Debugging with GDB: Print Settings

8.7 É½¼¨ÀßÄê

GDB¤Ï¡¢ ÇÛÎó¡¢ ¹½Â¤ÂÎ¡¢ ¥·¥ó¥Ü¥ë¤ò¤É¤Î¤è¤¦¤ËÉ½¼¨¤¹¤ë¤«¤òÀ©¸æ¤¹¤ë¤¿¤á¤ÎÊýË¡¤òÄó¶¡¤·¤Æ¤¤¤Þ¤¹¡£

set print address

set print address on

¤³¤ì¤Ë¤è¤êGDB¤Ï¡¢ ¥á¥â¥ê¡¦¥¢¥É¥ì¥¹¤ÎÆâÍÆ¤òÉ½¼¨¤¹¤ë¾ì¹ç¤Ç¤â¡¢ ¥¹¥¿¥Ã¥¯¡¦¥È¥ì¡¼¥¹¡¢ ¹½Â¤ÂÎ¤ÎÃÍ¡¢ ¥Ý¥¤¥ó¥¿¤ÎÃÍ¡¢ ¥Ö¥ì¥¤¥¯¥Ý¥¤¥ó¥È¤Ê¤É¤Î°ÌÃÖ¤ò¼¨¤¹¥¢¥É¥ì¥¹¤òÉ½¼¨¤·¤Þ¤¹¡£ ¥Ç¥Õ¥©¥ë¥È¤Ïon¤Ç¤¹¡£ Îã¤È¤·¤Æ¡¢ set print address on¤Î¤È¤¤Î¥¹¥¿¥Ã¥¯¡¦¥Õ¥ì¡¼¥à¤ÎÉ½¼¨·ë²Ì¤ò¼¨¤·¤Þ¤¹¡£

(gdb) f
#0  set_quotes (lq=0x34c78 "<<", rq=0x34c88 ">>")
    at input.c:530
530         if (lquote != def_lquote)

set print address off

¥¢¥É¥ì¥¹¤ÎÆâÍÆ¤òÉ½¼¨¤¹¤ë¤È¤¤Ë¤Ï¡¢ ¤½¤Î¥¢¥É¥ì¥¹¤òÉ½¼¨¤·¤Þ¤»¤ó¡£ Îã¤¨¤Ð¡¢ set print address off¤Î¤È¤¤ËÁ°¤ÎÎã¤ÈÆ±°ì¤Î¥¹¥¿¥Ã¥¯¡¦¥Õ¥ì¡¼¥à¤òÉ½¼¨¤¹¤ë¤È¡¢ °Ê²¼¤Î¤è¤¦¤Ë¤Ê¤ê¤Þ¤¹¡£

(gdb) set print addr off
(gdb) f
#0  set_quotes (lq="<<", rq=">>") at input.c:530
530         if (lquote != def_lquote)

‘set print address off’¤ò»ÈÍÑ¤¹¤ë¤³¤È¤Ç¡¢ GDB¤Î¥¤¥ó¥¿¡¼¥Õ¥§¥¤¥¹¤«¤é¥Þ¥·¥ó¤Ë°ÍÂ¸¤¹¤ëÉ½¼¨¤ò¼è¤ê½ü¤¯¤³¤È¤¬¤Ç¤¤Þ¤¹¡£ Îã¤¨¤Ð¡¢ print address off¤ò»ØÄê¤·¤Æ¤¢¤ì¤Ð¡¢ ¥Ý¥¤¥ó¥¿°ú¿ô¤ÎÍÌµ¤Ë¤«¤«¤ï¤é¤º¡¢ ¤¹¤Ù¤Æ¤Î¥Þ¥·¥ó¾å¤Ë¤ª¤¤¤ÆÆ±°ì¤Î¥Ð¥Ã¥¯¥È¥ì¡¼¥¹¾ðÊó¤òÆÀ¤ë¤Ï¤º¤Ç¤¹¡£

