我正在使用gdb-7.11.1,并在嵌入式powerpc系统上收到此消息。更多背景情况是,我使用的libpthread已经剥离了所有非动态符号,包括
至于我的问题,gdb说它将无法调试线程,但从下面的证据看似乎可以。难道我只是误解了“线程调试”的意思吗?(您看到的 ?? 自然是由于 libpthread 中缺少符号表引起的)
nptl_version
,这是 libthread_db 用来确保其与 libpthread 兼容的符号。至于我的问题,gdb说它将无法调试线程,但从下面的证据看似乎可以。难道我只是误解了“线程调试”的意思吗?(您看到的 ?? 自然是由于 libpthread 中缺少符号表引起的)
(gdb) break fn2
Breakpoint 1 at 0x1000052c: file test.c, line 7.
(gdb) run
Starting program: /tmp/test
warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.
[New LWP 21312]
[New LWP 21313]
[New LWP 21314]
[New LWP 21315]
[New LWP 21316]
[New LWP 21317]
[Switching to LWP 21315]
Thread 5 hit Breakpoint 1, fn2 () at test.c:7
7 test.c: No such file or directory.
(gdb) thread apply all bt
Thread 7 (LWP 21317):
#0 0x0fdcf030 in ?? () from /lib/libpthread.so.0
#1 0x0fdc892c in pthread_mutex_lock () from /lib/libpthread.so.0
#2 0x00000000 in ?? ()
Thread 6 (LWP 21316):
#0 0x0fdcf030 in ?? () from /lib/libpthread.so.0
#1 0x0fdc892c in pthread_mutex_lock () from /lib/libpthread.so.0
#2 0x00000000 in ?? ()
Thread 5 (LWP 21315):
#0 fn2 () at test.c:7
#1 0x0fdc6d8c in ?? () from /lib/libpthread.so.0
#2 0x0fd26074 in clone () from /lib/libc.so.6
Thread 4 (LWP 21314):
#0 0x0fdcf030 in ?? () from /lib/libpthread.so.0
#1 0x0fdc892c in pthread_mutex_lock () from /lib/libpthread.so.0
#2 0x00000000 in ?? ()
Thread 3 (LWP 21313):
#0 0x0fdcf030 in ?? () from /lib/libpthread.so.0
#1 0x0fdc892c in pthread_mutex_lock () from /lib/libpthread.so.0
#2 0x00000000 in ?? ()
Thread 2 (LWP 21312):
#0 0x0fdcefdc in ?? () from /lib/libpthread.so.0
#1 0x0fdc892c in pthread_mutex_lock () from /lib/libpthread.so.0
#2 0x00000000 in ?? ()
Thread 1 (LWP 21309):
#0 0x0fd26038 in clone () from /lib/libc.so.6
#1 0x0fdc5f2c in ?? () from /lib/libpthread.so.0
#2 0x0fde6150 in ?? () from /lib/libpthread.so.0
#3 0x0fdc6424 in pthread_create () from /lib/libpthread.so.0
#4 0x100006a4 in main () at test.c:23
(gdb)
set solib-search-path
或set libthread-db-search-path
命令来让 GDB 找到正确的共享库。 - tofro