Unable to print function names in stacktrace

[Hitesh Patel]

hi friends,

I am using backtrace() and backtrace_symbols() functions from execinfo.h.

when I print backtrace I get only hex address of every function call. I know
that to get functions names, binary format of executable file must be ELF.

I set -rdynamic option during compilation but I don't get functions names.
is there any other otion we have to set?

pls help me.

my code is as follows

void *btArray[128];
int btSize;
char** btSymbols;

cout << endl << "########## Backtrace ##########" << endl;
btSize = backtrace(btArray, sizeof(btArray) / sizeof(void *));
cout << "Number of elements in backtrace: " << btSize << endl;

if (btSize > 0) {

btSymbols = backtrace_symbols(btArray, btSize);
if (btSymbols) {
for (int i = btSize - 1; i >= 0; --i) {
cout << btSymbols << endl;
}
}
}

I am using
gcc -v
Using built-in specs.
Configured with: FreeBSD/i386 system compiler
Thread model: posix
gcc version 3.2.2 [FreeBSD] 20030205 (release)

Thanks in advance.

 

[Victor Bazarov]

I am using backtrace() and backtrace_symbols() functions from execinfo.h.
[...]

Neither 'backtrace' nor 'backtrace_symbols' is a standard function.
Perhaps you should ask in a newsgroup where they would be on topic,
like gnu.gcc.help or the newsgroup for FreeBDS.

 

[Hitesh Patel]

I am using backtrace() and backtrace_symbols() functions from execinfo.h.
[...]

Neither 'backtrace' nor 'backtrace_symbols' is a standard function.
Perhaps you should ask in a newsgroup where they would be on topic,
like gnu.gcc.help or the newsgroup for FreeBDS.

I found one utility named addr2line in freeBSD. which gives function name,
file name and line number if code is compiled in debug mode. otherwise only
give function name.

Hitesh Patel