blob: f51abe882aa650da0c8b315d0b0107bea3537abe [file] [log] [blame]
/*
* C footer. This has some common code shared by the various targets.
*/
/*
* Everything from here on is a "goto target". In the basic interpreter
* we jump into these targets and then jump directly to the handler for
* next instruction. Here, these are subroutines that return to the caller.
*/
GOTO_TARGET(filledNewArray, bool methodCallRange, bool jumboFormat)
{
ClassObject* arrayClass;
ArrayObject* newArray;
u4* contents;
char typeCh;
int i;
u4 arg5;
EXPORT_PC();
if (jumboFormat) {
ref = FETCH(1) | (u4)FETCH(2) << 16; /* class ref */
vsrc1 = FETCH(3); /* #of elements */
vdst = FETCH(4); /* range base */
arg5 = -1; /* silence compiler warning */
ILOGV("|filled-new-array/jumbo args=%d @0x%08x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
} else {
ref = FETCH(1); /* class ref */
vdst = FETCH(2); /* first 4 regs -or- range base */
if (methodCallRange) {
vsrc1 = INST_AA(inst); /* #of elements */
arg5 = -1; /* silence compiler warning */
ILOGV("|filled-new-array-range args=%d @0x%04x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
} else {
arg5 = INST_A(inst);
vsrc1 = INST_B(inst); /* #of elements */
ILOGV("|filled-new-array args=%d @0x%04x {regs=0x%04x %x}",
vsrc1, ref, vdst, arg5);
}
}
/*
* Resolve the array class.
*/
arrayClass = dvmDexGetResolvedClass(methodClassDex, ref);
if (arrayClass == NULL) {
arrayClass = dvmResolveClass(curMethod->clazz, ref, false);
if (arrayClass == NULL)
GOTO_exceptionThrown();
}
/*
if (!dvmIsArrayClass(arrayClass)) {
dvmThrowRuntimeException(
"filled-new-array needs array class");
GOTO_exceptionThrown();
}
*/
/* verifier guarantees this is an array class */
assert(dvmIsArrayClass(arrayClass));
assert(dvmIsClassInitialized(arrayClass));
/*
* Create an array of the specified type.
*/
LOGVV("+++ filled-new-array type is '%s'", arrayClass->descriptor);
typeCh = arrayClass->descriptor[1];
if (typeCh == 'D' || typeCh == 'J') {
/* category 2 primitives not allowed */
dvmThrowRuntimeException("bad filled array req");
GOTO_exceptionThrown();
} else if (typeCh != 'L' && typeCh != '[' && typeCh != 'I') {
/* TODO: requires multiple "fill in" loops with different widths */
LOGE("non-int primitives not implemented");
dvmThrowInternalError(
"filled-new-array not implemented for anything but 'int'");
GOTO_exceptionThrown();
}
newArray = dvmAllocArrayByClass(arrayClass, vsrc1, ALLOC_DONT_TRACK);
if (newArray == NULL)
GOTO_exceptionThrown();
/*
* Fill in the elements. It's legal for vsrc1 to be zero.
*/
contents = (u4*)(void*)newArray->contents;
if (methodCallRange) {
for (i = 0; i < vsrc1; i++)
contents[i] = GET_REGISTER(vdst+i);
} else {
assert(vsrc1 <= 5);
if (vsrc1 == 5) {
contents[4] = GET_REGISTER(arg5);
vsrc1--;
}
for (i = 0; i < vsrc1; i++) {
contents[i] = GET_REGISTER(vdst & 0x0f);
vdst >>= 4;
}
}
if (typeCh == 'L' || typeCh == '[') {
dvmWriteBarrierArray(newArray, 0, newArray->length);
}
retval.l = (Object*)newArray;
}
if (jumboFormat) {
FINISH(5);
} else {
FINISH(3);
}
GOTO_TARGET_END
GOTO_TARGET(invokeVirtual, bool methodCallRange, bool jumboFormat)
{
Method* baseMethod;
Object* thisPtr;
EXPORT_PC();
if (jumboFormat) {
ref = FETCH(1) | (u4)FETCH(2) << 16; /* method ref */
vsrc1 = FETCH(3); /* count */
vdst = FETCH(4); /* first reg */
ADJUST_PC(2); /* advance pc partially to make returns easier */
ILOGV("|invoke-virtual/jumbo args=%d @0x%08x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisPtr = (Object*) GET_REGISTER(vdst);
} else {
vsrc1 = INST_AA(inst); /* AA (count) or BA (count + arg 5) */
ref = FETCH(1); /* method ref */
vdst = FETCH(2); /* 4 regs -or- first reg */
/*
* The object against which we are executing a method is always
* in the first argument.
