{"id":629,"date":"2017-08-07T17:19:32","date_gmt":"2017-08-07T09:19:32","guid":{"rendered":"http:\/\/williamxin.f3322.org\/wordpress\/?p=199"},"modified":"2017-11-24T15:19:00","modified_gmt":"2017-11-24T07:19:00","slug":"linux%e4%b8%8bgdb%e8%b0%83%e8%af%95","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/629","title":{"rendered":"LINUX\u4e0bGDB\u8c03\u8bd5"},"content":{"rendered":"
\n

LINUX\u4e0bGDB\u8c03\u8bd5<\/a><\/span><\/h1>\n<\/div>\n
\n
\u6807\u7b7e\uff1a\u00a0linux<\/a>\u6c47\u7f16<\/a>\u7a0b\u5e8f\u8c03\u8bd5\u5de5\u5177<\/a>file<\/a>\u7f16\u8bd1\u5668<\/a><\/span><\/div>\n
2011-09-27 11:40<\/span>\u00a039210\u4eba\u9605\u8bfb<\/span>\u00a0\u8bc4\u8bba<\/a>(4)<\/span>\u00a0\u6536\u85cf<\/a><\/span>\u00a0\u4e3e\u62a5<\/a><\/span><\/div>\n<\/div>\n
\n
\u00a0\u5206\u7c7b\uff1a<\/div>\n
\n

\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3a\u535a\u4e3b\u539f\u521b\u6587\u7ae0\uff0c\u672a\u7ecf\u535a\u4e3b\u5141\u8bb8\u4e0d\u5f97\u8f6c\u8f7d\u3002<\/p>\n<\/div>\n

\n

\u672c\u6587\u5199\u7ed9\u4e3b\u8981\u5de5\u4f5c\u5728Windows\u64cd\u4f5c\u7cfb\u7edf<\/a>\u4e0b\u800c\u53c8\u9700\u8981\u5f00\u53d1\u4e00\u4e9b\u8de8\u5e73\u53f0\u8f6f\u4ef6\u7684\u7a0b\u5e8f\u5458\u670b\u53cb\uff0c\u4ee5\u53ca\u7a0b\u5e8f\u7231\u597d\u8005\u3002<\/p>\n

GDB\u662f\u4e00\u4e2a\u7531GNU\u5f00\u6e90\u7ec4\u7ec7\u53d1\u5e03\u7684\u3001UNIX\/Linux<\/a>\u64cd\u4f5c\u7cfb\u7edf\u4e0b\u7684\u3001\u57fa\u4e8e\u547d\u4ee4\u884c\u7684\u3001\u529f\u80fd\u5f3a\u5927\u7684\u7a0b\u5e8f\u8c03\u8bd5\u5de5\u5177\u3002<\/p>\n

