB, "KernelStack", "Kernel stack") +vmon_omit_literal(" kB\n", SYS_VM_KERNELSTACK_KB_UNIT_NL) +vmon_omit_literal("PageTables:", SYS_VM_PAGETABLES_KB_LABEL) +vmon_omit_run(' ', SYS_VM_PAGETABLES_KB_WHITESPACE) +vmon_datum_ulong( pagetables_kb, SYS_VM_PAGETABLES_KB, "PageTables", "Page tables") +vmon_omit_literal(" kB\n", SYS_VM_PAGETABLES_KB_UNIT_NL) +vmon_omit_literal("NFS_Unstable:", SYS_VM_NFS_UNSTABLE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_NFS_UNSTABLE_KB_WHITESPACE) +vmon_datum_ulong( nfs_unstable_kb, SYS_VM_NFS_UNSTABLE_KB, "NFS_Unstable", "NFS unstable") +vmon_omit_literal(" kB\n", SYS_VM_NFS_UNSTABLE_KB_UNIT_NL) +vmon_omit_literal("Bounce:", SYS_VM_BOUNCE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_BOUNCE_KB_WHITESPACE) +vmon_datum_ulong( bounce_kb, SYS_VM_BOUNCE_KB, "Bounce", "Bounce") +vmon_omit_literal(" kB\n", SYS_VM_BOUNCE_KB_UNIT_NL) +vmon_omit_literal("WritebackTmp:", SYS_VM_WRITEBACKTMP_KB_LABEL) +vmon_omit_run(' ', SYS_VM_WRITEBACKTMP_KB_WHITESPACE) +vmon_datum_ulong( writebacktmp_kb, SYS_VM_WRITEBACKTMP_KB, "WritebackTmp", "Writeback temp") +vmon_omit_literal(" kB\n", SYS_VM_WRITEBACKTMP_KB_UNIT_NL) +vmon_omit_literal("CommitLimit:", SYS_VM_COMMITLIMIT_KB_LABEL) +vmon_omit_run(' ', SYS_VM_COMMITLIMIT_KB_WHITESPACE) +vmon_datum_ulong( commitlimit_kb, SYS_VM_COMMITLIMIT_KB, "CommitLimit", "Commit limit") +vmon_omit_literal(" kB\n", SYS_VM_COMMITLIMIT_KB_UNIT_NL) +vmon_omit_literal("Committed_AS:", SYS_VM_COMMITTED_AS_KB_LABEL) +vmon_omit_run(' ', SYS_VM_COMMITTED_AS_KB_WHITESPACE) +vmon_datum_ulong( commited_as_kb, SYS_VM_COMMITTED_AS_KB, "Commited_AS", "Commited address space? TODO ") +vmon_omit_literal(" kB\n", SYS_VM_COMMITTED_AS_KB_UNIT_NL) +vmon_omit_literal("VmallocTotal:", SYS_VM_VMALLOC_TOTAL_KB_LABEL) +vmon_omit_run(' ', SYS_VM_VMALLOC_KB_WHITESPACE) +vmon_datum_ulong( vmalloctotal_kb, SYS_VM_VMALLOC_TOTAL_KB, "VmallocTotal", "Vmalloc total") +vmon_omit_literal(" kB\n", SYS_VM_VMALLOC_TOTAL_KB_UNIT_NL) +vmon_omit_literal("VmallocUsed:", SYS_VM_VMALLOC_USED_KB_LABEL) +vmon_omit_run(' ', SYS_VM_VMALLOC_USED_KB_WHITESPACE) +vmon_datum_ulong( vmallocused_kb, SYS_VM_VMALLOC_USED_KB, "VmallocUsed", "Vmalloc used") +vmon_omit_literal(" kB\n", SYS_VM_VMALLOC_USED_KB_UNIT_NL) +vmon_omit_literal("VmallocChunk:", SYS_VM_VMALLOC_CHUNK_KB_LABEL) +vmon_omit_run(' ', SYS_VM_VMALLOC_CHUNK_KB_WHITESPACE) +vmon_datum_ulong( vmallocchunk_kb, SYS_VM_VMALLOC_CHUNK_KB, "VmallocChunk", "Vmalloc chunk") +vmon_omit_literal(" kB\n", SYS_VM_VMALLOC_CHUNK_KB_UNIT_NL) +vmon_omit_literal("HugePages_Total:", SYS_VM_HUGEPAGES_TOTAL_LABEL) +vmon_omit_run(' ', SYS_VM_HUGEPAGES_TOTAL_WHITESPACE) +vmon_datum_ulong( hugepages_total, SYS_VM_HUGEPAGES_TOTAL, "HugePages_Total", "HugePages total") +vmon_omit_literal("\n", SYS_VM_HUGEPAGES_TOTAL_NL) +vmon_omit_literal("HugePages_Free:", SYS_VM_HUGEPAGES_FREE_LABEL) +vmon_omit_run(' ', SYS_VM_HUGEPAGES_FREE_WHITESPACE) +vmon_datum_ulong( hugepages_free, SYS_VM_HUGEPAGES_FREE, "HugePages_Free", "HugePages free") +vmon_omit_literal("\n", SYS_VM_HUGEPAGES_FREE_NL) +vmon_omit_literal("HugePages_Rsvd:", SYS_VM_HUGEPAGES_RESERVED_LABEL) +vmon_omit_run(' ', SYS_VM_HUGEPAGES_RESERVED_WHITESPACE) +vmon_datum_ulong( hugepages_reserved, SYS_VM_HUGEPAGES_RESERVED, "HugePages_Rsvd", "HugePages reserved") +vmon_omit_literal("\n", SYS_VM_HUGEPAGES_RESERVED_UNIT_NL) +vmon_omit_literal("HugePages_Surp:", SYS_VM_HUGEPAGES_SURPLUS_LABEL) +vmon_omit_run(' ', SYS_VM_HUGEPAGES_SURPLUS_WHITESPACE) +vmon_datum_ulong( hugepages_surplus, SYS_VM_HUGEPAGES_SURPLUS, "HugePages_Surp", "HugePages surplus") +vmon_omit_literal("\n", SYS_VM_HUGEPAGES_SURPLUS_NL) +vmon_omit_literal("Hugepagesize:", SYS_VM_HUGEPAGE_SIZE_KB_LABEL) +vmon_omit_run(' ', SYS_VM_HUGEPAGE_SIZE_KB_WHITESPACE) +vmon_datum_ulong( hugepage_size_kb, SYS_VM_HUGEPAGE_SIZE_KB, "HugePage_Size", "HugePage page size") +vmon_omit_literal(" kB\n", SYS_VM_HUGEPAGE_SIZE_KB_UNIT_NL) +vmon_omit_literal("DirectMap4k:", SYS_VM_DIRECTMAP_4K_KB_LABEL) +vmon_omit_run(' ', SYS_VM_DIRECTMAP_4K_KB_WHITESPACE) +vmon_datum_ulong( directmap4k_kb, SYS_VM_DIRECTMAP_4K_KB, "DirectMap4k", "DirectMap 4K") +vmon_omit_literal(" kB\n", SYS_VM_DIRECTMAP_4K_KB_UNIT_NL) +vmon_omit_literal("DirectMap4M:", SYS_VM_DIRECTMAP_4M_KB_LABEL) +vmon_omit_run(' ', SYS_VM_DIRECTMAP_4M_KB_WHITESPACE) +vmon_datum_ulong( directmap2m_kb, SYS_VM_DIRECTMAP_4M_KB, "DirectMap4M", "DirectMap 4M") +vmon_omit_literal(" kB\n", SYS_VM_DIRECTMAP_4M_KB_UNIT_NL) + +/* TODO: /proc/vmstat */ + +#include "_end.def" diff --git a/src/libvmon/defs/sys_wants.def b/src/libvmon/defs/sys_wants.def new file mode 100644 index 0000000..750d7bb --- /dev/null +++ b/src/libvmon/defs/sys_wants.def @@ -0,0 +1,7 @@ +#include "_begin.def" + +/* the available sys-wide wants */ +vmon_want(SYS_STAT, sys_stat, sys_sample_stat) +vmon_want(SYS_VM, sys_vm, sys_sample_vm) + +#include "_end.def" diff --git a/src/libvmon/vmon.c b/src/libvmon/vmon.c new file mode 100644 index 0000000..7d2b2a0 --- /dev/null +++ b/src/libvmon/vmon.c @@ -0,0 +1,1634 @@ +/* + * libvmon - a lightweight linux system/process monitoring library, + * intended for linking directly into gpl programs. + * + * This has been written specifically for use in vwm, my window manager, + * but includes some facilities for other uses. + * + * Copyright (c) 2012-2014 Vito Caputo - <vcaputo@gnugeneration.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdlib.h> +#include <unistd.h> +#include <stdio.h> +#include <stdarg.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <string.h> +#include <inttypes.h> +#include <dirent.h> +#include <errno.h> +#include "list.h" + +#include "vmon.h" + +#define VMON_INTERNAL_PROC_IS_THREAD (1L << 31) /* used to communicate to vmon_proc_monitor() that the pid is a tid */ + +/* valid return values for the sampler functions, these are private to the library */ +typedef enum _sample_ret_t { + SAMPLE_CHANGED, /* this sampler invocation has changes */ + SAMPLE_UNCHANGED, /* this sampler invocation has no changes */ + SAMPLE_ERROR, /* this sampler invocation encountered errors (XXX it may be interesting to support indicating changing & errors) */ + DTOR_FREE, /* this dtor(sampler) invocation wants the caller to free the store */ + DTOR_NOFREE /* this dtor(sampler) invocation does not want the caller to perform a free on the store */ +} sample_ret_t; + + +/* some private convenience functions */ +static void try_free(void **ptr) +{ + if((*ptr)) { + free((*ptr)); + (*ptr) = NULL; + } +} + + +static void try_close(int *fd) +{ + if((*fd) != -1) { + close((*fd)); + (*fd) = -1; + } +} + + +static void try_closedir(DIR **dir) +{ + if((*dir)) { + closedir((*dir)); + (*dir) = NULL; + } +} + + +/* these have been wrapped to suppress syscall overhead when we have a bad file descriptor without cluttering the samplers with checks */ +static off_t try_lseek(int fd, off_t offset, int whence) +{ + if(fd != -1) { + return lseek(fd, offset, whence); + } else { + errno = EBADF; + return fd; + } +} + + +static ssize_t try_read(int fd, void *buf, size_t count) +{ + if(fd != -1) { + return read(fd, buf, count); + } else { + errno = EBADF; + return fd; + } +} + + +/* this does a copy from src to dest + * sets the bit specified by changed_pos in the bitmap *changed if what was copied to src was different from what was already there */ +static void memcmpcpy(void *dest, const void *src, size_t n, char *changed, int changed_pos) +{ + size_t i = 0; + + /* if the changed bit is set on entry we don't execute the comparison-copy */ + if(!BITTEST(changed, changed_pos)) { + /* a simple slow compare and copy loop, break out if we've found a change */ + /* XXX TODO: an obvious optimization would be to compare and copy words at a time... */ + for(; i < n; i++) { + if(((char *)dest)[i] != ((char *)src)[i]) { + BITSET(changed, changed_pos); + break; + } + ((char *)dest)[i] = ((char *)src)[i]; + } + } + + /* memcpy whatever remains */ + if(n - i) { + memcpy(&((char *)dest)[i], &((char *)src)[i], n - i); + } +} + + +typedef enum _vmon_load_flags_t { + LOAD_FLAGS_NONE = 0, + LOAD_FLAGS_NOTRUNCATE = 1L +} vmon_load_flags_t; + +/* we enlarge *alloc if necessary, but never shrink it. changed[changed_pos] bit is set if a difference is detected, supply LOAD_FLAGS_NOTRUNCATE if we don't want empty contents to truncate last-known data */ +static char * load_contents_fd(vmon_t *vmon, vmon_char_array_t *array, int fd, vmon_load_flags_t flags, char *changed, int changed_pos) +{ + int total = 0, len, alloc_len = array->alloc_len; + char *alloc = array->array, *tmp; + + while((len = read(fd, vmon->buf, sizeof(vmon->buf))) > 0) { + if(total + len > alloc_len) { + /* realloc to accomodate the new total */ + tmp = realloc(alloc, total + len); + if(!tmp) { + return NULL; + } + + alloc_len = total + len; + alloc = tmp; + } + + memcmpcpy(&alloc[total], vmon->buf, len, changed, changed_pos); + + total += len; + } + + array->array = alloc; + array->alloc_len = alloc_len; + + /* if we read something or didn't encounter an error, store the new total */ + if(total || (len == 0 && !