Merge branch 'PHP-7.4'

* PHP-7.4:
  Revert "Merge branch 'PHP-7.3' into PHP-7.4"

Author: cmb69

ext/opcache/shared_alloc_win32.c

@@ -33,11 +33,10 @@
 
 #define ACCEL_FILEMAP_NAME "ZendOPcache.SharedMemoryArea"
 #define ACCEL_MUTEX_NAME "ZendOPcache.SharedMemoryMutex"
+#define ACCEL_FILEMAP_BASE_DEFAULT 0x01000000
+#define ACCEL_FILEMAP_BASE "ZendOPcache.MemoryBase"
 #define ACCEL_EVENT_SOURCE "Zend OPcache"
 
-/* address of mapping base and address of execute_ex */
-#define ACCEL_BASE_POINTER_SIZE (2 * sizeof(void*))
-
 static HANDLE memfile = NULL, memory_mutex = NULL;
 static void *mapping_base;
 
@@ -76,6 +75,22 @@ static char *create_name_with_username(char *name)
 	return newname;
 }
 
+static char *get_mmap_base_file(void)
+{
+	static char windir[MAXPATHLEN+ 32 + 3 + sizeof("\\\\@") + 1 + 32 + 21];
+	int l;
+
+	GetTempPath(MAXPATHLEN, windir);
+	l = strlen(windir);
+	if ('\\' == windir[l-1]) {
+		l--;
+	}
+
+	snprintf(windir + l, sizeof(windir) - l - 1, "\\%s@%.32s@%.20s@%.32s", ACCEL_FILEMAP_BASE, accel_uname_id, sapi_module.name, accel_system_id);
+
+	return windir;
+}
+
 void zend_shared_alloc_create_lock(void)
 {
 	memory_mutex = CreateMutex(NULL, FALSE, create_name_with_username(ACCEL_MUTEX_NAME));
@@ -104,20 +119,39 @@ 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;
 	void *execute_ex_base;
 	int execute_ex_moved;
 
-	mapping_base = MapViewOfFileEx(memfile, FILE_MAP_ALL_ACCESS, 0, 0, ACCEL_BASE_POINTER_SIZE, NULL);
-	if (mapping_base == NULL) {
+	if (!fp) {
+		err = GetLastError();
+		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;
 	}
-	wanted_mapping_base = ((void**)mapping_base)[0];
-	execute_ex_base = ((void**)mapping_base)[1];
-	UnmapViewOfFile(mapping_base);
+	if (!fscanf(fp, "%p", &execute_ex_base)) {
+		err = GetLastError();
+		zend_win_error_message(ACCEL_LOG_FATAL, "Unable to read execute_ex base address", err);
+		*error_in="read execute_ex base";
+		fclose(fp);
+		return ALLOC_FAILURE;
+	}
+	fclose(fp);
+
+	if (0 > win32_utime(mmap_base_file, NULL)) {
+		err = GetLastError();
+		zend_win_error_message(ACCEL_LOG_WARNING, mmap_base_file, err);
+	}
 
 	execute_ex_moved = (void *)execute_ex != execute_ex_base;
 
@@ -182,7 +216,7 @@ static int zend_shared_alloc_reattach(size_t requested_size, char **error_in)
 		}
 	}
 
-	smm_shared_globals = (zend_smm_shared_globals *) ((char*)mapping_base + ACCEL_BASE_POINTER_SIZE);
+	smm_shared_globals = (zend_smm_shared_globals *) mapping_base;
 
 	return SUCCESSFULLY_REATTACHED;
 }
@@ -300,18 +334,29 @@ static int create_segments(size_t requested_size, zend_shared_segment ***shared_
 		*error_in = "MapViewOfFile";
 		return ALLOC_FAILURE;
 	} else {
+		char *mmap_base_file;
+		void *execute_ex_base = (void *)execute_ex;
+		FILE *fp;
 		DWORD old;
 
 		if (!VirtualProtect(mapping_base, requested_size, PAGE_READWRITE, &old)) {
 			err = GetLastError();
 			zend_win_error_message(ACCEL_LOG_FATAL, "VirtualProtect() failed", err);
 			return ALLOC_FAILURE;
 		}
-
-		((void**)mapping_base)[0] = mapping_base;
-		((void**)mapping_base)[1] = (void*)execute_ex;
-		((char*)shared_segment->p) += ACCEL_BASE_POINTER_SIZE;
+		mmap_base_file = get_mmap_base_file();
+		fp = fopen(mmap_base_file, "w");
+		if (!fp) {
+			err = GetLastError();
+			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);
+		fprintf(fp, "%p\n", execute_ex_base);
+		fclose(fp);
+	}
 
 	shared_segment->pos = 0;
 	shared_segment->size = requested_size;