php-src/Zend/zend.c

554 lines
16 KiB
C

/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2000 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 0.92 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.zend.com/license/0_92.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
#include "zend.h"
#include "zend_extensions.h"
#include "modules.h"
#include "zend_constants.h"
#include "zend_list.h"
#include "zend_API.h"
#include "zend_builtin_functions.h"
#ifdef ZTS
# define GLOBAL_FUNCTION_TABLE global_function_table
# define GLOBAL_CLASS_TABLE global_class_table
# define GLOBAL_CONSTANTS_TABLE global_constants_table
#else
# define GLOBAL_FUNCTION_TABLE CG(function_table)
# define GLOBAL_CLASS_TABLE CG(class_table)
# define GLOBAL_CONSTANTS_TABLE CG(zend_constants)
#endif
/* true multithread-shared globals */
ZEND_API zend_class_entry zend_standard_class_def;
ZEND_API int (*zend_printf)(const char *format, ...);
ZEND_API zend_write_func_t zend_write;
ZEND_API FILE *(*zend_fopen)(const char *filename, char **opened_path);
ZEND_API void (*zend_block_interruptions)(void);
ZEND_API void (*zend_unblock_interruptions)(void);
ZEND_API void (*zend_ticks_function)(int ticks);
static void (*zend_message_dispatcher_p)(long message, void *data);
static int (*zend_get_ini_entry_p)(char *name, uint name_length, zval *contents);
#if ZEND_NEW_ERROR_HANDLING
static void (*zend_error_cb)(int type, const char *format, ...);
#else
ZEND_API void (*zend_error_cb)(int type, const char *format, ...);
#endif
#ifdef ZTS
ZEND_API int compiler_globals_id;
ZEND_API int executor_globals_id;
ZEND_API int alloc_globals_id;
HashTable *global_function_table;
HashTable *global_class_table;
HashTable *global_constants_table;
#endif
zend_utility_values zend_uv;
ZEND_API zval zval_used_for_init; /* True global variable */
/* version information */
static char *zend_version_info;
static uint zend_version_info_length;
#define ZEND_CORE_VERSION_INFO "Zend Engine v" ZEND_VERSION ", Copyright (c) 1998-2000 Zend Technologies Ltd.\n"
#define PRINT_ZVAL_INDENT 4
static void print_hash(HashTable *ht, int indent)
{
zval **tmp;
char *string_key;
unsigned long num_key;
int i;
for (i=0; i<indent; i++) {
ZEND_PUTS(" ");
}
ZEND_PUTS("(\n");
indent += PRINT_ZVAL_INDENT;
zend_hash_internal_pointer_reset(ht);
while (zend_hash_get_current_data(ht, (void **) &tmp) == SUCCESS) {
for (i=0; i<indent; i++) {
ZEND_PUTS(" ");
}
ZEND_PUTS("[");
switch (zend_hash_get_current_key(ht, &string_key, &num_key)) {
case HASH_KEY_IS_STRING:
ZEND_PUTS(string_key);
efree(string_key);
break;
case HASH_KEY_IS_LONG:
zend_printf("%ld",num_key);
break;
}
ZEND_PUTS("] => ");
zend_print_zval_r(*tmp, indent+PRINT_ZVAL_INDENT);
ZEND_PUTS("\n");
zend_hash_move_forward(ht);
}
indent -= PRINT_ZVAL_INDENT;
for (i=0; i<indent; i++) {
ZEND_PUTS(" ");
}
ZEND_PUTS(")\n");
}
ZEND_API void zend_make_printable_zval(zval *expr, zval *expr_copy, int *use_copy)
{
if (expr->type==IS_STRING) {
*use_copy = 0;
return;
}
switch (expr->type) {
case IS_NULL:
expr_copy->value.str.len = 0;
expr_copy->value.str.val = empty_string;
break;
case IS_BOOL:
if (expr->value.lval) {
expr_copy->value.str.len = 1;
expr_copy->value.str.val = estrndup("1", 1);
} else {
expr_copy->value.str.len = 0;
expr_copy->value.str.val = empty_string;
}
break;
case IS_RESOURCE:
expr_copy->value.str.val = (char *) emalloc(sizeof("Resource id #")-1 + MAX_LENGTH_OF_LONG);
expr_copy->value.str.len = sprintf(expr_copy->value.str.val, "Resource id #%ld", expr->value.lval);
break;
case IS_ARRAY:
expr_copy->value.str.len = sizeof("Array")-1;
