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@@ -0,0 +1,102 @@
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+// stacktrace.h (c) 2008, Timo Bingmann from http://idlebox.net/
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+// published under the WTFPL v2.0
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+
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+#ifndef _STACKTRACE_H_
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+#define _STACKTRACE_H_
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <execinfo.h>
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+#include <cxxabi.h>
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+
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+/** Print a demangled stack backtrace of the caller function to FILE* out. */
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+static inline void print_stacktrace( FILE *out = stdout, unsigned int max_frames = 3 )
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+{
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+ fprintf( out, "stack trace:\n" );
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+
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+ // storage array for stack trace address data
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+ void* addrlist[ max_frames + 1 ];
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+
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+ // retrieve current stack addresses
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+ int addrlen = backtrace( addrlist, sizeof( addrlist ) / sizeof( void* ) );
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+
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+ if( addrlen == 0 )
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+ {
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+ fprintf( out, " <empty, possibly corrupt>\n" );
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+ return;
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+ }
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+
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+ // resolve addresses into strings containing "filename(function+address)",
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+ // this array must be free()-ed
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+ char** symbollist = backtrace_symbols( addrlist, addrlen );
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+
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+ // allocate string which will be filled with the demangled function name
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+ size_t funcnamesize = 256;
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+ char* funcname = (char*)malloc( funcnamesize );
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+
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+ // iterate over the returned symbol lines. skip the first, it is the
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+ // address of this function.
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+ for( int i = 1; i < addrlen; i++ )
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+ {
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+ char *begin_name = 0, *begin_offset = 0, *end_offset = 0;
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+
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+ // find parentheses and +address offset surrounding the mangled name:
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+ // ./module(function+0x15c) [0x8048a6d]
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+ for( char *p = symbollist[ i ]; *p; ++p )
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+ {
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+ if( *p == '(' )
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+ begin_name = p;
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+ else if( *p == '+' )
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+ begin_offset = p;
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+ else if( *p == ')' && begin_offset )
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+ {
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+ end_offset = p;
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+ break;
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+ }
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+ }
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+
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+ if( begin_name && begin_offset && end_offset
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+ && begin_name < begin_offset )
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+ {
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+ *begin_name++ = '\0';
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+ *begin_offset++ = '\0';
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+ *end_offset = '\0';
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+
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+ // mangled name is now in [begin_name, begin_offset) and caller
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+ // offset in [begin_offset, end_offset). now apply
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+ // __cxa_demangle():
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+
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+ int status;
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+ char* ret = abi::__cxa_demangle( begin_name,
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+ funcname, &funcnamesize, &status );
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+ if( status == 0 )
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+ {
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+ funcname = ret; // use possibly realloc()-ed string
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+ char line[ 256 ];
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+ sprintf( line, " %s : %s+%s\n",
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+ symbollist[ i ], funcname, begin_offset );
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+ int y = 0;
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+ }
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+ else
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+ {
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+ // demangling failed. Output function name as a C function with
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+ // no arguments.
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+ char line[ 256 ];
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+ sprintf( line, " %s : %s()+%s\n",
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+ symbollist[ i ], begin_name, begin_offset );
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+ int x = 0;
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+ }
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+ }
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+ else
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+ {
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+ // couldn't parse the line? print the whole line.
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+ char line[ 256 ];
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+ sprintf( line, " %s\n", symbollist[ i ] );
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+ int x = 0;
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+ }
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+ }
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+
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+ free( funcname );
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+ free( symbollist );
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+}
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+
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+#endif // _STACKTRACE_H_
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kolja