*/
if (methodCallRange) {
assert(vsrc1 > 0);
ILOGV("|invoke-virtual-range args=%d @0x%04x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisPtr = (Object*) GET_REGISTER(vdst);
} else {
assert((vsrc1>>4) > 0);
ILOGV("|invoke-virtual args=%d @0x%04x {regs=0x%04x %x}",
vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
thisPtr = (Object*) GET_REGISTER(vdst & 0x0f);
}
}
if (!checkForNull(thisPtr))
GOTO_exceptionThrown();
/*
* Resolve the method. This is the correct method for the static
* type of the object. We also verify access permissions here.
*/
baseMethod = dvmDexGetResolvedMethod(methodClassDex, ref);
if (baseMethod == NULL) {
baseMethod = dvmResolveMethod(curMethod->clazz, ref,METHOD_VIRTUAL);
if (baseMethod == NULL) {
ILOGV("+ unknown method or access denied");
GOTO_exceptionThrown();
}
}
/*
* Combine the object we found with the vtable offset in the
* method.
*/
assert(baseMethod->methodIndex < thisPtr->clazz->vtableCount);
methodToCall = thisPtr->clazz->vtable[baseMethod->methodIndex];
#if defined(WITH_JIT) && defined(MTERP_STUB)
self->methodToCall = methodToCall;
self->callsiteClass = thisPtr->clazz;
#endif
#if 0
if (dvmIsAbstractMethod(methodToCall)) {
/*
* This can happen if you create two classes, Base and Sub, where
* Sub is a sub-class of Base. Declare a protected abstract
* method foo() in Base, and invoke foo() from a method in Base.
* Base is an "abstract base class" and is never instantiated
* directly. Now, Override foo() in Sub, and use Sub. This
* Works fine unless Sub stops providing an implementation of
* the method.
*/
dvmThrowAbstractMethodError("abstract method not implemented");
GOTO_exceptionThrown();
}
#else
assert(!dvmIsAbstractMethod(methodToCall) ||
methodToCall->nativeFunc != NULL);
#endif
LOGVV("+++ base=%s.%s virtual[%d]=%s.%s",
baseMethod->clazz->descriptor, baseMethod->name,
(u4) baseMethod->methodIndex,
methodToCall->clazz->descriptor, methodToCall->name);
assert(methodToCall != NULL);
#if 0
if (vsrc1 != methodToCall->insSize) {
LOGW("WRONG METHOD: base=%s.%s virtual[%d]=%s.%s",
baseMethod->clazz->descriptor, baseMethod->name,
(u4) baseMethod->methodIndex,
methodToCall->clazz->descriptor, methodToCall->name);
//dvmDumpClass(baseMethod->clazz);
//dvmDumpClass(methodToCall->clazz);
dvmDumpAllClasses(0);
}
#endif
GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
}
GOTO_TARGET_END
GOTO_TARGET(invokeSuper, bool methodCallRange, bool jumboFormat)
{
Method* baseMethod;
u2 thisReg;
EXPORT_PC();
if (jumboFormat) {
ref = FETCH(1) | (u4)FETCH(2) << 16; /* method ref */
vsrc1 = FETCH(3); /* count */
vdst = FETCH(4); /* first reg */
ADJUST_PC(2); /* advance pc partially to make returns easier */
ILOGV("|invoke-super/jumbo args=%d @0x%08x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisReg = vdst;
} else {
vsrc1 = INST_AA(inst); /* AA (count) or BA (count + arg 5) */
ref = FETCH(1); /* method ref */
vdst = FETCH(2); /* 4 regs -or- first reg */
if (methodCallRange) {
ILOGV("|invoke-super-range args=%d @0x%04x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisReg = vdst;
} else {
ILOGV("|invoke-super args=%d @0x%04x {regs=0x%04x %x}",
vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
thisReg = vdst & 0x0f;
}
}
/* impossible in well-formed code, but we must check nevertheless */
if (!checkForNull((Object*) GET_REGISTER(thisReg)))
GOTO_exceptionThrown();
/*
* Resolve the method. This is the correct method for the static
* type of the object. We also verify access permissions here.
