mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-17 02:52:40 +00:00
2ab9e9f7fd
- Introduce portable sched_getcpu() api - Support GCC's __target_clones__ feature - Make fma() go faster on x86 in default mode - Remove some asan checks from core libraries - WinMain() now ensures $HOME and $USER are defined
75 lines
3.3 KiB
C
75 lines
3.3 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/calls/calls.h"
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#include "libc/intrin/safemacros.internal.h"
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#include "libc/log/gdb.h"
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#include "libc/log/log.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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/**
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* Attaches GDB temporarily, to do something like print a variable.
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*/
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relegated int(gdbexec)(const char *cmd) {
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int pid;
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struct StackFrame *bp;
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const char *se, *elf, *gdb;
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char pidstr[11], breakcmd[40];
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if (!(gdb = GetGdbPath())) return -1;
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snprintf(pidstr, sizeof(pidstr), "%u", getpid());
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if ((elf = FindDebugBinary())) {
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se = "-se";
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} else {
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se = "-q";
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elf = "-q";
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}
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bp = __builtin_frame_address(0);
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sprintf(breakcmd, "%s *%#lx", "break", (unsigned long)bp->addr);
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if (!(pid = vfork())) {
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execv(gdb, (char *const[]){
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"gdb",
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"--nx",
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"--nh",
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"-p",
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pidstr,
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(char *)se,
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(char *)elf,
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"-ex",
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"set osabi GNU/Linux",
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"-ex",
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"set complaints 0",
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"-ex",
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"set confirm off",
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"-ex",
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"set var g_gdbsync = 1",
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"-q",
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"-ex",
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breakcmd,
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"-ex",
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(char *)cmd,
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"-ex",
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"quit",
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NULL,
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});
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abort();
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}
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return SYNCHRONIZE_DEBUGGER(pid);
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}
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