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zend_exceptions.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <[email protected]> |
| Marcus Boerger <[email protected]> |
| Sterling Hughes <[email protected]> |
| Zeev Suraski <[email protected]> |
+----------------------------------------------------------------------+
*/
#include "zend.h"
#include "zend_API.h"
#include "zend_builtin_functions.h"
#include "zend_interfaces.h"
#include "zend_exceptions.h"
#include "zend_vm.h"
#include "zend_dtrace.h"
#include "zend_smart_str.h"
#include "zend_exceptions_arginfo.h"
#include "zend_observer.h"
ZEND_API zend_class_entry *zend_ce_throwable;
ZEND_API zend_class_entry *zend_ce_exception;
ZEND_API zend_class_entry *zend_ce_error_exception;
ZEND_API zend_class_entry *zend_ce_error;
ZEND_API zend_class_entry *zend_ce_compile_error;
ZEND_API zend_class_entry *zend_ce_parse_error;
ZEND_API zend_class_entry *zend_ce_type_error;
ZEND_API zend_class_entry *zend_ce_argument_count_error;
ZEND_API zend_class_entry *zend_ce_value_error;
ZEND_API zend_class_entry *zend_ce_arithmetic_error;
ZEND_API zend_class_entry *zend_ce_division_by_zero_error;
ZEND_API zend_class_entry *zend_ce_unhandled_match_error;
ZEND_API zend_class_entry *zend_ce_request_parse_body_exception;
/* Internal pseudo-exception that is not exposed to userland. Throwing this exception *does not* execute finally blocks. */
static zend_class_entry zend_ce_unwind_exit;
/* Internal pseudo-exception that is not exposed to userland. Throwing this exception *does* execute finally blocks. */
static zend_class_entry zend_ce_graceful_exit;
ZEND_API void (*zend_throw_exception_hook)(zend_object *ex);
static zend_object_handlers default_exception_handlers;
/* {{{ zend_implement_throwable */
static int zend_implement_throwable(zend_class_entry *interface, zend_class_entry *class_type)
{
/* zend_ce_exception and zend_ce_error may not be initialized yet when this is called (e.g when
* implementing Throwable for Exception itself). Perform a manual inheritance check. */
zend_class_entry *root = class_type;
while (root->parent) {
root = root->parent;
}
if (zend_string_equals_literal(root->name, "Exception")
|| zend_string_equals_literal(root->name, "Error")) {
return SUCCESS;
}
bool can_extend = (class_type->ce_flags & ZEND_ACC_ENUM) == 0;
zend_error_noreturn(E_ERROR,
can_extend
? "%s %s cannot implement interface %s, extend Exception or Error instead"
: "%s %s cannot implement interface %s",
zend_get_object_type_uc(class_type),
ZSTR_VAL(class_type->name),
ZSTR_VAL(interface->name));
return FAILURE;
}
/* }}} */
static inline zend_class_entry *i_get_exception_base(zend_object *object) /* {{{ */
{
return instanceof_function(object->ce, zend_ce_exception) ? zend_ce_exception : zend_ce_error;
}
/* }}} */
ZEND_API zend_class_entry *zend_get_exception_base(zend_object *object) /* {{{ */
{
return i_get_exception_base(object);
}
/* }}} */
void zend_exception_set_previous(zend_object *exception, zend_object *add_previous) /* {{{ */
{
zval *previous, *ancestor, *ex;
zval pv, zv, rv;
zend_class_entry *base_ce;
if (!exception || !add_previous) {
return;
}
if (exception == add_previous || zend_is_unwind_exit(add_previous) || zend_is_graceful_exit(add_previous)) {
OBJ_RELEASE(add_previous);
return;
}
ZEND_ASSERT(instanceof_function(add_previous->ce, zend_ce_throwable)
&& "Previous exception must implement Throwable");
ZVAL_OBJ(&pv, add_previous);
ZVAL_OBJ(&zv, exception);
ex = &zv;