show print address

¥¢¥É¥ì¥¹¤¬É½¼¨¤µ¤ì¤ë¤«ÈÝ¤«¤ò¼¨¤·¤Þ¤¹¡£

set print symbol-filename on: ¥·¥ó¥Ü¥ê¥Ã¥¯¤Ê·Á¼°¤Î¥¢¥É¥ì¥¹¤ÎÉ½¼¨¤Ë¤ª¤¤¤Æ¡¢ ¤½¤Î¥·¥ó¥Ü¥ë¤Î¥½¡¼¥¹¡¦¥Õ¥¡¥¤¥ëÌ¾¤È¹ÔÈÖ¹æ¤òÉ½¼¨¤¹¤ë¤è¤¦GDB¤ËÄÌÃÎ¤·¤Þ¤¹¡£
set print symbol-filename off: ¥·¥ó¥Ü¥ë¤Î¥½¡¼¥¹¡¦¥Õ¥¡¥¤¥ëÌ¾¤È¹ÔÈÖ¹æ¤òÉ½¼¨¤·¤Þ¤»¤ó¡£¤³¤ì¤¬¥Ç¥Õ¥©¥ë¥È¤Ç¤¹¡£
show print symbol-filename: ¥·¥ó¥Ü¥ê¥Ã¥¯¤Ê·Á¼°¤Ç¤Î¥¢¥É¥ì¥¹É½¼¨¤Ë¤ª¤¤¤Æ¡¢ GDB¤¬¤½¤Î¥·¥ó¥Ü¥ë¤Î¥½¡¼¥¹¡¦¥Õ¥¡¥¤¥ëÌ¾¤È¹ÔÈÖ¹æ¤òÉ½¼¨¤¹¤ë¤«ÈÝ¤«¤ò¼¨¤·¤Þ¤¹¡£

¥·¥ó¥Ü¥ë¤Î¥½¡¼¥¹¡¦¥Õ¥¡¥¤¥ëÌ¾¤È¹ÔÈÖ¹æ¤òÉ½¼¨¤¹¤ë¤Î¤¬Ìò¤ËÎ©¤Ä¤â¤¦1¤Ä¤Î¾õ¶·¤È¤·¤Æ¡¢ ¥³¡¼¥É¤òµÕ¥¢¥»¥ó¥Ö¥ë¤¹¤ë¾ì¹ç¤¬¤¢¤ê¤Þ¤¹¡£ GDB¤¬¡¢ ¸Ä¡¹¤ÎÌ¿Îá¤ËÂÐ±þ¤¹¤ë¹ÔÈÖ¹æ¤È¥½¡¼¥¹¡¦¥Õ¥¡¥¤¥ë¤òÉ½¼¨¤·¤Æ¤¯¤ì¤Þ¤¹¡£

set print max-symbolic-offset max-offset: ¥¢¥É¥ì¥¹¤È¡¢ ¤½¤Î¥¢¥É¥ì¥¹¤è¤êÁ°¤Ë¤¢¤ëºÇ¤â¶á¤¤¥·¥ó¥Ü¥ë¤Î´Ö¤Î¥ª¥Õ¥»¥Ã¥È¤¬max-offsetÌ¤Ëþ¤Î¤È¤¤Î¤ß¡¢ ¤½¤Î¥¢¥É¥ì¥¹¤ò¥·¥ó¥Ü¥ê¥Ã¥¯¤Ê·Á¼°¤ÇÉ½¼¨¤¹¤ë¤è¤¦GDB¤ËÄÌÃÎ¤·¤Þ¤¹¡£ ¥Ç¥Õ¥©¥ë¥È¤Ï0¤Ç¡¢ ¤³¤ì¤ÏGDB¤ËÂÐ¤·¤Æ¡¢ ¥¢¥É¥ì¥¹¤è¤êÁ°¤Ë¥·¥ó¥Ü¥ë¤¬¤¢¤ë¾ì¹ç¤Ë¤Ï¡¢ ¾ï¤Ë¤½¤Î¥¢¥É¥ì¥¹¤ò¥·¥ó¥Ü¥ê¥Ã¥¯¤Ê·Á¼°¤ÇÉ½¼¨¤¹¤ë¤è¤¦ÄÌÃÎ¤·¤Þ¤¹¡£
show print max-symbolic-offset: GDB¤¬¥·¥ó¥Ü¥ê¥Ã¥¯¤Ê¥¢¥É¥ì¥¹¤òÉ½¼¨¤¹¤ë¾å¸Â¤È¤Ê¤ë¡¢ ºÇÂç¤Î¥ª¥Õ¥»¥Ã¥ÈÃÍ¤òÌä¤¤¹ç¤ï¤»¤Þ¤¹¡£

