GDB:运行到特定的断点
在GDB调试C ++代码:我有15个断点战略设置,但我不希望他们中的任何人激活,直到我打断点#2。 GDB中是否有run-until-breakpoint-n命令?
我发现自己做了以下两件事之一:
删除所有其他断点,以使#2完全存在,运行,重新添加所有断点; 要么
运行并反复continue
过去,直到我在#2看到第一个休息。
我想要类似run-until 2
,它会忽略除#2之外的所有其他断点,但不会删除它们。 这是否存在? 其他人是否有更好的方法来处理这个问题?
从版本7.0开始,GDB支持python脚本。 我写了一个简单的脚本,它将暂时禁用除指定编号以外的所有已启用断点并执行GDB run
命令。
将下面的代码添加到.gdbinit
文件中:
python
import gdb
class RunUntilCommand(gdb.Command):
"""Run until breakpoint and temporary disable other ones"""
def __init__ (self):
super(RunUntilCommand, self).__init__ ("run-until",
gdb.COMMAND_BREAKPOINTS)
def invoke(self, bp_num, from_tty):
try:
bp_num = int(bp_num)
except (TypeError, ValueError):
print "Enter breakpoint number as argument."
return
all_breakpoints = gdb.breakpoints() or []
breakpoints = [b for b in all_breakpoints
if b.is_valid() and b.enabled and b.number != bp_num and
b.visible == gdb.BP_BREAKPOINT]
for b in breakpoints:
b.enabled = False
gdb.execute("run")
for b in breakpoints:
b.enabled = True
RunUntilCommand()
end
您可以enable
和disable
断点,并且这些命令将接受一个范围。 在程序执行过程中的关键点,使用这些命令和范围。
我认为当你提到断点2时,你指的是断点的gdb编号。 这是一个简单的gdb会话示例:
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y 0x00001ddb in main at example.c:34
2 breakpoint keep y 0x00001e00 in main at example.c:39
3 breakpoint keep y 0x00001e15 in main at example.c:40
(gdb) disable 1-3
(gdb) enable 2
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep n 0x00001ddb in main at example.c:34
2 breakpoint keep y 0x00001e00 in main at example.c:39
3 breakpoint keep n 0x00001e15 in main at example.c:40
(gdb)
现在只有断点2被启用。 运行该程序,并在#2执行中断时,使用范围重新启用所有您想要的断点:
(gdb) enable 1-3
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y 0x00001ddb in main at example.c:34
2 breakpoint keep y 0x00001e00 in main at example.c:39
3 breakpoint keep y 0x00001e15 in main at example.c:40
您还可以混合使用断点编号和范围:
(gdb) disable 1 4 6-7
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep n 0x00001ddb in main at example.c:34
2 breakpoint keep y 0x00001e00 in main at example.c:39
3 breakpoint keep y 0x00001e15 in main at example.c:40
4 breakpoint keep n 0x00001e4f in main at example.c:43
5 breakpoint keep y 0x00001e4f in main at example.c:44
6 breakpoint keep n 0x00001e5e in main at example.c:45
7 breakpoint keep n 0x00001e5e in main at example.c:46
比删除所有其他断点稍微痛苦一点就是disable
它们。 这样,您不必重新输入与断点关联的所有内容以将其恢复,只需通过数字重新enable
。