(flags & LOAD_FLAGS_NOTRUNCATE))) { + /* if the new length differs ensure the changed bit is set */ + if(array->len != total) { + BITSET(changed, changed_pos); + } + + array->len = total; + } + + return alloc; +} + + +/* convenience function for opening a path using a format string, path is temporarily assembled in vmon->buf */ +static int openf(vmon_t *vmon, int flags, DIR *dir, char *fmt, ...) +{ + int fd; + va_list va_arg; + + va_start(va_arg, fmt); + vsnprintf(vmon->buf, sizeof(vmon->buf), fmt, va_arg); /* XXX accepting the possibility of truncating the path */ + va_end(va_arg); + + fd = openat(dirfd(dir), vmon->buf, flags); + + return fd; +} + + +/* convenience function for opening a directory using a format string, path is temporarily assembled in vmon->buf */ +static DIR * opendirf(vmon_t *vmon, DIR *dir, char *fmt, ...) +{ + int fd; + va_list va_arg; + + va_start(va_arg, fmt); + vsnprintf(vmon->buf, sizeof(vmon->buf), fmt, va_arg); /* XXX accepting the possibility of truncating the path */ + va_end(va_arg); + + fd = openat(dirfd(dir), vmon->buf, O_RDONLY); + if(fd == -1) { + return NULL; + } + + return fdopendir(fd); +} + + +/* enlarge an array by the specified amount */ +static int grow_array(vmon_char_array_t *array, int amount) +{ + char *tmp; + + tmp = realloc(array->array, array->alloc_len + amount); + if(!tmp) { + return 0; + } + + array->alloc_len += amount; + array->array = tmp; + + return 1; +} + + +/* load the contents of a symlink, dir is not optional */ +#define READLINKF_GROWINIT 10 +#define READLINKF_GROWBY 2 +static char * readlinkf(vmon_t *vmon, vmon_char_array_t *array, DIR *dir, char *fmt, ...) +{ + va_list va_arg; + int len; + + va_start(va_arg, fmt); + vsnprintf(vmon->buf, sizeof(vmon->buf), fmt, va_arg); + va_end(va_arg); + + if(!array->array && !grow_array(array, READLINKF_GROWINIT)) { + goto _fail; + } + + do { + len = readlinkat(dirfd(dir), vmon->buf, array->array, (array->alloc_len - 1)); + } while(len != -1 && len == (array->alloc_len - 1) && (len = grow_array(array, READLINKF_GROWBY))); + + if(len <= 0) { + goto _fail; + } + + array->len = len; + array->array[array->len] = '\0'; + + return array->array; + +_fail: + return NULL; +} + + +/* here starts private per-process samplers and other things like following children implementation etc. */ + +/* sample stat process stats */ +typedef enum _vmon_proc_stat_fsm_t { +#define VMON_ENUM_PARSER_STATES +#include "defs/proc_stat.def" +} vmon_proc_stat_fsm_t; + +static sample_ret_t proc_sample_stat(vmon_t *vmon, vmon_proc_t *proc, vmon_proc_stat_t **store) +{ + int changes = 0; + int i, len; + char *arg; + int argn, prev_argc; + vmon_proc_stat_fsm_t state = VMON_PARSER_STATE_PROC_STAT_PID; +#define VMON_PREPARE_PARSER +#include "defs/proc_stat.def" + + if(!proc) { /* dtor */ + try_close(&(*store)->comm_fd); + try_free((void **)&(*store)->comm); + try_close(&(*store)->cmdline_fd); + try_free((void **)&(*store)->cmdline); + try_close(&(*store)->wchan_fd); + try_close(&(*store)->stat_fd); + try_free((void **)&(*store)->exe); + + return DTOR_FREE; + } + +_retry: + if(!(*store)) { /* ctor */ + + *store = calloc(1, sizeof(vmon_proc_stat_t)); + + if(proc->is_thread) { + (*store)->comm_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/task/%i/comm", proc->pid, proc->pid); + (*store)->cmdline_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/task/%i/cmdline", proc->pid, proc->pid); + (*store)->wchan_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/task/%i/wchan", proc->pid, proc->pid); + (*store)->stat_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/task/%i/stat", proc->pid, proc->pid); + } else { + (*store)->comm_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/comm", proc->pid); + (*store)->cmdline_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/cmdline", proc->pid); + (*store)->wchan_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/wchan", proc->pid); + (*store)->stat_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/stat", proc->pid); + } + + /* initially everything is considered changed */ + memset((*store)->changed, 0xff, sizeof((*store)->changed)); + } else { + try_lseek((*store)->comm_fd, 0, SEEK_SET); + try_lseek((*store)->cmdline_fd, 0, SEEK_SET); + try_lseek((*store)->wchan_fd, 0, SEEK_SET); + try_lseek((*store)->stat_fd, 0, SEEK_SET); + + /* clear the entire changed bitmap */ + memset((*store)->changed, 0, sizeof((*store)->changed)); + } + + /* XXX TODO: integrate load_contents_fd() calls into changes++ maintenance */ + /* /proc/$pid/comm */ + load_contents_fd(vmon, &(*store)->comm, (*store)->comm_fd, LOAD_FLAGS_NOTRUNCATE, (*store)->changed, VMON_PROC_STAT_COMM); + + /* /proc/$pid/cmdline */ + load_contents_fd(vmon, &(*store)->cmdline, (*store)->cmdline_fd, LOAD_FLAGS_NOTRUNCATE, (*store)->changed, VMON_PROC_STAT_CMDLINE); + for(prev_argc = (*store)->argc, (*store)->argc = 0, i = 0; i < (*store)->cmdline.len; i++) { + if(!(*store)->cmdline.array[i]) { + (*store)->argc++; + } + } + + /* if the cmdline has changed, allocate argv array and store ptrs to the fields within it */ + if(BITTEST((*store)->changed, VMON_PROC_STAT_CMDLINE)) { + if(prev_argc != (*store)->argc) { + try_free((void **)&(*store)->argv); /* XXX could realloc */ + (*store)->argv = malloc((*store)->argc * sizeof(char *)); + } + + for(argn = 0, arg = (*store)->cmdline.array, i = 0; i < (*store)->cmdline.len; i++) { + if(!(*store)->cmdline.array[i]) { + (*store)->argv[argn++] = arg; + arg = &(*store)->cmdline.array[i + 1]; + } + } + } + + /* /proc/$pid/wchan */ + load_contents_fd(vmon, &(*store)->wchan, (*store)->wchan_fd, LOAD_FLAGS_NOTRUNCATE, (*store)->changed, VMON_PROC_STAT_WCHAN); + + /* /proc/$pid/exe */ + if((*store)->cmdline.len) { /* kernel threads have no cmdline, and always fail readlinkf() on exe, skip readlinking the exe for them using this heuristic */ + readlinkf(vmon, &(*store)->exe, vmon->proc_dir, "%i/exe", proc->pid); + } + + /* XXX TODO: there's a race between discovering comm_len from /proc/$pid/comm and applying it in the parsing of /proc/$pid/stat, detect the race + * scenario and retry the sample when detected by goto _retry */ + + /* read in stat and parse it assigning the stat members accordingly */ + while((len = try_read((*store)->stat_fd, vmon->buf, sizeof(vmon->buf))) > 0) { + for(i = 0; i < len; i++) { + /* parse the fields from the file, stepping through... */ + input = vmon->buf[i]; + switch(state) { +#define VMON_PARSER_DELIM ' ' /* TODO XXX eliminate the need for this, I want the .def's to include all the data format knowledge */ +#define VMON_IMPLEMENT_PARSER +#include "defs/proc_stat.def" + default: + /* we're finished parsing once we've fallen off the end of the symbols */ + break; + } + } + } + + return changes ? SAMPLE_CHANGED : SAMPLE_UNCHANGED; +} + + +/* implements the children following */ +static int proc_follow_children(vmon_t *vmon, vmon_proc_t *proc, vmon_proc_follow_children_t **store) +{ + int changes = 0; + int len, i, child_pid = 0, found; + vmon_proc_t *tmp, *_tmp; + list_head_t *cur, *start; + + if(!proc) { /* dtor */ + try_close(&(*store)->children_fd); + + return DTOR_FREE; + } + + if(proc->is_thread) { /* don't follow children of threads */ + return SAMPLE_UNCHANGED; + } + + if(!(*store)) { /* implicit ctor on first sample */ + *store = calloc(1, sizeof(vmon_proc_follow_children_t)); + + (*store)->children_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/task/%i/children", proc->pid, proc->pid); + } else { + try_lseek((*store)->children_fd, 0, SEEK_SET); + } + + /* unmonitor stale children on entry, this concludes the two-phase removal of a process */ + list_for_each_entry_safe(tmp, _tmp, &proc->children, siblings) { + if(tmp->is_stale) { + vmon_proc_unmonitor(vmon, tmp, NULL, NULL); + } +#ifdef _MOVE_STALE_TO_FRONT + else { + break; + } +#endif + } + + /* if we have a parent, and our parent has become stale, ensure this, the child, becomes stale as well */ + if(proc->parent && proc->parent->is_stale) { + proc->is_stale = 1; + proc->parent->children_changed = 1; + return SAMPLE_CHANGED; + } + + /* maintain our awareness of children, if we detect a new child initiate monitoring for it, existing children get their generation number updated */ + start = &proc->children; + while((len = try_read((*store)->children_fd, vmon->buf, sizeof(vmon->buf))) > 0) { + for(i = 0; i < len; i++) { + switch(vmon->buf[i]) { + case '0' ... '9': + /* PID component, accumulate it */ + child_pid *= 10; + child_pid += (vmon->buf[i] - '0'); + break; + + case ' ': + /* separator, terminates a PID, search for it in the childrens list */ + found = 0; + list_for_each(cur, start) { + if(list_entry(cur, vmon_proc_t, siblings)->pid == child_pid) { + /* found the child already monitored, update its generation number and stop searching */ + tmp = list_entry(cur, vmon_proc_t, siblings); + tmp->generation = vmon->generation; + found = 1; + tmp->is_new = 0; + break; + } + } + + if(found || (tmp = vmon_proc_monitor(vmon, proc, child_pid, proc->wants, NULL, NULL))) { + /* position the process in the siblings list, and update the start */ + /* move to front breaks vwm, we rely on the stale processes maintaining their position! maybe make it an option