¤¢¤ë¥Ý¥¤¥ó¥¿¤¬¤É¤³¤ò»Ø¤·¤Æ¤¤¤ë¤«Äê¤«¤Ç¤Ï¤Ê¤¤¾ì¹ç¤Ë¤Ï¡¢ ‘set print symbol-filename on’¤ò»î¤ß¤Æ¤¯¤À¤µ¤¤¡£ ¤³¤¦¤¹¤ì¤Ð¡¢ ‘p/a pointer’¤ò»ÈÍÑ¤·¤Æ¡¢ ¤½¤Î¥Ý¥¤¥ó¥¿¤¬»Ø¤·¤Æ¤¤¤ëÊÑ¿ô¤ÎÌ¾Á°¤È¥½¡¼¥¹¡¦¥Õ¥¡¥¤¥ë¾å¤Î°ÌÃÖ¤¬Ê¬¤«¤ê¤Þ¤¹¡£ ¤³¤ì¤Ï¡¢ ¥¢¥É¥ì¥¹¤ò¥·¥ó¥Ü¥ê¥Ã¥¯·Á¼°¤Ç²ò¼á¤·¤Þ¤¹¡£ Îã¤¨¤Ð°Ê²¼¤ÎÎã¤Ç¤Ï¡¢ ¤¢¤ëÊÑ¿ôptt¤¬¥Õ¥¡¥¤¥ëhi2.cÆâ¤ÇÄêµÁ¤µ¤ì¤¿ÊÌ¤ÎÊÑ¿ôt¤ò»Ø¤·¤Æ¤¤¤ë¤³¤È¤ò¡¢ GDB¤¬¶µ¤¨¤Æ¤¯¤ì¤Æ¤¤¤Þ¤¹¡£

(gdb) set print symbol-filename on
(gdb) p/a ptt
$4 = 0xe008 <t in hi2.c>

Ãí°Õ: ¥í¡¼¥«¥ëÊÑ¿ô¤ò»Ø¤¹¥Ý¥¤¥ó¥¿¤Ë¤Ä¤¤¤Æ¤Ï¡¢ ¤¿¤È¤¨Å¬ÀÚ¤Êset print¥ª¥×¥·¥ç¥ó¤¬Í¸ú¤Ë¤Ê¤Ã¤Æ¤¤¤Æ¤â¡¢ ‘p/a’¤Ï¤½¤Î¥Ý¥¤¥ó¥¿¤Ë¤è¤Ã¤Æ»²¾È¤µ¤ì¤ëÊÑ¿ô¤Î¥·¥ó¥Ü¥ëÌ¾¤ä¥Õ¥¡¥¤¥ëÌ¾¤òÉ½¼¨¤·¤Þ¤»¤ó¡£

set print array

set print array on

ÇÛÎó¤ò¤¤ì¤¤¤ËÉ½¼¨¤·¤Þ¤¹¡£ ¤³¤Î¥Õ¥©¡¼¥Þ¥Ã¥È¤ÏÆÉ¤à¤Î¤Ë¤ÏÊØÍø¤Ç¤¹¤¬¡¢ ¤è¤êÂ¿¤¯¤Î¥¹¥Ú¡¼¥¹¤ò¼è¤ê¤Þ¤¹¡£ ¥Ç¥Õ¥©¥ë¥È¤Ï‘off’¤Ç¤¹¡£

