Linux Certif

Toute la documentation sur la certification Linux LPI

ptrace

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ptrace - ¥×¥í¥»¥¹¤Î¥È¥ì¡¼¥¹

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#include <sys/ptrace.h>



long ptrace(enum __ptrace_request request, pid_t pid, 

            void *addr, void *data);

ÀâÌÀ

ptrace() ¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ï¡¢¿Æ¥×¥í¥»¥¹¤¬¡¢ÊÌ¤Î¥×¥í¥»¥¹¤Î¼Â¹Ô¤Î´Æ»ë/À©¸æ¤ò ¹Ô¤Ã¤¿¤ê¡¢¥³¥¢¥¤¥á¡¼¥¸ (core image) ¤ä¥ì¥¸¥¹¥¿¤ÎÄ´ºº/Êѹ¹¤ò ¹Ô¤Ã¤¿¤ê¤¹¤ë¼êÃʤòÄ󶡤¹¤ë¡£ ptrace() ¤Ï¡¢¼ç¤Ë¥Ö¥ì¡¼¥¯¥Ý¥¤¥ó¥È¤Ë¤è¤ë¥Ç¥Ð¥Ã¥°¤ä¥·¥¹¥Æ¥à¥³¡¼¥ë¤Î¥È¥ì¡¼¥¹¤ò ¼ÂÁõ¤¹¤ë¤Î¤ËÍѤ¤¤é¤ì¤ë¡£

¥È¥ì¡¼¥¹¤ò³«»Ï¤¹¤ë¤Ë¤Ï¡¢¤Þ¤º¿Æ¥×¥í¥»¥¹¤Ç fork(2) ¤ò¸Æ¤Ó½Ð¤¹¡£À¸À®¤µ¤ì¤¿»Ò¥×¥í¥»¥¹¤Ç PTRACE_TRACEME ¤ò¹Ô¤¤¡¢ ³¤¤¤Æ (ŵ·¿Åª¤Ë¤Ï) exec(3) ¤ò¹Ô¤Ê¤¦¡£ Ê̤ÎÊýË¡¤È¤·¤Æ¤Ï¡¢ ¿Æ¥×¥í¥»¥¹¤¬´û¸¤Î¥×¥í¥»¥¹¤ËÂФ·¤Æ PTRACE_ATTACH ¤ò»ÈÍѤ·¡¢ ¥È¥ì¡¼¥¹¤ò³«»Ï¤¹¤ë¡£

¥È¥ì¡¼¥¹¤Î¼Â¹ÔÃæ¡¢»Ò¥×¥í¥»¥¹¤Ï¥·¥°¥Ê¥ë¤¬ÇÛÁ÷¤µ¤ì¤ë¤¿¤Ó¤Ë¡¢ ¤¿¤È¤¨¤½¤Î¥·¥°¥Ê¥ë¤¬Ìµ»ë¤¹¤Ù¤­¤â¤Î¤Ç¤¢¤Ã¤Æ¤âÄä»ß¤¹¤ë (SIGKILL ¤ÏÎã³°¤Ç¡¢Ä̾ï¤É¤ª¤ê¤Î¸ú²Ì¤ò¤â¤¿¤é¤¹)¡£ ¿Æ¥×¥í¥»¥¹¤Ë¤Ï¼¡¤Î wait(2) ¤ÇÄÌÃΤµ¤ì¡¢Ää»ß¤·¤Æ¤¤¤ë´Ö¤Ë»Ò¥×¥í¥»¥¹¤òÄ´¤Ù¤¿¤ê½¤Àµ¤·¤¿¤ê¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£ ¤½¤·¤Æ¿Æ¥×¥í¥»¥¹¤Ï»Ò¥×¥í¥»¥¹¤Î¼Â¹Ô¤òºÆ³«¤µ¤»¤ë¤¬¡¢ÇÛÁ÷¤µ¤ì¤¿ ¥·¥°¥Ê¥ë¤ò̵»ë¤¹¤ë¤³¤È¤â¤Ç¤­¤ë (¤¢¤ë¤¤¤ÏÂå¤ï¤ê¤ËÊ̤Υ·¥°¥Ê¥ë¤ò ÇÛÁ÷¤¹¤ë¤³¤È¤â¤Ç¤­¤ë) ¡£

