mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
57 lines
2.8 KiB
C
57 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2021 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/sysv/consts/ptrace.h"
|
|
#include "libc/calls/syscall-sysv.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/describeflags.internal.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
/**
|
|
* Traces process.
|
|
*
|
|
* This API is terrible. Consider using sys_ptrace().
|
|
*
|
|
* @param request can be PTRACE_xxx
|
|
* @note de facto linux only atm
|
|
* @vforksafe
|
|
*/
|
|
long ptrace(int request, ...) {
|
|
// TODO(jart): FreeBSD addr and data args are different
|
|
int pid;
|
|
va_list va;
|
|
bool ispeek;
|
|
long rc, peek, addr, *data;
|
|
va_start(va, request);
|
|
pid = va_arg(va, int);
|
|
addr = va_arg(va, long);
|
|
data = va_arg(va, long *);
|
|
va_end(va);
|
|
if (request == -1) {
|
|
rc = einval(); /* see consts.sh */
|
|
} else {
|
|
ispeek = IsLinux() && request - 1u < 3;
|
|
if (ispeek) data = &peek;
|
|
rc = __sys_ptrace(request, pid, addr, data);
|
|
if (rc != -1 && ispeek) rc = peek;
|
|
}
|
|
STRACE("ptrace(%s, %d, %p, %p) → %p% m", DescribePtrace(request), pid, addr,
|
|
data, rc);
|
|
return rc;
|
|
}
|