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Unwind V8 execution context on fatal error, refs #87

Browse Source 
This is yet a first hack to prove applicability.  Currently
unwind environment is held in a global variable, i.e. solution
is neither thread safe nor reentrant yet.
This commit is contained in:
Stefan Siegl 2014-04-12 00:02:43 +02:00
parent 997b237240
commit a49fa8ce02
3 changed files with 48 additions and 2 deletions
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2
php_v8js_macros.h
View File

@ -205,6 +205,8 @@ struct php_v8js_ctx {
std::vector<php_v8js_accessor_ctx *> accessor_list;
char *tz;
bool fatal_error_abort;
#ifdef ZTS
void ***zts_ctx;
#endif

4
v8js.cc
View File

@ -1134,6 +1134,10 @@ static PHP_METHOD(V8Js, executeString)
php_v8js_timer_pop(TSRMLS_C);
}
if(c->fatal_error_abort) {
zend_error(E_ERROR, "V8Js caught fatal error; message lost, sorry :-)");
}
char exception_string[64];
if (c->time_limit_hit) {

44
v8js_convert.cc
View File

@ -30,6 +30,17 @@ extern "C" {
#include <stdexcept>
#include <limits>
jmp_buf *unwind_env;
static void php_v8js_error_handler(int error_num, const char *error_filename, const uint error_lineno, const char *format, va_list args)
{
longjmp(*unwind_env, 1);
}
static void php_v8js_weak_object_callback(const v8::WeakCallbackData<v8::Object, zval> &data);
/* Callback for PHP methods and functions */
@ -43,6 +54,13 @@ static void php_v8js_call_php_func(zval *value, zend_class_entry *ce, zend_funct
char *error;
int error_len, i, flags = V8JS_FLAG_NONE;
#if PHP_V8_API_VERSION <= 3023008
/* Until V8 3.23.8 Isolate could only take one external pointer. */
php_v8js_ctx *ctx = (php_v8js_ctx *) isolate->GetData();
#else
php_v8js_ctx *ctx = (php_v8js_ctx *) isolate->GetData(0);
#endif
/* Set parameter limits */
min_num_args = method_ptr->common.required_num_args;
max_num_args = method_ptr->common.num_args;
@ -125,12 +143,34 @@ static void php_v8js_call_php_func(zval *value, zend_class_entry *ce, zend_funct
fcc.called_scope = ce;
fcc.object_ptr = value;
/* Call the method */
zend_call_function(&fci, &fcc TSRMLS_CC);
jmp_buf env;
int val;
void (*old_error_handler)(int, const char *, const uint, const char*, va_list);
old_error_handler = zend_error_cb;
zend_error_cb = php_v8js_error_handler;
val = setjmp (env);
unwind_env = &env;
if (val) {
ctx->fatal_error_abort = true;
zend_error_cb = old_error_handler;
}
else {
/* Call the method */
zend_call_function(&fci, &fcc TSRMLS_CC);
}
}
isolate->Enter();
if(ctx->fatal_error_abort) {
v8::V8::TerminateExecution(isolate);
info.GetReturnValue().Set(V8JS_NULL);
return;
}
failure:
/* Cleanup */
if (argc) {