to vmon_init() since it can be a useful optimization. */ +#ifdef _MOVE_STALE_TO_FRONT + list_move_tail(&tmp->siblings, start); +#endif + start = &tmp->siblings; + } /* else { vmon_proc_monitor failed just move on } */ + + child_pid = 0; + break; + } + } + } + + /* look for children which seem to no longer exist (found by stale generation numbers) and queue them for unmonitoring, flag this as a children change too */ + found = 0; + list_for_each_entry(tmp, &proc->children, siblings) { + if(tmp->generation != vmon->generation) { + /* set children not found to stale status so the caller can respond and on our next sample invocation we will unmonitor them */ + found = tmp->is_stale = 1; + } +#ifdef _MOVE_STALE_TO_FRONT + /* this depends on the moving of stale entries to the start of the list optimization which breaks vwm, disabled for now */ + else { + break; + } +#endif + } + + /* XXX TODO: does it makes sense for shit to happen here? */ + if(found) { + if(proc->parent) { + proc->parent->children_changed = 1; + } else { + vmon->processes_changed = 1; + } + } + + return changes ? SAMPLE_CHANGED : SAMPLE_UNCHANGED; +} + + +/* implements the thread following */ +static int proc_follow_threads(vmon_t *vmon, vmon_proc_t *proc, vmon_proc_follow_threads_t **store) +{ + int changes = 0; + struct dirent dentry, *dentry_res; + list_head_t *cur, *start; + vmon_proc_t *tmp, *_tmp; + int found; + + if(!proc) { /* dtor */ + try_closedir(&(*store)->task_dir); + + return DTOR_FREE; + } + + if(proc->is_thread) { /* bypass following the threads of threads */ + return SAMPLE_UNCHANGED; + } + + if(!proc->stores || !proc->stores[VMON_STORE_PROC_STAT] || (((vmon_proc_stat_t *)proc->stores[VMON_STORE_PROC_STAT])->num_threads <= 1 && list_empty(&proc->threads))) { + /* bypass following of threads if we either can't determine the number from the proc stat sample or if the sample says there's 1 or less (and an empty threads list, handling stale exited threads) */ + /* XXX I'm not sure if this is always the right thing to do, there may be some situations where one could play games with clone() directly + * and escape the monitoring library with a lone thread having had the main thread exit, leaving the count at 1 while having a process + * descriptor distinguished from the single thread XXX */ + return SAMPLE_UNCHANGED; + } + + if(!(*store)) { /* implicit ctor on first sample */ + *store = calloc(1, sizeof(vmon_proc_follow_threads_t)); + + (*store)->task_dir = opendirf(vmon, vmon->proc_dir, "%i/task", proc->pid); + } else if((*store)->task_dir) { + seekdir((*store)->task_dir, 0); + } + + if(!(*store)->task_dir) { + return SAMPLE_ERROR; + } + + /* unmonitor stale threads on entry, this concludes the two-phase removal of a thread (just like follow_children) */ + list_for_each_entry_safe(tmp, _tmp, &proc->threads, threads) { + if(tmp->is_stale) { + vmon_proc_unmonitor(vmon, tmp, NULL, NULL); + } +#ifdef _MOVE_STALE_TO_FRONT + else { + break; + } +#endif + } + + start = &proc->threads; + while(!readdir_r((*store)->task_dir, &dentry, &dentry_res) && dentry_res) { + int tid; + + if(dentry.d_name[0] == '.' && (dentry.d_name[1] == '\0' || (dentry.d_name[1] == '.' && dentry.d_name[2] == '\0'))) { + /* skip . and .. */ + continue; + } + + tid = atoi(dentry.d_name); + + found = 0; + list_for_each(cur, start) { + if(cur == &proc->threads) { /* take care to skip the head node */ + continue; + } + + if(list_entry(cur, vmon_proc_t, threads)->pid == tid) { + /* found the thread already monitored, update its generation number and stop searching */ + tmp = list_entry(cur, vmon_proc_t, threads); + tmp->generation = vmon->generation; + found = 1; + tmp->is_new = 0; + break; + } + } + + if(found || (tmp = vmon_proc_monitor(vmon, proc, tid, (proc->wants | VMON_INTERNAL_PROC_IS_THREAD), NULL, NULL))) { + /* position the thread in the threads list, and update the start */ +#ifdef _MOVE_STALE_TO_FRONT + list_move_tail(&tmp->threads, start); +#endif + start = &tmp->threads; + } /* else { vmon_proc_monitor failed just move on } */ + } + + list_for_each_entry_safe(tmp, _tmp, &proc->threads, threads) { + if(tmp->generation != vmon->generation) { + /* set children not found to stale status so the caller can respond and on our next sample invocation we will unmonitor them */ + tmp->is_stale = 1; + } +#ifdef _MOVE_STALE_TO_FRONT + else { + break; + } +#endif + } + + return changes ? SAMPLE_CHANGED : SAMPLE_UNCHANGED; +} + + +/* helper for maintaining reference counted global objects table */ +static vmon_fobject_t * fobject_lookup_hinted(vmon_t *vmon, const char *path, vmon_fobject_t *hint) +{ + vmon_fobject_t *fobject = NULL, *tmp = NULL; + uint64_t inum; + + /* TODO maintain the fobject hash tables, they should probably be isolated/scoped based on the string before the : */ + /* in reality there needs to be a list somewhere of the valid prefixes we wish to support, and that list should associate + * the prefixes with the kind of contextual information details we monitor for each of those types. Then when new + * fobject types are added to libvmon, the rest of the code automatically reflects the additions due to the mechanization. + */ + if(!path || strncmp(path, "pipe:", 5)) { + return NULL; /* XXX TODO: for now we're only dealing with pipes */ + } + + sscanf(&path[6], "%" SCNu64 "]", &inum); + + if(hint && hint->inum == inum) { + /* the hint matches, skip the search */ + return hint; + } + + /* search for the inode, if we can't find it, allocate a new fobject XXX this needs optimizing but silly until we have all object types handled... */ + list_for_each_entry(tmp, &vmon->fobjects, bucket) { + if(tmp->inum == inum) { + fobject = tmp; + break; + } + } + + if(!fobject) { + /* create a new fobject */ + fobject = malloc(sizeof(vmon_fobject_t)); + + fobject->type = VMON_FOBJECT_TYPE_PIPE; + fobject->inum = inum; + INIT_LIST_HEAD(&fobject->ref_fds); + INIT_LIST_HEAD(&fobject->bucket); + fobject->refcnt = 0; + fobject->foo = NULL; + list_add_tail(&fobject->bucket, &vmon->fobjects); + vmon->fobjects_nr++; + + if(vmon->fobject_ctor_cb) { + vmon->fobject_ctor_cb(vmon, fobject); + } + } + + return fobject; +} + + +/* add a reference to an fobject, fd_ref is optional (should be present if the reference is due to an open fd, which may not be the case) */ +static void fobject_ref(vmon_t *vmon, vmon_fobject_t *fobject, vmon_proc_fd_t *fd_ref) +{ + fobject->refcnt++; + + if(fd_ref) { + list_add_tail(&fd_ref->ref_fds, &fobject->ref_fds); + } +} + + +/* fobject is required and is the object being unrefereced, fd_ref is optional but represents the per-process fd reference being used to access this fobject via */ +static int fobject_unref(vmon_t *vmon, vmon_fobject_t *fobject, vmon_proc_fd_t *fd_ref) +{ + if(fd_ref) { + list_del(&fd_ref->ref_fds); + } + + fobject->refcnt--; + + if(!fobject->refcnt) { + /* after the refcnt drops to zero we discard the fobject */ + list_del(&fobject->bucket); + vmon->fobjects_nr--; + + if(vmon->fobject_dtor_cb) { + vmon->fobject_dtor_cb(vmon, fobject); + } + + free(fobject); + return 1; + } + + return 0; +} + + +/* helper for deleting an fd from the per-process fds list list */ +static void del_fd(vmon_t *vmon, vmon_proc_fd_t *fd) +{ + list_del(&fd->fds); + if(fd->object) { + fobject_unref(vmon, fd->object, fd); /* note we supply both the fobject ptr and proc_fd ptr (fd) */ + } + try_free((void **)&fd->object_path); + free(fd); +} + + +/* implements the open file descriptors (/proc/$pid/fd/...) sampling */ +static sample_ret_t proc_sample_files(vmon_t *vmon, vmon_proc_t *proc, vmon_proc_files_t **store) +{ + int changes = 0; + struct dirent dentry, *dentry_res; + int fdnum; + list_head_t *cur, *start; + vmon_proc_fd_t *fd, *_fd; + vmon_fobject_t *cur_object = NULL; + + if(!proc) { + /* dtor implementation */ + if(--((*store)->refcnt)) { /* suppress dtor while references exist, the store is shared */ + return DTOR_NOFREE; + } + + try_closedir(&(*store)->fd_dir); + + list_for_each_entry_safe(fd, _fd, &(*store)->fds, fds) { + del_fd(vmon, fd); + } + + return DTOR_FREE; + } + + if(proc->is_thread) { + /* don't monitor the open files of threads, instead, share the files store of the parent process by adding a reference to it */ + /* XXX TODO: use kcmp CMP_FILES in the future instead of assuming all threads share open files */ + if(!(*store) && ((*store) = proc->parent->stores[VMON_STORE_PROC_FILES])) { + (*store)->refcnt++; + } + return SAMPLE_UNCHANGED; /* XXX TODO: we actually want to reflect/copy the activity state of the parent */ + } + + if(!(*store)) { /* implicit ctor on first sample */ + *store = calloc(1, sizeof(vmon_proc_files_t)); + + (*store)->refcnt = 1; + (*store)->fd_dir = opendirf(vmon, vmon->proc_dir, "%i/fd", proc->pid); + + INIT_LIST_HEAD(&(*store)->fds); + } else if((*store)->fd_dir) { + /* we have a directory handle, and we're reentering the function with the directory positioned at the end */ + seekdir((*store)->fd_dir, 0); + } + + if(!