¿Æ¥×¥í¥»¥¹¤¬¥È¥ì¡¼¥¹¤ò½ªÎ»¤¹¤ëºÝ¤Ë¤Ï¡¢ PTRACE_KILL ¤ò»ÈÍѤ·¤Æ»Ò¥×¥í¥»¥¹¤ò½ªÎ»¤µ¤»¤ë¤³¤È¤â¤Ç¤­¤ë¤·¡¢ PTRACE_DETACH ¤òÍѤ¤¤ÆÄ̾ï¤Î¥È¥ì¡¼¥¹¤Ê¤·¤Î¥â¡¼¥É¤Ë¤·¤Æ¡¢ ¼Â¹Ô¤ò·Ñ³¤µ¤»¤ë¤³¤È¤â¤Ç¤­¤ë¡£

request ¤ÎÃͤ¬¤³¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤ÎÆ°ºî¤ò·èÄꤹ¤ë:

PTRACE_TRACEME

¤³¤Î¥×¥í¥»¥¹¤¬¿Æ¥×¥í¥»¥¹¤Ë¤è¤Ã¤Æ¥È¥ì¡¼¥¹¤µ¤ì¤ë¤³¤È¤òɽ¤¹¡£ ¤³¤Î¥×¥í¥»¥¹¤Ë (SIGKILL °Ê³°¤Î) ¥·¥°¥Ê¥ë¤¬ÇÛÁ÷¤µ¤ì¤ë¤È¡¢ ¥×¥í¥»¥¹¤ÏÄä»ß¤·¡¢¿Æ¥×¥í¥»¥¹¤Ë wait(2) ¤òÄ̤¸¤ÆÄÌÃΤµ¤ì¤ë¡£ ¤Þ¤¿¡¢¤³¤ì°Ê¹ß¤Ï¤³¤Î¥×¥í¥»¥¹¤¬ execve(2) ¤ò¸Æ¤Ó½Ð¤¹ÅÙ¤Ë SIGTRAP ¤¬Á÷¿®¤µ¤ì¤ë¤è¤¦¤Ë¤Ê¤ë¡£ ¤³¤ì¤Ë¤è¤Ã¤Æ¡¢¿Æ¥×¥í¥»¥¹¤Ï ¿·¤·¤¤¥×¥í¥°¥é¥à¤¬¼Â¹Ô¤ò³«»Ï¤¹¤ëÁ°¤ËÀ©¸æ¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£ ¿Æ¥×¥í¥»¥¹¤¬¼«¥×¥í¥»¥¹¤ò¥È¥ì¡¼¥¹¤¹¤ë¤Ä¤â¤ê¤¬¤Ê¤¤¾ì¹ç¤Ë¤Ï¡¢ ¤ª¤½¤é¤¯¤³¤Î¥×¥í¥»¥¹¤ÏËÜÍ×µá¤ò¹Ô¤¦¤Ù¤­¤Ç¤Ï¤Ê¤¤¤À¤í¤¦¡£ (pid, addr, data ¤Ï̵»ë¤µ¤ì¤ë¡£)

¾åµ­¤ÎÍ×µá¤Ï»Ò¥×¥í¥»¥¹¤À¤±¤¬¹Ô¤Ê¤¦¤â¤Î¤Ç¤¢¤ë¡£ »Ä¤ê¤Ï¿Æ¥×¥í¥»¥¹¤À¤±¤¬¹Ô¤Ê¤¦¤â¤Î¤Ç¤¢¤ë¡£ °Ê²¼¤ÎÍ×µá¤Ç¤Ï¡¢pid ¤ÇÁàºî¤ÎÂÐ¾Ý¤È¤Ê¤ë »Ò¥×¥í¥»¥¹¤ò»ØÄꤹ¤ë¡£ PTRACE_KILL ¤ò½ü¤­¡¢Í×µá¤ò¹Ô¤Ê¤¦¤¿¤á¤Ë¤Ï »Ò¥×¥í¥»¥¹¤ÏÄä»ß¤·¤Æ¤¤¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£

