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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
62 lines
2.9 KiB
C
62 lines
2.9 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 2022 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/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/likely.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/runtime/runtime.h"
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#define IsPeek(request) (IsLinux() && (request)-1u < 3)
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/**
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* Traces process.
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*
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* @param op can be PTRACE_xxx
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* @param pid is child process id
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* @param addr points inside child address space
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* @param data is address of output word when peeking
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* @note de facto linux only
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* @vforksafe
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*/
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int sys_ptrace(int op, ...) {
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va_list va;
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int rc, pid;
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long addr, *data;
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va_start(va, op);
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pid = va_arg(va, int);
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addr = va_arg(va, long);
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data = va_arg(va, long *);
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va_end(va);
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rc = __sys_ptrace(op, pid, addr, data);
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#if SYSDEBUG
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if (UNLIKELY(__strace > 0) && strace_enabled(0) > 0) {
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if (rc != -1 && IsPeek(op) && data) {
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STRACE("sys_ptrace(%s, %d, %p, [%p]) → %p% m", DescribePtrace(op), pid,
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addr, *data, rc);
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} else {
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STRACE("sys_ptrace(%s, %d, %p, %p) → %p% m", DescribePtrace(op), pid,
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addr, data, rc);
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}
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}
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#endif
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return rc;
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}
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