expr_copy->value.str.val = estrndup("Array", expr_copy->value.str.len);
break;
case IS_OBJECT: {
zval function_name;
ZVAL_STRING(&function_name,"__string_value",1);
if (call_user_function(NULL, expr, &function_name, expr_copy, 0, NULL)==FAILURE) {
expr_copy->value.str.len = sizeof("Object")-1;
expr_copy->value.str.val = estrndup("Object", expr_copy->value.str.len);
}
efree(function_name.value.str.val);
}
break;
default:
*expr_copy = *expr;
zval_copy_ctor(expr_copy);
convert_to_string(expr_copy);
break;
}
expr_copy->type = IS_STRING;
*use_copy = 1;
}
ZEND_API int zend_print_zval(zval *expr, int indent)
{
return zend_print_zval_ex(zend_write, expr, indent);
}
ZEND_API int zend_print_zval_ex(zend_write_func_t write_func, zval *expr, int indent)
{
zval expr_copy;
int use_copy;
zend_make_printable_zval(expr, &expr_copy, &use_copy);
if (use_copy) {
expr = &expr_copy;
}
if (expr->value.str.len==0) { /* optimize away empty strings */
if (use_copy) {
zval_dtor(expr);
}
return 0;
}
write_func(expr->value.str.val,expr->value.str.len);
if (use_copy) {
zval_dtor(expr);
}
return expr->value.str.len;
}
ZEND_API void zend_print_zval_r(zval *expr, int indent)
{
zend_print_zval_r_ex(zend_write, expr, indent);
}
ZEND_API void zend_print_zval_r_ex(zend_write_func_t write_func, zval *expr, int indent)
{
switch(expr->type) {
case IS_ARRAY:
ZEND_PUTS("Array\n");
print_hash(expr->value.ht,indent);
break;
case IS_OBJECT:
zend_printf("%s Object\n", expr->value.obj.ce->name);
print_hash(expr->value.obj.properties, indent);
break;
default:
zend_print_variable(expr);
break;
}
}
static FILE *zend_fopen_wrapper(const char *filename, char **opened_path)
{
if (opened_path) {
*opened_path = strdup(filename);
}
return fopen(filename, "r");
}
static void register_standard_class(void)
{
zend_standard_class_def.type = ZEND_INTERNAL_CLASS;
zend_standard_class_def.name_length = sizeof("stdClass") - 1;
zend_standard_class_def.name = zend_strndup("stdClass", zend_standard_class_def.name_length);
zend_standard_class_def.parent = NULL;
zend_hash_init(&zend_standard_class_def.default_properties, 0, NULL, ZVAL_PTR_DTOR, 1);
zend_hash_init(&zend_standard_class_def.function_table, 0, NULL, ZEND_FUNCTION_DTOR, 1);
zend_standard_class_def.handle_function_call = NULL;
zend_standard_class_def.handle_property_get = NULL;
zend_standard_class_def.handle_property_set = NULL;
zend_standard_class_def.refcount = (int *) malloc(sizeof(int));
*zend_standard_class_def.refcount = 1;
zend_hash_add(GLOBAL_CLASS_TABLE, "stdclass", sizeof("stdclass"), &zend_standard_class_def, sizeof(zend_class_entry), NULL);
}
#ifdef ZTS
static void compiler_globals_ctor(zend_compiler_globals *compiler_globals)
{
zend_function tmp_func;
zend_class_entry tmp_class;
compiler_globals->function_table = (HashTable *) malloc(sizeof(HashTable));
zend_hash_init(compiler_globals->function_table, 100, NULL, ZEND_FUNCTION_DTOR, 1);
zend_hash_copy(compiler_globals->function_table, global_function_table, NULL, &tmp_func, sizeof(zend_function));
compiler_globals->class_table = (HashTable *) malloc(sizeof(HashTable));
zend_hash_init(compiler_globals->class_table, 10, NULL, ZEND_CLASS_DTOR, 1);
zend_hash_copy(compiler_globals->class_table, global_class_table, (copy_ctor_func_t) zend_class_add_ref, &tmp_class, sizeof(zend_class_entry));
compiler_globals->extended_info = 0;
}
static void compiler_globals_dtor(zend_compiler_globals *compiler_globals)
{
if (compiler_globals->function_table != global_function_table) {
zend_hash_destroy(compiler_globals->function_table);
free(compiler_globals->function_table);
}
if (compiler_globals->class_table != global_class_table) {