GDB\u4e2d\u7684\u547d\u4ee4\u56fa\u7136\u5f88\u591a\uff0c\u4f46\u6211\u4eec\u53ea\u9700\u638c\u63e1\u5176\u4e2d\u5341\u4e2a\u5de6\u53f3\u7684\u547d\u4ee4\uff0c\u5c31\u5927\u81f4\u53ef\u4ee5\u5b8c\u6210\u65e5\u5e38\u7684\u57fa\u672c\u7684\u7a0b\u5e8f\u8c03\u8bd5\u5de5\u4f5c\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u547d\u4ee4<\/td>\n\u89e3\u91ca<\/td>\n\u793a\u4f8b<\/td>\n<\/tr>\n
file <\u6587\u4ef6\u540d><\/td>\n\u52a0\u8f7d\u88ab\u8c03\u8bd5\u7684\u53ef\u6267\u884c\u7a0b\u5e8f\u6587\u4ef6\u3002
\n\u56e0\u4e3a\u4e00\u822c\u90fd\u5728\u88ab\u8c03\u8bd5\u7a0b\u5e8f\u6240\u5728\u76ee\u5f55\u4e0b\u6267\u884cGDB\uff0c\u56e0\u800c\u6587\u672c\u540d\u4e0d\u9700\u8981\u5e26\u8def\u5f84\u3002<\/td>\n		(gdb) file gdb-sample<\/td>\n<\/tr>\n
r<\/td>\nRun\u7684\u7b80\u5199\uff0c\u8fd0\u884c\u88ab\u8c03\u8bd5\u7684\u7a0b\u5e8f\u3002
\n\u5982\u679c\u6b64\u524d\u6ca1\u6709\u4e0b\u8fc7\u65ad\u70b9\uff0c\u5219\u6267\u884c\u5b8c\u6574\u4e2a\u7a0b\u5e8f\uff1b\u5982\u679c\u6709\u65ad\u70b9\uff0c\u5219\u7a0b\u5e8f\u6682\u505c\u5728\u7b2c\u4e00\u4e2a\u53ef\u7528\u65ad\u70b9\u5904\u3002<\/td>\n		(gdb) r<\/td>\n<\/tr>\n
c<\/td>\nContinue\u7684\u7b80\u5199\uff0c\u7ee7\u7eed\u6267\u884c\u88ab\u8c03\u8bd5\u7a0b\u5e8f\uff0c\u76f4\u81f3\u4e0b\u4e00\u4e2a\u65ad\u70b9\u6216\u7a0b\u5e8f\u7ed3\u675f\u3002<\/td>\n(gdb) c<\/td>\n<\/tr>\n
b <\u884c\u53f7>
\nb <\u51fd\u6570\u540d\u79f0>
\nb *<\u51fd\u6570\u540d\u79f0>
\nb *<\u4ee3\u7801\u5730\u5740>d [\u7f16\u53f7]<\/td>\n		b: Breakpoint\u7684\u7b80\u5199\uff0c\u8bbe\u7f6e\u65ad\u70b9\u3002\u4e24\u53ef\u4ee5\u4f7f\u7528\u201c\u884c\u53f7\u201d\u201c\u51fd\u6570\u540d\u79f0\u201d\u201c\u6267\u884c\u5730\u5740\u201d\u7b49\u65b9\u5f0f\u6307\u5b9a\u65ad\u70b9\u4f4d\u7f6e\u3002
\n\u5176\u4e2d\u5728\u51fd\u6570\u540d\u79f0\u524d\u9762\u52a0\u201c*\u201d\u7b26\u53f7\u8868\u793a\u5c06\u65ad\u70b9\u8bbe\u7f6e\u5728\u201c\u7531\u7f16\u8bd1\u5668\u751f\u6210\u7684prolog\u4ee3\u7801\u5904\u201d\u3002\u5982\u679c\u4e0d\u4e86\u89e3\u6c47\u7f16\uff0c\u53ef\u4ee5\u4e0d\u4e88\u7406\u4f1a\u6b64\u7528\u6cd5\u3002d: Delete breakpoint\u7684\u7b80\u5199\uff0c\u5220\u9664\u6307\u5b9a\u7f16\u53f7\u7684\u67d0\u4e2a\u65ad\u70b9\uff0c\u6216\u5220\u9664\u6240\u6709\u65ad\u70b9\u3002\u65ad\u70b9\u7f16\u53f7\u4ece1\u5f00\u59cb\u9012\u589e\u3002<\/td>\n		(gdb) b 8
\n(gdb) b main
\n(gdb) b *main
\n(gdb) b *0x804835c(gdb) d<\/td>\n<\/tr>\n
s, n<\/td>\ns: \u6267\u884c\u4e00\u884c\u6e90\u7a0b\u5e8f\u4ee3\u7801\uff0c\u5982\u679c\u6b64\u884c\u4ee3\u7801\u4e2d\u6709\u51fd\u6570\u8c03\u7528\uff0c\u5219\u8fdb\u5165\u8be5\u51fd\u6570\uff1b
\nn: \u6267\u884c\u4e00\u884c\u6e90\u7a0b\u5e8f\u4ee3\u7801\uff0c\u6b64\u884c\u4ee3\u7801\u4e2d\u7684\u51fd\u6570\u8c03\u7528\u4e5f\u4e00\u5e76\u6267\u884c\u3002s \u76f8\u5f53\u4e8e\u5176\u5b83\u8c03\u8bd5\u5668\u4e2d\u7684\u201cStep Into (\u5355\u6b65\u8ddf\u8e2a\u8fdb\u5165)\u201d\uff1b
\nn \u76f8\u5f53\u4e8e\u5176\u5b83\u8c03\u8bd5\u5668\u4e2d\u7684\u201cStep Over (\u5355\u6b65\u8ddf\u8e2a)\u201d\u3002<\/p>\n

\u8fd9\u4e24\u4e2a\u547d\u4ee4\u5fc5\u987b\u5728\u6709\u6e90\u4ee3\u7801\u8c03\u8bd5\u4fe1\u606f\u7684\u60c5\u51b5\u4e0b\u624d\u53ef\u4ee5\u4f7f\u7528\uff08GCC\u7f16\u8bd1\u65f6\u4f7f\u7528\u201c-g\u201d\u53c2\u6570\uff09\u3002<\/td>\n

