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Book: Debug Hacks
TOPICS Hacks , Programming , Linux , Ruby ç™ºè¡Œå¹´æœˆæ—¥ 2009å¹´04æœˆ PRINT LENGTH 424 ISBN 978-4-87311-404-0 FORMAT PDF ãƒŸãƒ©ã‚¯ãƒ«ãƒ»ãƒªãƒŠãƒƒã‚¯ã‚¹æ ªå¼ä¼šç¤¾ã®ç²¾é‹ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãŸã¡ãŒã€é•·å¹´ã®Linuxã‚«ãƒ¼ãƒãƒ«é–‹ç™ºã®çµŒé¨“ã§åŸ¹ã£ãŸãƒ‡ãƒãƒƒã‚°ãƒ†ã‚¯ãƒ‹ãƒƒã‚¯ã‚’è©³è§£ã€‚ã“ã“ã‚ãŒã¾ãˆã‹ã‚‰ã€æº–å‚™ã€å¿…è¦ãªçŸ¥è˜ã€ãƒã‚°ã®åŽŸå› ã‚’ã™ã°ã‚„ãç‰¹å®šã—ä¿®æ£ã™ã‚‹ãŸã‚ã«ä¾¿åˆ©ãªãƒ†ã‚¯ãƒ‹ãƒƒã‚¯ã¨ãƒ„ãƒ¼ãƒ«ã€é«˜åº¦ãªãƒ‡ãƒãƒƒã‚°æŠ€ã¾ã§æƒœã—ã¿ãªãæŠ«éœ²ã—ã¾ã™ã€‚å¤šãã®äº‹ä¾‹ã«åŸºã¥ã„ãŸå®Ÿéš›çš„å®Ÿç”¨çš„ãªæŠ€ãŒæº€è¼‰ã§ã™ã€‚åŠ¹çŽ‡è‰¯ãã‹ã¤ã‚¯ã‚ªãƒªãƒ†ã‚£ãƒ¼ã®é«˜ã„é–‹ç™ºã®ãŸã‚ã«å¿…é ˆã®ä¸€å†Šã§ã™ã€‚ Debug HacksæŽ¨è–¦ã®è¨€è‘‰ ãƒ—ãƒã‚°ãƒ©ãƒ ã«ã¯ãƒã‚°ãŒä»˜ãç‰©ã§ã™ã€‚ãƒã‚°ã¯äººé–“ã®äºˆæƒ³ã‚’è¶…ãˆãŸã¨ã“ã‚ã‹ã‚‰ã‚„ã£ã¦ãã¾ã™ã€‚ä¸–ç•Œæœ€åˆã®ãƒã‚°ã¯ã€ãƒªãƒ¬ãƒ¼å¼è¨ˆç®—æ©Ÿã®ä¸ã«ã¾ãŽã‚Œã“ã‚“ã è›¾ã ã£ãŸãã†ã§ã™ã€‚ã‚ã‚ã‚Œãƒªãƒ¬ãƒ¼ã®é–“ã«æŒŸã¾ã‚ŒãŸè›¾ã«
hiromark 2009/04/06
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straceã‚’ä½¿ã£ãŸãƒ‡ãƒãƒƒã‚° | OSDN Magazine
ãƒ—ãƒã‚°ãƒ©ãƒ ãŒæ©Ÿèƒ½ã‚’æžœãŸã›ãªã„å ´åˆã«ã¯ã€æœ‰ç”¨ãªã‚¨ãƒ©ãƒ¼ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã‚’è¿”ã—ã€å•é¡Œã‚’è§£æ±ºã™ã‚‹æ‰‹ãŒã‹ã‚Šã‚’æä¾›ã™ã‚‹ã®ãŒç†æƒ³çš„ã ã€‚ã—ã‹ã—æ®‹å¿µãªãŒã‚‰ã€ã“ã®ã‚ˆã†ãªç†æƒ³çš„ãªçŠ¶æ³ã¯çã—ãã€ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã§ã‚¨ãƒ©ãƒ¼ãŒç™ºç”Ÿã—ãŸã¨ãã«ã€æ‰‹å…ƒã«ä½•ã®æƒ…å ±ã‚‚ãªã„ã“ã¨ã‚‚å¤šã„ã€‚ ã“ã“ã§ã€ãƒ‡ãƒãƒƒã‚°ãƒ„ãƒ¼ãƒ«ã®ç™»å ´ã ã€‚ç§ã«ã¨ã£ã¦ãªãã¦ã¯ãªã‚‰ãªã„ãƒ„ãƒ¼ãƒ«ã®1ã¤ãŒã€straceã ã€‚straceã¯ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ãƒˆãƒ¬ãƒ¼ã‚µã§ã€ã™ã§ã«å®Ÿè¡Œã•ã‚Œã¦ã„ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã«ã‚ˆã£ã¦ç™ºã›ã‚‰ã‚ŒãŸã‚³ãƒ¼ãƒ«ã‚’è¿½è·¡ã™ã‚‹ï¼ˆstraceã‚’æ—¢å˜ã®PIDã«ãƒã‚¤ãƒ³ãƒ‰ã™ã‚‹ï¼‰ã“ã¨ã‚‚ã€ãƒ†ã‚¹ãƒˆã—ãŸã„ãƒ—ãƒã‚»ã‚¹ã‚’straceã«é–‹å§‹ã•ã›ã‚‹ã“ã¨ã‚‚ã§ãã‚‹ã€‚ ã§ã¯ã€straceã®ä½¿ã„æ–¹ã‚’å®Ÿä¾‹ã¨ã¨ã‚‚ã«è¦‹ã¦ã„ãã“ã¨ã«ã—ã‚ˆã†ã€‚ KDEèµ·å‹•æ™‚ã®å•é¡Œ ä»¥å‰ã€ç§ã¯KDEã‚’èµ·å‹•ã™ã‚‹éš›ã®å•é¡Œã‚’ãƒ‡ãƒãƒƒã‚°ã—ã¦ã„ãŸã€‚è¿”ã•ã‚ŒãŸã‚¨ãƒ©ãƒ¼ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã‹ã‚‰ã¯ã€ä½•ã®æ‰‹ãŒã‹ã‚Šã‚‚å¾—ã‚‹ã“ã¨ãŒã§ããªã‹ã£ãŸã€‚ _KDE_IceTransSocketCr
hiromark 2008/12/30
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Backtraces (The GNU C Library)
34.1 Backtraces A backtrace is a list of the function calls that are currently active in a thread. The usual way to inspect a backtrace of a program is to use an external debugger such as gdb. However, sometimes it is useful to obtain a backtrace programmatically from within a program, e.g., for the purposes of logging or diagnostics. The header file execinfo.h declares three functions that obtain
hiromark 2006/05/01
Backtrace ç³»ã®é–¢æ•°ã®èª¬æ˜Žã€‚

