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gccã«é–¢ã™ã‚‹maisenakajimaã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (7)

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Linuxå…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®ç°¡å˜ãªã¾ã¨ã‚ - wagavulinã®æ—¥è¨˜
Linuxã§å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªï¼ˆ*.soï¼‰ã‚’ä½œã‚‹ã‚ˆã†ã«ãªã£ãŸã®ã§ã¡ã‚‡ã£ã¨å‹‰å¼·ã—ã¦ã¿ãŸã€‚ä»Šã¾ã§ã¯ä½¿ã†ã ã‘ã ã£ãŸã®ã§ã€ä»¥ä¸‹ã®ã‚ˆã†ãªã“ã¨ã¯çŸ¥ã£ã¦ã„ãŸã€‚ä½œã‚‹ã¨ãã¯gccã®-sharedã‚ªãƒ—ã‚·ãƒ§ãƒ³ã‚’ä½¿ã†ã€‚ä½¿ã†ã¨ãã¯gccã®"-lãƒ©ã‚¤ãƒ–ãƒ©ãƒªå"ã§ãƒªãƒ³ã‚¯ã™ã‚‹ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’æŒ‡å®šã™ã‚‹ã€‚ãƒªãƒ³ã‚¯æ™‚ã®ãƒ©ã‚¤ãƒ–ãƒ©ãƒªæŽ¢ç´¢ãƒ‘ã‚¹ã¯-Lã‚ªãƒ—ã‚·ãƒ§ãƒ³ã§æŒ‡å®šã™ã‚‹ã€‚å®Ÿè¡Œæ™‚ã®ãƒ©ã‚¤ãƒ–ãƒ©ãƒªæŽ¢ç´¢ãƒ‘ã‚¹ã¯/etc/ld.so.confã«æ›¸ã„ã¦ã‚ã‚‹ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã€‚ç’°å¢ƒå¤‰æ•°LD_LIBRARY_PATHã§ã‚‚æŒ‡å®šå¯èƒ½ã€‚ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’ä½œã‚‹ã¨ãã¯ã€.cã‹ã‚‰.oã‚’ä½œã‚‹ã¨ãã«-fPICã‚’ã¤ã‘ã‚‹ã¨ã„ã„ã‚‰ã—ã„ã€‚æ–°ã—ããƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’å…¥ã‚ŒãŸã¨ãã¯ldconfigã™ã‚‹ã¨ã„ã„ã‚‰ã—ã„ã€‚é€†ã«ä»Šã¾ã§ã‚ã¾ã‚ŠçŸ¥ã‚‰ãªã‹ã£ãŸã“ã¨ã€‚ã»ã¨ã‚“ã©ã®ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã¯libhoge.so, libhoge.so.1, libhoge.so.1.1ã®ã‚ˆã†ã«3ã¤ãã‚‰ã„ã®ãƒ•ã‚¡ã‚¤ãƒ«ãŒã‚ã‚Šã€libhoge.soã‚„libh
maisenakajima 2014/10/12
linux

library

gcc

å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒª

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°

programming
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C++11ã®ãŸã‚ã«GCCã®æœ€æ–°ç‰ˆã‚’ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã™ã‚‹
æœ€è¿‘The C++ Programming Language (4th Edition)ã‚’èªã‚“ã§ã„ã¾ã™ï¼Ž ã“ã‚Œã¯æœ€æ–°ã®C++11ã«æº–æ‹ ã—ãŸæ¨©å¨ã‚ã‚‹ï¼ˆåˆ†åŽšã„ï¼‰è§£èª¬æ›¸ã§ã™ï¼Ž C++ã¯ã¡ã‚‡ã¨ãŸã—ãªã‚€ç¨‹åº¦ã§ã—ãŸãŒï¼Œã“ã‚Œã‚’æ°—ã«çœŸé¢ç›®ã«å‹‰å¼·ã—ã¦ã¿ã‚ˆã†ã¨æ€ã„ã¾ã™ï¼Ž å‹‰å¼·ã®ãŸã‚ã«Ubuntuä¸Šã§C++11ã®é–‹ç™ºã‚’è¡Œãˆã‚‹ã‚ˆã†ç’°å¢ƒè¨å®šã‚’ã—ã¾ã—ãŸã®ã§ï¼Œãã®å·¥ç¨‹ã‚’ã¾ã¨ã‚ã¦ãŠãã¾ã™ï¼Ž æƒ³å®šã—ã¦ã„ã‚‹ç’°å¢ƒã¯ä»¥ä¸‹ã®ã‚ˆã†ã«ãªã‚Šã¾ã™ï¼Ž OS Ubuntu 12.04 LTS 32bit GCC 4.8.1 å‚è€ƒã«ã—ãŸã‚µã‚¤ãƒˆ UbuntuHandbook 1.GCCã¨G++ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ç¢ºèª ã¾ãšã¯ç¾åœ¨ã®è‡ªåˆ†ã®ç’°å¢ƒã‚’ç¢ºèªã—ã¾ã™ï¼Ž ãƒ»ç¾åœ¨ã®GCCã¨G++ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚’ç¢ºèªã—ã¾ã™ï¼Ž $ gcc --version $ g++ --version ç§ã®ç’°å¢ƒã§ã¯ï¼Œä»¥ä¸‹ã®ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸï¼Ž gcc (Ubuntu/Linaro 4.6.3
maisenakajima 2014/06/28
Ubuntuä¸Šã§C++11ã®é–‹ç™ºã‚’è¡Œãˆã‚‹ã‚ˆã†ã«ç’°å¢ƒè¨å®šã€‚OS:Ubuntu 12.04 LTS 32bitã€GCC:4.8.1