do {
ancestor = zend_read_property_ex(i_get_exception_base(add_previous), add_previous, ZSTR_KNOWN(ZEND_STR_PREVIOUS), 1, &rv);
ZVAL_DEREF(ancestor);
while (Z_TYPE_P(ancestor) == IS_OBJECT) {
if (Z_OBJ_P(ancestor) == Z_OBJ_P(ex)) {
OBJ_RELEASE(add_previous);
return;
}
ancestor = zend_read_property_ex(i_get_exception_base(Z_OBJ_P(ancestor)), Z_OBJ_P(ancestor), ZSTR_KNOWN(ZEND_STR_PREVIOUS), 1, &rv);
ZVAL_DEREF(ancestor);
}
base_ce = i_get_exception_base(Z_OBJ_P(ex));
previous = zend_read_property_ex(base_ce, Z_OBJ_P(ex), ZSTR_KNOWN(ZEND_STR_PREVIOUS), 1, &rv);
ZVAL_DEREF(previous);
if (Z_TYPE_P(previous) == IS_NULL) {
zend_update_property_ex(base_ce, Z_OBJ_P(ex), ZSTR_KNOWN(ZEND_STR_PREVIOUS), &pv);
GC_DELREF(add_previous);
return;
}
ex = previous;
} while (Z_OBJ_P(ex) != add_previous);
}
/* }}} */
void zend_exception_save(void) /* {{{ */
{
if (EG(prev_exception)) {
zend_exception_set_previous(EG(exception), EG(prev_exception));
}
if (EG(exception)) {
EG(prev_exception) = EG(exception);
}
EG(exception) = NULL;
}
/* }}} */
void zend_exception_restore(void) /* {{{ */
{
if (EG(prev_exception)) {
if (EG(exception)) {
zend_exception_set_previous(EG(exception), EG(prev_exception));
} else {
EG(exception) = EG(prev_exception);
}
EG(prev_exception) = NULL;
}
}
/* }}} */
static zend_always_inline bool is_handle_exception_set(void) {
zend_execute_data *execute_data = EG(current_execute_data);
return !execute_data
|| !execute_data->func
|| !ZEND_USER_CODE(execute_data->func->common.type)
|| execute_data->opline->opcode == ZEND_HANDLE_EXCEPTION;
}
ZEND_API ZEND_COLD void zend_throw_exception_internal(zend_object *exception) /* {{{ */
{
#ifdef HAVE_DTRACE
if (DTRACE_EXCEPTION_THROWN_ENABLED()) {
if (exception != NULL) {
DTRACE_EXCEPTION_THROWN(ZSTR_VAL(exception->ce->name));
} else {
DTRACE_EXCEPTION_THROWN(NULL);
}
}
#endif /* HAVE_DTRACE */
if (exception != NULL) {
zend_object *previous = EG(exception);
if (previous && zend_is_unwind_exit(previous)) {
/* Don't replace unwinding exception with different exception. */
OBJ_RELEASE(exception);
return;
}
zend_exception_set_previous(exception, EG(exception));
EG(exception) = exception;
if (previous) {
return;
}
}
if (!EG(current_execute_data)) {
if (exception && (exception->ce == zend_ce_parse_error || exception->ce == zend_ce_compile_error)) {
return;
}
if (EG(exception)) {
if (Z_TYPE(EG(user_exception_handler)) != IS_UNDEF
&& !zend_is_unwind_exit(EG(exception))
&& !zend_is_graceful_exit(EG(exception))) {
zend_user_exception_handler();
if (EG(exception)) {
zend_exception_error(EG(exception), E_ERROR);
}
return;
} else {
zend_exception_error(EG(exception), E_ERROR);
}
zend_bailout();
}
zend_error_noreturn(E_CORE_ERROR, "Exception thrown without a stack frame");
}
if (zend_throw_exception_hook) {
zend_throw_exception_hook(exception);
}
if (is_handle_exception_set()) {
/* no need to rethrow the exception */
return;
}
EG(opline_before_exception) = EG(current_execute_data)->opline;
EG(current_execute_data)->opline = EG(exception_op);
}
/* }}} */
ZEND_API void zend_clear_exception(void) /* {{{ */
{
zend_object *exception;
if (EG(prev_exception)) {
OBJ_RELEASE(EG(prev_exception));
EG(prev_exception) = NULL;
}
if (!EG(exception)) {
return;
}
/* exception may have destructor */
exception = EG(exception);
EG(exception) = NULL;
OBJ_RELEASE(exception);
if (EG(current_execute_data)) {
EG(current_execute_data)->opline = EG(opline_before_exception);
}
#if ZEND_DEBUG
EG(opline_before_exception) = NULL;
