static int zend_shared_alloc_reattach(size_t requested_size, char **error_in)
{
int err;
void *wanted_mapping_base;
char *mmap_base_file = get_mmap_base_file();
FILE *fp = fopen(mmap_base_file, "r");
MEMORY_BASIC_INFORMATION info;
err = GetLastError();
if (!fp) {
zend_win_error_message(ACCEL_LOG_WARNING, mmap_base_file, err);
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to open base address file", err);
*error_in="fopen";
return ALLOC_FAILURE;
}
if (!fscanf(fp, "%p", &wanted_mapping_base)) {
err = GetLastError();
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to read base address", err);
*error_in="read mapping base";
fclose(fp);
return ALLOC_FAILURE;
}
fclose(fp);
/* Check if the requested address space is free */
if (VirtualQuery(wanted_mapping_base, &info, sizeof(info)) == 0 ||
info.State != MEM_FREE ||
info.RegionSize < requested_size) {
err = ERROR_INVALID_ADDRESS;
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to reattach to base address", err);
return ALLOC_FAILURE;
}
mapping_base = MapViewOfFileEx(memfile, FILE_MAP_ALL_ACCESS, 0, 0, 0, wanted_mapping_base);
err = GetLastError();
if (mapping_base == NULL) {
if (err == ERROR_INVALID_ADDRESS) {
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to reattach to base address", err);
return ALLOC_FAILURE;
}
return ALLOC_FAIL_MAPPING;
}
smm_shared_globals = (zend_smm_shared_globals *) mapping_base;
return SUCCESSFULLY_REATTACHED;
}
static int create_segments(size_t requested_size, zend_shared_segment ***shared_segments_p, int *shared_segments_count, char **error_in)
{
int err, ret;
zend_shared_segment *shared_segment;
int map_retries = 0;
void *default_mapping_base_set[] = { 0, 0 };
/* TODO:
improve fixed addresses on x64. It still makes no sense to do it as Windows addresses are virtual per se and can or should be randomized anyway
through Address Space Layout Radomization (ASLR). We can still let the OS do its job and be sure that each process gets the same address if
desired. Not done yet, @zend refused but did not remember the exact reason, pls add info here if one of you know why :)
*/
#if defined(_WIN64)
void *vista_mapping_base_set[] = { (void *) 0x0000100000000000, (void *) 0x0000200000000000, (void *) 0x0000300000000000, (void *) 0x0000700000000000, 0 };
#else
void *vista_mapping_base_set[] = { (void *) 0x20000000, (void *) 0x21000000, (void *) 0x30000000, (void *) 0x31000000, (void *) 0x50000000, 0 };
#endif
void **wanted_mapping_base = default_mapping_base_set;
zend_shared_alloc_lock_win32();
/* Mapping retries: When Apache2 restarts, the parent process startup routine
can be called before the child process is killed. In this case, the map will fail
and we have to sleep some time (until the child releases the mapping object) and retry.*/
do {
memfile = OpenFileMapping(FILE_MAP_WRITE, 0, create_name_with_username(ACCEL_FILEMAP_NAME));
err = GetLastError();
if (memfile == NULL) {
break;
}
ret = zend_shared_alloc_reattach(requested_size, error_in);
err = GetLastError();
if (ret == ALLOC_FAIL_MAPPING) {
/* Mapping failed, wait for mapping object to get freed and retry */
CloseHandle(memfile);
memfile = NULL;
if (++map_retries >= MAX_MAP_RETRIES) {
break;
}
zend_shared_alloc_unlock_win32();
Sleep(1000 * (map_retries + 1));
zend_shared_alloc_lock_win32();
} else {
zend_shared_alloc_unlock_win32();
return ret;
}
} while (1);
if (map_retries == MAX_MAP_RETRIES) {
zend_shared_alloc_unlock_win32();
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to open file mapping", err);
*error_in = "OpenFileMapping";
return ALLOC_FAILURE;
}
/* creating segment here */
*shared_segments_count = 1;
*shared_segments_p = (zend_shared_segment **) calloc(1, sizeof(zend_shared_segment)+sizeof(void *));
if (!*shared_segments_p) {
zend_shared_alloc_unlock_win32();
zend_win_error_message(ACCEL_LOG_FATAL, "calloc() failed", GetLastError());
*error_in = "calloc";
return ALLOC_FAILURE;
}
shared_segment = (zend_shared_segment *)((char *)(*shared_segments_p) + sizeof(void *));
(*shared_segments_p)[0] = shared_segment;
memfile = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, requested_size,
create_name_with_username(ACCEL_FILEMAP_NAME));
err = GetLastError();
if (memfile == NULL) {
zend_shared_alloc_unlock_win32();
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to create file mapping", err);
