[B! gdb] udzuraã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

udzura id:udzura

gdbã«é–¢ã™ã‚‹udzuraã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (10)

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gdb tips - bkãƒ–ãƒã‚°
gdb tips gdb ã‚’ä½¿ã†ä¸Šã§ä¾¿åˆ©ãª tips ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚åŸºæœ¬çš„ãªä½¿ã„æ–¹ã‚’ãƒžã‚¹ã‚¿ãƒ¼ã—ã¦ã„ã‚‹äººå‘ã‘ã§ã™ã€‚ .gdbinit ã®è¨å®š ãƒ›ãƒ¼ãƒ ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã« .gdbinit ã‚’ç½®ã„ã¦ãŠãã¨ã€gdb ã®èµ·å‹•ã®éš›ã«èªã¿è¾¼ã¾ã‚Œã¾ã™ã€‚ç§ã®å ´åˆã¯æ¬¡ã®ã‚ˆã†ãªè¨å®šã‚’ã—ã¦ã„ã¾ã™ã€‚ set history save on set history size 10000 set history filename ~/.gdb_history set print pretty on set print static-members off set charset ASCII set history ã‹ã‚‰å§‹ã¾ã‚‹æœ€åˆã® 3è¡Œã¯å±¥æ´ã«é–¢ã™ã‚‹è¨å®šã§ã™ã€‚ãã‚Œãžã‚Œã€ gdb ã®ã‚³ãƒžãƒ³ãƒ‰ãƒ©ã‚¤ãƒ³ã®å±¥æ´ã‚’ãƒ•ã‚¡ã‚¤ãƒ«ã«ä¿å˜ã™ã‚‹ã€ä¿å˜ã™ã‚‹è¡Œã¯æœ€å¤§ 10000 è¡Œã€ãƒ•ã‚¡ã‚¤ãƒ«åã¯ ~/.gdb_history ã€ã¨ã„ã†æ„å‘³ã«ãªã‚Šã¾ã™ã€‚
udzura 2018/08/02
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gdb
ãƒªãƒ³ã‚¯
ubuntu xenialã§netnsã®è¿½åŠ å‡¦ç†ã‚’40å€æ—©ãã™ã‚‹ | ten-snapon.com
udzura 2018/04/06
æ‰‹é †ã‚‚ã‚ã‹ã‚Šã‚„ã™ãã¦ã„ã„è©±ã

gdb

linux
ãƒªãƒ³ã‚¯
SEGVæŽ¢åµãŒå¾€ã - ãªã‚‹ã›ã«ã£ã
äººã¯èª°ã—ã‚‚108ã¤ã®å¤¢ã‚’æŒã¤ã¨è¨€ã„ã¾ã™ãŒã€èªè€…ã®çš†ã•ã‚“ã«ã‚‚æŽ¢åµã‚’å¤¢è¦‹ãŸäººã¯å¤šã„ã“ã¨ã§ã—ã‚‡ã†ã€‚å®Ÿéš›å•é¡Œã¨ã—ã¦æŽ¢åµæ¥ã‚’ã‚„ã‚ã†ã¨æ€ã£ãŸã‚‰åœ°é“ãªèžãè¾¼ã¿ï¼†å¼µã‚Šè¾¼ã¿ã®æ—¥ã€…ã§ã—ã‚‡ã†ã—ã€é€†ã«æ´¾æ‰‹ãªæŽ¢åµæ¥ã¯é™°è¬€ï¼†æ®ºäººã§æã‚ã—ã„ã€‚ã‚ãŸã—ã‚‚è‡ªåˆ†ã®å‘½ã¯å¤§äº‹ã§ã™ã‹ã‚‰ã©ã†ã™ã‚‹ã‹ã€‚ãã†ã€æŽ¢åµã”ã£ã“ã‚’ã™ã‚‹ã‚ã‘ã§ã™ãã€‚ ã¨ã„ã†ã‚ã‘ã§SEGVæŽ¢åµã§ã™ã€‚æ»ã¬ã®ã¯ãƒ—ãƒã‚»ã‚¹ãªã®ã§å®‰å¿ƒã€‚Rubyã‚’ä½¿ã£ã¦ã„ã‚Œã°SEGVãªã‚“ã¦è¦‹æ…£ã‚ŒãŸã‚‚ã®ã§ã™ãŒã€ã„ã–æœæŸ»ã—ã‚ˆã†ã¨æ€ã†ã¨æ„å¤–ã¨ãã®è¾ºã«ã¯è»¢ãŒã£ã¦ã„ãªã„ã‚‚ã®ã€‚ï¼ˆã‚€ã‹ã—ã¯ã¤ã‹ã¿å–ã‚Šå‡ºæ¥ã‚‹ãã‚‰ã„ã„ãŸãã†ã§ã™ã‚ˆï¼‰ã¨ã¯ã„ãˆä»Šã§ã‚‚ã„ã‚ã‚†ã‚‹ã€Œãƒã‚°é‰±è„ˆã€ã¿ãŸã„ãªã‚‚ã®ã¯ã‚ã‚Šã¾ã—ã¦ã€ãã®ä¸€ã¤ãŒã€Œæœ€æ–°ã®ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã§ãƒ“ãƒ«ãƒ‰ã—ã¦ã¿ã‚‹ã€ã§ã™ã€‚ ä»Šæ—¥ã¯GCCã®é–‹ç™ºç‰ˆã§ã‚ã‚‹GCC8ã‚’è©¦ã—ã¦ã¿ã¾ã—ã‚‡ã†ã€‚FreeBSDã ã¨sudo pkg install lang/gcc8-develã§ç°¡å˜ã«å…¥ã‚Œã‚‰ã‚Œã‚‹ã®ã§ã™ãŒã€ä»–ã®ç’°å¢ƒã ã¨
udzura 2017/09/03
ä¾¿åˆ©ã¾ã¨ã‚ã€Tipsã

