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#include <dlfcn.h>
#include <stddef.h>
#include <stdlib.h>
#define _frame_level(addr_buf, curr, frame, size) \
if(__builtin_frame_address(frame) != NULL && (curr = __builtin_return_address(frame)) > 0x1000 && frame <= size) addr_buf[frame] = curr; \
else return size;
int backtrace(void **addr_buf, int size)
{
void *curr;
_frame_level(addr_buf, curr, 0, size)
_frame_level(addr_buf, curr, 1, size)
_frame_level(addr_buf, curr, 2, size)
_frame_level(addr_buf, curr, 3, size)
_frame_level(addr_buf, curr, 4, size)
_frame_level(addr_buf, curr, 5, size)
_frame_level(addr_buf, curr, 6, size)
_frame_level(addr_buf, curr, 7, size)
_frame_level(addr_buf, curr, 8, size)
_frame_level(addr_buf, curr, 9, size)
return 9;
}
char **backtrace_symbols(void * const *addr_buf, int size)
{
char **result = calloc(sizeof(char *), size);
if(result == NULL) return result;
for(int next = 0; next < size; next++)
{
Dl_info info;
int err = dladdr(addr_buf[next], &info);
if(err != 0)
{
result[next] = "??:0";
} else {
result[next] = info.dli_sname;
}
}
return result;
}
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