v8
4.5.103 (node 4.8.7)
V8 is Google's open source JavaScript engine
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#include <v8.h>
Public Member Functions | |
V8_DEPRECATE_SOON ("Use isolate version", TryCatch()) | |
TryCatch (Isolate *isolate) | |
~TryCatch () | |
bool | HasCaught () const |
bool | CanContinue () const |
bool | HasTerminated () const |
Local< Value > | ReThrow () |
Local< Value > | Exception () const |
V8_DEPRECATE_SOON ("Use maybe version.", Local< Value > StackTrace() const) | |
V8_WARN_UNUSED_RESULT MaybeLocal< Value > | StackTrace (Local< Context > context) const |
Local< v8::Message > | Message () const |
void | Reset () |
void | SetVerbose (bool value) |
void | SetCaptureMessage (bool value) |
Static Public Member Functions | |
static void * | JSStackComparableAddress (v8::TryCatch *handler) |
Friends | |
class | v8::internal::Isolate |
~TryCatch | ( | ) |
Unregisters and deletes this try/catch block.
bool CanContinue | ( | ) | const |
For certain types of exceptions, it makes no sense to continue execution.
If CanContinue returns false, the correct action is to perform any C++ cleanup needed and then return. If CanContinue returns false and HasTerminated returns true, it is possible to call CancelTerminateExecution in order to continue calling into the engine.
Returns the exception caught by this try/catch block. If no exception has been caught an empty handle is returned.
The returned handle is valid until this TryCatch block has been destroyed.
bool HasCaught | ( | ) | const |
Returns true if an exception has been caught by this try/catch block.
bool HasTerminated | ( | ) | const |
Returns true if an exception has been caught due to script execution being terminated.
There is no JavaScript representation of an execution termination exception. Such exceptions are thrown when the TerminateExecution methods are called to terminate a long-running script.
If such an exception has been thrown, HasTerminated will return true, indicating that it is possible to call CancelTerminateExecution in order to continue calling into the engine.
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inlinestatic |
There are cases when the raw address of C++ TryCatch object cannot be used for comparisons with addresses into the JS stack. The cases are: 1) ARM, ARM64 and MIPS simulators which have separate JS stack. 2) Address sanitizer allocates local C++ object in the heap when UseAfterReturn mode is enabled. This method returns address that can be used for comparisons with addresses into the JS stack. When neither simulator nor ASAN's UseAfterReturn is enabled, then the address returned will be the address of the C++ try catch handler itself.
Local<v8::Message> Message | ( | ) | const |
Returns the message associated with this exception. If there is no message associated an empty handle is returned.
The returned handle is valid until this TryCatch block has been destroyed.
void Reset | ( | ) |
Clears any exceptions that may have been caught by this try/catch block. After this method has been called, HasCaught() will return false. Cancels the scheduled exception if it is caught and ReThrow() is not called before.
It is not necessary to clear a try/catch block before using it again; if another exception is thrown the previously caught exception will just be overwritten. However, it is often a good idea since it makes it easier to determine which operation threw a given exception.
void SetCaptureMessage | ( | bool | value | ) |
void SetVerbose | ( | bool | value | ) |
Set verbosity of the external exception handler.
By default, exceptions that are caught by an external exception handler are not reported. Call SetVerbose with true on an external exception handler to have exceptions caught by the handler reported as if they were not caught.
V8_WARN_UNUSED_RESULT MaybeLocal<Value> StackTrace | ( | Local< Context > | context | ) | const |
V8_DEPRECATE_SOON | ( | "Use isolate version" | , |
TryCatch() | |||
) |
V8_DEPRECATE_SOON | ( | "Use maybe version." | , |
Local< Value > StackTrace() const | |||
) |
Returns the .stack property of the thrown object. If no .stack property is present an empty handle is returned.