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gcc

linux

programming

debug
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IBM Developer
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
hiromark 2006/05/01
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Cã®ãƒ—ãƒã‚°ãƒ©ãƒ ã®ä¸ã§ãƒ–ãƒ¬ãƒ¼ã‚¯ãƒã‚¤ãƒ³ãƒˆã‚’è¨å®šã™ã‚‹ - bkãƒ–ãƒã‚°
Cã®ãƒ—ãƒã‚°ãƒ©ãƒ ã®ä¸ã§ãƒ–ãƒ¬ãƒ¼ã‚¯ãƒã‚¤ãƒ³ãƒˆã‚’è¨å®šã™ã‚‹ Cã®ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ãƒ‡ãƒãƒƒã‚°ã™ã‚‹éš›ã«ã¯ GDB ãªã©ã®ãƒ‡ãƒãƒƒã‚¬ãŒå½¹ç«‹ã¡ã¾ã™ã€‚é€šå¸¸ã€ãƒ–ãƒ¬ãƒ¼ã‚¯ãƒã‚¤ãƒ³ãƒˆã¯ãƒ‡ãƒãƒƒã‚¬ã®ä¸ã‹ã‚‰è¨å®šã—ã¾ã™ãŒã€ãƒ‡ãƒãƒƒã‚°å¯¾è±¡ã®Cã®ãƒ—ãƒã‚°ãƒ©ãƒ ã®ä¸ã§è¨å®šã™ã‚‹ã“ã¨ã‚‚ã§ãã¾ã™ã€‚ Linux ãªã‚‰ #include <signal.h> ã—ã¦ã€ä»»æ„ã®ç®‡æ‰€ã« raise(SIGTRAP); ã‚’æŒ¿å…¥ã™ã‚Œã° OK ã§ã™ã€‚ raise() é–¢æ•°ã‚’ç”¨ã„ã¦ SIGTRAP ã‚·ã‚°ãƒŠãƒ«ã‚’ç™ºç”Ÿã•ã›ã¦ã„ã¾ã™ã€‚ ã‚ã‚‹ã„ã¯ x86 é™å®šãªã‚‰ __asm__("int3"); ã§ã‚‚ OK ã§ã™ã€‚ã“ã“ã§ã¯ SIGTRAP ã‚’ç™ºç”Ÿã•ã›ã‚‹ãŸã‚ã« int3 (0xcc) å‘½ä»¤ã‚’åŸ‹ã‚è¾¼ã‚“ã§ã„ã¾ã™ã€‚GDB ã‚‚ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢çš„ã«ãƒ–ãƒ¬ãƒ¼ã‚¯ãƒã‚¤ãƒ³ãƒˆã‚’è¨å®šã™ã‚‹ã¨ãã¯å½“è©²ç®‡æ‰€ã« int3 ã‚’æ›¸ãè¾¼ã‚“ã§ã„ã‚‹ã®ã§ã€ã‚„ã£ã¦ã„ã‚‹ã“ã¨ã¯å‰²ã¨ä¼¼ã¦ã„ã¾ã™ (GDBã®å ´åˆã¯ int3 ã‚’æ›¸ãè¾¼ã‚€éƒ¨åˆ†ã®
hiromark 2006/02/06
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IBM Developer
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
hiromark 2006/01/31
Linux ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«ãŠã‘ã‚‹ãƒ‡ãƒãƒƒã‚°ã®ã‚„ã‚Šã‹ãŸãªã©ã€‚

linux

programming

debug

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æ™®é€šã®ã‚„ã¤ã‚‰ã®ä¸‹ã‚’è¡Œã‘: C ã§ãƒãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹è¡¨ç¤º æ™®é€šã®ã‚„ã¤ã‚‰ã®ä¸‹ã‚’è¡Œã‘ã®ç¬¬2å›žã¨ã—ã¦ã€ä»Šå›žã¯ glibc ã®é–¢æ•°ã‚’ä½¿ã£ã¦ C ã§ãƒãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹ (ã‚¹ã‚¿ãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹) ã®è¡¨ç¤ºã‚’è¡Œã£ã¦ã¿ã¾ã™ã€‚ ãƒãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹ã¨ã¯ ãƒãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹ã¨ã¯ã€å¤§ã–ã£ã±ã«è¨€ã†ã¨ã€ç¾åœ¨ã®é–¢æ•°ã«è‡³ã‚‹ã¾ã§ã®é“ç‹ã§ã™ã€‚ãŸã¨ãˆã°ã€æ¬¡ã® Ruby ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’å®Ÿè¡Œã™ã‚‹ã¨ã€ 1 / 0 ã®è¡Œã§ä¾‹å¤–ãŒç™ºç”Ÿã—ã¦ã€ãƒãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹ã®è¡¨ç¤ºã¨ã¨ã‚‚ã«ãƒ—ãƒã‚°ãƒ©ãƒ ã¯ç•°å¸¸çµ‚äº†ã—ã¾ã™ã€‚ def foo 1 / 0 end def main foo end main ã“ã®ä¾‹ã§ã¯ main ã‹ã‚‰ foo ã‚’å‘¼ã³ foo ã®ä¸ã® 1 / 0 ã®éƒ¨åˆ†ã§ä¾‹å¤–ãŒç™ºç”Ÿã—ã¦ã„ã¾ã™ã€‚ % ruby divide-by-zero.rb divide-by-zero.rb:2:in `/': divided by 0 (ZeroDivisionError) from div
hiromark 2005/10/25
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