#endif
}
/* }}} */
/* Same as OBJ_PROP_NUM(), but checks the offset is correct when Zend is built in debug mode. */
static zend_always_inline zval *zend_obj_prop_num_checked(zend_object *object, uint32_t prop_num, zend_string *str)
{
#if ZEND_DEBUG
zend_class_entry *old_scope = EG(fake_scope);
EG(fake_scope) = i_get_exception_base(object);
const zend_property_info *prop_info = zend_get_property_info(object->ce, str, true);
ZEND_ASSERT(OBJ_PROP_TO_NUM(prop_info->offset) == prop_num);
EG(fake_scope) = old_scope;
#else
ZEND_IGNORE_VALUE(str);
#endif
return OBJ_PROP_NUM(object, prop_num);
}
static zend_object *zend_default_exception_new(zend_class_entry *class_type) /* {{{ */
{
zend_string *filename;
zend_object *object = zend_objects_new(class_type);
object_properties_init(object, class_type);
zval *trace = zend_obj_prop_num_checked(object, 5, ZSTR_KNOWN(ZEND_STR_TRACE));
if (EG(current_execute_data)) {
zend_fetch_debug_backtrace(trace,
0,
EG(exception_ignore_args) ? DEBUG_BACKTRACE_IGNORE_ARGS : 0, 0);
} else {
ZVAL_EMPTY_ARRAY(trace);
}
if (EXPECTED((class_type != zend_ce_parse_error && class_type != zend_ce_compile_error)
|| !(filename = zend_get_compiled_filename()))) {
ZVAL_STRING(zend_obj_prop_num_checked(object, 3, ZSTR_KNOWN(ZEND_STR_FILE)), zend_get_executed_filename());
ZVAL_LONG(zend_obj_prop_num_checked(object, 4, ZSTR_KNOWN(ZEND_STR_LINE)), zend_get_executed_lineno());
} else {
ZVAL_STR_COPY(zend_obj_prop_num_checked(object, 3, ZSTR_KNOWN(ZEND_STR_FILE)), filename);
ZVAL_LONG(zend_obj_prop_num_checked(object, 4, ZSTR_KNOWN(ZEND_STR_LINE)), zend_get_compiled_lineno());
}
return object;
}
/* }}} */
/* {{{ Clone the exception object */
ZEND_COLD ZEND_METHOD(Exception, __clone)
{
/* __clone() is private but this is reachable with reflection */
zend_throw_exception(NULL, "Cannot clone object using __clone()", 0);
}
/* }}} */
/* {{{ Exception constructor */
ZEND_METHOD(Exception, __construct)
{
zend_string *message = NULL;
zend_long code = 0;
zval *object, *previous = NULL;
object = ZEND_THIS;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|SlO!", &message, &code, &previous, zend_ce_throwable) == FAILURE) {
RETURN_THROWS();
}
if (message) {
zval *tmp = zend_obj_prop_num_checked(Z_OBJ_P(object), 0, ZSTR_KNOWN(ZEND_STR_MESSAGE));
zval_ptr_dtor(tmp);
ZVAL_STR_COPY(tmp, message);
}
if (code) {
zval *tmp = zend_obj_prop_num_checked(Z_OBJ_P(object), 2, ZSTR_KNOWN(ZEND_STR_CODE));
zval_ptr_dtor(tmp);
ZVAL_LONG(tmp, code);
}
if (previous) {
zval *tmp = zend_obj_prop_num_checked(Z_OBJ_P(object), 6, ZSTR_KNOWN(ZEND_STR_PREVIOUS));
zval_ptr_dtor(tmp);
ZVAL_COPY(tmp, previous);
}
}
/* }}} */
/* {{{ Exception unserialize checks */
#define CHECK_EXC_TYPE(id, type) \
pvalue = zend_read_property_ex(i_get_exception_base(Z_OBJ_P(object)), Z_OBJ_P(object), ZSTR_KNOWN(id), 1, &value); \
if (Z_TYPE_P(pvalue) != IS_NULL && Z_TYPE_P(pvalue) != type) { \
zend_unset_property(i_get_exception_base(Z_OBJ_P(object)), Z_OBJ_P(object), ZSTR_VAL(ZSTR_KNOWN(id)), ZSTR_LEN(ZSTR_KNOWN(id))); \
}
ZEND_METHOD(Exception, __wakeup)
{
ZEND_PARSE_PARAMETERS_NONE();
zval value, *pvalue;
zval *object = ZEND_THIS;
CHECK_EXC_TYPE(ZEND_STR_MESSAGE, IS_STRING);
CHECK_EXC_TYPE(ZEND_STR_CODE, IS_LONG);
/* The type of all other properties is enforced through typed properties. */
}
/* }}} */
/* {{{ ErrorException constructor */
ZEND_METHOD(ErrorException, __construct)
{
zend_string *message = NULL, *filename = NULL;