* The first arg to dvmResolveMethod() is just the referring class
* (used for class loaders and such), so we don't want to pass
* the superclass into the resolution call.
*/
baseMethod = dvmDexGetResolvedMethod(methodClassDex, ref);
if (baseMethod == NULL) {
baseMethod = dvmResolveMethod(curMethod->clazz, ref,METHOD_VIRTUAL);
if (baseMethod == NULL) {
ILOGV("+ unknown method or access denied");
GOTO_exceptionThrown();
}
}
/*
* Combine the object we found with the vtable offset in the
* method's class.
*
* We're using the current method's class' superclass, not the
* superclass of "this". This is because we might be executing
* in a method inherited from a superclass, and we want to run
* in that class' superclass.
*/
if (baseMethod->methodIndex >= curMethod->clazz->super->vtableCount) {
/*
* Method does not exist in the superclass. Could happen if
* superclass gets updated.
*/
dvmThrowNoSuchMethodError(baseMethod->name);
GOTO_exceptionThrown();
}
methodToCall = curMethod->clazz->super->vtable[baseMethod->methodIndex];
#if 0
if (dvmIsAbstractMethod(methodToCall)) {
dvmThrowAbstractMethodError("abstract method not implemented");
GOTO_exceptionThrown();
}
#else
assert(!dvmIsAbstractMethod(methodToCall) ||
methodToCall->nativeFunc != NULL);
#endif
LOGVV("+++ base=%s.%s super-virtual=%s.%s",
baseMethod->clazz->descriptor, baseMethod->name,
methodToCall->clazz->descriptor, methodToCall->name);
assert(methodToCall != NULL);
GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
}
GOTO_TARGET_END
GOTO_TARGET(invokeInterface, bool methodCallRange, bool jumboFormat)
{
Object* thisPtr;
ClassObject* thisClass;
EXPORT_PC();
if (jumboFormat) {
ref = FETCH(1) | (u4)FETCH(2) << 16; /* method ref */
vsrc1 = FETCH(3); /* count */
vdst = FETCH(4); /* first reg */
ADJUST_PC(2); /* advance pc partially to make returns easier */
ILOGV("|invoke-interface/jumbo args=%d @0x%08x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisPtr = (Object*) GET_REGISTER(vdst);
} else {
vsrc1 = INST_AA(inst); /* AA (count) or BA (count + arg 5) */
ref = FETCH(1); /* method ref */
vdst = FETCH(2); /* 4 regs -or- first reg */
/*
* The object against which we are executing a method is always
* in the first argument.
*/
if (methodCallRange) {
assert(vsrc1 > 0);
ILOGV("|invoke-interface-range args=%d @0x%04x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisPtr = (Object*) GET_REGISTER(vdst);
} else {
assert((vsrc1>>4) > 0);
ILOGV("|invoke-interface args=%d @0x%04x {regs=0x%04x %x}",
vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
thisPtr = (Object*) GET_REGISTER(vdst & 0x0f);
}
}
if (!checkForNull(thisPtr))
GOTO_exceptionThrown();
thisClass = thisPtr->clazz;
/*
* Given a class and a method index, find the Method* with the
* actual code we want to execute.