gcc

gdb
ãƒªãƒ³ã‚¯
ãƒ¡ã‚¤ãƒ³ãƒšãƒ¼ã‚¸ - ã‚¸ã‚§ã‚¤ãƒ”ãƒ¼ã‚¢ãƒ¼ã‚¯ãƒªãƒŠãƒƒã‚¯ã‚¹
ã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã¯ã€ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ã®ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ç®¡ç†ã€ãƒ•ã‚¡ã‚¤ãƒ«ç®¡ç†ã€ãƒ‡ãƒ¼ã‚¿ã®å…¥å‡ºåŠ›ã¨ç®¡ç†ã€ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ãƒ—ãƒã‚°ãƒ©ãƒ ã‚„ãƒ¦ãƒ¼ãƒ†ã‚£ãƒªãƒ†ã‚£ã®å®Ÿè¡Œã€ãƒ¦ãƒ¼ã‚¶ãƒ¼ã¨ã®å¯¾è©±ãªã©ã‚’åŠ¹çŽ‡çš„ã«è¡Œã†ãŸã‚ã®åˆ¶å¾¡ãƒ»å‡¦ç†ãƒ—ãƒã‚°ãƒ©ãƒ ã®åŸºæœ¬ã‚»ãƒƒãƒˆã§ã™ã€‚
udzura 2017/05/18
ngx_mrubyã®systemçµŒç”±ã®ã‚³ãƒžãƒ³ãƒ‰ã®ã‚³ã‚¢ãƒ€ãƒ³ãƒ—ã‚‚ã‚ã‹ã£ãŸ

gdb

systemd
ãƒªãƒ³ã‚¯
ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ãŒæ¢ã¾ã£ãŸã‚Šè½ã¡ãŸã‚Šã—ãŸçŠ¶æ…‹ã‚’gdbã§è§£æžã™ã‚‹ - åƒé‡Œéœ§ä¸
ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ãŒãƒ‡ãƒƒãƒ‰ãƒãƒƒã‚¯ã‚„ç„¡é™ãƒ«ãƒ¼ãƒ—ç‰ã§å¿œç”ã—ãªããªã£ãŸã‚Šã€Segmentation Faultç‰ã§å¼·åˆ¶çµ‚äº†ã—ãŸã‚Šã™ã‚‹å ´åˆã§ã®ã€gdbã‚’ä½¿ã£ãŸè§£æžæ‰‹æ³•ã«ã¤ã„ã¦ç°¡å˜ãªã¾ã¨ã‚ã€‚ ãªãŠä»Šå›žã®å†…å®¹ã¯unixã‚„linuxé–‹ç™ºã§ã®åŸºæœ¬çŸ¥è˜ã¨ãªã£ã¦ã„ã‚‹ã¨æ€ã†ã‘ã‚Œã©ã€ä¾‹ãˆã°çµ„ã¿è¾¼ã¿linuxé–‹ç™ºãªã©ã§ã¯æ´»ç”¨ã§ãã‚‹ã®ã‚’çŸ¥ã‚‰ãšã«ã€printfãƒ‡ãƒãƒƒã‚°ã§é ‘å¼µã£ã¦ã„ã‚‹æ‰€ãŒçµæ§‹ã‚ã‚‹ã‚ˆã†ã ã€‚é–‹ç™ºãŒæ¥½ã«ãªã‚‹ã®ã§åŸºç¤Žã¨ã—ã¦çŸ¥ã£ã¦ãŠã„ã¦æã¯ãªã„ã¨æ€ã†ã€‚ ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ãŒè½ã¡ã‚‹çŠ¶æ…‹ã®è§£æž ã¾ãšä¾‹å¤–ç™ºç”Ÿãªã©ã§ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ãŒç•°å¸¸çµ‚äº†ã™ã‚‹å ´åˆã®è§£æžã«ã¤ã„ã¦ã€‚ ä¾‹ãˆã°ä»¥ä¸‹ã®ã‚³ãƒ¼ãƒ‰ã‚’å®Ÿè¡Œã™ã‚‹ã¨ã€ãƒ¡ãƒ¢ãƒªã‚¢ã‚¯ã‚»ã‚¹ã‚¨ãƒ©ãƒ¼ã§ç•°å¸¸çµ‚äº†ã™ã‚‹ã€‚ //main.c void hoge1(void) { int *hoge = (int *)0xDEADBEEF; hoge[0] = 100; } void hoge2(void) { hoge1();
udzura 2017/05/08
gdb
ãƒªãƒ³ã‚¯
Run a program transparently, but print a stack trace if it fails Using gdb, grep
Run a program transparently, but print a stack trace if it fails gdb -batch -ex "run" -ex "bt" ${my_program} 2>&1 | grep -v ^"No stack."$ For automated unit tests I wanted my program to run normally, but if it crashed, to add a stack trace to the output log. I came up with this command so I wouldn't have to mess around with core files. The one downside is that it does smoosh your program's stderr
udzura 2017/02/20
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gdb