zend_long code = 0, severity = E_ERROR, lineno;
bool lineno_is_null = 1;
zval *object, *previous = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|SllS!l!O!", &message, &code, &severity, &filename, &lineno, &lineno_is_null, &previous, zend_ce_throwable) == FAILURE) {
RETURN_THROWS();
}
object = ZEND_THIS;
if (message) {
zval *tmp = zend_obj_prop_num_checked(Z_OBJ_P(object), 0, ZSTR_KNOWN(ZEND_STR_MESSAGE));
zval_ptr_dtor(tmp);
ZVAL_STR_COPY(tmp, message);
}
if (code) {
zval *tmp = zend_obj_prop_num_checked(Z_OBJ_P(object), 2, ZSTR_KNOWN(ZEND_STR_CODE));
zval_ptr_dtor(tmp);
ZVAL_LONG(tmp, code);
}
if (previous) {
zval *tmp = zend_obj_prop_num_checked(Z_OBJ_P(object), 6, ZSTR_KNOWN(ZEND_STR_PREVIOUS));
zval_ptr_dtor(tmp);
ZVAL_COPY(tmp, previous);
}
{
zval *tmp = zend_obj_prop_num_checked(Z_OBJ_P(object), 7, ZSTR_KNOWN(ZEND_STR_SEVERITY));
zval_ptr_dtor(tmp);
ZVAL_LONG(tmp, severity);
}
if (filename) {
zval *tmp = zend_obj_prop_num_checked(Z_OBJ_P(object), 3, ZSTR_KNOWN(ZEND_STR_FILE));
zval_ptr_dtor(tmp);
ZVAL_STR_COPY(tmp, filename);
}
zval *tmp = zend_obj_prop_num_checked(Z_OBJ_P(object), 4, ZSTR_KNOWN(ZEND_STR_LINE));
zval_ptr_dtor(tmp);
if (!lineno_is_null) {
ZVAL_LONG(tmp, lineno);
} else if (filename) {
ZVAL_LONG(tmp, 0);
}
}
/* }}} */
#define GET_PROPERTY(object, id) \
zend_read_property_ex(i_get_exception_base(Z_OBJ_P(object)), Z_OBJ_P(object), ZSTR_KNOWN(id), 0, &rv)
#define GET_PROPERTY_SILENT(object, id) \
zend_read_property_ex(i_get_exception_base(Z_OBJ_P(object)), Z_OBJ_P(object), ZSTR_KNOWN(id), 1, &rv)
/* {{{ Get the file in which the exception occurred */
ZEND_METHOD(Exception, getFile)
{
zval *prop, rv;
ZEND_PARSE_PARAMETERS_NONE();
prop = GET_PROPERTY(ZEND_THIS, ZEND_STR_FILE);
RETURN_STR(zval_get_string(prop));
}
/* }}} */
/* {{{ Get the line in which the exception occurred */
ZEND_METHOD(Exception, getLine)
{
zval *prop, rv;
ZEND_PARSE_PARAMETERS_NONE();
prop = GET_PROPERTY(ZEND_THIS, ZEND_STR_LINE);
RETURN_LONG(zval_get_long(prop));
}
/* }}} */
/* {{{ Get the exception message */
ZEND_METHOD(Exception, getMessage)
{
zval *prop, rv;
ZEND_PARSE_PARAMETERS_NONE();
prop = GET_PROPERTY(ZEND_THIS, ZEND_STR_MESSAGE);
RETURN_STR(zval_get_string(prop));
}
/* }}} */
/* {{{ Get the exception code */
ZEND_METHOD(Exception, getCode)
{
zval *prop, rv;
ZEND_PARSE_PARAMETERS_NONE();
prop = GET_PROPERTY(ZEND_THIS, ZEND_STR_CODE);
ZVAL_DEREF(prop);
ZVAL_COPY(return_value, prop);
}
/* }}} */
/* {{{ Get the stack trace for the location in which the exception occurred */
ZEND_METHOD(Exception, getTrace)
{
zval *prop, rv;
ZEND_PARSE_PARAMETERS_NONE();
prop = GET_PROPERTY(ZEND_THIS, ZEND_STR_TRACE);
ZVAL_DEREF(prop);
ZVAL_COPY(return_value, prop);
}
/* }}} */
/* {{{ Get the exception severity */
ZEND_METHOD(ErrorException, getSeverity)
{
zval *prop, rv;
ZEND_PARSE_PARAMETERS_NONE();
prop = GET_PROPERTY(ZEND_THIS, ZEND_STR_SEVERITY);
ZVAL_DEREF(prop);
ZVAL_COPY(return_value, prop);
}
/* }}} */
#define TRACE_APPEND_KEY(key) do { \
tmp = zend_hash_find(ht, key); \
if (tmp) { \
if (Z_TYPE_P(tmp) != IS_STRING) { \
zend_error(E_WARNING, "Value for %s is not a string", \
ZSTR_VAL(key)); \
smart_str_appends(str, "[unknown]"); \
} else { \
smart_str_appends(str, Z_STRVAL_P(tmp)); \
} \
} \
} while (0)
static void _build_trace_args(zval *arg, smart_str *str) /* {{{ */
{
/* the trivial way would be to do
* convert_to_string(arg);
* append it and kill the now tmp arg.
* but that could cause some E_NOTICE and also damn long lines.