PTRACE_PEEKTEXT, PTRACE_PEEKDATA

»Ò¥×¥í¥»¥¹¤Î¥á¥â¥ê¤Î addr ¤Î°ÌÃÖ¤«¤é 1 ¥ï¡¼¥É¤òÆɤ߽Ф¹¡£Æɤ߽Ф·¤¿¥ï¡¼¥É¤Ï ptrace() ¤ÎÊÖ¤êÃͤȤ·¤ÆÊÖ¤µ¤ì¤ë¡£ Linux ¤Ç¤Ï¥Æ¥­¥¹¥È (text) ¤È¥Ç¡¼¥¿ (data) ¤Ç Ʊ¤¸¥¢¥É¥ì¥¹¶õ´Ö¤ò»ÈÍѤ¹¤ë¤¿¤á¡¢¤³¤Î 2 ¤Ä¤ÎÍ×µá¤Ï¸½ºß¤Î¤È¤³¤í Ʊ¤¸¤â¤Î¤Ç¤¢¤ë¡£ (°ú¤­¿ô data ¤Ï̵»ë¤µ¤ì¤ë¡£)

PTRACE_PEEKUSR

»Ò¥×¥í¥»¥¹¤Î USER Îΰè¤Î¥ª¥Õ¥»¥Ã¥È addr ¤Î°ÌÃÖ¤«¤é 1 ¥ï¡¼¥É¤òÆɤ߹þ¤à¡£USER Îΰè¤Ë¤Ï¤½¤Î¥×¥í¥»¥¹¤Î ¥ì¥¸¥¹¥¿ (registers) ¤Ê¤É¤Î¾ðÊó¤¬ÊÝ»ý¤µ¤ì¤Æ¤¤¤ë¡£(<linux/user.h> ¤È <sys/user.h> ¤ò»²¾È)¡£Æɤ߹þ¤ó¤À¥ï¡¼¥É¤Ï ptrace() ¥³¡¼¥ë¤Î·ë²Ì¤È¤·¤ÆÊÖ¤µ¤ì¤ë¡£ ¤¿¤¤¤Æ¤¤¤Ï¥ª¥Õ¥»¥Ã¥È¤Ï¥ï¡¼¥É¶­³¦¤Ë¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¤¬¡¢ ¥¢¡¼¥­¥Æ¥¯¥Á¥ã¤Ë¤è¤Ã¤Æ¤Ï¤½¤ÎɬÍפϤʤ¤¡£ (data ¤Ï̵»ë¤µ¤ì¤ë¡£ )

PTRACE_POKETEXT, PTRACE_POKEDATA

¥ï¡¼¥É data ¤ò»Ò¥×¥í¥»¥¹¤Î¥á¥â¥ê¤Î addr ¤Î°ÌÃ֤إ³¥Ô¡¼¤¹¤ë¡£¾å¤ÈƱÍͤˡ¢¸½ºß¤Î¤È¤³¤íÆó¤Ä¤Î Í×µá¤ÏƱ¤¸¤â¤Î¤Ç¤¢¤ë¡£

PTRACE_POKEUSR

¥ï¡¼¥É data ¤ò»Ò¥×¥í¥»¥¹¤Î USER Îΰè¤Î¥ª¥Õ¥»¥Ã¥È addr ¤Î°ÌÃ֤˥³¥Ô¡¼¤¹¤ë¡£ ¾å¤ÈƱÍͤˡ¢Ä̾¥ª¥Õ¥»¥Ã¥È¤Ï¥ï¡¼¥É¶­³¦¤Ë¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£ ¥«¡¼¥Í¥ë¤Î´°Á´À­ (integrity) ¤ò°Ý»ý¤¹¤ë¤¿¤á¡¢ Êѹ¹ÆâÍƤˤè¤Ã¤Æ¤Ï USER Îΰè¤ÎÊѹ¹¤Ï¶Ø»ß¤µ¤ì¤Æ¤¤¤ë¡£

