/*
* Wrap the now-pending exception in a different exception. This is useful
* for reflection stuff that wants to hand a checked exception back from a
* method that doesn't declare it.
*
* If something fails, an (unchecked) exception related to that failure
* will be pending instead.
*/
void dvmWrapException(const char* newExcepStr)
{
Thread* self = dvmThreadSelf();
Object* origExcep;
ClassObject* iteClass;
origExcep = dvmGetException(self);
dvmAddTrackedAlloc(origExcep, self); // don't let the GC free it
dvmClearException(self); // clear before class lookup
iteClass = dvmFindSystemClass(newExcepStr);
if (iteClass != NULL) {
Object* iteExcep;
Method* initMethod;
iteExcep = dvmAllocObject(iteClass, ALLOC_DEFAULT);
if (iteExcep != NULL) {
initMethod = dvmFindDirectMethodByDescriptor(iteClass, "<init>",
"(Ljava/lang/Throwable;)V");
if (initMethod != NULL) {
JValue unused;
dvmCallMethod(self, initMethod, iteExcep, &unused,
origExcep);
/* if <init> succeeded, replace the old exception */
if (!dvmCheckException(self))
dvmSetException(self, iteExcep);
}
dvmReleaseTrackedAlloc(iteExcep, NULL);
/* if initMethod doesn't exist, or failed... */
if (!dvmCheckException(self))
dvmSetException(self, origExcep);
} else {
/* leave OutOfMemoryError pending */
}
} else {
/* leave ClassNotFoundException pending */
}
assert(dvmCheckException(self));
dvmReleaseTrackedAlloc(origExcep, self);
}
/* Throw an OutOfMemoryError if there's a thread to attach it to.
* Avoid recursing.
*
* The caller must not be holding the heap lock, or else the allocations
* in dvmThrowException() will deadlock.
*/
static void throwOOME()
{
Thread *self;
if ((self = dvmThreadSelf()) != NULL) {
/* If the current (failing) dvmMalloc() happened as part of thread
* creation/attachment before the thread became part of the root set,
* we can't rely on the thread-local trackedAlloc table, so
* we can't keep track of a real allocated OOME object. But, since
* the thread is in the process of being created, it won't have
* a useful stack anyway, so we may as well make things easier
* by throwing the (stackless) pre-built OOME.
*/
if (dvmIsOnThreadList(self) && !self->throwingOOME) {
/* Let ourselves know that we tried to throw an OOM
* error in the normal way in case we run out of
* memory trying to allocate it inside dvmThrowException().
*/
self->throwingOOME = true;
/* Don't include a description string;
* one fewer allocation.
*/
dvmThrowOutOfMemoryError(NULL);
} else {
/*
* This thread has already tried to throw an OutOfMemoryError,
* which probably means that we're running out of memory
* while recursively trying to throw.
*
* To avoid any more allocation attempts, "throw" a pre-built
* OutOfMemoryError object (which won't have a useful stack trace).
*
* Note that since this call can't possibly allocate anything,
* we don't care about the state of self->throwingOOME
* (which will usually already be set).
*/
#ifdef FASTIVA
d2f_setPendingException(self, gDvm.outOfMemoryObj, true);
#else
dvmSetException(self, gDvm.outOfMemoryObj);
#endif
}
/* We're done with the possible recursion.
*/
self->throwingOOME = false;
}
}
