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98 lines
2.8 KiB
98 lines
2.8 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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// Application that when running under Pin, may reproduce a bug in macOS* kernel that
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// causes wait*() calls to inproperly fail with ECHILD.
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <unistd.h>
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#include <iostream>
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#include <string>
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using std::string;
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using std::cout;
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using std::endl;
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using std::cerr;
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//Wait for a process completion
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//Verify it returned the expected exit code
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int main(int argc, char * argv[])
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{
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char *childArgvArray[5];
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childArgvArray[0] = argv[1];
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childArgvArray[1] = argv[2];
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childArgvArray[2] = argv[3];
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childArgvArray[3] = argv[4];
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childArgvArray[4] = argv[5];
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pid_t pid = fork();
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if (pid == 0)
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{
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// child process
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execv(childArgvArray[0], childArgvArray);
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cout << "Execve failed "<< argv[1] << " " << argv[2] << " " << argv[3] << endl;
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return 1;
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}
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else
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{
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int status;
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pid_t ret;
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while (0 == (ret = waitpid(pid, &status, WNOHANG)) || (ret < 0 && errno == EINTR));
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if (ret < 0)
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{
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cout << "waitpid() failed with errno " << errno << endl;
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return 2;
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}
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else if (status !=0)
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{
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cout << "Parent report: Child process failed. Status of the child process is "<< WEXITSTATUS(status) << endl;
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return 3;
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}
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else
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cout << "Parent report: Child process exited successfully" << endl;
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}
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pid = fork();
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if (pid == 0)
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{
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// child process
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execv(childArgvArray[0], childArgvArray);
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cout << "Execve failed "<< argv[1] << " " << argv[2] << " " << argv[3] << endl;
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return 4;
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}
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else
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{
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siginfo_t siginfo;
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pid_t ret;
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do
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{
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siginfo.si_pid = 0;
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}
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while ((0 == (ret = waitid(P_PID, pid, &siginfo, WEXITED | WNOHANG)) && siginfo.si_pid == 0) || (ret < 0 && errno == EINTR));
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if (ret < 0)
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{
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cout << "waitid() failed with errno " << errno << endl;
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return 5;
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}
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else if (siginfo.si_status !=0)
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{
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cout << "Parent report: Child process failed. Status of the child process is "<< WEXITSTATUS(siginfo.si_status) << endl;
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return 6;
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}
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else
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cout << "Parent report: Child process exited successfully" << endl;
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}
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return 0;
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}
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