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119 lines
3.2 KiB
119 lines
3.2 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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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <assert.h>
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#include <iostream>
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#include "atfork_callbacks.h"
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using std::cerr;
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using std::endl;
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using std::cout;
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/***********************************************
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*
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* This app prints a number for each of the pthreads callbacks.
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* The pintool (atfork_callbacks.cpp) also prints numbers for the callbacks from PIN.
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*
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* The before-fork callbacks are atfork_prepare() and pintool_on_fork_before()
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* atfork_prepare() should precede pintool_on_fork_before()
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*
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* The after-fork callbacks for PARENT are atfork_parent() and pintool_on_fork_after_in_parent()
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* pintool_on_fork_after_in_parent() should precede after-fork()
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*
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* The after-fork callbacks for CHILD are atfork_child() and pintool_on_fork_after_in_child()
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* pintool_on_fork_after_in_child() should precede atfork_child()
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*
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************************************************/
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void atfork_prepare()
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{
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fork_callbacks* callbacks = get_shared_object();
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assert(callbacks);
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if (callbacks->pin_before_fork != 0)
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{
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cerr << "pintool_on_fork_before() was called before atfork_prepare()" << endl;
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exit(1);
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}
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callbacks->atfork_before = 1;
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}
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void atfork_parent()
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{
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fork_callbacks* callbacks = get_shared_object();
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assert(callbacks);
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if (callbacks->pin_after_fork_parent != 1)
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{
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cerr << "atfork_parent() was called before pintool_on_fork_after_in_parent()" << endl;
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exit(1);
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}
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callbacks->atfork_after_parent = 1;
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}
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void atfork_child()
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{
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fork_callbacks* callbacks = get_shared_object();
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assert(callbacks);
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if (callbacks->pin_after_fork_child != 1)
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{
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cerr << "atfork_child() was called before pintool_on_fork_after_in_child()" << endl;
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exit(1);
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}
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callbacks->atfork_after_child = 1;
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}
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int main()
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{
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fork_callbacks* callbacks = create_shared_object();
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assert(callbacks);
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callbacks->atfork_before = 0;
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callbacks->atfork_after_child = 0;
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callbacks->atfork_after_parent = 0;
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callbacks->pin_before_fork = 0;
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callbacks->pin_after_fork_child = 0;
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callbacks->pin_after_fork_parent = 0;
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pthread_atfork(atfork_prepare, atfork_parent, atfork_child);
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pid_t child = fork();
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if (child != 0)
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{
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assert(child > 0);
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int status = 0;
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pid_t client = wait(&status);
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assert(client == child);
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callbacks = get_shared_object();
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assert(callbacks);
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fork_callbacks callbacks_copy = *callbacks;
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remove_shared_object();
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assert(callbacks_copy.atfork_before);
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assert(callbacks_copy.atfork_after_child);
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assert(callbacks_copy.atfork_after_parent);
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assert(callbacks_copy.pin_before_fork);
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assert(callbacks_copy.pin_after_fork_child);
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assert(callbacks_copy.pin_after_fork_parent);
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}
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return 0;
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}
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