PTRACE_GETREGS, PTRACE_GETFPREGS

¤½¤ì¤¾¤ì¡¢»Ò¥×¥í¥»¥¹¤ÎÈÆÍѥ쥸¥¹¥¿¡¢ÉâÆ°¾®¿ôÅÀ¥ì¥¸¥¹¥¿¤ò¿Æ¥×¥í¥»¥¹¤Î data ¤Î°ÌÃ֤˥³¥Ô¡¼¤¹¤ë¡£¤³¤Î data ¤Î½ñ¼°¤Ë´Ø¤·¤Æ¤Ï <linux/user.h> ¤ò»²¾È¤¹¤ë¤³¤È¡£(addr ¤Ï̵»ë¤µ¤ì¤ë¡£)

PTRACE_GETSIGINFO (Linux 2.3.99-pre6 °Ê¹ß)

Ää»ß¤Î¸¶°ø¤È¤Ê¤Ã¤¿¥·¥°¥Ê¥ë¤Ë´Ø¤¹¤ë¾ðÊó¤ò¼èÆÀ¤¹¤ë¡£ siginfo_t ¹½Â¤ÂÎ (sigaction(2) »²¾È) ¤ò»Ò¥×¥í¥»¥¹¤«¤é¿Æ¥×¥í¥»¥¹¤Î data ¤Î°ÌÃ֤˥³¥Ô¡¼¤¹¤ë¡£ (addr ¤Ï̵»ë¤µ¤ì¤ë¡£)

PTRACE_SETREGS, PTRACE_SETFPREGS

¤½¤ì¤¾¤ì¡¢»Ò¥×¥í¥»¥¹¤ÎÈÆÍѥ쥸¥¹¥¿¡¢ÉâÆ°¾®¿ôÅÀ¥ì¥¸¥¹¥¿¤Ë ¿Æ¥×¥í¥»¥¹¤Î date ¤Î°ÌÃÖ¤«¤é¥³¥Ô¡¼¤¹¤ë¡£ PTRACE_POKEUSER ¤ÈƱÍͤˡ¢ÈÆÍѥ쥸¥¹¥¿¤Ë¤è¤Ã¤Æ¤Ï Êѹ¹¤¬¶Ø»ß¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¤¬¤¢¤ë¡£ (addr ¤Ï̵»ë¤µ¤ì¤ë¡£)

PTRACE_SETSIGINFO (Linux 2.3.99-pre6 °Ê¹ß)

¥·¥°¥Ê¥ë¾ðÊó¤òÀßÄꤹ¤ë¡£ siginfo_t ¹½Â¤ÂΤò¿Æ¥×¥í¥»¥¹¤Î¥Ç¡¼¥¿ data ¤Î°ÌÃÖ¤«¤é »Ò¥×¥í¥»¥¹¤Ë¥³¥Ô¡¼¤¹¤ë¡£ ¤³¤Î½èÍý¤ò¹Ô¤¦¤³¤È¤¬¤Ç¤­¤ë¤Î¤Ï¡¢»Ò¥×¥í¥»¥¹¤ËÄ̾ï¤ÏÇÛÁ÷¤µ¤ì¤ë¤Ï¤º¤Ç ¥È¥ì¡¼¥µ¤ËÊ᪤µ¤ì¤¿¥·¥°¥Ê¥ë¤Ë¤Ä¤¤¤Æ¤À¤±¤Ç¤¢¤ë¡£ ¤³¤ì¤é¤ÎÄ̾ï¤Î¥·¥°¥Ê¥ë¤È ptrace() ¼«¿È¤¬È¯À¸¤¹¤ë¥·¥°¥Ê¥ë¤ò¸«Ê¬¤±¤ë¤Î¤ÏÆñ¤·¤¤¤«¤â¤·¤ì¤Ê¤¤¡£ (addr ¤Ï̵»ë¤µ¤ì¤ë¡£)

PTRACE_SETOPTIONS (Linux 2.4.6 °Ê¹ß; ¥Ð¥°¤Î¾Ï¤Ë¤¢¤ë·Ù¹ð¤â»²¾È)