(*store)->fd_dir) { + /* we have no directory handle on reentry */ + /* XXX TODO: this happens when we don't have permission, this hsould be handled more elegantly/cleanly, and we don't + * make any attempt to ever reopen the directory because the ctor has already run. */ + goto _fail; + } + + start = &(*store)->fds; + while(!readdir_r((*store)->fd_dir, &dentry, &dentry_res) && dentry_res) { + if(dentry.d_name[0] == '.' && (dentry.d_name[1] == '\0' || (dentry.d_name[1] == '.' && dentry.d_name[2] == '\0'))) { + /* skip . and .. */ + continue; + } + + fdnum = atoi(dentry.d_name); + + /* search the process' files list for this fdnum */ + fd = NULL; + list_for_each(cur, start) { + if(cur == &(*store)->fds) { + continue; /* skip the head node as it's not boxed */ + } + if(list_entry(cur, vmon_proc_fd_t, fds)->fdnum == fdnum) { + fd = list_entry(cur, vmon_proc_fd_t, fds); + break; + } + } + + if(!fd) { + fd = calloc(1, sizeof(vmon_proc_fd_t)); + if(!fd) { + /* TODO: errors */ + goto _fail; + } + fd->fdnum = fdnum; + fd->process = proc; + INIT_LIST_HEAD(&fd->ref_fds); + list_add_tail(&fd->fds, start); + } else { + list_move_tail(&fd->fds, start); + } + + fd->generation = vmon->generation; + + /* Always readlink the fd path, since we have no way of knowing if it's a repurposed fdnum even when we've found a match. + * It would be nice if say.. the mtime of the /proc/$pid/fd directory changed if there's been any fd activity so we could skip the entire + * readdir+readlink loop in idle times, worth investigating. */ + readlinkf(vmon, &fd->object_path, vmon->proc_dir, "%i/fd/%s", proc->pid, dentry.d_name); + + cur_object = fd->object; /* stow the current object reference before we potentially replace it so we may unreference it if needed */ + fd->object = fobject_lookup_hinted(vmon, fd->object_path.array, cur_object); + if(cur_object != fd->object) { + if(cur_object) { + fobject_unref(vmon, cur_object, fd); + } + + if(fd->object) { + fobject_ref(vmon, fd->object, fd); + } + } /* else { lookup returned the same object as before (or NULL), is there anything to do? } */ + + start = &fd->fds; /* update the search start to this fd */ + } + + /* search for stale (closed) fds, remove references for any we find */ + list_for_each_entry_safe(fd, _fd, &(*store)->fds, fds) { + if(fd->generation != vmon->generation) { + del_fd(vmon, fd); + } else { + break; + } + } + + return changes ? SAMPLE_CHANGED : SAMPLE_UNCHANGED; + +_fail: + return SAMPLE_ERROR; +} + + +/* implements the vm utilization sampling */ +typedef enum _vmon_proc_vm_fsm_t { +#define VMON_ENUM_PARSER_STATES +#include "defs/proc_vm.def" +} vmon_proc_vm_fsm_t; + +static sample_ret_t proc_sample_vm(vmon_t *vmon, vmon_proc_t *proc, vmon_proc_vm_t **store) +{ + int i, len; + int changes = 0; + vmon_proc_vm_fsm_t state = VMON_PARSER_STATE_PROC_VM_SIZE_PAGES; +#define VMON_PREPARE_PARSER +#include "defs/proc_vm.def" + + if(!proc) { /* dtor */ + try_close(&(*store)->statm_fd); + + return DTOR_FREE; + } + + if(!(*store)) { /* ctor */ + (*store) = calloc(1, sizeof(vmon_proc_vm_t)); + if(proc->is_thread) { + (*store)->statm_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/task/%i/statm", proc->pid, proc->pid); + } else { + (*store)->statm_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/statm", proc->pid); + } + + /* initially everything is considered changed */ + memset((*store)->changed, 0xff, sizeof((*store)->changed)); + } else { + try_lseek((*store)->statm_fd, 0, SEEK_SET); + + /* clear the entire changed bitmap */ + memset((*store)->changed, 0, sizeof((*store)->changed)); + } + + /* read in statm and parse it assigning the vm members accordingly */ + while((len = try_read((*store)->statm_fd, vmon->buf, sizeof(vmon->buf))) > 0) { + for(i = 0; i < len; i++) { + /* parse the fields from the file, stepping through... */ + input = vmon->buf[i]; + switch(state) { +#define VMON_IMPLEMENT_PARSER +#include "defs/proc_vm.def" + default: + /* we're finished parsing once we've fallen off the end of the symbols */ + break; + } + } + } + + return changes ? SAMPLE_CHANGED : SAMPLE_UNCHANGED; +} + + +/* implements the io utilization sampling */ +typedef enum _vmon_proc_io_fsm_t { +#define VMON_ENUM_PARSER_STATES +#include "defs/proc_io.def" +} vmon_proc_io_fsm_t; + +static sample_ret_t proc_sample_io(vmon_t *vmon, vmon_proc_t *proc, vmon_proc_io_t **store) +{ + int i, len; + int changes = 0; + vmon_proc_io_fsm_t state = VMON_PARSER_STATE_PROC_IO_RCHAR_LABEL; +#define VMON_PREPARE_PARSER +#include "defs/proc_io.def" + + if(!proc) { /* dtor */ + try_close(&(*store)->io_fd); + + return DTOR_FREE; + } + + if(!(*store)) { /* ctor */ + (*store) = calloc(1, sizeof(vmon_proc_io_t)); + if(proc->is_thread) { + (*store)->io_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/task/%i/io", proc->pid, proc->pid); + } else { + (*store)->io_fd = openf(vmon, O_RDONLY, vmon->proc_dir, "%i/io", proc->pid); + } + + /* initially everything is considered changed */ + memset((*store)->changed, 0xff, sizeof((*store)->changed)); + } else { + try_lseek((*store)->io_fd, 0, SEEK_SET); + + /* clear the entire changed bitmap */ + memset((*store)->changed, 0, sizeof((*store)->changed)); + } + + /* read in io and parse it assigning the io members accordingly */ + while((len = try_read((*store)->io_fd, vmon->buf, sizeof(vmon->buf))) > 0) { + for(i = 0; i < len; i++) { + /* parse the fields from the file, stepping through... */ + input = vmon->buf[i]; + switch(state) { +#define VMON_IMPLEMENT_PARSER +#include "defs/proc_io.def" + default: + /* we're finished parsing once we've fallen off the end of the symbols */ + break; + } + } + } + + return changes ? SAMPLE_CHANGED : SAMPLE_UNCHANGED; +} + + +/* here starts the private system-wide samplers */ + +typedef enum _vmon_sys_stat_fsm_t { +#define VMON_ENUM_PARSER_STATES +#include "defs/sys_stat.def" +} vmon_sys_stat_fsm_t; + +/* system-wide stat sampling, things like CPU usages, stuff in /proc/stat */ +static sample_ret_t sys_sample_stat(vmon_t *vmon, vmon_sys_stat_t **store) +{ + int i, len; + int changes = 0; + vmon_sys_stat_fsm_t state = VMON_PARSER_STATE_SYS_STAT_CPU_PREFIX; /* this could be defined as the "VMON_PARSER_INITIAL_STATE" */ +#define VMON_PREPARE_PARSER +#include "defs/sys_stat.def" + + if(!vmon) { /* dtor */ + try_close(&(*store)->stat_fd); + return DTOR_FREE; + } + + if(!(*store)) { /* ctor */ + (*store) = calloc(1, sizeof(vmon_sys_stat_t)); + (*store)->stat_fd = openat(dirfd(vmon->proc_dir), "stat", O_RDONLY); + } else { + try_lseek((*store)->stat_fd, 0, SEEK_SET); + } + + while((len = try_read((*store)->stat_fd, vmon->buf, sizeof(vmon->buf))) > 0) { + for(i = 0; i < len; i++) { + input = vmon->buf[i]; + switch(state) { +#define VMON_PARSER_DELIM ' ' /* TODO XXX eliminate the need for this, I want the .def's to include all the data format knowledge */ +#define VMON_IMPLEMENT_PARSER +#include "defs/sys_stat.def" + default: + /* we're finished parsing once we've fallen off the end of the symbols */ + break; + } + } + } + + return changes ? SAMPLE_CHANGED : SAMPLE_UNCHANGED; +} + + +/* system-wide vm sampling, /proc/meminfo & /proc/vmstat */ +typedef enum _vmon_sys_vm_fsm_t { +#define VMON_ENUM_PARSER_STATES +#include "defs/sys_vm.def" +} vmon_sys_vm_fsm_t; + +static sample_ret_t sys_sample_vm(vmon_t *vmon, vmon_sys_vm_t **store) +{ + int i, len; + int changes = 0; + vmon_sys_vm_fsm_t state = VMON_PARSER_STATE_SYS_VM_TOTAL_KB_LABEL; /* this could be defined as the "VMON_PARSER_INITIAL_STATE" */ +#define VMON_PREPARE_PARSER +#include "defs/sys_vm.def" + + if(!vmon) { /* dtor */ + try_close(&(*store)->meminfo_fd); + return DTOR_FREE; + } + + if(!(*store)) { /* ctor */ + (*store) = calloc(1, sizeof(vmon_sys_vm_t)); + (*store)->meminfo_fd = openat(dirfd(vmon->proc_dir), "meminfo", O_RDONLY); + + /* initially everything is considered changed */ + memset((*store)->changed, 0xff, sizeof((*store)->changed)); + } else { + try_lseek((*store)->meminfo_fd, 0, SEEK_SET); + memset((*store)->changed, 0, sizeof((*store)->changed)); + } + + while((len = try_read((*store)->meminfo_fd, vmon->buf, sizeof(vmon->buf))) > 0) { + for(i = 0; i < len; i++) { + input = vmon->buf[i]; + switch(state) { +#define VMON_PARSER_DELIM ' ' /* TODO XXX eliminate the need for this, I want the .def's to include all the data format knowledge */ +#define VMON_IMPLEMENT_PARSER +#include "defs/sys_vm.def" + default: + /* we're finished parsing once we've fallen off the end of the symbols */ + break; + } + } + } + + return changes ? SAMPLE_CHANGED : SAMPLE_UNCHANGED; +} + + +/* here begins the public interface */ + +/* initialize a vmon instance, proc_wants is a default wants mask, optionally inherited vmon_proc_monitor() calls */ +int vmon_init(vmon_t *vmon, vmon_flags_t flags, vmon_sys_wants_t sys_wants, vmon_proc_wants_t proc_wants) +{ + int i; + + if((flags & VMON_FLAG_PROC_ALL) && (proc_wants & VMON_WANT_PROC_FOLLOW_CHILDREN)) { + return 0; + } + + if(!