Debugging gdb忽略我的断点等等

我在gdb中设置了一个断点，但没有任何影响，程序继续运行

如果我正常地从shell运行程序，最终它会在syslog行483打印一些东西

所以，我在gdb中运行相同的程序，我在第483行设置了一个断点并点击run，但是程序没有在这一行停止，而是继续运行直到结束

...
Reading symbols from /usr/src/scannedonly-0.21/src/scannedonlyd_clamav...done.
(gdb) b 483
Breakpoint 1 at 0x804a8f1: file scannedonlyd_clamav.c, line 483.
(gdb) run -n
Starting program: /usr/src/scannedonly-0.21/src/scannedonlyd_clamav
[Thread debugging using libthread_db enabled]
HAVE_LIBCLAMAV_CL_INIT: 1
main
mark
mark2
mark3
about to load_engine()
load_engine()
LibClamAV Error: Can't load /usr/local/share/clamav/daily.cvd: Can't allocate memory

Program exited with code 02.
(gdb)

以下是来源的一部分：

 469 static struct cl_engine *load_engine()
 ...
 480         cl_engine_set_num(tmp, CL_ENGINE_MAX_SCANSIZE, (long long) 1024 * 1024 * 1024 * 5);
 481         cl_engine_set_num(tmp, CL_ENGINE_MAX_FILESIZE, (long long) 1024 * 1024 * 1024 * 5);
 482         if ((ret = cl_load(cl_retdbdir(), tmp, &sigs, CL_DB_STDOPT)) != CL_SUCCESS) {
 483                 syslog(LOG_CRIT, "WARNING2: Loading ClamAV database failed: %s", cl_strerror(ret));
 484                 cl_engine_free(tmp);
 485                 return NULL;

Reading symbols from /usr/src/scannedonly-0.21/src/scannedonlyd_clamav...done.
(gdb) b 1200
Breakpoint 1 at 0x804b97e: file scannedonlyd_clamav.c, line 1200.
(gdb) run -n
Starting program: /usr/src/scannedonly-0.21/src/scannedonlyd_clamav -n
[Thread debugging using libthread_db enabled]
HAVE_LIBCLAMAV_CL_INIT: 1
main
mark
mark2
mark3

Breakpoint 1, main (argc=2, argv=0xbffff794) at scannedonlyd_clamav.c:1200
1200    #endif
(gdb) list
1195    #ifdef HAVE_LIBCLAMAV_CL_INIT
1196            if (cl_init(CL_INIT_DEFAULT) != CL_SUCCESS) {
1197                    syslog(LOG_CRIT, "ABORT, failed to initialize libclamav");
1198                    exit(3);
1199            }
1200    #endif
1201            DEBUG_MSG("about to load_engine()\n");
1202            engine[0] = load_engine();
1203            engine[1] = NULL;
1204            current_engine = 0;
(gdb) n
1208            }
(gdb) list
1203            engine[1] = NULL;
1204            current_engine = 0;
1205            if (engine[0] == NULL) {
1206                    syslog(LOG_CRIT, "ABORT, exiting: no clam engine");
1207                    exit(2);
1208            }
1209            memset(&dbstat, 0, sizeof(struct cl_stat));
1210            cl_statinidir(cl_retdbdir(), &dbstat);
1211    #ifndef HAVE_LIBCLAMAV_CL_INIT
1212            memset(&limits, 0, sizeof(struct cl_limits));

如果我将一个断点设置为function load_engine，它看起来像是将一个断点设置为另一个源文件

好消息是，它在断点处停止，但随后它就像在块注释行493、497中运行一样：

Reading symbols from /usr/src/scannedonly-0.21/src/scannedonlyd_clamav...done.
(gdb) b load_engine
Breakpoint 1 at 0x80496f7: file /usr/include/bits/stdio2.h, line 105.
(gdb) run -n
Starting program: /usr/src/scannedonly-0.21/src/scannedonlyd_clamav -n
[Thread debugging using libthread_db enabled]
HAVE_LIBCLAMAV_CL_INIT: 1
main
mark
mark2
mark3
about to load_engine()