(gdb) s
\n(gdb) n<\/td>\n<\/tr>\n
si, ni<\/td>\nsi\u547d\u4ee4\u7c7b\u4f3c\u4e8es\u547d\u4ee4\uff0cni\u547d\u4ee4\u7c7b\u4f3c\u4e8en\u547d\u4ee4\u3002\u6240\u4e0d\u540c\u7684\u662f\uff0c\u8fd9\u4e24\u4e2a\u547d\u4ee4\uff08si\/ni\uff09\u6240\u9488\u5bf9\u7684\u662f\u6c47\u7f16\u6307\u4ee4\uff0c\u800cs\/n\u9488\u5bf9\u7684\u662f\u6e90\u4ee3\u7801\u3002<\/td>\n(gdb) si
\n(gdb) ni<\/td>\n<\/tr>\n
p <\u53d8\u91cf\u540d\u79f0><\/td>\nPrint\u7684\u7b80\u5199\uff0c\u663e\u793a\u6307\u5b9a\u53d8\u91cf\uff08\u4e34\u65f6\u53d8\u91cf\u6216\u5168\u5c40\u53d8\u91cf\uff09\u7684\u503c\u3002<\/td>\n(gdb) p i
\n(gdb) p nGlobalVar<\/td>\n<\/tr>\n
display …undisplay <\u7f16\u53f7><\/td>\ndisplay\uff0c\u8bbe\u7f6e\u7a0b\u5e8f\u4e2d\u65ad\u540e\u6b32\u663e\u793a\u7684\u6570\u636e\u53ca\u5176\u683c\u5f0f\u3002
\n\u4f8b\u5982\uff0c\u5982\u679c\u5e0c\u671b\u6bcf\u6b21\u7a0b\u5e8f\u4e2d\u65ad\u540e\u53ef\u4ee5\u770b\u5230\u5373\u5c06\u88ab\u6267\u884c\u7684\u4e0b\u4e00\u6761\u6c47\u7f16\u6307\u4ee4\uff0c\u53ef\u4ee5\u4f7f\u7528\u547d\u4ee4
\n\u201cdisplay \/i $pc\u201d
\n\u5176\u4e2d $pc \u4ee3\u8868\u5f53\u524d\u6c47\u7f16\u6307\u4ee4\uff0c\/i \u8868\u793a\u4ee5\u5341\u516d\u8fdb\u884c\u663e\u793a\u3002\u5f53\u9700\u8981\u5173\u5fc3\u6c47\u7f16\u4ee3\u7801\u65f6\uff0c\u6b64\u547d\u4ee4\u76f8\u5f53\u6709\u7528\u3002undispaly\uff0c\u53d6\u6d88\u5148\u524d\u7684display\u8bbe\u7f6e\uff0c\u7f16\u53f7\u4ece1\u5f00\u59cb\u9012\u589e\u3002<\/td>\n		(gdb) display \/i $pc(gdb) undisplay 1<\/td>\n<\/tr>\n
i<\/td>\nInfo\u7684\u7b80\u5199\uff0c\u7528\u4e8e\u663e\u793a\u5404\u7c7b\u4fe1\u606f\uff0c\u8be6\u60c5\u8bf7\u67e5\u9605\u201chelp i\u201d\u3002<\/td>\n(gdb) i r<\/td>\n<\/tr>\n
q<\/td>\nQuit\u7684\u7b80\u5199\uff0c\u9000\u51faGDB\u8c03\u8bd5\u73af\u5883\u3002<\/td>\n(gdb) q<\/td>\n<\/tr>\n
help [\u547d\u4ee4\u540d\u79f0]<\/td>\nGDB\u5e2e\u52a9\u547d\u4ee4\uff0c\u63d0\u4f9b\u5bf9GDB\u540d\u79cd\u547d\u4ee4\u7684\u89e3\u91ca\u8bf4\u660e\u3002
\n\u5982\u679c\u6307\u5b9a\u4e86\u201c\u547d\u4ee4\u540d\u79f0\u201d\u53c2\u6570\uff0c\u5219\u663e\u793a\u8be5\u547d\u4ee4\u7684\u8be6\u7ec6\u8bf4\u660e\uff1b\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u53c2\u6570\uff0c\u5219\u5206\u7c7b\u663e\u793a\u6240\u6709GDB\u547d\u4ee4\uff0c\u4f9b\u7528\u6237\u8fdb\u4e00\u6b65\u6d4f\u89c8\u548c\u67e5\u8be2\u3002<\/td>\n		(gdb) help display<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\/add************************************\/<\/strong><\/p>\n

j\u547d\u4ee4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u56de\u8df3<\/strong><\/p>\n

ret\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8bbe\u7f6e\u8fd4\u56de\u503c\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (\u4f8bret 0\/ret -1)<\/strong><\/p>\n

\/add************************************\/<\/strong><\/p>\n

\u5e9f\u8bdd\u4e0d\u591a\u8bf4\uff0c\u4e0b\u9762\u5f00\u59cb\u5b9e\u8df5\u3002<\/p>\n