*/
ZVAL_DEREF(arg);
if (smart_str_append_zval(str, arg, EG(exception_string_param_max_len)) == SUCCESS) {
smart_str_appends(str, ", ");
} else {
switch (Z_TYPE_P(arg)) {
case IS_RESOURCE:
smart_str_appends(str, "Resource id #");
smart_str_append_long(str, Z_RES_HANDLE_P(arg));
smart_str_appends(str, ", ");
break;
case IS_ARRAY:
smart_str_appends(str, "Array, ");
break;
case IS_OBJECT: {
zend_string *class_name = Z_OBJ_HANDLER_P(arg, get_class_name)(Z_OBJ_P(arg));
smart_str_appends(str, "Object(");
smart_str_appends(str, ZSTR_VAL(class_name));
smart_str_appends(str, "), ");
zend_string_release_ex(class_name, 0);
break;
}
}
}
}
/* }}} */
static void _build_trace_string(smart_str *str, const HashTable *ht, uint32_t num) /* {{{ */
{
zval *file, *tmp;
smart_str_appendc(str, '#');
smart_str_append_long(str, num);
smart_str_appendc(str, ' ');
file = zend_hash_find_known_hash(ht, ZSTR_KNOWN(ZEND_STR_FILE));
if (file) {
if (UNEXPECTED(Z_TYPE_P(file) != IS_STRING)) {
zend_error(E_WARNING, "File name is not a string");
smart_str_appends(str, "[unknown file]: ");
} else{
zend_long line = 0;
tmp = zend_hash_find_known_hash(ht, ZSTR_KNOWN(ZEND_STR_LINE));
if (tmp) {
if (EXPECTED(Z_TYPE_P(tmp) == IS_LONG)) {
line = Z_LVAL_P(tmp);
} else {
zend_error(E_WARNING, "Line is not an int");
}
}
smart_str_append(str, Z_STR_P(file));
smart_str_appendc(str, '(');
smart_str_append_long(str, line);
smart_str_appends(str, "): ");
}
} else {
smart_str_appends(str, "[internal function]: ");
}
TRACE_APPEND_KEY(ZSTR_KNOWN(ZEND_STR_CLASS));
TRACE_APPEND_KEY(ZSTR_KNOWN(ZEND_STR_TYPE));
TRACE_APPEND_KEY(ZSTR_KNOWN(ZEND_STR_FUNCTION));
smart_str_appendc(str, '(');
tmp = zend_hash_find_known_hash(ht, ZSTR_KNOWN(ZEND_STR_ARGS));
if (tmp) {
if (EXPECTED(Z_TYPE_P(tmp) == IS_ARRAY)) {
size_t last_len = ZSTR_LEN(str->s);
zend_string *name;
zval *arg;
ZEND_HASH_FOREACH_STR_KEY_VAL(Z_ARRVAL_P(tmp), name, arg) {
if (name) {
smart_str_append(str, name);
smart_str_appends(str, ": ");
}
_build_trace_args(arg, str);
} ZEND_HASH_FOREACH_END();
if (last_len != ZSTR_LEN(str->s)) {
ZSTR_LEN(str->s) -= 2; /* remove last ', ' */
}
} else {
zend_error(E_WARNING, "args element is not an array");
}
}
smart_str_appends(str, ")\n");
}
/* }}} */
ZEND_API zend_string *zend_trace_to_string(const HashTable *trace, bool include_main) {
zend_ulong index;
zval *frame;
uint32_t num = 0;
smart_str str = {0};
ZEND_HASH_FOREACH_NUM_KEY_VAL(trace, index, frame) {
if (UNEXPECTED(Z_TYPE_P(frame) != IS_ARRAY)) {
zend_error(E_WARNING, "Expected array for frame " ZEND_ULONG_FMT, index);
continue;
}
_build_trace_string(&str, Z_ARRVAL_P(frame), num++);
} ZEND_HASH_FOREACH_END();
if (include_main) {
smart_str_appendc(&str, '#');
smart_str_append_long(&str, num);
smart_str_appends(&str, " {main}");
}
smart_str_0(&str);
return str.s ? str.s : ZSTR_EMPTY_ALLOC();
}
/* {{{ Obtain the backtrace for the exception as a string (instead of an array) */
ZEND_METHOD(Exception, getTraceAsString)
{
ZEND_PARSE_PARAMETERS_NONE();
zval *object = ZEND_THIS;
zend_class_entry *base_ce = i_get_exception_base(Z_OBJ_P(object));
zval rv;
const zval *trace = zend_read_property_ex(base_ce, Z_OBJ_P(object), ZSTR_KNOWN(ZEND_STR_TRACE), 1, &rv);
if (EG(exception)) {
RETURN_THROWS();
}
ZVAL_DEREF(trace);
/* Type should be guaranteed by property type. */
ZEND_ASSERT(Z_TYPE_P(trace) == IS_ARRAY);
RETURN_NEW_STR(zend_trace_to_string(Z_ARRVAL_P(trace), /* include_main */ true));
}
/* }}} */
/* {{{ Return previous Throwable or NULL. */
ZEND_METHOD(Exception, getPrevious)
{
zval rv;
ZEND_PARSE_PARAMETERS_NONE();
ZVAL_COPY_DEREF(return_value, GET_PROPERTY_SILENT(ZEND_THIS, ZEND_STR_PREVIOUS));
} /* }}} */