*/
methodToCall = dvmFindInterfaceMethodInCache(thisClass, ref, curMethod,
methodClassDex);
#if defined(WITH_JIT) && defined(MTERP_STUB)
self->callsiteClass = thisClass;
self->methodToCall = methodToCall;
#endif
if (methodToCall == NULL) {
assert(dvmCheckException(self));
GOTO_exceptionThrown();
}
GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
}
GOTO_TARGET_END
GOTO_TARGET(invokeDirect, bool methodCallRange, bool jumboFormat)
{
u2 thisReg;
EXPORT_PC();
if (jumboFormat) {
ref = FETCH(1) | (u4)FETCH(2) << 16; /* method ref */
vsrc1 = FETCH(3); /* count */
vdst = FETCH(4); /* first reg */
ADJUST_PC(2); /* advance pc partially to make returns easier */
ILOGV("|invoke-direct/jumbo args=%d @0x%08x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisReg = vdst;
} else {
vsrc1 = INST_AA(inst); /* AA (count) or BA (count + arg 5) */
ref = FETCH(1); /* method ref */
vdst = FETCH(2); /* 4 regs -or- first reg */
if (methodCallRange) {
ILOGV("|invoke-direct-range args=%d @0x%04x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisReg = vdst;
} else {
ILOGV("|invoke-direct args=%d @0x%04x {regs=0x%04x %x}",
vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
thisReg = vdst & 0x0f;
}
}
if (!checkForNull((Object*) GET_REGISTER(thisReg)))
GOTO_exceptionThrown();
methodToCall = dvmDexGetResolvedMethod(methodClassDex, ref);
if (methodToCall == NULL) {
methodToCall = dvmResolveMethod(curMethod->clazz, ref,
METHOD_DIRECT);
if (methodToCall == NULL) {
ILOGV("+ unknown direct method"); // should be impossible
GOTO_exceptionThrown();
}
}
GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
}
GOTO_TARGET_END
GOTO_TARGET(invokeStatic, bool methodCallRange, bool jumboFormat)
EXPORT_PC();
if (jumboFormat) {
ref = FETCH(1) | (u4)FETCH(2) << 16; /* method ref */
vsrc1 = FETCH(3); /* count */
vdst = FETCH(4); /* first reg */
ADJUST_PC(2); /* advance pc partially to make returns easier */
ILOGV("|invoke-static/jumbo args=%d @0x%08x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
} else {
vsrc1 = INST_AA(inst); /* AA (count) or BA (count + arg 5) */
ref = FETCH(1); /* method ref */
vdst = FETCH(2); /* 4 regs -or- first reg */
if (methodCallRange)
ILOGV("|invoke-static-range args=%d @0x%04x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
else
ILOGV("|invoke-static args=%d @0x%04x {regs=0x%04x %x}",
vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
}
methodToCall = dvmDexGetResolvedMethod(methodClassDex, ref);
if (methodToCall == NULL) {
methodToCall = dvmResolveMethod(curMethod->clazz, ref, METHOD_STATIC);
if (methodToCall == NULL) {
ILOGV("+ unknown method");
GOTO_exceptionThrown();
}
#if defined(WITH_JIT) && defined(MTERP_STUB)
/*
* The JIT needs dvmDexGetResolvedMethod() to return non-null.
* Include the check if this code is being used as a stub
* called from the assembly interpreter.
*/
if ((self->interpBreak.ctl.subMode & kSubModeJitTraceBuild) &&
(dvmDexGetResolvedMethod(methodClassDex, ref) == NULL)) {
/* Class initialization is still ongoing */
dvmJitEndTraceSelect(self,pc);
}
#endif
}
GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
GOTO_TARGET_END
GOTO_TARGET(invokeVirtualQuick, bool methodCallRange, bool jumboFormat)
{
Object* thisPtr;
EXPORT_PC();
vsrc1 = INST_AA(inst); /* AA (count) or BA (count + arg 5) */
ref = FETCH(1); /* vtable index */
vdst = FETCH(2); /* 4 regs -or- first reg */
/*
* The object against which we are executing a method is always
* in the first argument.
*/
if (methodCallRange) {
assert(vsrc1 > 0);
ILOGV("|invoke-virtual-quick-range args=%d @0x%04x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisPtr = (Object*) GET_REGISTER(vdst);
} else {
assert((vsrc1>>4) > 0);
ILOGV("|invoke-virtual-quick args=%d @0x%04x {regs=0x%04x %x}",
vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
thisPtr = (Object*) GET_REGISTER(vdst & 0x0f);
}
if (!checkForNull(thisPtr))
GOTO_exceptionThrown();
/*
* Combine the object we found with the vtable offset in the
* method.
