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From: Simon Sobisch <simonsobisch@gnu.org>
To: gdb@sourceware.org
Subject: How to create maintenance breakpoints for running programs?
Date: Thu, 28 Oct 2021 11:35:02 +0200	[thread overview]
Message-ID: <6b1622f3-ef58-642a-b320-1ebfeae59b98@gnu.org> (raw)

We can create  maintenance breakpoints with 
gdb.Breakpoint(internal=True), which is good.

I've now stumbled over the problem that this _does_ work with not 
running / attached targets but raises an error message "No symbol table 
is loaded.  Use the "file" command."

the breakpoint is then shown under "maint info break" as PENDING (as 
expected) and is resolved on "start".


What I _want_ to achieve is the same as one can see with "plain GDB":

$ gdb -q
(gdb) maint info break
No breakpoints or watchpoints.
(gdb) file prog
(gdb) star
...
(gdb) maint info break
(gdb) maint info break
Num     Type                  Disp Enb Address            What
-1      shlib events          keep y   0x00007ffff7fe2590 
<__GI__dl_debug_state> inf 1
-1.1                               y   0x00007ffff7fe2590 
<__GI__dl_debug_state> inf 1
-2      longjmp master        keep n   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-2.1                               y   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-3      longjmp master        keep n   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-3.1                               y   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-4      longjmp master        keep n   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-4.1                               y   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-5      longjmp master        keep n   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-5.1                               y   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-6      longjmp master        keep n   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-6.1                               y   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-7      longjmp master        keep n   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-7.1                               y   0x00007ffff7db3950 
<__libc_siglongjmp> inf 1
-8      std::terminate master keep n   0x00007ffff59369c0 
<std::terminate()> inf 1
-8.1                               y   0x00007ffff59369c0 
<std::terminate()> inf 1


I'd like to do the same - is there any event I can register to so that I 
don't create a <PENDING> breakpoint and an error but instead create the 
breakpoint when GDB actually has a running program?

Thanks for any insights,
Simon

             reply	other threads:[~2021-10-28  9:35 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-28  9:35 Simon Sobisch [this message]
2021-11-02 16:43 ` Simon Sobisch

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