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https://github.com/jart/cosmopolitan.git
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f24c854b28
This change adds tests for the new memory manager code particularly with its windows support. Function call tracing now works reliably on Silicon since our function hooker was missing new Apple self-modifying code APIs Many tests that were disabled a long time ago on aarch64 are reactivated by this change, now that arm support is on equal terms with x86. There's been a lot of places where ftrace could cause deadlocks, which have been hunted down across all platforms thanks to new tests. A bug in Windows's kill() function has been identified.
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 et 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/struct/sigaction.h"
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#include "libc/calls/struct/sigaltstack.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/log/internal.h"
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#include "libc/mem/mem.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/sysv/consts/sa.h"
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#include "libc/sysv/consts/sig.h"
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#ifndef TINY
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__static_yoink("zipos"); // for symtab
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__static_yoink("__die"); // for backtracing
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__static_yoink("ShowBacktrace"); // for backtracing
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__static_yoink("GetSymbolTable"); // for backtracing
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__static_yoink("PrintBacktraceUsingSymbols"); // for backtracing
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__static_yoink("__demangle"); // for pretty c++ symbols
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__static_yoink("malloc_inspect_all"); // for asan memory origin
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__static_yoink("GetSymbolByAddr"); // for asan memory origin
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#endif
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static void InstallCrashHandler(int sig, int flags) {
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struct sigaction sa;
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sigemptyset(&sa.sa_mask);
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sigaddset(&sa.sa_mask, SIGQUIT);
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sigaddset(&sa.sa_mask, SIGFPE);
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sigaddset(&sa.sa_mask, SIGILL);
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sigaddset(&sa.sa_mask, SIGSEGV);
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sigaddset(&sa.sa_mask, SIGTRAP);
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sigaddset(&sa.sa_mask, SIGBUS);
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sigaddset(&sa.sa_mask, SIGABRT);
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sa.sa_flags = SA_SIGINFO | flags;
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#ifdef TINY
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sa.sa_sigaction = __minicrash;
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#else
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GetSymbolTable();
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sa.sa_sigaction = __oncrash;
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#endif
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unassert(!sigaction(sig, &sa, 0));
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}
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/**
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* Installs crash signal handlers.
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*
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* Normally, only functions calling die() will print backtraces. This
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* function may be called at program startup to install handlers that
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* will display similar information, for most types of crashes.
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*
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* - Backtraces
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* - CPU state printout
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* - Automatic debugger attachment
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*
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* Another trick this function enables, is you can press CTRL+\ to open
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* the debugger GUI at any point while the program is running. It can be
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* useful, for example, if a program is caught in an infinite loop.
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*/
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void ShowCrashReports(void) {
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struct sigaltstack ss;
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static char crashstack[65536];
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FindDebugBinary();
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ss.ss_flags = 0;
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ss.ss_size = sizeof(crashstack);
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ss.ss_sp = crashstack;
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unassert(!sigaltstack(&ss, 0));
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InstallCrashHandler(SIGQUIT, 0);
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InstallCrashHandler(SIGTRAP, 0);
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InstallCrashHandler(SIGFPE, 0);
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InstallCrashHandler(SIGILL, 0);
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InstallCrashHandler(SIGBUS, 0);
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InstallCrashHandler(SIGABRT, 0);
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InstallCrashHandler(SIGSEGV, SA_ONSTACK);
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}
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