\u5148\u7ed9\u51fa\u4e00\u4e2a\u793a\u4f8b\u7528\u7684\u5c0f\u7a0b\u5e8f\uff0cC\u8bed\u8a00<\/a>\u4ee3\u7801\uff0c\u7b80\u5355\u7684\u4e0d\u80fd\u518d\u7b80\u5355\u4e86\uff1a<\/p>\n\n\n\n
1
\n2
\n3
\n4
\n5
\n6
\n7
\n8
\n9
\n10
\n11
\n12
\n13
\n14
\n15
\n16
\n17
\n18
\n19
\n20
\n21
\n22
\n23
\n24
\n25
\n26
\n27
\n28
\n29
\n30
\n31
\n32
\n33<\/td>\n		\/\/\u6b64\u7a0b\u5e8f\u4ec5\u4f5c\u4e3a\u201cGDB\u5341\u5206\u949f\u6559\u7a0b\u201d\u7684\u793a\u4f8b\u4ee3\u7801, by liigo
\n\/\/Email:\u00a0liigo@sina.com<\/a>
\n\/\/blog:\u00a0http:\/\/blog.csdn.net\/liigo<\/a>
\n\/\/WebSite:\u00a0www.liigo.com<\/a><\/p>\n

#include\u00a0<stdio.h><\/p>\n

int\u00a0nGlobalVar\u00a0=\u00a00;<\/p>\n

int\u00a0tempFunction(int\u00a0a,\u00a0int\u00a0b)
\n{
\nprintf(“tempFunction is called, a = %d, b = %d \/n”,\u00a0a,\u00a0b);
\nreturn\u00a0(a\u00a0+\u00a0b);
\n}<\/p>\n

int\u00a0main()
\n{
\nint\u00a0n;
\nn\u00a0=\u00a01;
\nn++;
\nn–;<\/p>\n

nGlobalVar\u00a0+=\u00a0100;
\nnGlobalVar\u00a0-=\u00a012;<\/p>\n

printf(“n = %d, nGlobalVar = %d \/n”,\u00a0n,\u00a0nGlobalVar);<\/p>\n

n\u00a0=\u00a0tempFunction(1,\u00a02);
\nprintf(“n = %d”,\u00a0n);<\/p>\n

return\u00a00;
\n}<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8bf7\u5c06\u6b64\u4ee3\u7801\u590d\u5236\u51fa\u6765\u5e76\u4fdd\u5b58\u5230\u6587\u4ef6 gdb-sample.c \u4e2d\uff0c\u7136\u540e\u5207\u6362\u5230\u6b64\u6587\u4ef6\u6240\u5728\u76ee\u5f55\uff0c\u7528GCC\u7f16\u8bd1\u4e4b\uff1a<\/p>\n\n\n\n
gcc gdb-sample.c -o gdb-sample -g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5728\u4e0a\u9762\u7684\u547d\u4ee4\u884c\u4e2d\uff0c\u4f7f\u7528 -o \u53c2\u6570\u6307\u5b9a\u4e86\u7f16\u8bd1\u751f\u6210\u7684\u53ef\u6267\u884c\u6587\u4ef6\u540d\u4e3a gdb-sample\uff0c\u4f7f\u7528\u53c2\u6570 -g \u8868\u793a\u5c06\u6e90\u4ee3\u7801\u4fe1\u606f\u7f16\u8bd1\u5230\u53ef\u6267\u884c\u6587\u4ef6\u4e2d\u3002\u5982\u679c\u4e0d\u4f7f\u7528\u53c2\u6570 -g\uff0c\u4f1a\u7ed9\u540e\u9762\u7684GDB\u8c03\u8bd5\u9020\u6210\u4e0d\u4fbf\u3002\u5f53\u7136\uff0c\u5982\u679c\u6211\u4eec\u6ca1\u6709\u7a0b\u5e8f\u7684\u6e90\u4ee3\u7801\uff0c\u81ea\u7136\u4e5f\u65e0\u4ece\u4f7f\u7528 -g \u53c2\u6570\uff0c\u8c03\u8bd5\/\u8ddf\u8e2a\u65f6\u4e5f\u53ea\u80fd\u662f\u6c47\u7f16\u4ee3\u7801\u7ea7\u522b\u7684\u8c03\u8bd5\/\u8ddf\u8e2a\u3002<\/p>\n

\u4e0b\u9762\u201cgdb\u201d\u547d\u4ee4\u542f\u52a8GDB\uff0c\u5c06\u9996\u5148\u663e\u793aGDB\u8bf4\u660e\uff0c\u4e0d\u7ba1\u5b83\uff1a<\/p>\n\n\n\n
GNU gdb Red Hat Linux (5.3post-0.20021129.18rh)
\nCopyright 2003 Free Software Foundation, Inc.
\nGDB is free software, covered by the GNU General Public License, and you are
\nwelcome to change it and\/or distribute copies of it under certain conditions.
\nType “show copying” to see the conditions.
\nThere is absolutely no warranty for GDB. Type “show warranty” for details.
\nThis GDB was configured as “i386-redhat-linux-gnu”.
\n(gdb)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e0a\u9762\u6700\u540e\u4e00\u884c\u201c(gdb) \u201d\u4e3aGDB\u5185\u90e8\u547d\u4ee4\u5f15\u5bfc\u7b26\uff0c\u7b49\u5f85\u7528\u6237\u8f93\u5165GDB\u547d\u4ee4\u3002<\/p>\n