*/
assert(ref < (unsigned int) thisPtr->clazz->vtableCount);
methodToCall = thisPtr->clazz->vtable[ref];
#if defined(WITH_JIT) && defined(MTERP_STUB)
self->callsiteClass = thisPtr->clazz;
self->methodToCall = methodToCall;
#endif
#if 0
if (dvmIsAbstractMethod(methodToCall)) {
dvmThrowAbstractMethodError("abstract method not implemented");
GOTO_exceptionThrown();
}
#else
assert(!dvmIsAbstractMethod(methodToCall) ||
methodToCall->nativeFunc != NULL);
#endif
LOGVV("+++ virtual[%d]=%s.%s",
ref, methodToCall->clazz->descriptor, methodToCall->name);
assert(methodToCall != NULL);
GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
}
GOTO_TARGET_END
GOTO_TARGET(invokeSuperQuick, bool methodCallRange, bool jumboFormat)
{
u2 thisReg;
EXPORT_PC();
vsrc1 = INST_AA(inst); /* AA (count) or BA (count + arg 5) */
ref = FETCH(1); /* vtable index */
vdst = FETCH(2); /* 4 regs -or- first reg */
if (methodCallRange) {
ILOGV("|invoke-super-quick-range args=%d @0x%04x {regs=v%d-v%d}",
vsrc1, ref, vdst, vdst+vsrc1-1);
thisReg = vdst;
} else {
ILOGV("|invoke-super-quick args=%d @0x%04x {regs=0x%04x %x}",
vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
thisReg = vdst & 0x0f;
}
/* impossible in well-formed code, but we must check nevertheless */
if (!checkForNull((Object*) GET_REGISTER(thisReg)))
GOTO_exceptionThrown();
#if 0 /* impossible in optimized + verified code */
if (ref >= curMethod->clazz->super->vtableCount) {
dvmThrowNoSuchMethodError(NULL);
GOTO_exceptionThrown();
}
#else
assert(ref < (unsigned int) curMethod->clazz->super->vtableCount);
#endif
/*
* Combine the object we found with the vtable offset in the
* method's class.
*
* We're using the current method's class' superclass, not the
* superclass of "this". This is because we might be executing
* in a method inherited from a superclass, and we want to run
* in the method's class' superclass.
*/
methodToCall = curMethod->clazz->super->vtable[ref];
#if 0
if (dvmIsAbstractMethod(methodToCall)) {
dvmThrowAbstractMethodError("abstract method not implemented");
GOTO_exceptionThrown();
}
#else
assert(!dvmIsAbstractMethod(methodToCall) ||
methodToCall->nativeFunc != NULL);
#endif
LOGVV("+++ super-virtual[%d]=%s.%s",
ref, methodToCall->clazz->descriptor, methodToCall->name);
assert(methodToCall != NULL);
GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
}
GOTO_TARGET_END
/*
* General handling for return-void, return, and return-wide. Put the
* return value in "retval" before jumping here.
*/
GOTO_TARGET(returnFromMethod)
{
StackSaveArea* saveArea;
/*
* We must do this BEFORE we pop the previous stack frame off, so
* that the GC can see the return value (if any) in the local vars.
*
* Since this is now an interpreter switch point, we must do it before
* we do anything at all.
*/
PERIODIC_CHECKS(0);
ILOGV("> retval=0x%llx (leaving %s.%s %s)",
retval.j, curMethod->clazz->descriptor, curMethod->name,
curMethod->shorty);
//DUMP_REGS(curMethod, fp);
saveArea = SAVEAREA_FROM_FP(fp);
#ifdef EASY_GDB
debugSaveArea = saveArea;
#endif
/* back up to previous frame and see if we hit a break */
fp = (u4*)saveArea->prevFrame;
assert(fp != NULL);
/* Handle any special subMode requirements */
if (self->interpBreak.ctl.subMode != 0) {
PC_FP_TO_SELF();
dvmReportReturn(self);
}
if (dvmIsBreakFrame(fp)) {
/* bail without popping the method frame from stack */
LOGVV("+++ returned into break frame");
GOTO_bail();
}
/* update thread FP, and reset local variables */
self->interpSave.curFrame = fp;
curMethod = SAVEAREA_FROM_FP(fp)->method;
self->interpSave.method = curMethod;
//methodClass = curMethod->clazz;
methodClassDex = curMethod->clazz->pDvmDex;
pc = saveArea->savedPc;
ILOGD("> (return to %s.%s %s)", curMethod->clazz->descriptor,
curMethod->name, curMethod->shorty);
/* use FINISH on the caller's invoke instruction */
//u2 invokeInstr = INST_INST(FETCH(0));
if (true /*invokeInstr >= OP_INVOKE_VIRTUAL &&
invokeInstr <= OP_INVOKE_INTERFACE*/)
{
FINISH(3);
} else {
//LOGE("Unknown invoke instr %02x at %d",
// invokeInstr, (int) (pc - curMethod->insns));
assert(false);
}
}
GOTO_TARGET_END
/*
* Jump here when the code throws an exception.