(vmon->proc_dir = opendir("/proc"))) { + return 0; + } + + INIT_LIST_HEAD(&vmon->processes); + INIT_LIST_HEAD(&vmon->orphans); + + for(i = 0; i < VMON_HTAB_SIZE; i++) { + INIT_LIST_HEAD(&vmon->htab[i]); + } + + memset(vmon->stores, 0, sizeof(vmon->stores)); + + /* TODO XXX: rename to something processes-specific! see vmon.h */ + vmon->array = NULL; + vmon->array_allocated_nr = vmon->array_active_nr = vmon->array_hint_free = 0; + + /* TODO XXX: this is temporary, see vmon.h */ + INIT_LIST_HEAD(&vmon->fobjects); + vmon->fobjects_nr = 0; + + vmon->flags = flags; + vmon->sys_wants = sys_wants; + vmon->proc_wants = proc_wants; + + /* here we populate the sys and proc function tables */ +#define vmon_want(_sym, _name, _func) \ + vmon->sys_funcs[VMON_STORE_ ## _sym] = (int(*)(vmon_t *, void **))_func; +#include "defs/sys_wants.def" + +#define vmon_want(_sym, _name, _func) \ + vmon->proc_funcs[VMON_STORE_ ## _sym] = (int(*)(vmon_t *, vmon_proc_t *, void **))_func; +#include "defs/proc_wants.def" + + vmon->sample_cb = NULL; + vmon->proc_ctor_cb = NULL; + vmon->proc_dtor_cb = NULL; + vmon->fobject_ctor_cb = NULL; + vmon->fobject_dtor_cb = NULL; + + return 1; +} + + +/* destroy vmon instance */ +void vmon_destroy(vmon_t *vmon) +{ + /* TODO: do we want to forcibly unmonitor everything being monitored still, or require the caller to have done that beforehand? */ + /* TODO: cleanup other shit, like closedir(vmon->proc_dir), etc */ +} + + +/* helper for searching for the process in the process array, specify NULL to find a free slot */ +static int find_proc_in_array(vmon_t *vmon, vmon_proc_t *proc, int hint) +{ + int ret = -1; + + if(hint >= 0 && hint < vmon->array_allocated_nr && vmon->array[hint] == proc) { + /* the hint was accurate, bypass the search */ + ret = hint; + } else { + int i; + + /* search for the entry in the array */ + for(i = 0; i < vmon->array_allocated_nr; i++) { + if(vmon->array[i] == proc) { + ret = i; + break; + } + } + } + + if(!proc && ret == -1) { + vmon_proc_t **tmp; + + /* enlarge the array */ + tmp = realloc(vmon->array, (vmon->array_allocated_nr + VMON_ARRAY_GROWBY) * sizeof(vmon_proc_t *)); + if(tmp) { + memset(&tmp[vmon->array_allocated_nr], 0, VMON_ARRAY_GROWBY * sizeof(vmon_proc_t *)); + ret = vmon->array_hint_free = vmon->array_allocated_nr; + vmon->array_allocated_nr += VMON_ARRAY_GROWBY; + vmon->array = tmp; + } /* XXX TODO: handle realloc failure */ + } + + return ret; +} + + +/* simple helper for installing callbacks on the callback lists, currently only used for the per-process sample callbacks */ +/* will not install the same callback function & arg combination more than once, and will not install NULL-functioned callbacks at all! */ +static int maybe_install_proc_callback(vmon_t *vmon, list_head_t *callbacks, void (*func)(vmon_t *, vmon_proc_t *, void *), void *arg) +{ + if(func) { + vmon_proc_callback_t *cb; + + list_for_each_entry(cb, callbacks, callbacks) { + if(cb->func == func && cb->arg == arg) { + break; + } + } + + if(&cb->callbacks == callbacks) { + cb = malloc(sizeof(vmon_proc_callback_t)); + if(!cb) { + return 0; + } + cb->func = func; + cb->arg = arg; + list_add_tail(&cb->callbacks, callbacks); + } + } + + return 1; +} + + +/* monitor a process under a given vmon instance, the public interface. + * XXX note it's impossible to say "none" for wants per-process, just "inherit", if vmon_init() was told a proc_wants of "inherit" then it's like having "none" + * proc_wants for all proceses, perhaps improve this if there's a pressure to support this use case */ +vmon_proc_t * vmon_proc_monitor(vmon_t *vmon, vmon_proc_t *parent, int pid, vmon_proc_wants_t wants, void (*sample_cb)(vmon_t *, vmon_proc_t *, void *), void *sample_cb_data) +{ + vmon_proc_t *proc; + int hash = (pid % VMON_HTAB_SIZE), i; + int is_thread = (wants & VMON_INTERNAL_PROC_IS_THREAD) ? 1 : 0; + + wants &= ~VMON_INTERNAL_PROC_IS_THREAD; + + if(pid < 0) return NULL; + + list_for_each_entry(proc, &vmon->htab[hash], bucket) { + /* search for the process to see if it's already monitored, we allow threads to exist with the same pid hence the additional is_thread comparison */ + if(proc->pid == pid && proc->is_thread == is_thread) { + if(!maybe_install_proc_callback(vmon, &proc->sample_callbacks, sample_cb, sample_cb_data)) { + return NULL; + } + + proc->wants = wants; /* we can alter wants this way, though it clearly needs more consideration XXX */ + proc->refcnt++; + /* This is a predicament. If the top-level (externally-established) process monitor wins the race, the process has no parent and is on the vmon->processes list. + * Then the follow_children-established monitor comes along and wants to assign a parent, this isn't such a big deal, and we should be able to permit it, however, + * we're in the process of iterating the top-level processes list when we run the follow_children() sampler of a descendant which happens to also be the parent. + * We can't simply remove the process from the top-level processes list mid-iteration and stick it on the children list of the parent, the iterator could wind up + * following the new pointer into the parents children. + * + * What I'm doing for now is allowing the assignment of a parent when there is no parent, but we don't perform the vmon->processes to parent->children migration + * until the top-level sample_siblings() function sees the node with the parent. At that point, the node will migrate to the parent's children list. + */ + if(parent && !proc->parent) { + /* if a parent was supplied, and there is no current parent, the process is a top-level currently by external callers, but now appears to be a child of something as well, + * so in this scenario, we'll remove it from the top-level siblings list, and make it a child of the new parent. I don't think there needs to be concern about its being a thread here. */ + /* Note we can't simply move the process from its current processes list and add it to the supplied parent's children list, as that would break the iterator above us at the top-level, so + * we must defer the migration until the processes iterator context can do it for us - but this is tricky because we're in the middle of traversing our heirarchy and this process may + * be in a critical is_new state which must be realized this sample at its location in the heirarchy for correctness, there will be no reappearance of that critical state in the correct + * tree position for users like vwm. */ + /* the VMON_FLAG_2PASS flag has been introduced for users like vwm */ + proc->parent = parent; + } /* else if(parent && proc->parent) { XXX TODO: it shouldn't be possible to have conflicting parents, but may want to log an error if it happens. */ + + return proc; + } + } + + proc = (vmon_proc_t *)malloc(sizeof(vmon_proc_t)); + if(proc == NULL) { + /* TODO: report an error */ + return NULL; + } + + proc->pid = pid; + proc->wants = wants; + proc->generation = vmon->generation; + proc->refcnt = 1; + proc->is_new = 1; /* newly created process */ + proc->is_stale = 0; /* implicitly not stale, since it is new */ + proc->is_thread = is_thread; + memset(proc->stores, 0, sizeof(proc->stores)); + proc->parent = parent; + INIT_LIST_HEAD(&proc->sample_callbacks); + INIT_LIST_HEAD(&proc->children); + INIT_LIST_HEAD(&proc->siblings); + INIT_LIST_HEAD(&proc->threads); + + if(!maybe_install_proc_callback(vmon, &proc->sample_callbacks, sample_cb, sample_cb_data)) { + free(proc); + return NULL; + } + + if(parent) { + /* if a parent is specified, attach this process to the parent's children or threads with its siblings */ + if(is_thread) { + list_add_tail(&proc->threads, &parent->threads); + parent->threads_changed = 1; + } else { + list_add_tail(&proc->siblings, &parent->children); + parent->children_changed = 1; + } + } else { + /* if no parent is specified, this is a toplevel process, attach it to the vmon->processes list with its siblings */ + /* XXX ignoring is_thread if no parent is specified, it shouldn't occur, unless I want to support external callers monitoring specific threads explicitly, maybe... */ + list_add_tail(&proc->siblings, &vmon->processes); + vmon->processes_changed = 1; + } + + /* add this process to the hash table */ + list_add_tail(&proc->bucket, &vmon->htab[hash]); + + /* if process table maintenance is enabled acquire a free slot for this process */ + if((vmon->flags & VMON_FLAG_PROC_ARRAY) && (i = find_proc_in_array(vmon, NULL, vmon->array_hint_free)) != -1) { + vmon->array[i] = proc; + + /* cache where we get inserted into the array */ + proc->array_hint_pos = i; + } + + /* invoke ctor callback if set, note it's only called when a new vmon_proc_t has been instantiated */ + if(vmon->proc_ctor_cb) { + vmon->proc_ctor_cb(vmon, proc); + } + + return proc; +} + + +/* stop monitoring a process under a given vmon instance, a caller who supplied a sample_cb & sample_cb_data pair @ monitor() must also supply it @ unmonitor! */ +void vmon_proc_unmonitor(vmon_t *vmon, vmon_proc_t *proc, void (*sample_cb)(vmon_t *, vmon_proc_t *, void *), void *sample_cb_data) +{ + vmon_proc_t *child, *_child; + int i; + + if(sample_cb) { /* uninstall callback */ + vmon_proc_callback_t *cb, *_cb; + + list_for_each_entry_safe(cb, _cb, &proc->sample_callbacks, callbacks) { + if(cb->func == sample_cb && cb->arg == sample_cb_data) { + list_del(&cb->callbacks); + free(cb); + break; + } + } + } + + if(--(proc->refcnt)) { /* if the process still has references, don't free it */ + return; + } + + /* recursively unmonitor any children