*error_in = "CreateFileMapping";
return ALLOC_FAILURE;
}
/* Starting from windows Vista, heap randomization occurs which might cause our mapping base to
be taken (fail to map). So under Vista, we try to map into a hard coded predefined addresses
in high memory. */
if (!ZCG(accel_directives).mmap_base || !*ZCG(accel_directives).mmap_base) {
wanted_mapping_base = vista_mapping_base_set;
} else {
char *s = ZCG(accel_directives).mmap_base;
/* skip leading 0x, %p assumes hexdeciaml format anyway */
if (*s == '0' && *(s + 1) == 'x') {
s += 2;
}
if (sscanf(s, "%p", &default_mapping_base_set[0]) != 1) {
zend_shared_alloc_unlock_win32();
zend_win_error_message(ACCEL_LOG_FATAL, "Bad mapping address specified in opcache.mmap_base", err);
return ALLOC_FAILURE;
}
}
do {
shared_segment->p = mapping_base = MapViewOfFileEx(memfile, FILE_MAP_ALL_ACCESS, 0, 0, 0, *wanted_mapping_base);
if (*wanted_mapping_base == NULL) { /* Auto address (NULL) is the last option on the array */
break;
}
wanted_mapping_base++;
} while (!mapping_base);
err = GetLastError();
if (mapping_base == NULL) {
zend_shared_alloc_unlock_win32();
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to create view for file mapping", err);
*error_in = "MapViewOfFile";
return ALLOC_FAILURE;
} else {
char *mmap_base_file = get_mmap_base_file();
FILE *fp = fopen(mmap_base_file, "w");
err = GetLastError();
if (!fp) {
zend_shared_alloc_unlock_win32();
zend_win_error_message(ACCEL_LOG_WARNING, mmap_base_file, err);
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to write base address", err);
return ALLOC_FAILURE;
}
fprintf(fp, "%p\n", mapping_base);
fclose(fp);
}
shared_segment->pos = 0;
shared_segment->size = requested_size;
zend_shared_alloc_unlock_win32();
return ALLOC_SUCCESS;
}
static int zend_shared_alloc_reattach(size_t requested_size, char **error_in)
{
int err;
void *wanted_mapping_base;
char *mmap_base_file = get_mmap_base_file();
FILE *fp = fopen(mmap_base_file, "r");
MEMORY_BASIC_INFORMATION info;
err = GetLastError();
if (!fp) {
zend_win_error_message(ACCEL_LOG_WARNING, mmap_base_file, err);
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to open base address file", err);
*error_in="fopen";
return ALLOC_FAILURE;
}
if (!fscanf(fp, "%p", &wanted_mapping_base)) {
err = GetLastError();
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to read base address", err);
*error_in="read mapping base";
fclose(fp);
return ALLOC_FAILURE;
}
fclose(fp);
/* Check if the requested address space is free */
if (VirtualQuery(wanted_mapping_base, &info, sizeof(info)) == 0 ||
info.State != MEM_FREE ||
info.RegionSize < requested_size) {
#if ENABLE_FILE_CACHE_FALLBACK
if (ZCG(accel_directives).file_cache && ZCG(accel_directives).file_cache_fallback) {
size_t pre_size, wanted_mb_save;
wanted_mb_save = (size_t)wanted_mapping_base;
err = ERROR_INVALID_ADDRESS;
zend_win_error_message(ACCEL_LOG_WARNING, "Base address marks unusable memory region (fall-back to file cache)", err);
pre_size = ZEND_ALIGNED_SIZE(sizeof(zend_smm_shared_globals)) + ZEND_ALIGNED_SIZE(sizeof(zend_shared_segment)) + ZEND_ALIGNED_SIZE(sizeof(void *)) + ZEND_ALIGNED_SIZE(sizeof(int));
/* Map only part of SHM to have access opcache shared globals */
mapping_base = MapViewOfFileEx(memfile, FILE_MAP_ALL_ACCESS, 0, 0, pre_size + ZEND_ALIGNED_SIZE(sizeof(zend_accel_shared_globals)), NULL);
if (mapping_base == NULL) {
err = GetLastError();
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to reattach to opcache shared globals", err);
return ALLOC_FAILURE;
}
accel_shared_globals = (zend_accel_shared_globals *)((char *)((zend_smm_shared_globals *)mapping_base)->app_shared_globals + ((char *)mapping_base - (char *)wanted_mb_save));
/* Make this process to use file-cache only */
ZCG(accel_directives).file_cache_only = 1;
return ALLOC_FALLBACK;
}
#endif
err = ERROR_INVALID_ADDRESS;
zend_win_error_message(ACCEL_LOG_FATAL, "Base address marks unusable memory region. Please setup opcache.file_cache and opcache.file_cache_callback directives for more convenient Opcache usage", err);
return ALLOC_FAILURE;
}
mapping_base = MapViewOfFileEx(memfile, FILE_MAP_ALL_ACCESS, 0, 0, 0, wanted_mapping_base);
err = GetLastError();
if (mapping_base == NULL) {
if (err == ERROR_INVALID_ADDRESS) {