gcc

Ubuntu

Linux

é–‹ç™º

ç’°å¢ƒæ§‹ç¯‰

C++

C++11
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å®Ÿè¡Œæ™‚ã®é–¢æ•°å…¨ã¦ã® in/out ã‚’ãƒˆãƒ¬ãƒ¼ã‚¹ã™ã‚‹ - Qiita
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maisenakajima 2014/04/27
ãƒã‚¤ãƒ³ãƒˆã¯ã€ -finstrument-functions ã€‚é–¢æ•°ã® in/out ã§æŒ‡å®šã—ãŸé–¢æ•°ã‚’å‘¼ã¶ã€ã¨ã„ã†ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã€‚in ã®ã¨ãã«ã‚„ã‚ŠãŸã„å‡¦ç†ã‚’ __cyg_profile_func_enter ã«ã€out ã®ã¨ãã«ã‚„ã‚ŠãŸã„å‡¦ç†ã‚’ __cyg_profile_func_exit ã«è¨˜è¼‰ã™ã‚‹ã€‚

c++

gcc

Linux

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°

programming

debug
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DWARF ã®è¡Œæƒ…å ±ã‚’èªã‚€ - å…¼é›‘è¨˜
ãªã‚“ã‹è¡Œæƒ…å ±èªã‚€ã¨ã‹ãã„ã†è©±é¡ŒãŒ twitter ã«ã‚ã£ãŸã®ã§ã€é©å½“ã«ä½œã£ã¦ã‚ã£ãŸã®ã§ãªã‚“ã‹æ›¸ã„ã¦ã¿ã‚‹ã€‚ http://github.com/shinh/test/blob/master/addr2line.cc DWARF æƒ…å ±ã¤ã‘ã‚‹ã¨ (ä»Šã® GCC ã ã¨ -g ã§ã¤ãã¨æ€ã†) ã‚¢ãƒ‰ãƒ¬ã‚¹ã‹ã‚‰ã‚³ãƒ¼ãƒ‰ã®åå‰ã‚’è¡Œç•ªå·ã‚’ã²ã‘ã‚‹ã‚ˆã†ã«ãªã‚‹ã‚“ã ã‘ã©ã€ã¾ããã®æƒ…å ±ã‚’ãƒ—ãƒã‚°ãƒ©ãƒ ã‹ã‚‰èªã‚€ã¨ã„ã†è©±ã€‚ ã¾ãšã©ã“ã«æ ¼ç´ã•ã‚Œã¦ã‚‹ã‹ã£ã¦ã„ã†ã¨ã€ .debug_line ã£ã¦ã„ã†ã‚»ã‚¯ã‚·ãƒ§ãƒ³ã«å…¥ã£ã¦ã„ã‚‹ã®ã§ã€ãã‚Œã‚’æŽ¢ã™å¿…è¦ãŒã‚ã‚‹ã€‚ä¸Šã®ãƒ—ãƒã‚°ãƒ©ãƒ ã§è¨€ã†ã¨ main ã®ä¸ã€‚å…ˆé ã«ã‚ã‚‹ ELF ãƒ˜ãƒƒãƒ€ã‚’èªã‚“ã§ã‚»ã‚¯ã‚·ãƒ§ãƒ³ãƒ˜ãƒƒãƒ€ã®é–‹å§‹ä½ç½®ã¨ã‚»ã‚¯ã‚·ãƒ§ãƒ³åã®æ ¼ç´ã•ã‚Œã¦ã‚‹ .shstrtab ã®ä½ç½®ã‚’æ•™ãˆã¦ã‚‚ã‚‰ã£ã¦ã€ .shstrtab ã®æƒ…å ±ã‚’å‚è€ƒã«ã—ã¦ .debug_info ã®ä½ç½®ã‚’ç‰¹å®šã™ã‚‹ã€‚ .debug_line ã®ä¸èº«ã¯
maisenakajima 2014/03/08
gcc

