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memcheck/tests/linux/stack_switch.c
63 строки
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Mark Wielaard
Squash glibc warning about _BSD_SOURCE being deprecated tests.
22 янв 2016, 16:49
22 янв 2016, 16:49
dcb119c
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#define _XOPEN_SOURCE 600 /* Legacy feature macro. */ #define _BSD_SOURCE /* New feature macro, always define to squash warning about _BSD_SOURCE with glibc 2.20+. */ #define _DEFAULT_SOURCE 1 #define _GNU_SOURCE #include <stdio.h> #include <sched.h> #include <stdlib.h> #include <string.h> #include "tests/sys_mman.h" #include <sys/syscall.h> #include <sys/wait.h> #include <unistd.h> #include "valgrind.h" #define STACK_SIZE 8192 #ifndef CLONE_THREAD #define CLONE_THREAD 0x00010000 /* Same thread group? */ #endif static int thread_main(void *arg) { char buffer[1024]; memset( buffer, 1, sizeof( buffer ) ); sleep(2); /* ppc64-linux hack */ return memchr( buffer, 1, sizeof( buffer ) ) == NULL; } int main(int argc, char **argv) { void *stack; int stackid __attribute__((unused)); pid_t pid; /* "2*" is a ppc64-linux hack */ if ( ( stack = mmap( NULL, 2* STACK_SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 ) ) == MAP_FAILED ) { perror( "mmap" ); exit( 1 ); } stackid = VALGRIND_STACK_REGISTER( stack, stack + STACK_SIZE ); if ( ( pid = clone( thread_main, stack + STACK_SIZE, CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|SIGCHLD, NULL ) ) == -1 ) { perror( "clone" ); exit( 1 ); } sleep( 1 ); exit( 0 ); }