zend_hash_destroy(compiler_globals->class_table);
free(compiler_globals->class_table);
}
}
static void executor_globals_ctor(zend_executor_globals *executor_globals)
{
if (global_constants_table) {
zend_startup_constants(ELS_C);
zend_copy_constants(executor_globals->zend_constants, global_constants_table);
}
zend_init_rsrc_plist(ELS_C);
}
static void executor_globals_dtor(zend_executor_globals *executor_globals)
{
zend_shutdown_constants(ELS_C);
zend_destroy_rsrc_plist(ELS_C);
}
static void alloc_globals_ctor(zend_alloc_globals *alloc_globals)
{
start_memory_manager(ALS_C);
}
#endif
int zend_startup(zend_utility_functions *utility_functions, char **extensions, int start_builtin_functions)
{
#ifdef ZTS
zend_compiler_globals *compiler_globals;
zend_executor_globals *executor_globals;
alloc_globals_id = ts_allocate_id(sizeof(zend_alloc_globals), (ts_allocate_ctor) alloc_globals_ctor, NULL);
#else
start_memory_manager(ALS_C);
#endif
/* Set up utility functions and values */
zend_error_cb = utility_functions->error_function;
zend_printf = utility_functions->printf_function;
zend_write = (zend_write_func_t) utility_functions->write_function;
zend_fopen = utility_functions->fopen_function;
if (!zend_fopen) {
zend_fopen = zend_fopen_wrapper;
}
zend_message_dispatcher_p = utility_functions->message_handler;
zend_block_interruptions = utility_functions->block_interruptions;
zend_unblock_interruptions = utility_functions->unblock_interruptions;
zend_get_ini_entry_p = utility_functions->get_ini_entry;
zend_ticks_function = utility_functions->ticks_function;
zend_compile_files = compile_files;
zend_execute = execute;
zend_llist_init(&zend_extensions, sizeof(zend_extension), (void (*)(void *)) zend_extension_dtor, 1);
/* set up version */
zend_version_info = strdup(ZEND_CORE_VERSION_INFO);
zend_version_info_length = sizeof(ZEND_CORE_VERSION_INFO)-1;
GLOBAL_FUNCTION_TABLE = (HashTable *) malloc(sizeof(HashTable));
GLOBAL_CLASS_TABLE = (HashTable *) malloc(sizeof(HashTable));
zend_hash_init(GLOBAL_FUNCTION_TABLE, 100, NULL, ZEND_FUNCTION_DTOR, 1);
zend_hash_init(GLOBAL_CLASS_TABLE, 10, NULL, ZEND_CLASS_DTOR, 1);
register_standard_class();
zend_hash_init(&module_registry, 50, NULL, ZEND_MODULE_DTOR, 1);
zend_init_rsrc_list_dtors();
/* This zval can be used to initialize allocate zval's to an uninit'ed value */
zval_used_for_init.is_ref = 0;
zval_used_for_init.refcount = 1;
zval_used_for_init.type = IS_NULL;
#ifdef ZTS
global_constants_table = NULL;
compiler_globals_id = ts_allocate_id(sizeof(zend_compiler_globals), (void (*)(void *)) compiler_globals_ctor, (void (*)(void *)) compiler_globals_dtor);
executor_globals_id = ts_allocate_id(sizeof(zend_executor_globals), (void (*)(void *)) executor_globals_ctor, (void (*)(void *)) executor_globals_dtor);
compiler_globals = ts_resource(compiler_globals_id);
executor_globals = ts_resource(executor_globals_id);
compiler_globals_dtor(compiler_globals);
compiler_globals->function_table = GLOBAL_FUNCTION_TABLE;
compiler_globals->class_table = GLOBAL_CLASS_TABLE;
zend_startup_constants(executor_globals);
GLOBAL_CONSTANTS_TABLE = EG(zend_constants);
#else
zend_startup_constants();
#endif
zend_register_standard_constants(ELS_C);
#ifndef ZTS
zend_init_rsrc_plist(ELS_C);
#endif
if (start_builtin_functions) {
zend_startup_builtin_functions();
}
return SUCCESS;
}
void zend_shutdown()
{
#ifndef ZTS
zend_destroy_rsrc_plist();
#endif
zend_destroy_rsrc_list_dtors();
zend_hash_destroy(&module_registry);
zend_hash_destroy(GLOBAL_FUNCTION_TABLE);
free(GLOBAL_FUNCTION_TABLE);
zend_hash_destroy(GLOBAL_CLASS_TABLE);
