For the example given, the backtrace command of gdb-8.3 already displays 80%
of the requested information for code compiled by g++-9.3.1 using -g.
The request:
> If compiled with -g, the debug output will display
> (1) C/C++ names down into the standard library
> (2) source code names and signatures
> (3) including template instantiations
> (4) file names
> (5) line numbers
(gdb) backtrace
#0 __GI_raise (sig=sig@entry=0x6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007ffff7aac895 in __GI_abort () at abort.c:79
#2 0x0000000000401144 in bar () at traceback-test.c:6
#3 0x0000000000401154 in foo<int> () at traceback-test.c:12
#4 0x0000000000401134 in main () at traceback-test.c:17
valgrind-3.17.0:
==16820== Process terminating with default action of signal 6 (SIGABRT):
dumping core
==16820== at 0x4BFCE35: raise (raise.c:51)
==16820== by 0x4BE7894: abort (abort.c:79)
==16820== by 0x401143: bar() (traceback-test.c:6)
==16820== by 0x401153: void foo<int>(int) (traceback-test.c:12)
==16820== by 0x401133: main (traceback-test.c:17)
In this example, item (3) is the only essential difference.
valgrind:
void foo<int>(int) (traceback-test.c:12)
contains result type and argument type, while
gdb:
in foo<int> () at traceback-test.c:12
lacks "void" and "(int)".
For items (1), (2), (4), and (5) the gdb output contains the same information
as the valgrind output. In addition, gdb gives more information for (1):
the complete internal path for standard library code
../sysdeps/unix/sysv/linux/raise.c:50
in contrast to valgrind's
(raise.c:51)
So, any request for a better backtrace should be much more explicit than what
was posted originally.
On 5/26/21, Martin Licht via Valgrind-users wrote:
Addressing the first point: what Valgrind's tracer does better than others is
fetching more source code information and semantics. This can shown immediately
with the following example:
```
#include <assert.h>
#include <stdlib.h>
inline void bar()
{
abort();
}
template<typename T>
inline void foo(T)
{
bar();
}
int main()
{
foo(5);
return 0;
}
```
If compiled with -g, the debug output will display (1) C/C++ names down into
the standard library (2) source code names and signatures (3) including
template instantiations (4) file names (5) line numbers, among other things. I
would be great to have a stack tracer like that.
The prettiest alternatives without Valgrind go along the lines of
https://eli.thegreenplace.net/2015/programmatic-access-to-the-call-stack-in-c/
using libunwind and cxxabi. This still is not as close to the source as
Valgrind's output.
_______________________________________________
Valgrind-users mailing list
Valgrind-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/valgrind-users
