--- /dev/null
+/*
+ * memory_tests.c.c
+ * xnu_quick_test
+ *
+ * Created by Jerry Cottingham on 4/12/05.
+ * Copyright 2005 Apple Computer Inc. All rights reserved.
+ *
+ */
+
+#include "tests.h"
+
+extern char g_target_path[ PATH_MAX ];
+
+/* **************************************************************************************************************
+ * Test madvise, mincore, minherit, mlock, mlock, mmap, mprotect, msync, munmap system calls.
+ * todo - see if Francois has better versions of these tests...
+ * **************************************************************************************************************
+ */
+int memory_tests( void * the_argp )
+{
+ int my_err;
+ int my_page_size, my_status;
+ int my_fd = -1;
+ char * my_pathp = NULL;
+ char * my_bufp = NULL;
+ char * my_addr = NULL;
+ char * my_test_page_p = NULL;
+ ssize_t my_result;
+ pid_t my_pid, my_wait_pid;
+
+ my_pathp = (char *) malloc( PATH_MAX );
+ if ( my_pathp == NULL ) {
+ printf( "malloc failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ goto test_failed_exit;
+ }
+ *my_pathp = 0x00;
+ strcat( my_pathp, &g_target_path[0] );
+ strcat( my_pathp, "/" );
+
+ /* create a test file */
+ my_err = create_random_name( my_pathp, 1 );
+ if ( my_err != 0 ) {
+ goto test_failed_exit;
+ }
+
+ my_page_size = getpagesize( );
+ my_test_page_p = (char *) malloc( my_page_size );
+ if ( my_test_page_p == NULL ) {
+ printf( "malloc failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ goto test_failed_exit;
+ }
+ *my_test_page_p = 0x00;
+ strcat( my_test_page_p, "parent data" );
+
+ /* test minherit - share a page with child, add to the string in child then
+ * check for modification after child terminates.
+ */
+ my_err = minherit( my_test_page_p, my_page_size, VM_INHERIT_SHARE );
+ if ( my_err == -1 ) {
+ printf( "minherit failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ goto test_failed_exit;
+ }
+
+ /*
+ * spin off a child process that we will use for testing.
+ */
+ my_pid = fork( );
+ if ( my_pid == -1 ) {
+ printf( "fork failed with errno %d - %s \n", errno, strerror( errno ) );
+ goto test_failed_exit;
+ }
+ if ( my_pid == 0 ) {
+ /*
+ * child process...
+ */
+ strcat( my_test_page_p, " child data" );
+
+ /* create a test file in page size chunks */
+ my_bufp = (char *) malloc( (my_page_size * 10) );
+ if ( my_bufp == NULL ) {
+ printf( "malloc failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ memset( my_bufp, 'j', (my_page_size * 10) );
+ my_fd = open( my_pathp, O_RDWR, 0 );
+ if ( my_fd == -1 ) {
+ printf( "open call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ my_result = write( my_fd, my_bufp, (my_page_size * 10) );
+ if ( my_result == -1 ) {
+ printf( "write call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ /* map the file into memory */
+ my_addr = (char *) mmap( NULL, (my_page_size * 2), (PROT_READ | PROT_WRITE), (MAP_FILE | MAP_SHARED), my_fd, 0 );
+ if ( my_addr == (char *) -1 ) {
+ printf( "mmap call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ /* make sure we got the right data mapped */
+ if ( *my_addr != 'j' || *(my_addr + my_page_size) != 'j' ) {
+ printf( "did not map in correct data \n" );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ /* test madvise */
+ my_err = madvise( my_addr, (my_page_size * 2), MADV_WILLNEED );
+ if ( my_err == -1 ) {
+ printf( "madvise call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ /* test mincore, mlock, mlock */
+ my_err = mlock( my_addr, my_page_size );
+ if ( my_err == -1 ) {
+ printf( "mlock call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ my_err = mincore( my_addr, 1, my_bufp );
+ if ( my_err == -1 ) {
+ printf( "mincore call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+ /* page my_addr is in should be resident after mlock */
+ if ( (*my_bufp & MINCORE_INCORE) == 0 ) {
+ printf( "mincore call failed to find resident page \n" );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ my_err = munlock( my_addr, my_page_size );
+ if ( my_err == -1 ) {
+ printf( "munlock call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ /* modify first page then use msync to push data out */
+ memset( my_addr, 'x', my_page_size );
+ my_err = msync( my_addr, my_page_size, (MS_SYNC | MS_INVALIDATE) );
+ if ( my_err == -1 ) {
+ printf( "msync call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ /* verify that the file was updated */
+ lseek( my_fd, 0, SEEK_SET );
+ bzero( (void *)my_bufp, my_page_size );
+ my_result = read( my_fd, my_bufp, my_page_size );
+ if ( my_result == -1 ) {
+ printf( "read call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+ if ( *my_bufp != 'x' ) {
+ printf( "msync did not flush correct data \n" );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ /* unmap our test page */
+ my_err = munmap( my_addr, (my_page_size * 2) );
+ if ( my_err == -1 ) {
+ printf( "munmap call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+ my_addr = NULL;
+
+ /* map the file into memory again for mprotect test */
+ my_addr = (char *) mmap( NULL, (my_page_size * 2), (PROT_READ | PROT_WRITE), (MAP_FILE | MAP_SHARED), my_fd, 0 );
+ if ( my_addr == (char *) -1 ) {
+ printf( "mmap call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+ *my_addr = 'a';
+
+
+
+ /* test mprotect - change protection to only PROT_READ */
+ my_err = mprotect( my_addr, my_page_size, PROT_READ );
+ if ( my_err == -1 ) {
+ printf( "mprotect call failed with error %d - \"%s\" \n", errno, strerror( errno) );
+ my_err = -1;
+ goto exit_child;
+ }
+
+ *my_addr = 'z'; /* should cause SIGBUS signal (we look for this at child termination within the parent) */
+
+
+
+ my_err = 0;
+exit_child:
+ exit( my_err );
+ }
+
+
+ /* parent process -
+ * we should get SIGBUS exit when child tries to write to read only memory
+ */
+ my_wait_pid = wait4( my_pid, &my_status, 0, NULL );
+ if ( my_wait_pid == -1 ) {
+ printf( "wait4 failed with errno %d - %s \n", errno, strerror( errno ) );
+ goto test_failed_exit;
+ }
+
+ /* wait4 should return our child's pid when it exits */
+ if ( my_wait_pid != my_pid ) {
+ printf( "wait4 did not return child pid - returned %d should be %d \n", my_wait_pid, my_pid );
+ goto test_failed_exit;
+ }
+
+ if ( WIFSIGNALED( my_status ) && WTERMSIG( my_status ) != SIGBUS ) {
+ printf( "wait4 returned wrong signal status - 0x%02X \n", my_status );
+ goto test_failed_exit;
+ }
+
+ /* make sure shared page got modified in child */
+ if ( strcmp( my_test_page_p, "parent data child data" ) != 0 ) {
+ printf( "minherit did not work correctly - shared page looks wrong \n" );
+ goto test_failed_exit;
+ }
+ my_err = 0;
+ goto test_passed_exit;
+
+test_failed_exit:
+ my_err = -1;
+
+test_passed_exit:
+ if ( my_pathp != NULL ) {
+ remove( my_pathp );
+ free( my_pathp );
+ }
+ if ( my_test_page_p != NULL ) {
+ free( my_test_page_p );
+ }
+ return( my_err );
+}
+
projects / apple / xnu.git / blobdiff