Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 1 | #include <corkscrew/backtrace.h> |
Elliott Hughes | 04607b8 | 2012-05-18 16:53:22 -0700 | [diff] [blame] | 2 | #include <corkscrew/symbol_table.h> |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 3 | #include <stdio.h> |
| 4 | #include <stdlib.h> |
| 5 | |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 6 | int do_backtrace(float /* just to test demangling */) { |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 7 | const size_t MAX_DEPTH = 32; |
| 8 | backtrace_frame_t* frames = (backtrace_frame_t*) malloc(sizeof(backtrace_frame_t) * MAX_DEPTH); |
| 9 | ssize_t frame_count = unwind_backtrace(frames, 0, MAX_DEPTH); |
| 10 | fprintf(stderr, "frame_count=%d\n", (int) frame_count); |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 11 | if (frame_count <= 0) { |
| 12 | return frame_count; |
| 13 | } |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 14 | |
| 15 | backtrace_symbol_t* backtrace_symbols = (backtrace_symbol_t*) malloc(sizeof(backtrace_symbol_t) * frame_count); |
| 16 | get_backtrace_symbols(frames, frame_count, backtrace_symbols); |
| 17 | |
| 18 | for (size_t i = 0; i < (size_t) frame_count; ++i) { |
| 19 | char line[MAX_BACKTRACE_LINE_LENGTH]; |
| 20 | format_backtrace_line(i, &frames[i], &backtrace_symbols[i], |
| 21 | line, MAX_BACKTRACE_LINE_LENGTH); |
Elliott Hughes | 04607b8 | 2012-05-18 16:53:22 -0700 | [diff] [blame] | 22 | if (backtrace_symbols[i].symbol_name != NULL) { |
| 23 | // get_backtrace_symbols found the symbol's name with dladdr(3). |
| 24 | fprintf(stderr, " %s\n", line); |
| 25 | } else { |
| 26 | // We don't have a symbol. Maybe this is a static symbol, and |
| 27 | // we can look it up? |
| 28 | symbol_table_t* symbols = NULL; |
| 29 | if (backtrace_symbols[i].map_name != NULL) { |
| 30 | symbols = load_symbol_table(backtrace_symbols[i].map_name); |
| 31 | } |
| 32 | const symbol_t* symbol = NULL; |
| 33 | if (symbols != NULL) { |
| 34 | symbol = find_symbol(symbols, frames[i].absolute_pc); |
| 35 | } |
| 36 | if (symbol != NULL) { |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 37 | int offset = frames[i].absolute_pc - symbol->start; |
Elliott Hughes | 04607b8 | 2012-05-18 16:53:22 -0700 | [diff] [blame] | 38 | fprintf(stderr, " %s (%s%+d)\n", line, symbol->name, offset); |
| 39 | } else { |
| 40 | fprintf(stderr, " %s (\?\?\?)\n", line); |
| 41 | } |
Elliott Hughes | 6b659ae | 2012-05-22 16:02:35 -0700 | [diff] [blame] | 42 | free_symbol_table(symbols); |
Elliott Hughes | 04607b8 | 2012-05-18 16:53:22 -0700 | [diff] [blame] | 43 | } |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | free_backtrace_symbols(backtrace_symbols, frame_count); |
| 47 | free(backtrace_symbols); |
| 48 | free(frames); |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 49 | return frame_count; |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 50 | } |
| 51 | |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 52 | struct C { |
| 53 | int g(int i); |
| 54 | }; |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 55 | |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 56 | __attribute__ ((noinline)) int C::g(int i) { |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 57 | if (i == 0) { |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 58 | return do_backtrace(0.1); |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 59 | } |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 60 | return g(i - 1); |
| 61 | } |
| 62 | |
| 63 | extern "C" __attribute__ ((noinline)) int f() { |
| 64 | C c; |
| 65 | return c.g(5); |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | int main() { |
Elliott Hughes | 8905405 | 2012-06-13 14:21:23 -0700 | [diff] [blame] | 69 | flush_my_map_info_list(); |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 70 | f(); |
Elliott Hughes | 8905405 | 2012-06-13 14:21:23 -0700 | [diff] [blame] | 71 | |
| 72 | flush_my_map_info_list(); |
| 73 | f(); |
| 74 | |
Elliott Hughes | bfec3a3 | 2012-05-24 19:03:07 -0700 | [diff] [blame] | 75 | return 0; |
Elliott Hughes | 71363a8 | 2012-05-18 11:56:17 -0700 | [diff] [blame] | 76 | } |