79 lines
3.2 KiB
C
79 lines
3.2 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/safemacros.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/hefty/spawn.h"
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#include "libc/fmt/fmt.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.h"
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/**
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* Attachs GDB temporarilly, to do something like print a variable.
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*/
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int(gdbexec)(const char *cmd) {
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int ttyin, ttyout;
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struct StackFrame *bp;
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intptr_t continuetoaddr;
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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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continuetoaddr = bp->addr;
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snprintf(breakcmd, sizeof(breakcmd), "%s *%#p", "break", bp->addr);
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char *const args[] = {
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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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se,
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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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cmd,
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"-ex",
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"quit",
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NULL,
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};
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return SYNCHRONIZE_DEBUGGER(spawnve(0, NULL, gdb, args, environ));
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}
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