*
* By the time we get here, the Throwable has been created and the stack
* trace has been saved off.
*/
GOTO_TARGET(exceptionThrown)
{
Object* exception;
int catchRelPc;
PERIODIC_CHECKS(0);
/*
* We save off the exception and clear the exception status. While
* processing the exception we might need to load some Throwable
* classes, and we don't want class loader exceptions to get
* confused with this one.
*/
assert(dvmCheckException(self));
exception = dvmGetException(self);
dvmAddTrackedAlloc(exception, self);
dvmClearException(self);
LOGV("Handling exception %s at %s:%d",
exception->clazz->descriptor, curMethod->name,
dvmLineNumFromPC(curMethod, pc - curMethod->insns));
/*
* Report the exception throw to any "subMode" watchers.
*
* TODO: if the exception was thrown by interpreted code, control
* fell through native, and then back to us, we will report the
* exception at the point of the throw and again here. We can avoid
* this by not reporting exceptions when we jump here directly from
* the native call code above, but then we won't report exceptions
* that were thrown *from* the JNI code (as opposed to *through* it).
*
* The correct solution is probably to ignore from-native exceptions
* here, and have the JNI exception code do the reporting to the
* debugger.
*/
if (self->interpBreak.ctl.subMode != 0) {
PC_FP_TO_SELF();
dvmReportExceptionThrow(self, exception);
}
/*
* We need to unroll to the catch block or the nearest "break"
* frame.
*
* A break frame could indicate that we have reached an intermediate
* native call, or have gone off the top of the stack and the thread
* needs to exit. Either way, we return from here, leaving the
* exception raised.
*
* If we do find a catch block, we want to transfer execution to
* that point.
*
* Note this can cause an exception while resolving classes in
* the "catch" blocks.
*/
catchRelPc = dvmFindCatchBlock(self, pc - curMethod->insns,
exception, false, (void**)(void*)&fp);
/*
* Restore the stack bounds after an overflow. This isn't going to
* be correct in all circumstances, e.g. if JNI code devours the
* exception this won't happen until some other exception gets
* thrown. If the code keeps pushing the stack bounds we'll end
* up aborting the VM.
*
* Note we want to do this *after* the call to dvmFindCatchBlock,
* because that may need extra stack space to resolve exception
* classes (e.g. through a class loader).
*
* It's possible for the stack overflow handling to cause an
* exception (specifically, class resolution in a "catch" block
* during the call above), so we could see the thread's overflow
* flag raised but actually be running in a "nested" interpreter
* frame. We don't allow doubled-up StackOverflowErrors, so
* we can check for this by just looking at the exception type
* in the cleanup function. Also, we won't unroll past the SOE
* point because the more-recent exception will hit a break frame
* as it unrolls to here.
*/
if (self->stackOverflowed)
dvmCleanupStackOverflow(self, exception);
if (catchRelPc < 0) {
/* falling through to JNI code or off the bottom of the stack */
#if DVM_SHOW_EXCEPTION >= 2
LOGD("Exception %s from %s:%d not caught locally",
exception->clazz->descriptor, dvmGetMethodSourceFile(curMethod),
dvmLineNumFromPC(curMethod, pc - curMethod->insns));
#endif
dvmSetException(self, exception);
dvmReleaseTrackedAlloc(exception, self);
GOTO_bail();
}
#if DVM_SHOW_EXCEPTION >= 3
{
const Method* catchMethod = SAVEAREA_FROM_FP(fp)->method;
LOGD("Exception %s thrown from %s:%d to %s:%d",
exception->clazz->descriptor, dvmGetMethodSourceFile(curMethod),
dvmLineNumFromPC(curMethod, pc - curMethod->insns),
dvmGetMethodSourceFile(catchMethod),
dvmLineNumFromPC(catchMethod, catchRelPc));
}
#endif
/*
* Adjust local variables to match self->interpSave.curFrame and the
* updated PC.
*/
//fp = (u4*) self->interpSave.curFrame;
curMethod = SAVEAREA_FROM_FP(fp)->method;
self->interpSave.method = curMethod;
//methodClass = curMethod->clazz;
methodClassDex = curMethod->clazz->pDvmDex;
pc = curMethod->insns + catchRelPc;
ILOGV("> pc <-- %s.%s %s", curMethod->clazz->descriptor,
curMethod->name, curMethod->shorty);
DUMP_REGS(curMethod, fp, false); // show all regs
/*
* Restore the exception if the handler wants it.