\u4e0b\u9762\u4f7f\u7528\u201cfile\u201d\u547d\u4ee4\u8f7d\u5165\u88ab\u8c03\u8bd5\u7a0b\u5e8f gdb-sample\uff08\u8fd9\u91cc\u7684 gdb-sample \u5373\u524d\u9762 GCC \u7f16\u8bd1\u8f93\u51fa\u7684\u53ef\u6267\u884c\u6587\u4ef6\uff09\uff1a<\/p>\n\n\n\n
(gdb) file gdb-sample
\nReading symbols from gdb-sample…done.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e0a\u9762\u6700\u540e\u4e00\u884c\u63d0\u793a\u5df2\u7ecf\u52a0\u8f7d\u6210\u529f\u3002<\/p>\n

\u4e0b\u9762\u4f7f\u7528\u201cr\u201d\u547d\u4ee4\u6267\u884c\uff08Run\uff09\u88ab\u8c03\u8bd5\u6587\u4ef6\uff0c\u56e0\u4e3a\u5c1a\u672a\u8bbe\u7f6e\u4efb\u4f55\u65ad\u70b9\uff0c\u5c06\u76f4\u63a5\u6267\u884c\u5230\u7a0b\u5e8f\u7ed3\u675f\uff1a<\/p>\n\n\n\n
(gdb) r
\nStarting program: \/home\/liigo\/temp\/test_jmp\/test_jmp\/gdb-sample
\nn = 1, nGlobalVar = 88
\ntempFunction is called, a = 1, b = 2
\nn = 3
\nProgram exited normally.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e0b\u9762\u4f7f\u7528\u201cb\u201d\u547d\u4ee4\u5728 main \u51fd\u6570\u5f00\u5934\u8bbe\u7f6e\u4e00\u4e2a\u65ad\u70b9\uff08Breakpoint\uff09\uff1a<\/p>\n\n\n\n
(gdb) b main
\nBreakpoint 1 at 0x804835c: file gdb-sample.c, line 19.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e0a\u9762\u6700\u540e\u4e00\u884c\u63d0\u793a\u5df2\u7ecf\u6210\u529f\u8bbe\u7f6e\u65ad\u70b9\uff0c\u5e76\u7ed9\u51fa\u4e86\u8be5\u65ad\u70b9\u4fe1\u606f\uff1a\u5728\u6e90\u6587\u4ef6 gdb-sample.c \u7b2c19\u884c\u5904\u8bbe\u7f6e\u65ad\u70b9\uff1b\u8fd9\u662f\u672c\u7a0b\u5e8f\u7684\u7b2c\u4e00\u4e2a\u65ad\u70b9\uff08\u5e8f\u53f7\u4e3a1\uff09\uff1b\u65ad\u70b9\u5904\u7684\u4ee3\u7801\u5730\u5740\u4e3a 0x804835c\uff08\u6b64\u503c\u53ef\u80fd\u4ec5\u5728\u672c\u6b21\u8c03\u8bd5\u8fc7\u7a0b\u4e2d\u6709\u6548\uff09\u3002\u56de\u8fc7\u5934\u53bb\u770b\u6e90\u4ee3\u7801\uff0c\u7b2c19\u884c\u4e2d\u7684\u4ee3\u7801\u4e3a\u201cn = 1\u201d\uff0c\u6070\u597d\u662f main \u51fd\u6570\u4e2d\u7684\u7b2c\u4e00\u4e2a\u53ef\u6267\u884c\u8bed\u53e5\uff08\u524d\u9762\u7684\u201cint n;\u201d\u4e3a\u53d8\u91cf\u5b9a\u4e49\u8bed\u53e5\uff0c\u5e76\u975e\u53ef\u6267\u884c\u8bed\u53e5\uff09\u3002<\/p>\n

\u518d\u6b21\u4f7f\u7528\u201cr\u201d\u547d\u4ee4\u6267\u884c\uff08Run\uff09\u88ab\u8c03\u8bd5\u7a0b\u5e8f\uff1a<\/p>\n\n\n\n
(gdb) r
\nStarting program: \/home\/liigo\/temp\/gdb-sample<\/p>\n

Breakpoint 1, main () at gdb-sample.c:19
\n19 n = 1;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u7a0b\u5e8f\u4e2d\u65ad\u5728gdb-sample.c\u7b2c19\u884c\u5904\uff0c\u5373main\u51fd\u6570\u662f\u7b2c\u4e00\u4e2a\u53ef\u6267\u884c\u8bed\u53e5\u5904\u3002<\/p>\n