free(GLOBAL_CLASS_TABLE);
zend_shutdown_extensions();
free(zend_version_info);
#ifndef ZTS
zend_shutdown_constants();
#endif
}
void zend_set_utility_values(zend_utility_values *utility_values)
{
zend_uv = *utility_values;
zend_uv.import_use_extension_length = strlen(zend_uv.import_use_extension);
}
/* this should be compatible with the standard zenderror */
void zenderror(char *error)
{
zend_error(E_PARSE, error);
}
BEGIN_EXTERN_C()
ZEND_API void zend_bailout()
{
CLS_FETCH();
ELS_FETCH();
CG(unclean_shutdown) = 1;
longjmp(EG(bailout), FAILURE);
}
END_EXTERN_C()
void zend_append_version_info(zend_extension *extension)
{
char *new_info;
uint new_info_length;
new_info_length = sizeof(" with v, by \n")
+ strlen(extension->name)
+ strlen(extension->version)
+ strlen(extension->copyright)
+ strlen(extension->author);
new_info = (char *) malloc(new_info_length+1);
sprintf(new_info, " with %s v%s, %s, by %s\n", extension->name, extension->version, extension->copyright, extension->author);
zend_version_info = (char *) realloc(zend_version_info, zend_version_info_length+new_info_length+1);
strcat(zend_version_info, new_info);
zend_version_info_length += new_info_length;
free(new_info);
}
ZEND_API char *get_zend_version()
{
return zend_version_info;
}
void zend_activate(CLS_D ELS_DC)
{
init_compiler(CLS_C ELS_CC);
init_executor(CLS_C ELS_CC);
startup_scanner(CLS_C);
}
void zend_activate_modules()
{
zend_hash_apply(&module_registry, (int (*)(void *)) module_registry_request_startup);
}
void zend_deactivate(CLS_D ELS_DC)
{
zend_hash_apply(&module_registry, (int (*)(void *)) module_registry_cleanup);
shutdown_scanner(CLS_C);
shutdown_executor(ELS_C);
shutdown_compiler(CLS_C);
}
BEGIN_EXTERN_C()
ZEND_API void zend_message_dispatcher(long message, void *data)
{
if (zend_message_dispatcher_p) {
zend_message_dispatcher_p(message, data);
}
}
END_EXTERN_C()
ZEND_API int zend_get_ini_entry(char *name, uint name_length, zval *contents)
{
if (zend_get_ini_entry_p) {
return zend_get_ini_entry_p(name, name_length, contents);
} else {
return FAILURE;
}
}
#if ZEND_NEW_ERROR_HANDLING
#define ZEND_ERROR_BUFFER_SIZE 1024
ZEND_API void zend_error(int type, const char *format, ...)
{
va_list args;
zval **params;
zval retval;
zval error_type, error_message;
ELS_FETCH();
CLS_FETCH();
INIT_PZVAL(&error_message);
error_message.value.str.val = (char *) emalloc(ZEND_ERROR_BUFFER_SIZE);
va_start(args, format);
/* error_message.value.str.len = vsnprintf(error_message->value.str.val, error_message->value.str.len-1, format, args); */
error_message.value.str.len = vsprintf(error_message.value.str.val, format, args);
error_message.type = IS_STRING;
va_end(args);
/* if we don't have a user defined error handler */
if (!EG(user_error_handler)) {
zend_error_cb(type, error_message.value.str.val);
efree(error_message.value.str.val);
return;
}
/* or the error may not be safe to handle in user-space */
switch (type) {
case E_ERROR:
case E_PARSE:
case E_CORE_ERROR:
case E_CORE_WARNING:
case E_COMPILE_ERROR:
case E_COMPILE_WARNING:
zend_error_cb(type, error_message.value.str.val);
efree(error_message.value.str.val);
return;
}
/* Handle the error in user space */
error_type.value.lval = type;
error_type.type = IS_LONG;
params = (zval **) emalloc(sizeof(zval *)*2);
params[0] = &error_type;
params[1] = &error_message;
if (call_user_function(CG(function_table), NULL, EG(user_error_handler), &retval, 2, params)==SUCCESS) {
} else {
/* The user error handler failed, use built-in error handler */
zend_error_cb(type, error_message.value.str.val);
}
efree(params);
efree(error_message.value.str.val);
}
#endif