mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
b45d50b690
- Fix build flakes - Polyfill SIGWINCH on Windows - Fix an execve issue on Windows - Make strerror show more information - Improve cmd.exe setup/teardown on Windows - Support bracketed paste mode in Blinkenlights - Show keyboard shortcuts in Blinkenlights status bar - Fixed copy_file_range() and copyfile() w/ zip filesystem - Size optimize GetDosArgv() to keep life.com 12kb in size - Improve Blinkenlights ability to load weird ELF executables - Fix program_executable_name and add GetInterpreterExecutableName - Make Python in tiny mode fail better if docstrings are requested - Update Python test exclusions in tiny* modes such as tinylinux - Add bulletproof unbreakable kprintf() troubleshooting function - Remove "oldskool" keyword from ape.S for virus scanners - Fix issue that caused backtraces to not print sometimes - Improve Blinkenlights serial uart character i/o - Make clock_gettime() not clobber errno on xnu - Improve sha256 cpuid check for old computers - Integrate some bestline linenoise fixes - Show runit process names better in htop - Remove SIGPIPE from ShowCrashReports() - Make realpath() not clobber errno - Avoid attaching GDB on non-Linux - Improve img.com example
91 lines
4.2 KiB
C
91 lines
4.2 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/alg/bisectcarleft.internal.h"
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#include "libc/assert.h"
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#include "libc/bits/weaken.h"
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#include "libc/calls/calls.h"
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#include "libc/fmt/fmt.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/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/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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#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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noinstrument noasan int PrintBacktraceUsingSymbols(int fd,
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const struct StackFrame *bp,
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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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if (!bp) bp = __builtin_frame_address(0);
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garbage = weaken(__garbage);
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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 (!IsValidStackFramePointer(frame)) {
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kprintf("%p corrupt frame pointer%n", frame);
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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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if (addr == weakaddr("__gc")) {
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do {
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--gi;
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} while ((addr = garbage->p[gi].ret) == weakaddr("__gc"));
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}
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/*
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* we subtract one to handle the case of noreturn functions with a
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* call instruction at the end, since %rip in such cases will point
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* to the start of the next function. generally %rip always points
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* to the byte after the instruction. one exception is in case like
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* __restore_rt where the kernel creates a stack frame that points
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* to the beginning of the function.
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*/
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if ((symbol = __get_symbol(st, addr - 1)) != -1 ||
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(symbol = __get_symbol(st, addr - 0)) != -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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kprintf("%012lx %012lx %s%+d\r%n", frame, addr,
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__get_symbol_name(st, symbol), addend);
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}
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return 0;
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}
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