processes being monitored */ + list_for_each_entry_safe(child, _child, &proc->children, siblings) { + if(child->parent == proc) { + child->parent = NULL; /* children we're currently a parent of, we're going bye bye, so make them orphans */ + list_add_tail(&child->siblings, &vmon->orphans); /* if the child becomes actually dtor'd in the nxt step it immediately will be discarded from the orphans list ... */ + } + vmon_proc_unmonitor(vmon, child, NULL, NULL); + } + + /* unmonitor all threads being monitored, suppressed if this process is a thread itself, as threads don't have children */ + if(!proc->is_thread) { + list_for_each_entry_safe(child, _child, &proc->threads, threads) { + vmon_proc_unmonitor(vmon, child, NULL, NULL); + } + } + + /* if maintaining a process array NULL out the entry */ + if((vmon->flags & VMON_FLAG_PROC_ARRAY) && (i = find_proc_in_array(vmon, proc, proc->array_hint_pos)) != -1) { + vmon->array[i] = NULL; + /* store its index if the current free hint isn't free, or it's lower than the current free hint, making the hint useful */ + if(vmon->array[vmon->array_hint_free] || i < vmon->array_hint_free) { + vmon->array_hint_free = i; + } + } + + list_del(&proc->siblings); + if(proc->is_thread) { + list_del(&proc->threads); + } + list_del(&proc->bucket); + + if(proc->parent) { /* XXX TODO: verify this works ok for unmonitored orphans */ + /* set the children changed flag in the parent */ + if(proc->is_thread) { + proc->parent->threads_changed = 1; + } else { + proc->parent->children_changed = 1; /* XXX TODO: for now I modify children_changed for both when the child dtor occurs and is_stale gets set */ + } + } else { + /* or the toplevel processes changed flag if parentless/toplevel */ + vmon->processes_changed = 1; + } + + for(i = 0; i < sizeof(vmon->proc_funcs) / sizeof(vmon->proc_funcs[VMON_STORE_PROC_STAT]); i++) { + if(proc->stores[i] != NULL) { /* any non-NULL stores must have a function installed and must have been sampled, invoke the dtor branch */ + if(vmon->proc_funcs[i](vmon, NULL, &proc->stores[i]) == DTOR_FREE) { + free(proc->stores[i]); + } + proc->stores[i] = NULL; + } + } + + /* invoke the dtor if set, note it only happens when the vmon_proc_t instance is about to be freed, not when it transitions to proc.is_stale=1 */ + if(vmon->proc_dtor_cb) { + vmon->proc_dtor_cb(vmon, proc); + } + + free(proc); +} + + +/* internal sampling helper, perform sampling for a given process */ +static void sample(vmon_t *vmon, vmon_proc_t *proc) +{ + int i, wants, cur; + + /* load this process monitors wants, or inherit the default */ + wants = proc->wants ? proc->wants : vmon->proc_wants; + + proc->activity = 0; + for(i = 0, cur = 1; wants; cur <<= 1, i++) { + if(wants & cur) { + if(vmon->proc_funcs[i](vmon, proc, &proc->stores[i]) == SAMPLE_CHANGED) { + proc->activity |= cur; + } + wants &= ~cur; + } + } +} + + +/* internal sampling helper, perform sampling for all sibling processes in the provided siblings list */ +static int sample_threads(vmon_t *vmon, list_head_t *threads) +{ + vmon_proc_t *proc; + + list_for_each_entry(proc, threads, threads) { + sample(vmon, proc); + +#if 0 + /* callbacks can't be installed currently on threads */ + vmon_proc_callback_t *cb; + + list_for_each_entry(cb, &proc->sample_callbacks, callbacks) { + cb->func(vmon, proc, cb->arg); + } +#endif + } + + return 1; +} + + +/* internal single-pass sampling helper, recursively perform sampling and callbacks for all sibling processes in the provided siblings list */ +static int sample_siblings(vmon_t *vmon, list_head_t *siblings) +{ + vmon_proc_t *proc, *_proc; + + list_for_each_entry_safe(proc, _proc, siblings, siblings) { + vmon_proc_callback_t *cb; + int entered_new = 0; + + /* prepare to transition top-level processes out of the is_new state, there's no sampler acting on behalf of top-level processes */ + if(proc->is_new) { + entered_new = 1; + } + + sample(vmon, proc); /* invoke samplers for this node */ + sample_threads(vmon, &proc->threads); /* invoke samplers for this node's threads */ + sample_siblings(vmon, &proc->children); /* invoke samplers for this node's children, and their callbacks, by recursing into this function */ + /* XXX TODO: error returns */ + + /* if this is the top-level processes list, and proc has found a parent through the above sampling, migrate it to the parent's children list */ + if(siblings == &vmon->processes && proc->parent) { + list_del(&proc->siblings); + list_add_tail(&proc->siblings, &proc->parent->children); + continue; + } + + /* XXX note that sample_callbacks are called only after all the descendants have had their sampling performed (and their potential callbacks invoked) + * this enables the installation of a callback at a specific node in the process heirarchy which can also perform duties on behalf of the children + * being monitored, handy when automatically following children, an immediately relevant use case (vwm) + */ + list_for_each_entry(cb, &proc->sample_callbacks, callbacks) { + cb->func(vmon, proc, cb->arg); + } + + /* transition new to non-new processes where we're responsible, this is a slight problem */ + if(!proc->parent && entered_new) { + proc->is_new = 0; + } + } + + /* if we've just finished the top-level processes, and we have some orphans, we want to make the orphans top-level processes and sample them as such */ + if(siblings == &vmon->processes && !list_empty(&vmon->orphans)) { + /* XXX TODO: do I need to get these orphans sampled immediately for this sample? Are they getting skipped this sample? + * TODO: instrument the samplers to see if generation is > 1 behind to detect drops... */ + list_splice_init(&vmon->orphans, vmon->processes.prev); + } + + return 1; +} + + +/* 2pass version of the internal heirarchical sampling helper */ +static int sample_siblings_pass1(vmon_t *vmon, list_head_t *siblings) +{ + vmon_proc_t *proc, *_proc; + + /* invoke samplers */ + list_for_each_entry_safe(proc, _proc, siblings, siblings) { + sample(vmon, proc); /* invoke samplers for this node */ + sample_threads(vmon, &proc->threads); /* invoke samplers for this node's threads */ + sample_siblings_pass1(vmon, &proc->children); /* invoke samplers for this node's children, by recursing into this function */ + /* XXX TODO: error returns */ + + /* if this is the top-level processes list, and proc has found a parent through the above sampling, migrate it to the parent's children list */ + /* XXX: clarification; a process may have been monitored explicitly by an external caller which then becomes monitored as the followed child of + * another process, here we detect that and move the process out of the top-level processes list and down to the children list it belongs to. */ + if(siblings == &vmon->processes) { + /* XXX: nobody maintains the generation numbers for the top-level processes, so it's done here... + * TODO: detect exited top-level processes and do something useful? */ + proc->generation = vmon->generation; + + if(proc->parent) { + list_del(&proc->siblings); + list_add_tail(&proc->siblings, &proc->parent->children); + } + } + } + + if(siblings == &vmon->processes && !list_empty(&vmon->orphans)) { + /* XXX TODO: do I need to get these orphans sampled immediately for this sample? Are they getting skipped this sample? + * TODO: instrument the samplers to see if generation is > 1 behind to detect drops and log as bugs... */ + list_splice_init(&vmon->orphans, vmon->processes.prev); + } + + return 1; +} + + +static int sample_siblings_pass2(vmon_t *vmon, list_head_t *siblings) +{ + vmon_proc_t *proc; + + /* invoke callbacks */ + list_for_each_entry(proc, siblings, siblings) { + vmon_proc_callback_t *cb; + + sample_siblings_pass2(vmon, &proc->children); /* recurse into children, we invoke callbacks as encountered on nodes from the leaves up */ + + list_for_each_entry(cb, &proc->sample_callbacks, callbacks) { + cb->func(vmon, proc, cb->arg); + } + + if(!proc->parent && proc->is_new) { /* top-level processes aren't managed by a follower/sampler, so we need to clear their is_new flag, this approach is slightly deviant from the managed case, + * as the managed case will actually allow the process to retain its is_new flag across a vmon_sample() cycle, where we're clearing it @ exit. It makes + * no difference to the callbacks, but if someone walks the tree after vmon_sample() relying on is_new, they'll be confused. XXX TODO FIXME + * May be able to leverage the generation number and turn the top-level sampler into more of a follower analog??? + */ + proc->is_new = 0; + } + } + + return 1; +} + + +/* collect information for all monitored processes, this is the interesting part, call it periodically at a regular interval */ +int vmon_sample(vmon_t *vmon) +{ + int i, wants, cur, ret = 1; + + vmon->generation++; + + /* first manage the "all processes monitored" use case, this doesn't do any sampling, it just maintains the top-level list of processes being monitored */ + /* note this doesn't cover threads, as linux doesn't expose threads in the readdir of /proc, even though you can directly look them up at /proc/$tid */ + if((vmon->flags & VMON_FLAG_PROC_ALL)) { + struct