ptrace.cpp revision c3f114037dbf028896310609fd28cf2b3da99c4d
10f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare/* 20f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * Copyright (C) 2008 The Android Open Source Project 30f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * All rights reserved. 40f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * 50f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * Redistribution and use in source and binary forms, with or without 60f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * modification, are permitted provided that the following conditions 70f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * are met: 80f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * * Redistributions of source code must retain the above copyright 90f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * notice, this list of conditions and the following disclaimer. 100f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * * Redistributions in binary form must reproduce the above copyright 110f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * notice, this list of conditions and the following disclaimer in 120f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * the documentation and/or other materials provided with the 130f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * distribution. 140f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * 150f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 160f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 170f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 180f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 190f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 200f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 210f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 220f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 230f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 240f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 250f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 260f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * SUCH DAMAGE. 270f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare */ 28c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes 290f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare#include <sys/types.h> 300f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare#include <sys/ptrace.h> 310f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare 32c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughesextern "C" long __ptrace(int request, pid_t pid, void* addr, void* data); 330f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare 34c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hugheslong ptrace(int request, pid_t pid, void* addr, void* data) { 35c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes switch (request) { 36c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes case PTRACE_PEEKUSR: 37c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes case PTRACE_PEEKTEXT: 38c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes case PTRACE_PEEKDATA: 39c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes { 40c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes long word; 41c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes long ret = __ptrace(request, pid, addr, &word); 42c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes if (ret == 0) { 43c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes return word; 44c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes } else { 45c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes // __ptrace already set errno for us. 46c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes return -1; 47c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes } 480f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare } 49c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes 50c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes default: 51c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes return __ptrace(request, pid, addr, data); 52c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes } 530f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare} 540f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare 550f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare/* 560f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * Hook for gdb to get notified when a thread is created 570f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare */ 583435fc600d8d78b63a355b519667c23f56d6611bJames Rose#ifdef __i386__ 593435fc600d8d78b63a355b519667c23f56d6611bJames Rose#define ATTRIBUTES __attribute__((noinline)) __attribute__((fastcall)) 603435fc600d8d78b63a355b519667c23f56d6611bJames Rose#else 613435fc600d8d78b63a355b519667c23f56d6611bJames Rose#define ATTRIBUTES __attribute__((noinline)) 623435fc600d8d78b63a355b519667c23f56d6611bJames Rose#endif 633435fc600d8d78b63a355b519667c23f56d6611bJames Rose 64c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughesextern "C" void _thread_created_hook(pid_t) ATTRIBUTES; 65c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes 66c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughesvoid _thread_created_hook(pid_t) { 670f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare} 68