64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/calls/calls.h"
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#include "libc/log/backtrace.h"
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#include "libc/log/log.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/gc.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/symbols.h"
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#include "libc/stdio/stdio.h"
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#include "libc/sysv/consts/fileno.h"
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/*
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Your executables will try to find the addr2line tool, which is needed
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to decrypt gcc debug information, enabling backtraces like this:
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0x0000000000403a7a: Hello at examples/backtrace.c:31
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0x0000000000403ac3: World at examples/backtrace.c:38
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0x0000000000401608: main at examples/backtrace.c:42
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0x0000000000401379: _start at libc/crt/crt.S:61
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If that doesn't work, then your αcτµαlly pδrταblε εxεcµταblε will use
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its own builtin fallback solution:
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0000ac2fa7e0 000000403a9b Hello+0x49
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0000ac2fa7f0 000000403ac4 World+0x22
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0000ac2fa800 000000401609 main+0x7
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0000ac2fa810 00000040137a _start+0x63
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This is guaranteed to work if the .com.dbg file can be found.
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Otherwise it'll print numbers:
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0000268a8390 000000403a90 (null)+0x403a8f
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0000268a83a0 000000403aef (null)+0x403aee
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0000268a83b0 0000004015fe (null)+0x4015fd
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0000268a83c0 00000040137a (null)+0x401379
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*/
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void hello(void) {
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gc(malloc(1));
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ShowBacktrace(STDOUT_FILENO, NULL);
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setenv("ADDR2LINE", "", true);
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ShowBacktrace(STDOUT_FILENO, NULL);
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}
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void world(void) {
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gc(malloc(1));
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hello();
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}
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int main(int argc, char *argv[]) {
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world();
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return 0;
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}
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