/* {{{ Obtain the string representation of the Exception object */
ZEND_METHOD(Exception, __toString)
{
zval trace, *exception;
zend_class_entry *base_ce;
zend_string *str;
zend_fcall_info fci;
zval rv, tmp;
zend_string *fname;
ZEND_PARSE_PARAMETERS_NONE();
str = ZSTR_EMPTY_ALLOC();
exception = ZEND_THIS;
fname = ZSTR_INIT_LITERAL("gettraceasstring", 0);
while (exception && Z_TYPE_P(exception) == IS_OBJECT && instanceof_function(Z_OBJCE_P(exception), zend_ce_throwable)) {
zend_string *prev_str = str;
zend_string *message = zval_get_string(GET_PROPERTY(exception, ZEND_STR_MESSAGE));
zend_string *file = zval_get_string(GET_PROPERTY(exception, ZEND_STR_FILE));
zend_long line = zval_get_long(GET_PROPERTY(exception, ZEND_STR_LINE));
fci.size = sizeof(fci);
ZVAL_STR(&fci.function_name, fname);
fci.object = Z_OBJ_P(exception);
fci.retval = &trace;
fci.param_count = 0;
fci.params = NULL;
fci.named_params = NULL;
zend_call_function(&fci, NULL);
if (Z_TYPE(trace) != IS_STRING) {
zval_ptr_dtor(&trace);
ZVAL_UNDEF(&trace);
}
if ((Z_OBJCE_P(exception) == zend_ce_type_error || Z_OBJCE_P(exception) == zend_ce_argument_count_error) && strstr(ZSTR_VAL(message), ", called in ")) {
zend_string *real_message = zend_strpprintf_unchecked(0, "%S and defined", message);
zend_string_release_ex(message, 0);
message = real_message;
}
zend_string *tmp_trace = (Z_TYPE(trace) == IS_STRING && Z_STRLEN(trace))
? zend_string_copy(Z_STR(trace))
: ZSTR_INIT_LITERAL("#0 {main}\n", false);
zend_string *name = Z_OBJCE_P(exception)->name;
if (ZSTR_LEN(message) > 0) {
zval message_zv;
ZVAL_STR(&message_zv, message);
str = zend_strpprintf_unchecked(0, "%S: %S in %S:" ZEND_LONG_FMT "\nStack trace:\n%S%s%S",
name, message, file, line,
tmp_trace, ZSTR_LEN(prev_str) ? "\n\nNext " : "", prev_str);
} else {
str = zend_strpprintf_unchecked(0, "%S in %S:" ZEND_LONG_FMT "\nStack trace:\n%S%s%S",
name, file, line,
tmp_trace, ZSTR_LEN(prev_str) ? "\n\nNext " : "", prev_str);
}
zend_string_release_ex(tmp_trace, false);
zend_string_release_ex(prev_str, 0);
zend_string_release_ex(message, 0);
zend_string_release_ex(file, 0);
zval_ptr_dtor(&trace);
Z_PROTECT_RECURSION_P(exception);
exception = GET_PROPERTY(exception, ZEND_STR_PREVIOUS);
ZVAL_DEREF(exception);
if (Z_TYPE_P(exception) == IS_OBJECT && Z_IS_RECURSIVE_P(exception)) {
break;
}
}
zend_string_release_ex(fname, 0);
exception = ZEND_THIS;
/* Reset apply counts */
while (Z_TYPE_P(exception) == IS_OBJECT && (base_ce = i_get_exception_base(Z_OBJ_P(exception))) && instanceof_function(Z_OBJCE_P(exception), base_ce)) {
if (Z_IS_RECURSIVE_P(exception)) {
Z_UNPROTECT_RECURSION_P(exception);
} else {
break;
}
exception = GET_PROPERTY(exception, ZEND_STR_PREVIOUS);
ZVAL_DEREF(exception);
}
exception = ZEND_THIS;
base_ce = i_get_exception_base(Z_OBJ_P(exception));
/* We store the result in the private property string so we can access
* the result in uncaught exception handlers without memleaks. */
ZVAL_STR(&tmp, str);
zend_update_property_ex(base_ce, Z_OBJ_P(exception), ZSTR_KNOWN(ZEND_STR_STRING), &tmp);
RETURN_STR(str);
}
/* }}} */
static void zend_init_exception_class_entry(zend_class_entry *ce) {
ce->create_object = zend_default_exception_new;
ce->default_object_handlers = &default_exception_handlers;
}
void zend_register_default_exception(void) /* {{{ */
{
zend_ce_throwable = register_class_Throwable(zend_ce_stringable);
zend_ce_throwable->interface_gets_implemented = zend_implement_throwable;
memcpy(&default_exception_handlers, &std_object_handlers, sizeof(zend_object_handlers));
default_exception_handlers.clone_obj = NULL;
zend_ce_exception = register_class_Exception(zend_ce_throwable);
zend_init_exception_class_entry(zend_ce_exception);