set print array off

ÇÛÎó¤òµÍ¤á¹þ¤ß·Á¼°¤ÇÉ½¼¨¤·¤Þ¤¹¡£

show print array

ÇÛÎó¤ÎÉ½¼¨ÊýË¡¤È¤·¤Æ¡¢ µÍ¤á¹þ¤ß·Á¼°¤È¤¤ì¤¤¤Ê·Á¼°¤Î¤É¤Á¤é¤¬ÁªÂò¤µ¤ì¤Æ¤¤¤ë¤«¤ò¼¨¤·¤Þ¤¹¡£

set print elements number-of-elements

GDB¤Ë¤è¤Ã¤ÆÉ½¼¨¤µ¤ì¤ëÇÛÎó¤ÎÍ×ÁÇ¤Î¿ô¤Ë¾å¸Â¤òÀßÄê¤·¤Þ¤¹¡£ GDB¤¬Âç¤¤ÊÇÛÎó¤òÉ½¼¨¤·¤Æ¤¤¤ëºÝ¤Ë¡¢ É½¼¨¤µ¤ì¤¿Í×ÁÇ¤Î¿ô¤¬set print elements¥³¥Þ¥ó¥É¤ÇÀßÄê¤µ¤ì¤¿¿ô¤ËÃ£¤¹¤ë¤È¡¢ ¤½¤³¤ÇÉ½¼¨¤¬Ää»ß¤µ¤ì¤Þ¤¹¡£ ¤³¤Î¾å¸Â¤Ï¡¢ Ê¸»úÎó¤ÎÉ½¼¨¤Ë¤âÅ¬ÍÑ¤µ¤ì¤Þ¤¹¡£ number-of-elements¤Ë0¤ò¥»¥Ã¥È¤¹¤ë¤È¡¢ Í×ÁÇ¤ÏÌµÀ©¸Â¤ËÉ½¼¨¤µ¤ì¤Þ¤¹¡£

show print elements

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set print null-stop

ºÇ½é¤ËNULL¤¬¸¡½Ð¤µ¤ì¤¿»þÅÀ¤Ç¡¢ GDB¤ËÊ¸»úÇÛÎó¤ÎÉ½¼¨¤òÄä»ß¤µ¤»¤Þ¤¹¡£ ¤³¤ì¤Ï¡¢ Âç¤¤ÊÇÛÎó¤¬¼ÂºÝ¤Ë¤ÏÃ»¤¤Ê¸»úÎó¤·¤«´Þ¤ó¤Ç¤¤¤Ê¤¤¤È¤¤ËÌò¤ËÎ©¤Á¤Þ¤¹¡£

set print pretty on

¹½Â¤ÂÎ¤òÉ½¼¨¤¹¤ëºÝ¤Ë¡¢ ¥¤¥ó¥Ç¥ó¥È¤µ¤ì¤¿·Á¼°¤Ç1¹Ô¤Ë1¥á¥ó¥Ð¤º¤ÄGDB¤ËÉ½¼¨¤µ¤»¤Þ¤¹¡£ °Ê²¼¤ËÎã¤ò¼¨¤·¤Þ¤¹¡£

$1 = {
  next = 0x0,
  flags = {
    sweet = 1,
    sour = 1
  },
  meat = 0x54 "Pork"
}

set print pretty off

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$1 = {next = 0x0, flags = {sweet = 1, sour = 1}, \
meat = 0x54 "Pork"}

