1f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams/* 2f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * Copyright (C) 2013 The Android Open Source Project 3f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * 4f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * Licensed under the Apache License, Version 2.0 (the "License"); 5f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * you may not use this file except in compliance with the License. 6f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * You may obtain a copy of the License at 7f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * 8f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * http://www.apache.org/licenses/LICENSE-2.0 9f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * 10f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * Unless required by applicable law or agreed to in writing, software 11f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * distributed under the License is distributed on an "AS IS" BASIS, 12f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * See the License for the specific language governing permissions and 14f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams * limitations under the License. 15f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams */ 16f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams 17574854bcb2eb25a85b9b52faf2fb3e743fa7aa14Stephen Hines#include "rsUtils.h" 18f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams#include "rsCppUtils.h" 19f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams 202abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni#include <string> 212abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni 22a567cfab33f09f06efa0ad09e7cdbe3392385ceeElliott Hughes#include <string.h> 23a567cfab33f09f06efa0ad09e7cdbe3392385ceeElliott Hughes 242fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar#ifndef RS_COMPATIBILITY_LIB 252fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar#include <sys/wait.h> 262fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar#endif 272fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar 28f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Samsnamespace android { 29f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Samsnamespace renderscript { 30f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams 31f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Samsconst char * rsuCopyString(const char *name) { 32f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams return rsuCopyString(name, strlen(name)); 33f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams} 34f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams 35f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Samsconst char * rsuCopyString(const char *name, size_t len) { 36f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams char *n = new char[len+1]; 37f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams memcpy(n, name, len); 38f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams n[len] = 0; 39f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams return n; 40f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams} 41f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams 422abfcc6d129fe3defddef4540aa95cc445c03a7aYang Niconst char* rsuJoinStrings(int n, const char* const* strs) { 432abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni std::string tmp; 442abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni for (int i = 0; i < n; i++) { 452abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni if (i > 0) { 462abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni tmp.append(" "); 472abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni } 482abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni tmp.append(strs[i]); 492abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni } 502abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni return strndup(tmp.c_str(), tmp.size()); 512abfcc6d129fe3defddef4540aa95cc445c03a7aYang Ni} 52f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams 532fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar#ifndef RS_COMPATIBILITY_LIB 542fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainarbool rsuExecuteCommand(const char *exe, int nArgs, const char * const *args) { 552fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar std::unique_ptr<const char> joined(rsuJoinStrings(nArgs, args)); 567b29f5a5f75b1a8d830a14c6c5ae9bcb7d0b3ca4Pirama Arumuga Nainar ALOGV("Invoking %s with args '%s'", exe, joined.get()); 572fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar 582fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar pid_t pid = fork(); 592fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar 602fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar switch (pid) { 612fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar case -1: { // Error occurred (we attempt no recovery) 622fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar ALOGE("Fork of \"%s\" failed with error %s", exe, strerror(errno)); 632fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar return false; 642fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar } 652fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar case 0: { // Child process 667b29f5a5f75b1a8d830a14c6c5ae9bcb7d0b3ca4Pirama Arumuga Nainar // No (direct or indirect) call to malloc between fork and exec. It is 677b29f5a5f75b1a8d830a14c6c5ae9bcb7d0b3ca4Pirama Arumuga Nainar // possible that a different thread holds the heap lock before the fork. 6890ea8d33a7fd9a64dd68ef7ebccf595b8eb1dd68Pirama Arumuga Nainar 6990ea8d33a7fd9a64dd68ef7ebccf595b8eb1dd68Pirama Arumuga Nainar // ProcessManager in libcore can reap unclaimed SIGCHLDs in its process 7090ea8d33a7fd9a64dd68ef7ebccf595b8eb1dd68Pirama Arumuga Nainar // group. To ensure that the exit signal is not caught by 7190ea8d33a7fd9a64dd68ef7ebccf595b8eb1dd68Pirama Arumuga Nainar // ProcessManager and instead sent to libRS, set the child's PGID to its 7290ea8d33a7fd9a64dd68ef7ebccf595b8eb1dd68Pirama Arumuga Nainar // PID. 7390ea8d33a7fd9a64dd68ef7ebccf595b8eb1dd68Pirama Arumuga Nainar setpgid(0, 0); 7490ea8d33a7fd9a64dd68ef7ebccf595b8eb1dd68Pirama Arumuga Nainar 752fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar execv(exe, (char * const *)args); 762fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar 772fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar ALOGE("execv() failed: %s", strerror(errno)); 782fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar abort(); 792fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar return false; 802fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar } 812fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar default: { // Parent process (actual driver) 822fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar // Wait on child process to finish execution. 832fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar int status = 0; 842fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar pid_t w = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0)); 852fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar if (w == -1) { 862fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar ALOGE("Waitpid of \"%s\" failed with error %s", exe, 872fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar strerror(errno)); 882fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar return false; 892fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar } 902fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar 912fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { 922fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar return true; 932fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar } 942fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar 952fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar ALOGE("Child process \"%s\" terminated with status %d", exe, status); 962fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar return false; 972fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar } 982fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar } 992fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar} 1002fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar#endif // RS_COMPATIBILITY_LIB 1012fa8a238dd69afebdeb757adcb1d674043d78e32Pirama Arumuga Nainar 102f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams} 103f313dc32d5ea68a7c48fb4ec6e131ec2fb97ce2dJason Sams} 104