zend_ce_error_exception = register_class_ErrorException(zend_ce_exception);
zend_init_exception_class_entry(zend_ce_error_exception);
zend_ce_error = register_class_Error(zend_ce_throwable);
zend_init_exception_class_entry(zend_ce_error);
zend_ce_compile_error = register_class_CompileError(zend_ce_error);
zend_init_exception_class_entry(zend_ce_compile_error);
zend_ce_parse_error = register_class_ParseError(zend_ce_compile_error);
zend_init_exception_class_entry(zend_ce_parse_error);
zend_ce_type_error = register_class_TypeError(zend_ce_error);
zend_init_exception_class_entry(zend_ce_type_error);
zend_ce_argument_count_error = register_class_ArgumentCountError(zend_ce_type_error);
zend_init_exception_class_entry(zend_ce_argument_count_error);
zend_ce_value_error = register_class_ValueError(zend_ce_error);
zend_init_exception_class_entry(zend_ce_value_error);
zend_ce_arithmetic_error = register_class_ArithmeticError(zend_ce_error);
zend_init_exception_class_entry(zend_ce_arithmetic_error);
zend_ce_division_by_zero_error = register_class_DivisionByZeroError(zend_ce_arithmetic_error);
zend_init_exception_class_entry(zend_ce_division_by_zero_error);
zend_ce_unhandled_match_error = register_class_UnhandledMatchError(zend_ce_error);
zend_init_exception_class_entry(zend_ce_unhandled_match_error);
zend_ce_request_parse_body_exception = register_class_RequestParseBodyException(zend_ce_exception);
zend_init_exception_class_entry(zend_ce_request_parse_body_exception);
INIT_CLASS_ENTRY(zend_ce_unwind_exit, "UnwindExit", NULL);
INIT_CLASS_ENTRY(zend_ce_graceful_exit, "GracefulExit", NULL);
}
/* }}} */
/* {{{ Deprecated - Use zend_ce_exception directly instead */
ZEND_API zend_class_entry *zend_exception_get_default(void)
{
return zend_ce_exception;
}
/* }}} */
/* {{{ Deprecated - Use zend_ce_error_exception directly instead */
ZEND_API zend_class_entry *zend_get_error_exception(void)
{
return zend_ce_error_exception;
}
/* }}} */
static zend_object *zend_throw_exception_zstr(zend_class_entry *exception_ce, zend_string *message, zend_long code) /* {{{ */
{
zval ex, tmp;
if (!exception_ce) {
exception_ce = zend_ce_exception;
}
ZEND_ASSERT(instanceof_function(exception_ce, zend_ce_throwable)
&& "Exceptions must implement Throwable");
object_init_ex(&ex, exception_ce);
if (message) {
ZVAL_STR(&tmp, message);
zend_update_property_ex(exception_ce, Z_OBJ(ex), ZSTR_KNOWN(ZEND_STR_MESSAGE), &tmp);
}
if (code) {
ZVAL_LONG(&tmp, code);
zend_update_property_ex(exception_ce, Z_OBJ(ex), ZSTR_KNOWN(ZEND_STR_CODE), &tmp);
}
zend_throw_exception_internal(Z_OBJ(ex));
return Z_OBJ(ex);
}
/* }}} */
ZEND_API ZEND_COLD zend_object *zend_throw_exception(zend_class_entry *exception_ce, const char *message, zend_long code) /* {{{ */
{
zend_string *msg_str = message ? zend_string_init(message, strlen(message), 0) : NULL;
zend_object *ex = zend_throw_exception_zstr(exception_ce, msg_str, code);
if (msg_str) {
zend_string_release(msg_str);
}
return ex;
}
/* }}} */
ZEND_API ZEND_COLD zend_object *zend_throw_exception_ex(zend_class_entry *exception_ce, zend_long code, const char *format, ...) /* {{{ */
{
va_list arg;
zend_object *obj;
va_start(arg, format);
zend_string *msg_str = zend_vstrpprintf(0, format, arg);
va_end(arg);
obj = zend_throw_exception_zstr(exception_ce, msg_str, code);
zend_string_release(msg_str);
return obj;
}
/* }}} */
ZEND_API ZEND_COLD zend_object *zend_throw_error_exception(zend_class_entry *exception_ce, zend_string *message, zend_long code, int severity) /* {{{ */
{
zend_object *obj = zend_throw_exception_zstr(exception_ce, message, code);
if (exception_ce && instanceof_function(exception_ce, zend_ce_error_exception)) {
zval tmp;
ZVAL_LONG(&tmp, severity);