\u4e0a\u9762\u6700\u540e\u4e00\u884c\u4fe1\u606f\u4e3a\uff1a\u4e0b\u4e00\u6761\u5c06\u8981\u6267\u884c\u7684\u6e90\u4ee3\u7801\u4e3a\u201cn = 1;\u201d\uff0c\u5b83\u662f\u6e90\u4ee3\u7801\u6587\u4ef6gdb-sample.c\u4e2d\u7684\u7b2c19\u884c\u3002<\/p>\n

\u4e0b\u9762\u4f7f\u7528\u201cs\u201d\u547d\u4ee4\uff08Step\uff09\u6267\u884c\u4e0b\u4e00\u884c\u4ee3\u7801\uff08\u5373\u7b2c19\u884c\u201cn = 1;\u201d\uff09\uff1a<\/p>\n\n\n\n
(gdb) s
\n20 n++;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e0a\u9762\u7684\u4fe1\u606f\u8868\u793a\u5df2\u7ecf\u6267\u884c\u5b8c\u201cn = 1;\u201d\uff0c\u5e76\u663e\u793a\u4e0b\u4e00\u6761\u8981\u6267\u884c\u7684\u4ee3\u7801\u4e3a\u7b2c20\u884c\u7684\u201cn++;\u201d\u3002<\/p>\n

\u65e2\u7136\u5df2\u7ecf\u6267\u884c\u4e86\u201cn = 1;\u201d\uff0c\u5373\u7ed9\u53d8\u91cf n \u8d4b\u503c\u4e3a 1\uff0c\u90a3\u6211\u4eec\u7528\u201cp\u201d\u547d\u4ee4\uff08Print\uff09\u770b\u4e00\u4e0b\u53d8\u91cf n \u7684\u503c\u662f\u4e0d\u662f 1 \uff1a<\/p>\n\n\n\n
(gdb) p n
\n$1 = 1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u679c\u7136\u662f 1\u3002\uff08$1\u5927\u81f4\u662f\u8868\u793a\u8fd9\u662f\u7b2c\u4e00\u6b21\u4f7f\u7528\u201cp\u201d\u547d\u4ee4\u2014\u2014\u518d\u6b21\u6267\u884c\u201cp n\u201d\u5c06\u663e\u793a\u201c$2 = 1\u201d\u2014\u2014\u6b64\u4fe1\u606f\u5e94\u8be5\u6ca1\u6709\u4ec0\u4e48\u7528\u5904\u3002\uff09<\/p>\n

\u4e0b\u9762\u6211\u4eec\u5206\u522b\u5728\u7b2c26\u884c\u3001tempFunction \u51fd\u6570\u5f00\u5934\u5404\u8bbe\u7f6e\u4e00\u4e2a\u65ad\u70b9\uff08\u5206\u522b\u4f7f\u7528\u547d\u4ee4\u201cb 26\u201d\u201cb tempFunction\u201d\uff09\uff1a<\/p>\n\n\n\n
(gdb) b 26
\nBreakpoint 2 at 0x804837b: file gdb-sample.c, line 26.
\n(gdb) b tempFunction
\nBreakpoint 3 at 0x804832e: file gdb-sample.c, line 12.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4f7f\u7528\u201cc\u201d\u547d\u4ee4\u7ee7\u7eed\uff08Continue\uff09\u6267\u884c\u88ab\u8c03\u8bd5\u7a0b\u5e8f\uff0c\u7a0b\u5e8f\u5c06\u4e2d\u65ad\u5728\u7b2c\u4e8c \u4e2a\u65ad\u70b9\uff0826\u884c\uff09\uff0c\u6b64\u65f6\u5168\u5c40\u53d8\u91cf nGlobalVar \u7684\u503c\u5e94\u8be5\u662f 88\uff1b\u518d\u4e00\u6b21\u6267\u884c\u201cc\u201d\u547d\u4ee4\uff0c\u7a0b\u5e8f\u5c06\u4e2d\u65ad\u4e8e\u7b2c\u4e09\u4e2a\u65ad\u70b9\uff0812\u884c\uff0ctempFunction \u51fd\u6570\u5f00\u5934\u5904\uff09\uff0c\u6b64\u65f6tempFunction \u51fd\u6570\u7684\u4e24\u4e2a\u53c2\u6570 a\u3001b \u7684\u503c\u5e94\u5206\u522b\u662f 1 \u548c 2\uff1a<\/p>\n\n\n\n
(gdb) c
\nContinuing.<\/p>\n

Breakpoint 2, main () at gdb-sample.c:26
\n26 printf(“n = %d, nGlobalVar = %d \/n”, n, nGlobalVar);
\n(gdb) p nGlobalVar
\n$2 = 88
\n(gdb) c
\nContinuing.
\nn = 1, nGlobalVar = 88<\/p>\n