debug
ãƒªãƒ³ã‚¯
GitHub - longld/peda: PEDA - Python Exploit Development Assistance for GDB
Enhance the display of gdb: colorize and display disassem bly codes, registers, memory information during debugging. Add commands to support debugging and exploit development (for a full list of commands use peda help): aslr -- Show/set ASLR setting of GDB checksec -- Check for various security options of binary dumpargs -- Display arguments passed to a function when stopped at a call instruction d
udzura 2017/01/17
ã“ã‚Œã‹ï¼ãªã‚“ã ã“ã‚Œã™ã”ã„

gdb

python
ãƒªãƒ³ã‚¯
Debugging Go Code with GDB - The Go Programming Language
The following instructions apply to the standard toolchain (the gc Go compiler and tools). Gccgo has native gdb support. Note that Delve is a better alternative to GDB when debugging Go programs built with the standard toolchain. It understands the Go runtime, data structures, and expressions better than GDB. Delve currently supports Linux, OSX, and Windows on amd64. For the most up-to-date list o
udzura 2014/09/12
ã¡ã‚ƒã‚“ã¨Goã®é–¢æ•°åã§å¼•ã£æŽ›ã‘ã‚‰ã‚Œã‚‹ã®ã‹ã€‚ã¡ã‚ƒã‚“ã¨è¦šãˆã‚ˆã†...