¿Æ¥×¥í¥»¥¹¤Î data ¤Ë´ð¤Å¤¤¤Æ ptrace ¤Î¥ª¥×¥·¥ç¥ó¤òÀßÄꤹ¤ë (addr ¤Ï̵»ë¤µ¤ì¤ë)¡£ data ¤Ï¥ª¥×¥·¥ç¥ó¤Î¥Ó¥Ã¥È¥Þ¥¹¥¯¤È¤·¤Æ²ò¼á¤µ¤ì¡¢ ¥ª¥×¥·¥ç¥ó¤Ë¤Ï°Ê²¼¤Î¥Õ¥é¥°¤ò»ØÄê¤Ç¤­¤ë:

PTRACE_O_TRACESYSGOOD (Linux 2.4.6 °Ê¹ß)

¥·¥¹¥Æ¥à¥³¡¼¥ë¤Î¥È¥é¥Ã¥×¤¬ÇÛÁ÷¤µ¤ì¤¿¤È¤­¤Ë¡¢¥·¥°¥Ê¥ëÈÖ¹æ¤Î¥Ó¥Ã¥È 7 ¤òÀßÄꤹ¤ë (¤¹¤Ê¤ï¤Á¡¢(SIGTRAP | 0x80) ¤òÇÛÁ÷¤¹¤ë)¡£ ¤³¤ì¤Ë¤è¤ê¡¢¥È¥ì¡¼¥µ¤¬Ä̾ï¤Î¥È¥é¥Ã¥×¤È¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ë¤è¤ë¥È¥é¥Ã¥×¤ò ¶èÊ̤·¤ä¤¹¤¯¤Ê¤ë¡£ (PTRACE_O_TRACESYSGOOD ¤Ï¤É¤Î¥¢¡¼¥­¥Æ¥¯¥Á¥ã¤Ç¤âÆ°ºî¤·¤Ê¤¤²ÄǽÀ­¤¬¤¢¤ë¡£)

PTRACE_O_TRACEFORK (Linux 2.5.46 °Ê¹ß)

¼¡¤Î fork(2) ¸Æ¤Ó½Ð¤·»þ¤Ë SIGTRAP | PTRACE_EVENT_FORK << 8 ¤Ç»Ò¥×¥í¥»¥¹¤ÎÆ°ºî¤òÄä»ß¤µ¤»¡¢ ¿·¤¿¤Ë fork ¤µ¤ì¤¿¥×¥í¥»¥¹¤Î¥È¥ì¡¼¥¹¤ò¼«Æ°Åª¤Ë³«»Ï¤·¡¢ SIGSTOP ¤Ç¤½¤Î¥×¥í¥»¥¹¤Î¼Â¹Ô¤ò³«»Ï¤¹¤ë¡£ ¿·¤·¤¤¥×¥í¥»¥¹¤Î PID ¤Ï PTRACE_GETEVENTMSG ¤Ç¼èÆÀ¤Ç¤­¤ë¡£

PTRACE_O_TRACEVFORK (Linux 2.5.46 °Ê¹ß)

¼¡¤Î vfork(2) ¸Æ¤Ó½Ð¤·»þ¤Ë SIGTRAP | PTRACE_EVENT_VFORK << 8 ¤Ç»Ò¥×¥í¥»¥¹¤ÎÆ°ºî¤òÄä»ß¤µ¤»¡¢ ¿·¤¿¤Ë vfork ¤µ¤ì¤¿¥×¥í¥»¥¹¤Î¥È¥ì¡¼¥¹¤ò¼«Æ°Åª¤Ë³«»Ï¤·¡¢ SIGSTOP ¤Ç¤½¤Î¥×¥í¥»¥¹¤Î¼Â¹Ô¤ò³«»Ï¤¹¤ë¡£ ¿·¤·¤¤¥×¥í¥»¥¹¤Î PID ¤Ï PTRACE_GETEVENTMSG ¤Ç¼èÆÀ¤Ç¤­¤ë¡£

PTRACE_O_TRACECLONE (Linux 2.5.46 °Ê¹ß)