dirent dentry, *dentry_res; + list_head_t *tmp, *_tmp = &vmon->processes; + + /* if VMON_FLAG_PROC_ALL flag is set, quite a different code path is used which simply readdir()'s /proc, treating every numeric directory found + * as a process to monitor. The list of toplevel processes being monitored is kept in sync with these, automatically monitoring + * new processes found, and unmonitoring processes now absent, in a fashion very similar to the proc_sample_files() code. */ + seekdir(vmon->proc_dir, 0); + while(!readdir_r(vmon->proc_dir, &dentry, &dentry_res) && dentry_res) { + int pid, found; + + if(dentry.d_type != DT_DIR || dentry.d_name[0] < '0' || dentry.d_name[0] > '9') { + /* skip non-directories and non-numeric directories */ + continue; + } + + pid = atoi(dentry.d_name); + + found = 0; + list_for_each(tmp, _tmp) { /* note how we use _tmp as the head for the processes iteration, resuming from the last process' node */ + if(tmp == &vmon->processes) { + continue; /* must take care to skip the processes list_head_t, as it's not a vmon_proc_t */ + } + + if(list_entry(tmp, vmon_proc_t, siblings)->pid == pid) { + found = 1; + break; + } + } + + if(!found) { + /* monitor the process */ + vmon_proc_t *proc = vmon_proc_monitor(vmon, NULL, pid, vmon->proc_wants, NULL, NULL); + + if(!proc) { + /* TODO error */ + continue; + } + + tmp = &proc->siblings; + } + + list_move_tail(tmp, _tmp); /* place this process next to the current start (XXX there are cases where it's already there) */ + + list_entry(tmp, vmon_proc_t, siblings)->generation = vmon->generation; /* for identifying stale nodes */ + + _tmp = tmp; /* set this node as the head to start the next search from */ + } + + list_for_each_safe(tmp, _tmp, &vmon->processes) { /* XXX safe version needed since vmon_proc_unmonitor() deletes from the processes list */ + if(list_entry(tmp, vmon_proc_t, siblings)->generation != vmon->generation) { + vmon_proc_unmonitor(vmon, list_entry(tmp, vmon_proc_t, siblings), NULL, NULL); + } else { + /* we can stop looking for stale processes upon finding a non-stale one, since they've been sorted by the above algorithm */ + break; + } + } + } + + /* now for actual sampling */ + + /* first the sys-wide samplers */ + wants = vmon->sys_wants; /* the caller-requested sys-wide wants */ + vmon->activity = 0; + for(i = 0, cur = 1; wants; cur <<= 1, i++) { + if(wants & cur) { + if(vmon->sys_funcs[i](vmon, &vmon->stores[i]) == SAMPLE_CHANGED) { + vmon->activity |= cur; + } + wants &= ~cur; + } + } + + if(vmon->sample_cb) { + vmon->sample_cb(vmon); + } + + /* then the per-process samplers */ + if((vmon->flags & VMON_FLAG_PROC_ARRAY)) { + int j; + /* TODO: determine if this really makes sense, if we always maintain a heirarchy even in array mode, then we + * should probably always sample in the heirarchical order, or maybe make it caller-specified. + * There is a benefit to invoking the callbacks in heirarchical order, the callbacks can make assumptions about the children + * having the callbacks invoked prior to the current node, if done in depth-first order.... + * XXX this is a problem, figure out what to do with this, for now we don't even maintain the heirarchy in VMON_FLAG_PROC_ALL + * mode, only FOLLOW_CHILDREN mode, and it's likely PROC_ARRAY will generally be used together with PROC_ALL, so no heirarchy + * is available to traverse even if we wanted to. + */ + + /* flat process-array ordered sampling, in this mode threads and processes are all placed flatly in the array, + * so this does the sampling for all monitored in no particular order */ + for(j = 0; j < vmon->array_allocated_nr; j++) { + vmon_proc_t *proc; + + if((proc = vmon->array[j])) { + vmon_proc_callback_t *cb; + + sample(vmon, proc); + + list_for_each_entry(cb, &proc->sample_callbacks, callbacks) { + cb->func(vmon, proc, cb->arg); + } + + /* age process, we use the presence of a parent as a flag indicating if the process is managed ala follow children/threads + * XXX TODO: should probably change the public _monitor() api to not contain a parent param then */ + if(!proc->parent && proc->is_new) { + proc->is_new = 0; + } + } + } + } else if((vmon->flags & VMON_FLAG_2PASS)) { + /* recursive heirarchical depth-first processes tree sampling, at each node threads come before children, done in two passes: + * Pass 1. samplers + * Pass 2. callbacks + * XXX this is the path vwm utilizes, everything else is for other uses, like implementing top-like programs. + */ + ret = sample_siblings_pass1(vmon, &vmon->processes); /* XXX TODO: errors */ + ret = sample_siblings_pass2(vmon, &vmon->processes); + } else { + /* recursive heirarchical depth-first processes tree sampling, at each node threads come before children, done in a single pass: + * Pass 1. samplers; callbacks (for every node) + */ + ret = sample_siblings(vmon, &vmon->processes); + } + + return ret; +} diff --git a/src/libvmon/vmon.h b/src/libvmon/vmon.h new file mode 100644 index 0000000..06a062b --- /dev/null +++ b/src/libvmon/vmon.h @@ -0,0 +1,308 @@ +#ifndef _VMON_H +#define _VMON_H + +#include <sys/types.h> +#include <dirent.h> +#include <stdint.h> +#include <string.h> /* I use strcmp() in the type comparator definitions */ + +#include "bitmap.h" +#include "list.h" + +#define VMON_HTAB_SIZE 128 /* number of buckets in the processes hash table */ +#define VMON_ARRAY_GROWBY 5 /* number of elements to grow the processes array */ + +typedef enum _vmon_flags_t { + VMON_FLAG_NONE = 0, + VMON_FLAG_PROC_ARRAY = 1L, /* maintain a process array (useful if you need to do things like implement top(1) */ + VMON_FLAG_PROC_ALL = 1L << 1, /* monitor all the processes in the system (XXX this has some follow_children implications...) */ + VMON_FLAG_2PASS = 1L << 2, /* perform all sampling/wants in a first pass, then invoke all callbacks in second in vmon_sample(), important if your callbacks are layout-sensitive (vwm) */ +} vmon_flags_t; + +/* store ids, used as indices into the stores array, and shift offsets for the wants mask */ +typedef enum _vmon_sys_store_t { +#define vmon_want(_sym, _name, _func) VMON_STORE_ ## _sym, +#include "defs/sys_wants.def" + VMON_STORE_SYS_NR +} vmon_sys_store_t; + +typedef enum _vmon_sys_wants_t { + VMON_WANT_SYS_NONE = 0, +#define vmon_want(_sym, _name, _func) VMON_WANT_ ## _sym = 1L << VMON_STORE_ ## _sym, +#include "defs/sys_wants.def" +} vmon_sys_wants_t; + +typedef enum _vmon_proc_store_t { +#define vmon_want(_sym, _name, _func) VMON_STORE_ ## _sym, +#include "defs/proc_wants.def" + VMON_STORE_PROC_NR +} vmon_proc_store_t; + +typedef enum _vmon_proc_wants_t { + VMON_WANT_PROC_INHERIT = 0, +#define vmon_want(_sym, _name, _func) VMON_WANT_ ## _sym = 1L << VMON_STORE_ ## _sym, +#include "defs/proc_wants.def" + /* XXX: note proc_wants is internally overloaded in libvmon to communicate when a process is a thread-child of a process, so not all bits are available. */ +} vmon_proc_wants_t; + + +/* we add some new complex types */ +typedef struct _vmon_char_array_t { + char *array; + int len; + int alloc_len; +} vmon_char_array_t; + +typedef struct _vmon_str_array_t { + char **array; + int len; + int alloc_len; +} vmon_str_array_t; + + +/* system stat stuff (/proc/stat...) */ +typedef enum _vmon_sys_stat_sym_t { +#define VMON_ENUM_SYMBOLS +#include "defs/sys_stat.def" + VMON_SYS_STAT_NR /* append this symbol to the end so we have a count */ +} vmon_sys_stat_sym_t; + +typedef struct _vmon_sys_stat_t { + int stat_fd; + + char changed[BITNSLOTS(VMON_SYS_STAT_NR)]; /* bitmap for indicating changed fields */ + +#define VMON_DECLARE_MEMBERS +#include "defs/sys_stat.def" +} vmon_sys_stat_t; + + +/* system vm/mem stuff (/proc/meminfo, /proc/vmstat...) */ +typedef enum _vmon_sys_vm_sym_t { +#define VMON_ENUM_SYMBOLS +#include "defs/sys_vm.def" + VMON_SYS_VM_NR /* append this symbol to the end so we have a count */ +} vmon_sys_vm_sym_t; + +typedef struct _vmon_sys_vm_t { + int meminfo_fd; + + char changed[BITNSLOTS(VMON_SYS_VM_NR)]; /* bitmap for indicating changed fields */ + +#define VMON_DECLARE_MEMBERS +#include "defs/sys_vm.def" +} vmon_sys_vm_t; + + +/* stat things we always monitor for a process, regardless of the caller's wants */ +typedef enum _vmon_proc_stat_sym_t { +#define VMON_ENUM_SYMBOLS +#include "defs/proc_stat.def" + VMON_PROC_STAT_NR /* append this symbol to the end so we have a count */ +} vmon_proc_stat_sym_t; + +typedef struct _vmon_proc_stat_t { + int cmdline_fd, comm_fd, wchan_fd, stat_fd; /* per-process stat monitoring /proc/$pid/{wchan,stat} file handles */ + + char changed[BITNSLOTS(VMON_PROC_STAT_NR)]; /* bitmap for indicating changed fields */ + +#define VMON_DECLARE_MEMBERS +#include "defs/proc_stat.def" +} vmon_proc_stat_t; + + +/* vm-related per-process things we can monitor */ +typedef enum _vmon_proc_vm_sym_t { +#define VMON_ENUM_SYMBOLS +#include "defs/proc_vm.def" + VMON_PROC_VM_NR /* append this symbol to the end so we have a count */ +} vmon_proc_vm_sym_t; + +typedef struct _vmon_proc_vm_t { + int statm_fd; /* per-process vm monitoring /proc/$pid/statm file handle */ + + char changed[BITNSLOTS(VMON_PROC_VM_NR)]; /* bitmap for indicating changed