Breakpoint 3, tempFunction (a=1, b=2) at gdb-sample.c:12
\n12 printf(“tempFunction is called, a = %d, b = %d \/n”, a, b);
\n(gdb) p a
\n$3 = 1
\n(gdb) p b
\n$4 = 2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e0a\u9762\u53cd\u9988\u7684\u4fe1\u606f\u4e00\u5207\u90fd\u5728\u6211\u4eec\u9884\u6599\u4e4b\u4e2d\uff0c\u54c8\u54c8~~~<\/p>\n

\u518d\u4e00\u6b21\u6267\u884c\u201cc\u201d\u547d\u4ee4\uff08Continue\uff09\uff0c\u56e0\u4e3a\u540e\u9762\u518d\u4e5f\u6ca1\u6709\u5176\u5b83\u65ad\u70b9\uff0c\u7a0b\u5e8f\u5c06\u4e00\u76f4\u6267\u884c\u5230\u7ed3\u675f\uff1a<\/p>\n\n\n\n
(gdb) c
\nContinuing.
\ntempFunction is called, a = 1, b = 2
\nn = 3
\nProgram exited normally.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6709\u65f6\u5019\u9700\u8981\u770b\u5230\u7f16\u8bd1\u5668\u751f\u6210\u7684\u6c47\u7f16\u4ee3\u7801\uff0c\u4ee5\u8fdb\u884c\u6c47\u7f16\u7ea7\u7684\u8c03\u8bd5\u6216\u8ddf\u8e2a\uff0c\u53c8\u8be5\u5982\u4f55\u64cd\u4f5c\u5462\uff1f<\/p>\n

\u8fd9\u5c31\u8981\u7528\u5230display\u547d\u4ee4\u201cdisplay \/i $pc\u201d\u4e86\uff08\u6b64\u547d\u4ee4\u524d\u9762\u5df2\u6709\u8be6\u7ec6\u89e3\u91ca\uff09\uff1a<\/p>\n\n\n\n
(gdb) display \/i $pc
\n(gdb)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6b64\u540e\u7a0b\u5e8f\u518d\u4e2d\u65ad\u65f6\uff0c\u5c31\u53ef\u4ee5\u663e\u793a\u51fa\u6c47\u7f16\u4ee3\u7801\u4e86\uff1a<\/p>\n\n\n\n
(gdb) r
\nStarting program: \/home\/liigo\/temp\/test_jmp\/test_jmp\/gdb-sample<\/p>\n

Breakpoint 1, main () at gdb-sample.c:19
\n19 n = 1;
\n1: x\/i $pc 0x804835c <main+16>: movl $0x1,0xfffffffc(%ebp)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u770b\u5230\u4e86\u6c47\u7f16\u4ee3\u7801\uff0c\u201cn = 1;\u201d\u5bf9\u5e94\u7684\u6c47\u7f16\u4ee3\u7801\u662f\u201cmovl $0x1,0xfffffffc(%ebp)\u201d\u3002<\/p>\n

\u5e76\u4e14\u4ee5\u540e\u7a0b\u5e8f\u6bcf\u6b21\u4e2d\u65ad\u90fd\u5c06\u663e\u793a\u4e0b\u4e00\u6761\u6c47\u7f16\u6307\u5b9a\uff08\u201csi\u201d\u547d\u4ee4\u7528\u4e8e\u6267\u884c\u4e00\u6761\u6c47\u7f16\u4ee3\u7801\u2014\u2014\u533a\u522b\u4e8e\u201cs\u201d\u6267\u884c\u4e00\u884cC\u4ee3\u7801\uff09\uff1a<\/p>\n\n\n\n
(gdb) si
\n20 n++;
\n1: x\/i $pc 0x8048363 <main+23>: lea 0xfffffffc(%ebp),%eax
\n(gdb) si
\n0x08048366 20 n++;
\n1: x\/i $pc 0x8048366 <main+26>: incl (%eax)
\n(gdb) si
\n21 n–;
\n1: x\/i $pc 0x8048368 <main+28>: lea 0xfffffffc(%ebp),%eax
\n(gdb) si
\n0x0804836b 21 n–;
\n1: x\/i $pc 0x804836b <main+31>: decl (%eax)
\n(gdb) si
\n23 nGlobalVar += 100;
\n1: x\/i $pc 0x804836d <main+33>: addl $0x64,0x80494fc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u63a5\u4e0b\u6765\u6211\u4eec\u8bd5\u4e00\u4e0b\u547d\u4ee4\u201cb *<\u51fd\u6570\u540d\u79f0>\u201d\u3002<\/p>\n