linux

debug

programming

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
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å¿˜ã‚Œãªã„ã†ã¡ã«ãƒ¡ãƒ¢ Linuxã§æ™®é€šã«å®Ÿè¡Œãƒ•ã‚¡ã‚¤ãƒ«ã¤ãã‚‹ã¨.commentã‚»ã‚¯ã‚·ãƒ§ãƒ³ã¨ãƒ‡ãƒãƒƒã‚°ã‚¤ãƒ³ãƒ•ã‚©ãƒ¡ãƒ¼ã‚·ãƒ§ãƒ³ã® äºŒç®‡æ‰€ã«ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ãŒå…¥ã£ã¦ã‚‹ã€‚ã“ã‚Œã¯objdumpã‚„readelfã§è¦³æ¸¬ã§ãã‚‹ã€‚ ãªãœã“ã‚“ãªãƒ†ã‚¯ãƒ‹ãƒƒã‚¯ã‚’çŸ¥ã‚‹å¿…è¦ãŒã‚ã‚‹ã‹ã¨ã„ã†ã¨ãƒã‚°å ±å‘Šã§å˜˜ã®ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚’ å ±å‘Šã—ã¦ãã‚‹è¼©ã¯ã‘ã—ã¦ãƒ¬ã‚¢ã§ã¯ãªã„ã‹ã‚‰ã§ã‚ã‚‹ ï¼‘ã¤ã‚ã€‚.comment ã‚»ã‚¯ã‚·ãƒ§ãƒ³ã‚’ objdumpã§è¡¨ç¤º % objdump -s -j .comment a.out a.out: file format elf64-x86-64 Contents of section .comment: 0000 4743433a 2028474e 55292034 2e342e36 GCC: (GNU) 4.4.6 0010 20323031 32303330 35202852 65642048 2012030
maisenakajima 2013/12/23
.comment ã‚»ã‚¯ã‚·ãƒ§ãƒ³ã‚’ objdumpã§è¡¨ç¤ºã™ã‚‹ã€‚ objdump -s -j .comment a.out

gcc

linux

objdump
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GCCã§Intel Syntaxãªã‚¢ã‚»ãƒ³ãƒ–ãƒªã‚³ãƒ¼ãƒ‰ã‚’å‡ºåŠ› - // TODO: better name
gcc -S -masm=intel objdumpã¨ã‹ã‚‚å¯¾å¿œã—ã¦ã‚‹ã®ã‹ãªï¼Ÿ èª¿ã¹ã¦ã¿ã‚‹ã€‚ è¿½è¨˜ objdump -M intel -S ã§ã§ãã‚‹ã£ã½ã„ã€‚ã“ã‚Œã¯ä¾¿åˆ©ã€‚
maisenakajima 2013/12/18
objdumpã§ã‚‚ã§ãã‚‹ã€‚

intel

gcc
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ã‚·ã‚¹ãƒ†ãƒ ãƒ‡ãƒ¼ã‚¿åž‹ãªã©typedefã•ã‚ŒãŸåž‹ã®å®Ÿéš›ã®åž‹ã‚’èª¿ã¹ã‚‹ - Pistolfly
gdbã®ptypeã‚’ä½¿ã†ã®ãŒç°¡å˜ã€‚ ä¾‹ãˆã°ã€ä»¥ä¸‹ã®foo.cã€‚ #include <sys/types.h> struct st { int i; char c; }; typedef int Array[10]; typedef struct st St; int main(void) { size_t s1; ssize_t s2; pid_t pid; Array arr; St st1; return 0; } $ gcc -Wall -g -o foo foo.c $ gdb foo (gdb) b main (gdb) run (gdb) ptype s1 type = long unsigned int (gdb) ptype size_t type = long unsigned int (gdb) ptype s2 type = long int (gdb) ptype
maisenakajima 2013/12/07
gdbã®ptypeã‚³ãƒžãƒ³ãƒ‰ã‚’ä½¿ç”¨ã™ã‚‹ã€ã‚‚ã—ãã¯ã€gccã®-Eã‚ªãƒ—ã‚·ãƒ§ãƒ³ã‚’æŒ‡å®šã—ã¦å®Ÿè¡Œã™ã‚‹ã€‚

linux

c

gdb

gcc
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