Breakpoint 1, load_engine () at /usr/include/bits/stdio2.h:105
105       return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ());
(gdb) n
493     #else
(gdb) n
105       return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ());
(gdb) n
load_engine()
497             }
(gdb) list
492     /*
493     #else
494             if ((ret = cl_load(cl_retdbdir(), &tmp, &sigs, CL_DB_STDOPT))) {
495                     syslog(LOG_CRIT, "WARNING: Loading ClamAV database failed: %s", cl_strerror(ret));
496                     return NULL;
497             }
498             if ((ret = cl_build(tmp))) {
499                     syslog(LOG_CRIT, "WARNING: Building ClamAV engine failed: %s", cl_strerror(ret));
500                     cl_free(tmp);
501                     return NULL;

如果我在main中的另一行1200处设置了断点，它将在正确的行停止，但在点击next时，程序流将跳过行。 下一步从第1200行到第1208行，虽然不应该这样。我正在发布一个列表，以便您也可以查看源代码：

 469 static struct cl_engine *load_engine()
 ...
 480         cl_engine_set_num(tmp, CL_ENGINE_MAX_SCANSIZE, (long long) 1024 * 1024 * 1024 * 5);
 481         cl_engine_set_num(tmp, CL_ENGINE_MAX_FILESIZE, (long long) 1024 * 1024 * 1024 * 5);
 482         if ((ret = cl_load(cl_retdbdir(), tmp, &sigs, CL_DB_STDOPT)) != CL_SUCCESS) {
 483                 syslog(LOG_CRIT, "WARNING2: Loading ClamAV database failed: %s", cl_strerror(ret));
 484                 cl_engine_free(tmp);
 485                 return NULL;

Reading symbols from /usr/src/scannedonly-0.21/src/scannedonlyd_clamav...done.
(gdb) b 1200
Breakpoint 1 at 0x804b97e: file scannedonlyd_clamav.c, line 1200.
(gdb) run -n
Starting program: /usr/src/scannedonly-0.21/src/scannedonlyd_clamav -n
[Thread debugging using libthread_db enabled]
HAVE_LIBCLAMAV_CL_INIT: 1
main
mark
mark2
mark3

Breakpoint 1, main (argc=2, argv=0xbffff794) at scannedonlyd_clamav.c:1200
1200    #endif
(gdb) list
1195    #ifdef HAVE_LIBCLAMAV_CL_INIT
1196            if (cl_init(CL_INIT_DEFAULT) != CL_SUCCESS) {
1197                    syslog(LOG_CRIT, "ABORT, failed to initialize libclamav");
1198                    exit(3);
1199            }
1200    #endif
1201            DEBUG_MSG("about to load_engine()\n");
1202            engine[0] = load_engine();
1203            engine[1] = NULL;
1204            current_engine = 0;
(gdb) n
1208            }
(gdb) list
1203            engine[1] = NULL;
1204            current_engine = 0;
1205            if (engine[0] == NULL) {
1206                    syslog(LOG_CRIT, "ABORT, exiting: no clam engine");
1207                    exit(2);
1208            }
1209            memset(&dbstat, 0, sizeof(struct cl_stat));
1210            cl_statinidir(cl_retdbdir(), &dbstat);
1211    #ifndef HAVE_LIBCLAMAV_CL_INIT
1212            memset(&limits, 0, sizeof(struct cl_limits));

我做错什么了吗？ 有什么想法吗

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顺便说一句，run-n只是在控制台中打印MSG的程序的一个参数。

问题毕竟是源代码中的\r字符。

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删除它们可以解决问题。

看起来您的源代码和程序不同步，例如代码中有一些更改，但没有重新编译程序。尝试重新编译，即makeclean和make。这是我开始时的想法，但没有任何区别。同样的问题。。。