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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Exception handling.
*/
#ifndef _DALVIK_EXCEPTION
#define _DALVIK_EXCEPTION
/* initialization */
bool dvmExceptionStartup(void);
void dvmExceptionShutdown(void);
/*
* Throw an exception in the current thread, by class descriptor.
*/
void dvmThrowChainedException(const char* exceptionDescriptor, const char* msg,
Object* cause);
INLINE void dvmThrowException(const char* exceptionDescriptor,
const char* msg)
{
dvmThrowChainedException(exceptionDescriptor, msg, NULL);
}
/*
* Like dvmThrowChainedException, but takes printf-style args for the message.
*/
void dvmThrowExceptionFmtV(const char* exceptionDescriptor, const char* fmt,
va_list args);
void dvmThrowExceptionFmt(const char* exceptionDescriptor, const char* fmt, ...)
#if defined(__GNUC__)
__attribute__ ((format(printf, 2, 3)))
#endif
;
INLINE void dvmThrowExceptionFmt(const char* exceptionDescriptor,
const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
dvmThrowExceptionFmtV(exceptionDescriptor, fmt, args);
va_end(args);
}
/*
* Throw an exception in the current thread, by class object.
*/
void dvmThrowChainedExceptionByClass(ClassObject* exceptionClass,
const char* msg, Object* cause);
INLINE void dvmThrowExceptionByClass(ClassObject* exceptionClass,
const char* msg)
{
dvmThrowChainedExceptionByClass(exceptionClass, msg, NULL);
}
/*
* Throw the named exception using the name of a class as the exception
* message.
*/
void dvmThrowChainedExceptionWithClassMessage(const char* exceptionDescriptor,
const char* messageDescriptor, Object* cause);
INLINE void dvmThrowExceptionWithClassMessage(const char* exceptionDescriptor,
const char* messageDescriptor)
{
dvmThrowChainedExceptionWithClassMessage(exceptionDescriptor,
messageDescriptor, NULL);
}
/*
* Like dvmThrowExceptionWithMessageFromDescriptor, but take a
* class object instead of a name.
*/
void dvmThrowExceptionByClassWithClassMessage(ClassObject* exceptionClass,
const char* messageDescriptor);
/*
* Return the exception being thrown in the current thread, or NULL if
* no exception is pending.
*/
INLINE Object* dvmGetException(Thread* self) {
return self->exception;
}
/*
* Set the exception being thrown in the current thread.
*/
INLINE void dvmSetException(Thread* self, Object* exception)
{
assert(exception != NULL);
self->exception = exception;
}
/*
* Clear the pending exception.
*
* (We use this rather than "set(null)" because we may need to have special
* fixups here for StackOverflowError stuff. Calling "clear" in the code
* makes it obvious.)
*/
INLINE void dvmClearException(Thread* self) {
self->exception = NULL;
}
/*
* Clear the pending exception. Used by the optimization and verification
* code, which has to run with "initializing" set to avoid going into a
* death-spin if the "class not found" exception can't be found.
*/
void dvmClearOptException(Thread* self);
/*
* Returns "true" if an exception is pending. Use this if you have a
* "self" pointer.
*/
INLINE bool dvmCheckException(Thread* self) {
return (self->exception != NULL);
}
/*
* Returns "true" if this is a "checked" exception, i.e. it's a subclass
* of Throwable (assumed) but not a subclass of RuntimeException or Error.
*/
bool dvmIsCheckedException(const Object* exception);
/*
* Wrap the now-pending exception in a different exception.
*
* If something fails, an (unchecked) exception related to that failure
* will be pending instead.
*/
void dvmWrapException(const char* newExcepStr);
/*
* Get the "cause" field from an exception.
*
* Returns NULL if the field is null or uninitialized.
*/
Object* dvmGetExceptionCause(const Object* exception);
/*
* Print the exception stack trace on stderr. Calls the exception's
* print function.
*/
void dvmPrintExceptionStackTrace(void);
/*
* Print the exception stack trace to the log file. The exception stack
* trace is computed within the VM.
*/
void dvmLogExceptionStackTrace(void);
/*
* Search for a catch block that matches "exception".
*
* "*newFrame" gets a copy of the new frame pointer.
*
* If "doUnroll" is set, we unroll "thread"s stack as we go (and update
* self->curFrame with the same value as in *newFrame).
*
* Returns the offset to the catch code on success, or -1 if we couldn't
* find a catcher.
*/
int dvmFindCatchBlock(Thread* self, int relPc, Object* exception,
bool doUnroll, void** newFrame);
/*
* Support for saving exception stack traces and converting them to
* usable form. Use the "FillIn" function to generate a compact array
* that represents the stack frames, then "GetStackTrace" to convert it
* to an array of StackTraceElement objects.
*
* Don't call the "Internal" form of the function directly.
*/
void* dvmFillInStackTraceInternal(Thread* thread, bool wantObject, int* pCount);
/* return an [I for use by interpreted code */
INLINE Object* dvmFillInStackTrace(Thread* thread) {
return (Object*) dvmFillInStackTraceInternal(thread, true, NULL);
}
ArrayObject* dvmGetStackTrace(const Object* stackState);
/* return an int* and array count; caller must free() the return value */
INLINE int* dvmFillInStackTraceRaw(Thread* thread, int* pCount) {
return (int*) dvmFillInStackTraceInternal(thread, false, pCount);
}
ArrayObject* dvmGetStackTraceRaw(const int* intVals, int stackDepth);
/*
* Print a formatted version of a raw stack trace to the log file.
*/
void dvmLogRawStackTrace(const int* intVals, int stackDepth);
#endif /*_DALVIK_EXCEPTION*/
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