*
* The Dalvik spec mandates that, if an exception handler wants to
* do something with the exception, the first instruction executed
* must be "move-exception". We can pass the exception along
* through the thread struct, and let the move-exception instruction
* clear it for us.
*
* If the handler doesn't call move-exception, we don't want to
* finish here with an exception still pending.
*/
if (INST_INST(FETCH(0)) == OP_MOVE_EXCEPTION)
dvmSetException(self, exception);
dvmReleaseTrackedAlloc(exception, self);
FINISH(0);
}
GOTO_TARGET_END
/*
* General handling for invoke-{virtual,super,direct,static,interface},
* including "quick" variants.
*
* Set "methodToCall" to the Method we're calling, and "methodCallRange"
* depending on whether this is a "/range" instruction.
*
* For a range call:
* "vsrc1" holds the argument count (8 bits)
* "vdst" holds the first argument in the range
* For a non-range call:
* "vsrc1" holds the argument count (4 bits) and the 5th argument index
* "vdst" holds four 4-bit register indices
*
* The caller must EXPORT_PC before jumping here, because any method
* call can throw a stack overflow exception.
*/
GOTO_TARGET(invokeMethod, bool methodCallRange, const Method* _methodToCall,
u2 count, u2 regs)
{
STUB_HACK(vsrc1 = count; vdst = regs; methodToCall = _methodToCall;);
//printf("range=%d call=%p count=%d regs=0x%04x\n",
// methodCallRange, methodToCall, count, regs);
//printf(" --> %s.%s %s\n", methodToCall->clazz->descriptor,
// methodToCall->name, methodToCall->shorty);
u4* outs;
int i;
/*
* Copy args. This may corrupt vsrc1/vdst.
*/
if (methodCallRange) {
// could use memcpy or a "Duff's device"; most functions have
// so few args it won't matter much
assert(vsrc1 <= curMethod->outsSize);
assert(vsrc1 == methodToCall->insSize);
outs = OUTS_FROM_FP(fp, vsrc1);
for (i = 0; i < vsrc1; i++)
outs[i] = GET_REGISTER(vdst+i);
} else {
u4 count = vsrc1 >> 4;
assert(count <= curMethod->outsSize);
assert(count == methodToCall->insSize);
assert(count <= 5);
outs = OUTS_FROM_FP(fp, count);
#if 0
if (count == 5) {
outs[4] = GET_REGISTER(vsrc1 & 0x0f);
count--;
}
for (i = 0; i < (int) count; i++) {
outs[i] = GET_REGISTER(vdst & 0x0f);
vdst >>= 4;
}
#else
// This version executes fewer instructions but is larger
// overall. Seems to be a teensy bit faster.
assert((vdst >> 16) == 0); // 16 bits -or- high 16 bits clear
switch (count) {
case 5:
outs[4] = GET_REGISTER(vsrc1 & 0x0f);
case 4:
outs[3] = GET_REGISTER(vdst >> 12);
case 3:
outs[2] = GET_REGISTER((vdst & 0x0f00) >> 8);
case 2:
outs[1] = GET_REGISTER((vdst & 0x00f0) >> 4);
case 1:
outs[0] = GET_REGISTER(vdst & 0x0f);
default:
;
}
#endif
}
}
/*
* (This was originally a "goto" target; I've kept it separate from the
* stuff above in case we want to refactor things again.)
*
* At this point, we have the arguments stored in the "outs" area of
* the current method's stack frame, and the method to call in
* "methodToCall". Push a new stack frame.
