mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-17 11:02:42 +00:00
68c7c9c1e0
- Use good ELF technique in cosmo_dlopen() - Make strerror() conform more to other libc impls - Introduce __clear_cache() and use it in cosmo_dlopen() - Remove libc/fmt/fmt.h header (trying to kill off LIBC_FMT)
90 lines
3.7 KiB
C
90 lines
3.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/calls/calls.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/weaken.h"
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#include "libc/log/backtrace.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/nexgen32e/gc.internal.h"
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#include "libc/nexgen32e/stackframe.h"
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#include "libc/runtime/memtrack.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/symbols.internal.h"
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#include "libc/str/str.h"
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#include "libc/thread/tls.h"
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#define LIMIT 100
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/**
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* Prints stack frames with symbols.
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*
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* PrintBacktraceUsingSymbols(STDOUT_FILENO, NULL, GetSymbolTable());
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*
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* @param f is output stream
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* @param bp is rbp which can be NULL to detect automatically
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* @param st is open symbol table for current executable
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* @return -1 w/ errno if error happened
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*/
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dontinstrument dontasan int PrintBacktraceUsingSymbols(
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int fd, const struct StackFrame *bp, struct SymbolTable *st) {
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size_t gi;
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intptr_t addr;
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int i, symbol, addend;
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struct Garbages *garbage;
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const struct StackFrame *frame;
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(void)gi;
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if (!bp) bp = __builtin_frame_address(0);
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garbage = __tls_enabled ? __get_tls()->tib_garbages : 0;
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gi = garbage ? garbage->i : 0;
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for (i = 0, frame = bp; frame; frame = frame->next) {
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if (kisdangerous(frame)) {
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kprintf("<dangerous frame>\n");
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break;
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}
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if (++i == LIMIT) {
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kprintf("<truncated backtrace>\n");
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break;
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}
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addr = frame->addr;
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#ifdef __x86_64__
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if (gi && addr == (intptr_t)_weaken(__gc)) {
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do {
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--gi;
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} while ((addr = garbage->p[gi].ret) == (intptr_t)_weaken(__gc));
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}
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#endif
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if (addr) {
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if ((symbol = __get_symbol(st, addr)) != -1) {
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addend = addr - st->addr_base;
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addend -= st->symbols[symbol].x;
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} else {
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addend = 0;
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}
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} else {
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symbol = 0;
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addend = 0;
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}
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kprintf("%012lx %lx %s%+d\n", frame, addr, __get_symbol_name(st, symbol),
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addend);
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}
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return 0;
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}
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