\u4e3a\u4e86\u66f4\u7b80\u660e\uff0c\u6709\u5fc5\u8981\u5148\u5220\u9664\u76ee\u524d\u6240\u6709\u65ad\u70b9\uff08\u4f7f\u7528\u201cd\u201d\u547d\u4ee4\u2014\u2014Delete breakpoint\uff09\uff1a<\/p>\n\n\n\n
(gdb) d
\nDelete all breakpoints? (y or n) y
\n(gdb)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5f53\u88ab\u8be2\u95ee\u662f\u5426\u5220\u9664\u6240\u6709\u65ad\u70b9\u65f6\uff0c\u8f93\u5165\u201cy\u201d\u5e76\u6309\u56de\u8f66\u952e\u5373\u53ef\u3002<\/p>\n

\u4e0b\u9762\u4f7f\u7528\u547d\u4ee4\u201cb *main\u201d\u5728 main \u51fd\u6570\u7684 prolog \u4ee3\u7801\u5904\u8bbe\u7f6e\u65ad\u70b9\uff08prolog\u3001epilog\uff0c\u5206\u522b\u8868\u793a\u7f16\u8bd1\u5668\u5728\u6bcf\u4e2a\u51fd\u6570\u7684\u5f00\u5934\u548c\u7ed3\u5c3e\u81ea\u884c\u63d2\u5165\u7684\u4ee3\u7801\uff09\uff1a<\/p>\n\n\n\n
(gdb) b *main
\nBreakpoint 4 at 0x804834c: file gdb-sample.c, line 17.
\n(gdb) r
\nThe program being debugged has been started already.
\nStart it from the beginning? (y or n) y
\nStarting program: \/home\/liigo\/temp\/test_jmp\/test_jmp\/gdb-sample<\/p>\n

Breakpoint 4, main () at gdb-sample.c:17
\n17 {
\n1: x\/i $pc 0x804834c <main>: push %ebp
\n(gdb) si
\n0x0804834d 17 {
\n1: x\/i $pc 0x804834d <main+1>: mov %esp,%ebp
\n(gdb) si
\n0x0804834f in main () at gdb-sample.c:17
\n17 {
\n1: x\/i $pc 0x804834f <main+3>: sub $0x8,%esp
\n(gdb) si
\n0x08048352 17 {
\n1: x\/i $pc 0x8048352 <main+6>: and $0xfffffff0,%esp
\n(gdb) si
\n0x08048355 17 {
\n1: x\/i $pc 0x8048355 <main+9>: mov $0x0,%eax
\n(gdb) si
\n0x0804835a 17 {
\n1: x\/i $pc 0x804835a <main+14>: sub %eax,%esp
\n(gdb) si
\n19 n = 1;
\n1: x\/i $pc 0x804835c <main+16>: movl $0x1,0xfffffffc(%ebp)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6b64\u65f6\u53ef\u4ee5\u4f7f\u7528\u201ci r\u201d\u547d\u4ee4\u663e\u793a\u5bc4\u5b58\u5668\u4e2d\u7684\u5f53\u524d\u503c\u2014\u2014\u2014\u201ci r\u201d\u5373\u201cInfomation Register\u201d\uff1a<\/p>\n\n\n\n
(gdb) i r
\neax 0xbffff6a4 -1073744220
\necx 0x42015554 1107383636
\nedx 0x40016bc8 1073834952
\nebx 0x42130a14 1108544020
\nesp 0xbffff6a0 0xbffff6a0
\nebp 0xbffff6a8 0xbffff6a8
\nesi 0x40015360 1073828704
\nedi 0x80483f0 134513648
\neip 0x8048366 0x8048366
\neflags 0x386 902
\ncs 0x23 35
\nss 0x2b 43
\nds 0x2b 43
\nes 0x2b 43
\nfs 0x0 0
\ngs 0x33 51<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5f53\u7136\u4e5f\u53ef\u4ee5\u663e\u793a\u4efb\u610f\u4e00\u4e2a\u6307\u5b9a\u7684\u5bc4\u5b58\u5668\u503c\uff1a<\/p>\n\n\n\n
(gdb) i r eax
\neax 0xbffff6a4 -1073744220<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6700\u540e\u4e00\u4e2a\u8981\u4ecb\u7ecd\u7684\u547d\u4ee4\u662f\u201cq\u201d\uff0c\u9000\u51fa\uff08Quit\uff09GDB\u8c03\u8bd5\u73af\u5883\uff1a<\/p>\n

(gdb) q
\nThe program is running. Exit anyway? (y or n)<\/p>\n

\u5176\u5b83\u5907\u6ce8\uff1a<\/p>\n

\u8fdb\u5165\u4e00\u4e2a\u51fd\u6570\uff1as<\/strong><\/p>\n

\u9000\u51fa\u4e00\u4e2a\u51fd\u6570\uff1afinish<\/strong><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

LINUX\u4e0bGDB\u8c03\u8bd5 \u6807\u7b7e\uff1a\u00a0linu<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118,46,47],"class_list":["post-629","post","type-post","status-publish","format-standard","hentry","tag-02-","tag-gdb","tag-linux"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=629"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/629\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}