1ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 2ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--------------------------------------------------------------------*/ 3ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- Launching valgrind m_launcher.c ---*/ 4ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--------------------------------------------------------------------*/ 5ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 6ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* 7ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown This file is part of Valgrind, a dynamic binary instrumentation 8ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown framework. 9ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 10b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov Copyright (C) 2000-2011 Julian Seward 11ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown jseward@acm.org 12ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 13ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown This program is free software; you can redistribute it and/or 14ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown modify it under the terms of the GNU General Public License as 15ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown published by the Free Software Foundation; either version 2 of the 16ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown License, or (at your option) any later version. 17ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 18ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown This program is distributed in the hope that it will be useful, but 19ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown WITHOUT ANY WARRANTY; without even the implied warranty of 20ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown General Public License for more details. 22ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 23ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown You should have received a copy of the GNU General Public License 24ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown along with this program; if not, write to the Free Software 25ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 02111-1307, USA. 27ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 28ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown The GNU General Public License is contained in the file COPYING. 29ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown*/ 30ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 31ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Note: this is a "normal" program and not part of Valgrind proper, 32ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown and so it doesn't have to conform to Valgrind's arcane rules on 33ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown no-glibc-usage etc. */ 34ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 35ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Include valgrind headers before system headers to avoid problems 36ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown with the system headers #defining things which are used as names 37ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown of structure members in vki headers. */ 38ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 39ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include "pub_core_debuglog.h" 40ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include "pub_core_vki.h" // Avoids warnings from 41ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown // pub_core_libcfile.h 42ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include "pub_core_libcproc.h" // For VALGRIND_LIB, VALGRIND_LAUNCHER 43ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include "pub_core_ume.h" 44ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 45ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <assert.h> 46ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <ctype.h> 47ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <elf.h> 48ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <errno.h> 49ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <fcntl.h> 50ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <stdio.h> 51ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <stdlib.h> 52ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <string.h> 53ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <unistd.h> 54ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 55ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 56ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 57ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#define PATH_MAX 4096 /* POSIX refers to this a lot but I dunno 58ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown where it is defined */ 59ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 60ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#ifndef EM_X86_64 61ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#define EM_X86_64 62 // elf.h doesn't define this on some older systems 62ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#endif 631b891657a2208341cc71c68ae16eada0bee46d91Jeff Brown#ifndef EM_PPC64 641b891657a2208341cc71c68ae16eada0bee46d91Jeff Brown#define EM_PPC64 21 // elf.h doesn't define this on Android 651b891657a2208341cc71c68ae16eada0bee46d91Jeff Brown#endif 66ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 67b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 68ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Report fatal errors */ 69ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown__attribute__((noreturn)) 70ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownstatic void barf ( const char *format, ... ) 71ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 72ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown va_list vargs; 73ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 74ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown va_start(vargs, format); 75ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fprintf(stderr, "valgrind: Cannot continue: "); 76ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown vfprintf(stderr, format, vargs); 77ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fprintf(stderr, "\n"); 78ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown va_end(vargs); 79ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 80ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown exit(1); 81ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /*NOTREACHED*/ 82ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown assert(0); 83ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 84ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 85ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Search the path for the client program */ 86ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownstatic const char *find_client(const char *clientname) 87ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 88ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown static char fullname[PATH_MAX]; 89ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const char *path = getenv("PATH"); 90ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const char *colon; 91ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 92ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown while (path) 93ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown { 94ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if ((colon = strchr(path, ':')) == NULL) 95ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown { 96ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown strcpy(fullname, path); 97ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown path = NULL; 98ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 99ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown else 100ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown { 101ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown memcpy(fullname, path, colon - path); 102ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fullname[colon - path] = '\0'; 103ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown path = colon + 1; 104ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 105ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 106ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown strcat(fullname, "/"); 107ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown strcat(fullname, clientname); 108ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 109ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (access(fullname, R_OK|X_OK) == 0) 110ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return fullname; 111ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 112ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 113ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return clientname; 114ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 115ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 116ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Examine the client and work out which platform it is for */ 117ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownstatic const char *select_platform(const char *clientname) 118ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 119ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown int fd; 120ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown uint8_t header[4096]; 121ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ssize_t n_bytes; 122ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const char *platform = NULL; 123ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 124ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(2, "launcher", "selecting platform for '%s'\n", clientname); 125ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 126ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (strchr(clientname, '/') == NULL) 127ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown clientname = find_client(clientname); 128ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 129ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(2, "launcher", "selecting