¤³¤ì¤¬¥Ç¥Õ¥©¥ë¥È¤Î·Á¼°¤Ç¤¹¡£

show print pretty

GDB¤¬¡¢ ¹½Â¤ÂÎ¤òÉ½¼¨¤¹¤ë¤Î¤Ë¤É¤Á¤é¤Î·Á¼°¤ò»ÈÍÑ¤·¤Æ¤¤¤ë¤«¤ò¼¨¤·¤Þ¤¹¡£

set print sevenbit-strings on

7¥Ó¥Ã¥ÈÊ¸»ú¤À¤±¤ò»ÈÍÑ¤·¤ÆÉ½¼¨¤·¤Þ¤¹¡£ ¤³¤Î¥ª¥×¥·¥ç¥ó¤¬¥»¥Ã¥È¤µ¤ì¤Æ¤¤¤ë¤È¡¢ GDB¤Ï ¡ÊÊ¸»úÎóÆâ¤Þ¤¿¤ÏÃ±°ìÊ¸»úÆâ¤Î¡Ë 8¥Ó¥Ã¥ÈÊ¸»ú¤ò\nnn¤È¤¤¤¦É½µË¡¤ÇÉ½¼¨¤·¤Þ¤¹¡£ ¤³¤ÎÀßÄê¤Ï¡¢±Ñ¸ì ¡ÊASCII¡Ë ´Ä¶¤Ë¤ª¤¤¤Æ¡¢ Ê¸»ú¤ÎºÇ¾å°Ì¥Ó¥Ã¥È¤ò¥Þ¡¼¥«¤ä¡Ö¥á¥¿¡×¥Ó¥Ã¥È¤È¤·¤Æ»ÈÍÑ¤¹¤ë¾ì¹ç¤ËºÇÅ¬¤Ç¤¹¡£

set print sevenbit-strings off

show print sevenbit-strings

GDB¤¬7¥Ó¥Ã¥ÈÊ¸»ú¤À¤±¤òÉ½¼¨¤¹¤ë¤«ÈÝ¤«¤ò¼¨¤·¤Þ¤¹¡£

set print union on

GDB¤ËÂÐ¤·¤Æ¡¢ ¹½Â¤ÂÎ¤ÎÃæ¤Ë´Þ¤Þ¤ì¤Æ¤¤¤ë¶¦ÍÑÂÎ¤òÉ½¼¨¤¹¤ë¤è¤¦ÄÌÃÎ¤·¤Þ¤¹¡£ ¤³¤ì¤¬¡¢ ¥Ç¥Õ¥©¥ë¥È¤ÎÀßÄê¤Ç¤¹¡£

set print union off

GDB¤ËÂÐ¤·¤Æ¡¢ ¹½Â¤ÂÎ¤ÎÃæ¤Ë´Þ¤Þ¤ì¤Æ¤¤¤ë¶¦ÍÑÂÎ¤òÉ½¼¨¤·¤Ê¤¤¤è¤¦ÄÌÃÎ¤·¤Þ¤¹¡£

show print union

GDB¤ËÂÐ¤·¤Æ¡¢ ¹½Â¤ÂÎ¤ÎÃæ¤Ë´Þ¤Þ¤ì¤Æ¤¤¤ë¶¦ÍÑÂÎ¤òÉ½¼¨¤¹¤ë¤«ÈÝ¤«¤òÌä¤¤¹ç¤ï¤»¤Þ¤¹¡£

Îã¤¨¤Ð¡¢ °Ê²¼¤Î¤è¤¦¤ËÀë¸À¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¡¢

typedef enum {Tree, Bug} Species;
typedef enum {Big_tree, Acorn, Seedling} Tree_forms;
typedef enum {Caterpillar, Cocoon, Butterfly} 
              Bug_forms;

struct thing {
  Species it;
  union {
    Tree_forms tree;
    Bug_forms bug;
  } form;
};

struct thing foo = {Tree, {Acorn}};