fields */ + +#define VMON_DECLARE_MEMBERS +#include "defs/proc_vm.def" +} vmon_proc_vm_t; + + +/* io-related per-process things we can monitor */ +typedef enum _vmon_proc_io_sym_t { +#define VMON_ENUM_SYMBOLS +#include "defs/proc_io.def" + VMON_PROC_IO_NR /* append this symbol to the end so we have a count */ +} vmon_proc_io_sym_t; + +typedef struct _vmon_proc_io_t { + int io_fd; /* per-process io monitoring /proc/$pid/io file handle */ + + char changed[BITNSLOTS(VMON_PROC_IO_NR)]; /* bitmap for indicating changed fields */ + +#define VMON_DECLARE_MEMBERS +#include "defs/proc_io.def" +} vmon_proc_io_t; + + +/* follow children want context */ +typedef struct _vmon_proc_follow_children_t { + int children_fd; /* per-process children following /proc/$pid/task/$pid/children file handle */ +} vmon_proc_follow_children_t; + + +/* follow threads want context */ +typedef struct _vmon_proc_follow_threads_t { + DIR *task_dir; /* per-process threads monitoring /proc/$pid/task handle */ +} vmon_proc_follow_threads_t; + + +/* open files monitoring */ +typedef enum _vmon_proc_files_sym_t { +#define VMON_ENUM_SYMBOLS +#include "defs/proc_files.def" +} vmon_proc_files_sym_t; + +typedef enum _vmon_fobject_type_t { + VMON_FOBJECT_TYPE_UNRECOGNIZED = 0, + /* TODO, enumerate the possible opened fobject types, this should come out of a .def */ + VMON_FOBJECT_TYPE_PIPE, + VMON_FOBJECT_TYPE_SOCKET, + VMON_FOBJECT_TYPE_ANON, + VMON_FOBJECT_TYPE_NR +} vmon_fobject_type_t; + +typedef struct _vmon_fobject_t { + list_head_t bucket; /* fobjects hash table bucket this fobject belongs to */ + uint64_t inum; /* inode number */ + list_head_t ref_fds; /* referring fds list, this is a list of proc_fd_t's which appear to have this object open */ + int refcnt; /* reference count, this may be greater than the # of nodes in ref_fds, for instance the + monitoring of /proc/net/unix will maintain references to fobjects for every row, without + maintaing nodes on ref_fds. But there are certain fobjects which simply emerge due to + processes having them open (pipes) which are not explicitly monitored elsewhere, in those + cases the refcnt and number of nodes in ref_fds shall match. */ + vmon_fobject_type_t type; /* type for this fobject */ + + + /* TODO: possibly hook into the object-type-specific information here, if so, it should come out of .defs */ + /* XXX the question is do I want to introduce that resource allocation here as part of the fobject, or do I want + * it elsewhere and potentially optional? I think it makes sense to make it optional and triggered by asking for + * fobject detail monitoring, so instead of a union here we should have a pointer, and that pointer becomes useful + * when fobject-type monitors become active */ + void *foo; /* hook for caller's data, if needed (expected to be used together with fobject_[cd]tor_cb) */ +} vmon_fobject_t; + +typedef struct _vmon_proc_fd_t { + list_head_t fds; /* per-process files list node */ + int generation; /* generation number, for convenient detection of closed files */ + struct _vmon_proc_t *process; /* process this fd belongs to (annoying, but enables linking processes with fobject refs) */ + list_head_t ref_fds; /* ref_fds list node */ + vmon_fobject_t *object; /* the object instance this fd refers to (this object also contains the head for the refs list) */ + +#define VMON_DECLARE_MEMBERS +#include "defs/proc_files.def" +} vmon_proc_fd_t; + +typedef struct _vmon_proc_files_t { + int refcnt; /* reference count for dealing with sharing of open files (like threads...) */ + DIR *fd_dir; /* per-process files /proc/$pid/fd handle */ + list_head_t fds; /* per-process files linked list head */ +} vmon_proc_files_t; + + +/* TODO per-process VM stats monitoring */ + +struct _vmon_t; + + +/* list of callbacks is maintained for the per-process callbacks, it's convenient to do things like update multiple dynamic contexts associated with a given process monitor (think multiple windows) */ +typedef struct _vmon_proc_callback_t { + void (*func)(struct _vmon_t *, struct _vmon_proc_t *, void *); + void *arg; + list_head_t callbacks; +} vmon_proc_callback_t; + +typedef struct _vmon_proc_t { + list_head_t bucket; /* processes hash table bucket this process belongs to */ + + list_head_t children; /* head of the children of this process, empty when no children */ + list_head_t siblings; /* node in siblings list */ + list_head_t threads; /* head or node for the threads list, empty when process has no threads */ + + struct _vmon_proc_t *parent; /* reference to the parent */ + + int array_hint_pos; /* hint for the process's position in the array (when array maintenance has been requested) */ + + int pid; /* the PID of the process being monitored */ + + int generation; /* generation number, for convenient detection of exited processes */ + int refcnt; /* reference count on this node */ + vmon_proc_wants_t wants; /* wants @ this node */ + + vmon_proc_wants_t activity; /* bits updated when there's activity on the respective wants (stores have changes) */ + void *stores[VMON_STORE_PROC_NR]; /* pointers to the per-want per-monitored-process storage space */ + + /* callbacks invoked after sampling wants at and below this node */ + list_head_t sample_callbacks; /* list of callbacks to invoke sample_cb on behalf of (and supply as parameteres to) */ + void *foo; /* another per-process hook for whatever per-process uses the caller may have, but not managed by the api */ + + int children_changed:1; /* gets set when any of my immediate children have had is_new or is_stale set in the last sample */ + int threads_changed:1; /* gets set when any of my threads have had is_new or is_stale set in the last sample */ + int is_new:1; /* process is new in the most recent sample, automatically cleared on subsequent sample */ + int is_stale:1; /* process became stale in the most recent sample, automatically cleared on subsequent sample (process will be discarded) */ + int is_thread:1; /* process is a thread belonging to parent */ +} vmon_proc_t; + + +typedef struct _vmon_t { + DIR *proc_dir; /* /proc is opened @ vmon_init() */ + + /* TODO: rename this to something more contextually processes-specific */ + /* these array members are only relevant when array maintenance has been requested via VMON_FLAG_PROC_ARRAY @ vmon_init() */ + vmon_proc_t **array; /* array of processes being monitored (flat) */ + int array_allocated_nr; /* number of entries in the table */ + int array_active_nr; /* number of processes present in the table (including stale) */ + int array_hint_free; /* hint for a free element in the list */ + + list_head_t htab[VMON_HTAB_SIZE]; /* hash table for quickly finding processes being monitored */ + list_head_t processes; /* top of the processes heirarchy */ + list_head_t orphans; /* ephemeral list of processes orphaned this sample, orphans wind up becoming top-level processes */ + int processes_changed:1; /* flag set when the toplevel processes list changes */ + + list_head_t fobjects; /* XXX TODO: temporary single fobjects table, in the future this will be an array of type-indexed + * fobject hash tables */ + int fobjects_nr; /* XXX TODO: temporary simple counter of number of fobjects, this will change into something + * more like we have for the proceses array */ + vmon_flags_t flags; /* instance flags */ + vmon_sys_wants_t sys_wants; /* system-wide wants mask */ + vmon_proc_wants_t proc_wants; /* inherited per-process wants mask */ + + /* function tables for mapping of wants bits to functions (sys-wide and per-process) */ + int (*sys_funcs[VMON_STORE_SYS_NR])(struct _vmon_t *, void **); + int (*proc_funcs[VMON_STORE_PROC_NR])(struct _vmon_t *, vmon_proc_t *, void **); + + vmon_sys_wants_t activity; /* bits updated when there's activity on the respective wants (stores have changes) */ + void *stores[VMON_STORE_SYS_NR]; /* stores for the sys-wide wants */ + void (*sample_cb)(struct _vmon_t *); /* callback invoked after executing the selected sys wants (once per vmon_sample() call)) */ + + char buf[8192]; /* scratch buffer for private use XXX: it may make sense to dynamically size these... */ + char buf_bis[8192]; /* secondary scratch buffer for private use */ + int generation; /* generation counter for whatever might need it, increments with vmon_sample() calls */ + + /* callbacks we'll invoke in response to processes becoming instantiated and destroyed, when set */ + void (*proc_ctor_cb)(struct _vmon_t *, vmon_proc_t *); + void (*proc_dtor_cb)(struct _vmon_t *, vmon_proc_t *); + + /* callbacks we'll invoke in response to fobjects becoming instantiated and destroyed, when set */ + void (*fobject_ctor_cb)(struct _vmon_t *, vmon_fobject_t *); + void (*fobject_dtor_cb)(struct _vmon_t *, vmon_fobject_t *); +} vmon_t; + + +int vmon_init(vmon_t *, vmon_flags_t, vmon_sys_wants_t, vmon_proc_wants_t); +void vmon_destroy(vmon_t *); +vmon_proc_t * vmon_proc_monitor(vmon_t *, vmon_proc_t *, int, vmon_proc_wants_t, void (*)(vmon_t *, vmon_proc_t *, void *), void *); +void vmon_proc_unmonitor(vmon_t *, vmon_proc_t *, void (*)(vmon_t *, vmon_proc_t *, void *), void *); +int vmon_sample(vmon_t *); + +#endif |