*/
{
StackSaveArea* newSaveArea;
u4* newFp;
ILOGV("> %s%s.%s %s",
dvmIsNativeMethod(methodToCall) ? "(NATIVE) " : "",
methodToCall->clazz->descriptor, methodToCall->name,
methodToCall->shorty);
newFp = (u4*) SAVEAREA_FROM_FP(fp) - methodToCall->registersSize;
newSaveArea = SAVEAREA_FROM_FP(newFp);
/* verify that we have enough space */
if (true) {
u1* bottom;
bottom = (u1*) newSaveArea - methodToCall->outsSize * sizeof(u4);
if (bottom < self->interpStackEnd) {
/* stack overflow */
LOGV("Stack overflow on method call (start=%p end=%p newBot=%p(%d) size=%d '%s')",
self->interpStackStart, self->interpStackEnd, bottom,
(u1*) fp - bottom, self->interpStackSize,
methodToCall->name);
dvmHandleStackOverflow(self, methodToCall);
assert(dvmCheckException(self));
GOTO_exceptionThrown();
}
//LOGD("+++ fp=%p newFp=%p newSave=%p bottom=%p",
// fp, newFp, newSaveArea, bottom);
}
#ifdef LOG_INSTR
if (methodToCall->registersSize > methodToCall->insSize) {
/*
* This makes valgrind quiet when we print registers that
* haven't been initialized. Turn it off when the debug
* messages are disabled -- we want valgrind to report any
* used-before-initialized issues.
*/
memset(newFp, 0xcc,
(methodToCall->registersSize - methodToCall->insSize) * 4);
}
#endif
#ifdef EASY_GDB
newSaveArea->prevSave = SAVEAREA_FROM_FP(fp);
#endif
newSaveArea->prevFrame = fp;
newSaveArea->savedPc = pc;
#if defined(WITH_JIT) && defined(MTERP_STUB)
newSaveArea->returnAddr = 0;
#endif
newSaveArea->method = methodToCall;
if (self->interpBreak.ctl.subMode != 0) {
/*
* We mark ENTER here for both native and non-native
* calls. For native calls, we'll mark EXIT on return.
* For non-native calls, EXIT is marked in the RETURN op.
*/
PC_TO_SELF();
dvmReportInvoke(self, methodToCall);
}
if (!dvmIsNativeMethod(methodToCall)) {
/*
* "Call" interpreted code. Reposition the PC, update the
* frame pointer and other local state, and continue.
*/
curMethod = methodToCall;
self->interpSave.method = curMethod;
methodClassDex = curMethod->clazz->pDvmDex;
pc = methodToCall->insns;
self->interpSave.curFrame = newFp;
fp = newFp;
#ifdef EASY_GDB
debugSaveArea = SAVEAREA_FROM_FP(newFp);
#endif
self->debugIsMethodEntry = true; // profiling, debugging
ILOGD("> pc <-- %s.%s %s", curMethod->clazz->descriptor,
curMethod->name, curMethod->shorty);
DUMP_REGS(curMethod, fp, true); // show input args
FINISH(0); // jump to method start
} else {
/* set this up for JNI locals, even if not a JNI native */
newSaveArea->xtra.localRefCookie = self->jniLocalRefTable.segmentState.all;
self->interpSave.curFrame = newFp;
DUMP_REGS(methodToCall, newFp, true); // show input args
if (self->interpBreak.ctl.subMode != 0) {
dvmReportPreNativeInvoke(methodToCall, self, fp);
}
ILOGD("> native <-- %s.%s %s", methodToCall->clazz->descriptor,
methodToCall->name, methodToCall->shorty);
/*
* Jump through native call bridge. Because we leave no
* space for locals on native calls, "newFp" points directly
* to the method arguments.
*/
(*methodToCall->nativeFunc)(newFp, &retval, methodToCall, self);
if (self->interpBreak.ctl.subMode != 0) {
dvmReportPostNativeInvoke(methodToCall, self, fp);
}
/* pop frame off */
dvmPopJniLocals(self, newSaveArea);
self->interpSave.curFrame = fp;
/*
* If the native code threw an exception, or interpreted code
* invoked by the native call threw one and nobody has cleared
* it, jump to our local exception handling.
*/
if (dvmCheckException(self)) {
LOGV("Exception thrown by/below native code");
GOTO_exceptionThrown();
}
ILOGD("> retval=0x%llx (leaving native)", retval.j);
ILOGD("> (return from native %s.%s to %s.%s %s)",
methodToCall->clazz->descriptor, methodToCall->name,
curMethod->clazz->descriptor, curMethod->name,
curMethod->shorty);
//u2 invokeInstr = INST_INST(FETCH(0));
if (true /*invokeInstr >= OP_INVOKE_VIRTUAL &&
invokeInstr <= OP_INVOKE_INTERFACE*/)
{
FINISH(3);
} else {
//LOGE("Unknown invoke instr %02x at %d",
// invokeInstr, (int) (pc - curMethod->insns));
assert(false);
}
}
}
assert(false); // should not get here
GOTO_TARGET_END