¼¡¤Î clone(2) ¸Æ¤Ó½Ð¤·»þ¤Ë SIGTRAP | PTRACE_EVENT_CLONE << 8 ¤Ç»Ò¥×¥í¥»¥¹¤ÎÆ°ºî¤òÄä»ß¤µ¤»¡¢ ¿·¤¿¤Ë clone ¤ÇºîÀ®¤µ¤ì¤¿¥×¥í¥»¥¹¤Î¥È¥ì¡¼¥¹¤ò¼«Æ°Åª¤Ë³«»Ï¤·¡¢ SIGSTOP ¤Ç¥×¥í¥»¥¹¤Î¼Â¹Ô¤ò³«»Ï¤¹¤ë¡£ ¿·¤·¤¤¥×¥í¥»¥¹¤Î PID ¤Ï PTRACE_GETEVENTMSG ¤Ç¼èÆÀ¤Ç¤­¤ë¡£ ¤³¤Î¥ª¥×¥·¥ç¥ó¤ÇÁ´¤Æ¤Î clone(2) ¥³¡¼¥ë¤òÊá¤Þ¤¨¤é¤ì¤ë¤ï¤±¤Ç¤Ï¤Ê¤¤¡£ »Ò¥×¥í¥»¥¹¤¬ CLONE_VFORK ¥Õ¥é¥°ÉÕ¤­¤Ç clone(2) ¤ò¸Æ¤Ó½Ð¤·¤¿¾ì¹ç¡¢PTRACE_O_TRACEVFORK ¤¬ÀßÄꤵ¤ì¤Æ¤¤¤ì¤ÐÂå¤ï¤ê¤Ë PTRACE_EVENT_VFORK ¤¬ÇÛÁ÷¤µ¤ì¤ë¡£ ¤Þ¤¿¡¢»Ò¥×¥í¥»¥¹¤¬½ªÎ»¥·¥°¥Ê¥ë¤ò SIGCHLD ¤ËÀßÄꤷ¤Æ clone(2) ¤ò¸Æ¤Ó½Ð¤·¤¿¾ì¹ç¤Ï¡¢PTRACE_O_TRACEFORK ¤¬ÀßÄꤵ¤ì¤Æ¤¤¤ì¤Ð PTRACE_EVENT_FORK ¤¬ÇÛÁ÷¤µ¤ì¤ë¡£

PTRACE_O_TRACEEXEC (Linux 2.5.46 °Ê¹ß)

¼¡¤Î execve(2) ¸Æ¤Ó½Ð¤·»þ¤Ë SIGTRAP | PTRACE_EVENT_EXEC << 8 ¤Ç»Ò¥×¥í¥»¥¹¤ÎÆ°ºî¤òÄä»ß¤µ¤»¤ë¡£

PTRACE_O_TRACEVFORKDONE (Linux 2.5.60 °Ê¹ß)

¼¡¤Î vfork(2) ¸Æ¤Ó½Ð¤·»þ¤Ë SIGTRAP | PTRACE_EVENT_VFORK_DONE << 8 ¤Ç»Ò¥×¥í¥»¥¹¤ÎÆ°ºî¤òÄä»ß¤µ¤»¤ë¡£

PTRACE_O_TRACEEXIT (Linux 2.5.60 °Ê¹ß)

