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138 lines
3.2 KiB
138 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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/*! @file
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* We test two aspects:
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- tls value before and after PIN_Detach()
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- creation new threads while PIN is detached from application
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*/
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#include <stdio.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/utsname.h>
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#define NTHREADS 4
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pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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unsigned int numOfThreadsReadyForDetach = 0;
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unsigned long pinDetached = 0;
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extern "C" void TellPinToDetach(unsigned long *updateWhenReady)
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{
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return;
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}
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// Get TLS value
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void* ReadTLSBase()
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{
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void* tlsBase;
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#if defined (TARGET_IA32)
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asm("mov %%gs:0, %%eax\n"
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"mov %%eax, %0"
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: "=r"(tlsBase)
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:
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: "eax");
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#else
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asm("mov %%gs:0, %%rax\n"
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"mov %%rax, %0"
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: "=r"(tlsBase)
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:
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: "rax");
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#endif
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return tlsBase;
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}
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/*
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* Compare TLS_BASE values before and after detach.
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*/
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void * thread_func (void *arg)
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{
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unsigned long thread_no = (unsigned long)arg+1;
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void* tlsBase = 0;
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tlsBase = ReadTLSBase();
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pthread_mutex_lock(&mutex);
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numOfThreadsReadyForDetach++;
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pthread_mutex_unlock(&mutex);
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while (!pinDetached)
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{
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usleep(100000); //0.1 seconds
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}
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void* tlsBaseAfterDetach = 0;
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tlsBaseAfterDetach = ReadTLSBase();
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if (tlsBase != tlsBaseAfterDetach)
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{
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fprintf(stderr, "ERROR in thread %lu: GTLSBASE before detach %p; after detach %p\n",
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thread_no, tlsBase, tlsBaseAfterDetach);
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return (void*)1;
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}
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else
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{
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fprintf(stderr, "tls base in thread %lu: %p\n", thread_no, tlsBase);
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}
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return 0;
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}
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int main (int argc, char *argv[])
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{
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pthread_t h[NTHREADS];
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void* tlsBase = 0;
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tlsBase = ReadTLSBase();
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fprintf(stderr, "tls base in main thread: %p\n", tlsBase);
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for (unsigned long i = 0; i < NTHREADS; i++)
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{
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pthread_create (&h[i], 0, thread_func, (void *)i);
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}
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/*
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* If the number of threads is big, some threads leave system call "clone"
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* while PIN is detached. This functionality is also tested here.
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*/
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TellPinToDetach(&pinDetached);
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void * result[NTHREADS];
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for (unsigned long i = 0; i < NTHREADS; i++)
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{
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pthread_join (h[i], &(result[i]));
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}
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for (unsigned long i = 0; i < NTHREADS; i++)
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{
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if (result[i] != 0)
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{
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fprintf(stderr, "TEST FAILED\n");
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return -1;
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}
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}
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void* tlsBaseAfterDetach = 0;
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tlsBaseAfterDetach = ReadTLSBase();
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if (tlsBase != tlsBaseAfterDetach)
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{
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fprintf(stderr, "ERROR in the main thread: TLS_BASE before detach %p; after detach %p\n",
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tlsBase, tlsBaseAfterDetach);
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return -1;
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}
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fprintf(stderr, "TEST PASSED\n");
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return 0;
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}
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