platform for '%s'\n", clientname); 130ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 131ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if ((fd = open(clientname, O_RDONLY)) < 0) 132ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return NULL; 133ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown // barf("open(%s): %s", clientname, strerror(errno)); 134ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 135ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(2, "launcher", "opened '%s'\n", clientname); 136ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 137ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown n_bytes = read(fd, header, sizeof(header)); 138ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown close(fd); 139ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (n_bytes < 2) { 140ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return NULL; 141ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 142ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 143ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(2, "launcher", "read %ld bytes from '%s'\n", 144ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (long int)n_bytes, clientname); 145ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 146ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (header[0] == '#' && header[1] == '!') { 147ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown int i = 2; 148ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown char *interp = (char *)header + 2; 149ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 150ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown // Skip whitespace. 151ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown while (1) { 152ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (i == n_bytes) return NULL; 153ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (' ' != header[i] && '\t' != header[i]) break; 154ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown i++; 155ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 156ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 157ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown // Get the interpreter name. 158ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown interp = &header[i]; 159ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown while (1) { 160ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (i == n_bytes) break; 161ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (isspace(header[i])) break; 162ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown i++; 163ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 164ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (i == n_bytes) return NULL; 165ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown header[i] = '\0'; 166ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 167ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown platform = select_platform(interp); 168ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 169ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } else if (n_bytes >= SELFMAG && memcmp(header, ELFMAG, SELFMAG) == 0) { 170ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 171ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (n_bytes >= sizeof(Elf32_Ehdr) && header[EI_CLASS] == ELFCLASS32) { 172ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const Elf32_Ehdr *ehdr = (Elf32_Ehdr *)header; 173ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 174ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (header[EI_DATA] == ELFDATA2LSB) { 175ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (ehdr->e_machine == EM_386 && 176ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (ehdr->e_ident[EI_OSABI] == ELFOSABI_SYSV || 177ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ehdr->e_ident[EI_OSABI] == ELFOSABI_LINUX)) { 178ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown platform = "x86-linux"; 179ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 180ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown else 181ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (ehdr->e_machine == EM_ARM && 182ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (ehdr->e_ident[EI_OSABI] == ELFOSABI_SYSV || 183ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ehdr->e_ident[EI_OSABI] == ELFOSABI_LINUX)) { 184ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown platform = "arm-linux"; 185ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 186ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 187ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown else if (header[EI_DATA] == ELFDATA2MSB) { 188ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (ehdr->e_machine == EM_PPC && 189ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (ehdr->e_ident[EI_OSABI] == ELFOSABI_SYSV || 190ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ehdr->e_ident[EI_OSABI] == ELFOSABI_LINUX)) { 191ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown platform = "ppc32-linux"; 192ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 193ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 194ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 195ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } else if (n_bytes >= sizeof(Elf64_Ehdr) && header[EI_CLASS] == ELFCLASS64) { 196ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const Elf64_Ehdr *ehdr = (Elf64_Ehdr *)header; 197ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 198ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (header[EI_DATA] == ELFDATA2LSB) { 199ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (ehdr->e_machine == EM_X86_64 && 200ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (ehdr->e_ident[EI_OSABI] == ELFOSABI_SYSV || 201ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ehdr->e_ident[EI_OSABI] == ELFOSABI_LINUX)) { 202ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown platform = "amd64-linux"; 203ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 204ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } else if (header[EI_DATA] == ELFDATA2MSB) { 205b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov# if !defined(VGPV_arm_linux_android) && !defined(VGPV_x86_linux_android) 206ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (ehdr->e_machine == EM_PPC64 && 207ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (ehdr->e_ident[EI_OSABI] == ELFOSABI_SYSV || 208ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ehdr->e_ident[EI_OSABI] == ELFOSABI_LINUX)) { 209ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown platform = "ppc64-linux"; 210b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 211b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov else 212b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (ehdr->e_machine == EM_S390 && 213b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov (ehdr->e_ident[EI_OSABI] == ELFOSABI_SYSV || 214b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov ehdr->e_ident[EI_OSABI] == ELFOSABI_LINUX)) { 215b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov platform = "s390x-linux"; 216ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 217b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov# endif 218ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 219ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 220ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 221ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 222ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(2, "launcher", "selected platform '%s'\n", 223ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown platform ? platform : "unknown"); 224ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 225ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return platform; 226ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 227ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 228ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Where we expect to find all our aux files */ 229ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownstatic const char *valgrind_lib = VG_LIBDIR; 230ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 231ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownint main(int argc, char** argv, char** envp) 232ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 233ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown int i, j, loglevel, r; 234ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const char *toolname = NULL; 235ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const char *clientname = NULL; 236ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const char *platform; 237ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const char *default_platform; 238ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const char *cp; 239ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown char *toolfile; 240ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown char launcher_name[PATH_MAX+1]; 241ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown char* new_line; 242ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown char** new_env; 243ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 244ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Start the debugging-log system ASAP. First find out how many 245ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown "-d"s were specified. This is a pre-scan of the command line. 246ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown At the same time, look for the tool name. */ 247ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown loglevel = 0; 248ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown for (i = 1; i < argc; i++) { 249ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (argv[i][0] != '-') { 250ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown clientname = argv[i]; 251ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown break; 252ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 253ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (0 == strcmp(argv[i], "--")) { 254ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (i+1 < argc) 255ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown clientname = argv[i+1]; 256ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown break; 257ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 258ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (0 == strcmp(argv[i], "-d")) 259ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown loglevel++; 260ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (0 == strncmp(argv[i], "--tool=", 7)) 261ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown toolname = argv[i] + 7; 262ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 263ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 264ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* ... and start the debug logger. Now we can safely emit logging 265ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown messages all through startup. */ 266ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog_startup)(loglevel, "Stage 1"); 267ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 268ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Make sure we know which tool we're using */ 269ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (toolname) { 270ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(1, "launcher", "tool '%s' requested\n", toolname); 271ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } else { 272ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(1, "launcher", 273ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown "no tool requested, defaulting to 'memcheck'\n"); 274ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown toolname = "memcheck"; 275ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 276ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 277ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Select a platform to use if we can't decide that by looking at 278ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown the executable (eg because it's a shell script). Note that the 279ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown default_platform is not necessarily either the primary or 280ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown secondary build target. Instead it's chosen to maximise the 281ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown chances that /bin/sh will work on it. Hence for a primary 282ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown target of ppc64-linux we still choose ppc32-linux as the default 283ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown target, because on most ppc64-linux setups, the basic /bin, 284ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /usr/bin, etc, stuff is built in 32-bit mode, not 64-bit 285ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown mode. */ 286ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if ((0==strcmp(VG_PLATFORM,"x86-linux")) || 287ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (0==strcmp(VG_PLATFORM,"amd64-linux")) || 288ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (0==strcmp(VG_PLATFORM,"ppc32-linux")) || 289ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (0==strcmp(VG_PLATFORM,"ppc64-linux")) || 290b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov (0==strcmp(VG_PLATFORM,"arm-linux")) || 291b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov (0==strcmp(VG_PLATFORM,"s390x-linux"))) 292ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown default_platform = VG_PLATFORM; 293ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown else 294ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown barf("Unknown VG_PLATFORM '%s'", VG_PLATFORM); 295ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 296ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Work out what platform to use, or use the default platform if 297ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown not possible. */ 298ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (clientname == NULL) { 299ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(1, "launcher", 300ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown "no client specified, defaulting platform to '%s'\n", 301ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown default_platform); 302ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown platform = default_platform; 303ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } else if ((platform = select_platform(clientname)) != NULL) { 304ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(1, "launcher", "selected platform '%s'\n", platform); 305ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } else { 306ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(1, "launcher", 307ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown "no platform detected, defaulting platform to '%s'\n", 308ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown default_platform); 309ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown platform = default_platform; 310ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 311ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 312ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Figure out the name of this executable (viz, the launcher), so 313ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown we can tell stage2. stage2 will use the name for recursive 314ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown invocations of valgrind on child processes. */ 315ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown memset(launcher_name, 0, PATH_MAX+1); 316ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown r = readlink("/proc/self/exe", launcher_name, PATH_MAX); 317ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (r == -1) { 318ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* If /proc/self/exe can't be followed, don't give up. Instead 319ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown continue with an empty string for VALGRIND_LAUNCHER. In the 320ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown sys_execve wrapper, this is tested, and if found to be empty, 321ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fail the execve. */ 322ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fprintf(stderr, "valgrind: warning (non-fatal): " 323ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown "readlink(\"/proc/self/exe\") failed.\n"); 324ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fprintf(stderr, "valgrind: continuing, however --trace-children=yes " 325ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown "will not work.\n"); 326ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 327ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 328ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* tediously augment the env: VALGRIND_LAUNCHER=launcher_name */ 329ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown new_line = malloc(strlen(VALGRIND_LAUNCHER) + 1 330ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown + strlen(launcher_name) + 1); 331ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (new_line == NULL) 332ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown barf("malloc of new_line failed."); 333ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown strcpy(new_line, VALGRIND_LAUNCHER); 334ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown strcat(new_line, "="); 335ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown strcat(new_line, launcher_name); 336ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 337ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown for (j = 0; envp[j]; j++) 338ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ; 339ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown new_env = malloc((j+2) * sizeof(char*)); 340ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (new_env == NULL) 341ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown barf("malloc of new_env failed."); 342ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown for (i = 0; i < j; i++) 343ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown new_env[i] = envp[i]; 344ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown new_env[i++] = new_line; 345ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown new_env[i++] = NULL; 346ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown assert(i == j+2); 347ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 348ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Establish the correct VALGRIND_LIB. */ 349ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown cp = getenv(VALGRIND_LIB); 350ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 351ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (cp != NULL) 352ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown valgrind_lib = cp; 353ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 354ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Build the stage2 invocation, and execve it. Bye! */ 355ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown toolfile = malloc(strlen(valgrind_lib) + strlen(toolname) + strlen(platform) + 3); 356ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (toolfile == NULL) 357ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown barf("malloc of toolfile failed."); 358ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown sprintf(toolfile, "%s/%s-%s", valgrind_lib, toolname, platform); 359ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 360ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(1, "launcher", "launching %s\n", toolfile); 361ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 362ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown execve(toolfile, argv, new_env); 363ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 364ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fprintf(stderr, "valgrind: failed to start tool '%s' for platform '%s': %s\n", 365ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown toolname, platform, strerror(errno)); 366ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 367ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown exit(1); 368ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 369