½ªÎ» (exit) »þ¤Ë SIGTRAP | PTRACE_EVENT_EXIT << 8 ¤Ç»Ò¥×¥í¥»¥¹¤ÎÆ°ºî¤ò Ää»ß¤µ¤»¤ë¡£»Ò¥×¥í¥»¥¹¤Î½ªÎ»¥¹¥Æ¡¼¥¿¥¹¤Ï PTRACE_GETEVENTMSG ¤Ç¼èÆÀ¤Ç¤­¤ë¡£ ¤³¤ÎÄä»ß¤Ï¥ì¥¸¥¹¥¿¤¬¤Þ¤À»²¾È²Äǽ¤Ç¤¢¤ë¥×¥í¥»¥¹½ªÎ»½èÍý¤Î½é´ü¤Ë¹Ô¤ï¤ì¡¢ ¥È¥ì¡¼¥µ¤Ï¤É¤³¤Ç½ªÎ»¤¬È¯À¸¤·¤¿¤«¤òÃΤ뤳¤È¤¬¤Ç¤­¤ë¡£ Ä̾ï¤Î½ªÎ»ÄÌÃÎ (exit notification) ¤Ï¥×¥í¥»¥¹¤Î½ªÎ»½èÍý¤¬´°Î»¤·¤¿¸å¤Ë ¹Ô¤ï¤ì¤ë¡£¥³¥ó¥Æ¥­¥¹¥È¤ò»²¾È¤¹¤ë¤³¤È¤Ï¤Ç¤­¤ë¤Ë¤â´Ø¤ï¤é¤º¡¢ ¥È¥ì¡¼¥µ¤Ï¤³¤Î»þÅÀ¤«¤é½ªÎ»¤ò»ß¤á¤ë¤³¤È¤Ï¤Ç¤­¤Ê¤¤¡£

PTRACE_GETEVENTMSG (Linux 2.5.46 °Ê¹ß)

ȯÀ¸¤·¤¿¤Ð¤«¤ê¤Î ptrace ¥¤¥Ù¥ó¥È¤Ë´Ø¤¹¤ë¥á¥Ã¥»¡¼¥¸¤ò (unsigned long ·¿¤Ç) ¼èÆÀ¤¹¤ë¡£ ¼èÆÀ¤·¤¿¥á¥Ã¥»¡¼¥¸¤Ï¿Æ¥×¥í¥»¥¹¤Î data ¤Î°ÌÃ֤˳ÊǼ¤µ¤ì¤ë¡£ ÆÀ¤é¤ì¤ëÆâÍƤϡ¢PTRACE_EVENT_EXIT ¤Î¾ì¹ç¤Ï»Ò¥×¥í¥»¥¹¤Î½ªÎ»¥¹¥Æ¡¼¥¿¥¹¤Ç¤¢¤ê¡¢ PTRACE_EVENT_FORK, PTRACE_EVENT_VFORK, PTRACE_EVENT_CLONE ¤Î¾ì¹ç¤Ï ¿·¤·¤¤¥×¥í¥»¥¹¤Î PID ¤Ç¤¢¤ë¡£ Linux 2.6.18 °Ê¹ß¤Ç¤Ï¡¢¿·¤·¤¤¥×¥í¥»¥¹¤Î PID ¤Ï PTRACE_EVENT_VFORK_DONE ¤ÇÆþ¼ê¤Ç¤­¤ë¡£ (addr ¤Ï̵»ë¤µ¤ì¤ë¡£)

PTRACE_CONT

Ää»ß¤·¤¿»Ò¥×¥í¥»¥¹¤Î¼Â¹Ô¤òºÆ³«¤µ¤»¤ë¡£ data ¤¬¥¼¥í¤Ç¤Ê¤¯¡¢SIGSTOP ¤Ç¤â¤Ê¤±¤ì¤Ð¡¢ »Ò¥×¥í¥»¥¹¤ËÇÛÁ÷¤µ¤ì¤ë¥·¥°¥Ê¥ë¤È²ò¼á¤µ¤ì¤ë¡£ ¥¼¥í¤ä SIGSTOP ¤Î¾ì¹ç¤Ï¥·¥°¥Ê¥ë¤ÏÇÛÁ÷¤µ¤ì¤Ê¤¤¡£ ¤³¤ì¤ò»È¤¦¤È¡¢Î㤨¤Ð¡¢¿Æ¥×¥í¥»¥¹¤Ï »Ò¥×¥í¥»¥¹¤ËÁ÷¤é¤ì¤¿¥·¥°¥Ê¥ë¤ò¼ÂºÝ¤ËÇÛÁ÷¤¹¤ë¤«¤É¤¦¤«¤ò À©¸æ¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£(addr ¤Ï̵»ë¤µ¤ì¤ë¡£)