zend_update_property_ex(zend_ce_error_exception, obj, ZSTR_KNOWN(ZEND_STR_SEVERITY), &tmp);
}
return obj;
}
/* }}} */
static void zend_error_va(int type, zend_string *file, uint32_t lineno, const char *format, ...) /* {{{ */
{
va_list args;
va_start(args, format);
zend_string *message = zend_vstrpprintf(0, format, args);
zend_observer_error_notify(type, file, lineno, message);
zend_error_cb(type, file, lineno, message);
zend_string_release(message);
va_end(args);
}
/* }}} */
/* This function doesn't return if it uses E_ERROR */
ZEND_API ZEND_COLD zend_result zend_exception_error(zend_object *ex, int severity) /* {{{ */
{
zval exception, rv;
zend_class_entry *ce_exception;
zend_result result = FAILURE;
ZVAL_OBJ(&exception, ex);
ce_exception = ex->ce;
EG(exception) = NULL;
zval_ptr_dtor(&EG(last_fatal_error_backtrace));
ZVAL_UNDEF(&EG(last_fatal_error_backtrace));
if (ce_exception == zend_ce_parse_error || ce_exception == zend_ce_compile_error) {
zend_string *message = zval_get_string(GET_PROPERTY(&exception, ZEND_STR_MESSAGE));
zend_string *file = zval_get_string(GET_PROPERTY_SILENT(&exception, ZEND_STR_FILE));
zend_long line = zval_get_long(GET_PROPERTY_SILENT(&exception, ZEND_STR_LINE));
int type = (ce_exception == zend_ce_parse_error ? E_PARSE : E_COMPILE_ERROR) | E_DONT_BAIL;
zend_observer_error_notify(type, file, line, message);
zend_error_cb(type, file, line, message);
zend_string_release_ex(file, 0);
zend_string_release_ex(message, 0);
} else if (instanceof_function(ce_exception, zend_ce_throwable)) {
zval tmp;
zend_string *str, *file = NULL;
zend_long line = 0;
zend_call_known_instance_method_with_0_params(ex->ce->__tostring, ex, &tmp);
if (!EG(exception)) {
if (Z_TYPE(tmp) != IS_STRING) {
zend_error(E_WARNING, "%s::__toString() must return a string", ZSTR_VAL(ce_exception->name));
} else {
zend_update_property_ex(i_get_exception_base(ex), ex, ZSTR_KNOWN(ZEND_STR_STRING), &tmp);
}
}
zval_ptr_dtor(&tmp);
if (EG(exception)) {
zval zv;
ZVAL_OBJ(&zv, EG(exception));
/* do the best we can to inform about the inner exception */
if (instanceof_function(ce_exception, zend_ce_exception) || instanceof_function(ce_exception, zend_ce_error)) {
file = zval_get_string(GET_PROPERTY_SILENT(&zv, ZEND_STR_FILE));
line = zval_get_long(GET_PROPERTY_SILENT(&zv, ZEND_STR_LINE));
}
zend_error_va(E_WARNING, (file && ZSTR_LEN(file) > 0) ? file : NULL, line,
"Uncaught %s in exception handling during call to %s::__toString()",
ZSTR_VAL(Z_OBJCE(zv)->name), ZSTR_VAL(ce_exception->name));
if (file) {
zend_string_release_ex(file, 0);
}
}
str = zval_get_string(GET_PROPERTY_SILENT(&exception, ZEND_STR_STRING));
file = zval_get_string(GET_PROPERTY_SILENT(&exception, ZEND_STR_FILE));
line = zval_get_long(GET_PROPERTY_SILENT(&exception, ZEND_STR_LINE));
zend_error_va(severity | E_DONT_BAIL,
(file && ZSTR_LEN(file) > 0) ? file : NULL, line,
"Uncaught %S\n thrown", str);
zend_string_release_ex(str, 0);
zend_string_release_ex(file, 0);
} else if (ce_exception == &zend_ce_unwind_exit || ce_exception == &zend_ce_graceful_exit) {
/* We successfully unwound, nothing more to do.
* We still return FAILURE in this case, as further execution should still be aborted. */
} else {
zend_error(severity, "Uncaught exception %s", ZSTR_VAL(ce_exception->name));
}
OBJ_RELEASE(ex);
return result;
}
/* }}} */
ZEND_NORETURN void zend_exception_uncaught_error(const char *format, ...) {
va_list va;
va_start(va, format);
zend_string *prefix = zend_vstrpprintf(0, format, va);
va_end(va);
ZEND_ASSERT(EG(exception));
zval exception_zv;
ZVAL_OBJ_COPY(&exception_zv, EG(exception));
zend_clear_exception();
zend_string *exception_str = zval_get_string(&exception_zv);