gdb

golang
ãƒªãƒ³ã‚¯
ã¯ã˜ã‚ã¦ã®gdbãƒ‡ãƒãƒƒã‚° | blog: takahiro okumura
ä»•äº‹ã§agã‚’åˆ©ç”¨ã—ã¦ã„ãŸæ™‚ã«å‡ºä¼šã£ãŸãƒã‚°ã‚’ã€å…ˆè¼©ãŸã¡ã®åŠ›ã‚’å€Ÿã‚Šã¦ãªã‚“ã¨ã‹ã—ãŸè©±ã§ã™ã€‚ å…ˆã«çµè«–ã‚’æ›¸ãã¨ã€æ¥å‹™ã«ç”¨ã„ã¦ã„ãŸagã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ãŒå¤ã„ã®ãŒåŽŸå› ã®ã‚ˆã†ã§ã—ãŸã€‚version 0.15ã‚ˆã‚Šå¤ã„ã¨lockã®å®Ÿè£…ã«å•é¡ŒãŒã‚ã‚‹ã‚ˆã†ã§ã™ã€‚ ä»¥ä¸‹ã€å•é¡Œã®ç™ºè¦šã‹ã‚‰ãªã‚“ã¨ã‹ã™ã‚‹ã¾ã§ã®è¨˜éŒ²ã§ã™ã€‚ ç™ºç«¯ agãŒé€”ä¸ã§æ¢ã¾ã‚‹ æ™‚æŠ˜ã€agã®ãƒ•ã‚¡ã‚¤ãƒ«æ“ä½œãŒå…ˆã¸é€²ã¾ãªããªã£ã¦ã—ã¾ã†ä¸å…·åˆãŒã‚ã‚Šã¾ã—ãŸã€‚ æ“ä½œä¸ã«å¯¾è±¡ãƒ•ã‚¡ã‚¤ãƒ«ã®ãƒãƒƒã‚¯çŠ¶æ³ãŒå¤‰ã‚ã‚‹ã¨ãƒ‡ãƒƒãƒ‰ãƒãƒƒã‚¯ãŒç™ºç”Ÿã—ã¦ã„ã‚‹ã®ã§ã¯ï¼Ÿã¨æƒ³åƒã€‚ æ°—ã«ãªã£ã¦straceã§ãƒ—ãƒã‚»ã‚¹ã«ã‚¢ã‚¿ãƒƒãƒã™ã‚‹ã¨ã€ä»¥ä¸‹ã§åœæ¢ã—ã¦ã„ã‚‹ã“ã¨ãŒåˆ†ã‹ã‚Šã¾ã—ãŸã€‚ [pid 4589] futex(0x80517e4, FUTEX_WAIT, 32159, NULL FUTEX_WAIT futex(2)ã‚’å¼•ãã¨ã€futex(2)ã®æ›¸å¼ã«å¯¾ã™ã‚‹æ“ä½œFUTEX_WAITã®èª¬æ˜ŽãŒã‚ã‚Šã¾ã™ã€‚
udzura 2013/12/24
gdbãƒžã‚¹ã‚¿ãƒ¼ã®è‹¥è€…ã

gdb

debug
ãƒªãƒ³ã‚¯
monit 5.4 ã®ãƒã‚° - ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ã§fork(2)ã—ã¦ãƒ‡ãƒƒãƒ‰ãƒãƒƒã‚¯ - hibomaã®æ—¥è¨˜
ãƒ—ãƒãƒ€ã‚¯ã‚·ãƒ§ãƒ³ç’°å¢ƒã§ä½¿ç”¨ã—ã¦ã„ãŸ monit 5.4 ãŒãƒ‡ãƒƒãƒ‰ãƒãƒƒã‚¯ã‚’èµ·ã“ã—ã¦ã„ãŸã®ã§èª¿æŸ»ã‚’ã—ã¦ã„ã¾ã—ãŸã€‚ãªãŠã€æœ¬ã‚¨ãƒ³ãƒˆãƒªã§è¨˜è¿°ã•ã‚Œã¦ã„ã‚‹ãƒã‚°ã¯ monit 5.5 ã§ä¿®æ£ã•ã‚Œã¦ã„ã¾ã™ è¦ç´„ é•·ã„å†…å®¹ãªã®ã§æœ€åˆã«ã¾ã¨ã‚ã¦ãŠãã¨ monit ã¯ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã§ã‚ã‚‹ monit 5.4 ã«ã¯ fork(2) å¾Œã« localtime_r(3) ã‚’å‘¼ã³å‡ºã™å‡¦ç†ãŒã‚ã‚Šã€ã“ã‚Œã‚‰ãŒç¨€ã«ãƒ‡ãƒƒãƒ‰ãƒãƒƒã‚¯ã‚’å¼•ãèµ·ã“ã™ monit 5.5 ç³»ã§ã¯ fork(2) å‰ã« å¤‰æ›´ã•ã‚ŒãŸã€‚ /usr/bin/gstack ã¯ä¾¿åˆ©ãƒ„ãƒ¼ãƒ« ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ + fork(2) ã§ãƒ‡ãƒƒãƒ‰ãƒãƒƒã‚¯ã™ã‚‹ãƒ‘ã‚¿ãƒ¼ãƒ³ã«è¦è¦æ³¨æ„ ã“ã‚Œã‚‰ã®å†…å®¹ã«èˆˆå‘³ãŒã‚ã‚‹æ–¹ã¯èªã¿é€²ã‚ã¦ã„ãŸã ã‘ã‚Œã° ... å•é¡Œã«ãªã£ãŸ monit ãƒ—ãƒã‚»ã‚¹ã®é‹ç”¨ã«ã¤ã„ã¦ è©²å½“ã® monit ã¯ å®šæœŸçš„ã«ç›£è¦–ãƒ—ãƒã‚»ã‚¹ã‚’å†èµ·å‹•ã™ã‚‹å½¹å‰²ã§ä½¿ã‚ã‚Œã¦ã„ã¾ã™ã€‚å†èµ·å‹•ã‚’ã™
udzura 2013/12/20
monit

fork

gdb
ãƒªãƒ³ã‚¯
1