PTRACE_SYSCALL, PTRACE_SINGLESTEP

PTRACE_CONT ¤ÈƱÍͤËÄä»ß¤·¤¿»Ò¥×¥í¥»¥¹¤òºÆ³«¤¹¤ë¡£ ¤¿¤À¤·¡¢PTRACE_SYSCALL ¤Î¾ì¹ç¤Ï»Ò¥×¥í¥»¥¹¤¬ ¼¡¤Ë¥·¥¹¥Æ¥à¥³¡¼¥ë¤ËÆþ¤ë¤«¥·¥¹¥Æ¥à¥³¡¼¥ë¤«¤éÈ´¤±¤ë¤«¤¹¤ë»þ¤Ë¡¢ PTRACE_SINGLESTEP ¤Î¾ì¹ç¤Ï 1 Ì¿Îá (instruction) ¼Â¹Ô¤·¤¿¸å¤ËÄä»ß¤µ¤»¤ë (Ä̾ï¤É¤ª¤ê¡¢»Ò¥×¥í¥»¥¹¤Ï¥·¥°¥Ê¥ë¤ò¼õ¤±¼è¤Ã¤¿¾ì¹ç¤Ë¤âÄä»ß¤¹¤ë)¡£ ¿Æ¥×¥í¥»¥¹¤«¤é¸«¤ë¤È¡¢»Ò¥×¥í¥»¥¹¤Ï SIGTRAP ¤ò¼õ¿®¤·¤Æ Ää»ß¤·¤¿¤è¤¦¤Ë¸«¤¨¤ë¡£¤½¤Î¤¿¤á¡¢Î㤨¤Ð PTRACE_SYSCALL ¤ò»È¤¦¤È¡¢ 1²óÌܤÎÄä»ß¤Ç°ú¤­¿ô¤òÄ´¤Ù¤Æ PTRACE_SYSCALL ¤ò¼Â¹Ô¤·¡¢ 2²óÌܤÎÄä»ß¤Ç¥·¥¹¥Æ¥à¥³¡¼¥ë¤ÎÊÖ¤êÃͤòÄ´¤Ù¤ë¡¢ ¤È¤¤¤¦¤è¤¦¤Ê¤³¤È¤¬¤Ç¤­¤ë¡£(addr ¤Ï̵»ë¤µ¤ì¤ë¡£)

PTRACE_SYSEMU, PTRACE_SYSEMU_SINGLESTEP (Linux 2.6.14 °Ê¹ß)

PTRACE_SYSEMU ¤Ï¡¢¼Â¹Ô¤òºÆ³«¤·¡¢¼¡¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤ËÆþ¤ë»þ¤ËÄä»ß¤µ¤»¤ë¡£ ¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ï¼Â¹Ô¤µ¤ì¤Ê¤¤¡£ PTRACE_SYSEMU_SINGLESTEP ¤âƱÍͤÀ¤¬¡¢¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ç¤Ê¤¤¾ì¹ç¤Ë¤Ï 1 Ì¿Îá (singlestep) ¤À¤±¼Â¹Ô¤·¤¿»þÅÀ¤Ç¤âÄä»ß¤µ¤»¤ë¡£ ¤³¤Î¥³¡¼¥ë¤Ï User Mode Linux ¤Î¤è¤¦¤Ë»Ò¥×¥í¥»¥¹¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤òÁ´¤Æ ¥¨¥ß¥å¥ì¡¼¥È¤·¤è¤¦¤È¤¹¤ë¥×¥í¥°¥é¥à¤Ç»ÈÍѤµ¤ì¤ë¡£ (addr ¤È data ¤Ï̵»ë¤µ¤ì¤ë¡£ Á´¤Æ¤Î¥¢¡¼¥­¥Æ¥¯¥Á¥ã¤Ç¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤ë¤ï¤±¤Ç¤Ï¤Ê¤¤¡£)

PTRACE_KILL

»Ò¥×¥í¥»¥¹¤Ë SIGKILL ¤òÁ÷¤ê½ªÎ»¤µ¤»¤ë¡£(addr ¤È data ¤Ï ̵»ë¤µ¤ì¤ë¡£)

PTRACE_ATTACH

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