set print union on¤¬Í¸ú¤Ê¾ì¹ç¡¢ ‘p foo’¤Ï°Ê²¼¤Î¤è¤¦¤ÊÉ½¼¨¤ò¹Ô¤¤¤Þ¤¹¡£

$1 = {it = Tree, form = {tree = Acorn, bug = Cocoon}}

¤Þ¤¿¡¢ set print union off¤¬Í¸ú¤Ê¾ì¹ç¡¢ ‘p foo’¤Ï°Ê²¼¤Î¤è¤¦¤ÊÉ½¼¨¤ò¹Ô¤¤¤Þ¤¹¡£

$1 = {it = Tree, form = {...}}

set print demangle

set print demangle on

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show print demangle

C++¤Î¥·¥ó¥Ü¥ëÌ¾¤¬¡¢ ¥¨¥ó¥³¡¼¥É¤µ¤ì¤¿ ¡Êmangled¡Ë ·Á¼°¡¢ ¥½¡¼¥¹ ¡Êdemangled¡Ë ·Á¼°¤Î¤¤¤º¤ì¤Î·Á¼°¤ÇÉ½¼¨¤µ¤ì¤ë¤«¤ò¼¨¤·¤Þ¤¹¡£

set print asm-demangle

set print asm-demangle on

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show print asm-demangle

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set demangle-style style

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auto: GDB¤¬¥æ¡¼¥¶¡¦¥×¥í¥°¥é¥à¤ò²òÀÏ¤·¤Æ¥Ç¥³¡¼¥Ç¥£¥ó¥°Êý¼°¤ò·èÄê¤¹¤ë¤³¤È¤òµö¤·¤Þ¤¹¡£
hp: HP ANSI C++¡ÊaCC¡Ë¥¨¥ó¥³¡¼¥Ç¥£¥ó¥°¡¦¥¢¥ë¥´¥ê¥º¥à¤Ë´ð¤Å¤¤¤Æ¥Ç¥³¡¼¥É¤·¤Þ¤¹¡£
lucid: Lucid C++¡Êlcc¡Ë¥¨¥ó¥³¡¼¥Ç¥£¥ó¥°¡¦¥¢¥ë¥´¥ê¥º¥à¤Ë´ð¤Å¤¤¤Æ¥Ç¥³¡¼¥É¤·¤Þ¤¹¡£
arm: C++ Annotated Reference Manual¤Ëµ½Ò¤µ¤ì¤Æ¤¤¤ë¥¢¥ë¥´¥ê¥º¥à¤ò»ÈÍÑ¤·¤Æ¥Ç¥³¡¼¥É¤·¤Þ¤¹¡£ Ãí°Õ: ¤³¤ÎÀßÄê¤À¤±¤Ç¤Ï¡¢ cfront¤Ë¤è¤Ã¤ÆÀ¸À®¤µ¤ì¤¿¼Â¹Ô¥â¥¸¥å¡¼¥ë¤ò¥Ç¥Ð¥Ã¥°¤¹¤ë¤Î¤Ë½½Ê¬¤Ç¤Ï¤¢¤ê¤Þ¤»¤ó¡£ ¤³¤ì¤ò²ÄÇ½¤Ë¤¹¤ë¤¿¤á¤Ë¤Ï¡¢ GDB¤ò¤µ¤é¤Ë³ÈÄ¥¤¹¤ëÉ¬Í×¤¬¤¢¤ê¤Þ¤¹¡£

show demangle-style

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set print object

set print object on

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set print object off

show print object

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set print static-members

set print static-members on

set print static-members off

C++¤Î¥ª¥Ö¥¸¥§¥¯¥È¤òÉ½¼¨¤¹¤ëºÝ¡¢ ÀÅÅª¥á¥ó¥Ð¤òÉ½¼¨¤·¤Þ¤»¤ó¡£

show print static-members

C++¤ÎÀÅÅª¥á¥ó¥Ð¤¬É½¼¨¤µ¤ì¤ë¤«ÈÝ¤«¤ò¼¨¤·¤Þ¤¹¡£

set print vtbl

set print vtbl on

set print vtbl off

show print vtbl

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