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to reattach to base address", err);
return ALLOC_FAILURE;
}
return ALLOC_FAIL_MAPPING;
}
smm_shared_globals = (zend_smm_shared_globals *) mapping_base;
return SUCCESSFULLY_REATTACHED;
}
static int create_segments(size_t requested_size, zend_shared_segment ***shared_segments_p, int *shared_segments_count, char **error_in)
{
int err, ret;
zend_shared_segment *shared_segment;
int map_retries = 0;
void *default_mapping_base_set[] = { 0, 0 };
void *vista_mapping_base_set[] = { (void *)0x20000000, (void *)0x21000000, (void *)0x30000000, (void *)0x31000000, (void *)0x50000000, 0 };
void **wanted_mapping_base = default_mapping_base_set;
TSRMLS_FETCH();
/* Mapping retries: When Apache2 restarts, the parent process startup routine
can be called before the child process is killed. In this case, the map will fail
and we have to sleep some time (until the child releases the mapping object) and retry.*/
do {
memfile = OpenFileMapping(FILE_MAP_WRITE, 0, create_name_with_username(ACCEL_FILEMAP_NAME));
err = GetLastError();
if (memfile == NULL)
break;
ret = zend_shared_alloc_reattach(requested_size, error_in);
err = GetLastError();
if (ret == ALLOC_FAIL_MAPPING) {
/* Mapping failed, wait for mapping object to get freed and retry */
CloseHandle(memfile);
memfile = NULL;
Sleep(1000*(map_retries+1));
} else {
return ret;
}
} while(++map_retries < MAX_MAP_RETRIES);
if(map_retries == MAX_MAP_RETRIES) {
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to open file mapping", err);
*error_in = "OpenFileMapping";
return ALLOC_FAILURE;
}
/* creating segment here */
*shared_segments_count = 1;
*shared_segments_p = (zend_shared_segment **) calloc(1, sizeof(zend_shared_segment)+sizeof(void *));
shared_segment = (zend_shared_segment *)((char *)(*shared_segments_p) + sizeof(void *));
(*shared_segments_p)[0] = shared_segment;
memfile = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, requested_size,
create_name_with_username(ACCEL_FILEMAP_NAME));
err = GetLastError();
if(memfile == NULL) {
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to create file mapping", err);
*error_in = "CreateFileMapping";
return ALLOC_FAILURE;
}
/* Starting from windows Vista, heap randomization occurs which might cause our mapping base to
be taken (fail to map). So under Vista, we try to map into a hard coded predefined addresses
in high memory. */
if (!ZCG(accel_directives).mmap_base || !*ZCG(accel_directives).mmap_base) {
do {
OSVERSIONINFOEX osvi;
SYSTEM_INFO si;
ZeroMemory(&si, sizeof(SYSTEM_INFO));
ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
if (! GetVersionEx ((OSVERSIONINFO *) &osvi)) {
osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
if (! GetVersionEx ( (OSVERSIONINFO *) &osvi) )
break;
}
GetSystemInfo(&si);
/* Are we running Vista ? */
if(osvi.dwPlatformId == VER_PLATFORM_WIN32_NT && osvi.dwMajorVersion == 6 ) {
/* Assert that platform is 32 bit (for 64 bit we need to test a different set */
if(si.wProcessorArchitecture != PROCESSOR_ARCHITECTURE_INTEL)
DebugBreak();
wanted_mapping_base = vista_mapping_base_set;
}
} while (0);
} else {
char *s = ZCG(accel_directives).mmap_base;
/* skip leading 0x, %p assumes hexdeciaml format anyway */
if (*s == '0' && *(s+1) == 'x') {
s += 2;
}
if (sscanf(s, "%p", &default_mapping_base_set[0]) != 1) {
zend_win_error_message(ACCEL_LOG_FATAL, "Bad mapping address specified in zend_optimizerplus.mmap_base", err);
return ALLOC_FAILURE;
}
}
do {
shared_segment->p = mapping_base = MapViewOfFileEx(memfile, FILE_MAP_ALL_ACCESS, 0, 0, 0, *wanted_mapping_base);
if(*wanted_mapping_base == NULL) /* Auto address (NULL) is the last option on the array */
break;
wanted_mapping_base++;
} while (!mapping_base);
err = GetLastError();
if(mapping_base == NULL) {
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to create view for file mapping", err);
*error_in = "MapViewOfFile";
return ALLOC_FAILURE;
} else {
char *mmap_base_file = get_mmap_base_file();
FILE *fp = fopen(mmap_base_file, "w");
err = GetLastError();
if(!fp) {
zend_win_error_message(ACCEL_LOG_WARNING, mmap_base_file, err);
zend_win_error_message(ACCEL_LOG_FATAL, "Unable to write base address", err);
}
fprintf(fp, "%p\n", mapping_base);
fclose(fp);
}
shared_segment->pos = 0;
shared_segment->size = requested_size;
return ALLOC_SUCCESS;
}