GOTO_TARGET_END
GOTO_TARGET(invokeDirect, bool methodCallRange)
{
u2 thisReg;
vsrc1 = INST_AA(inst); /* AA (count) or BA (count + arg 5) */
ref = FETCH(1); /* method ref */
vdst = FETCH(2); /* 4 regs -or- first reg */
EXPORT_PC();
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\n"); // should be impossible
GOTO_exceptionThrown();
}
}
GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
}
GOTO_TARGET_END
GOTO_TARGET(invokeInterface, bool methodCallRange)
{
Object* thisPtr;
ClassObject* thisClass;
EXPORT_PC();
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);
}
/*
* Check to see if "obj" is NULL. If so, export the PC into the stack
* frame and throw an exception.
*
* Perform additional checks on debug builds.
*
* Use this to check for NULL when the instruction handler doesn't do
* anything else that can throw an exception.
*/
static inline bool checkForNullExportPC(Object* obj, u4* fp, const u2* pc)
{
if (obj == NULL) {
EXPORT_PC();
dvmThrowNullPointerException(NULL);
return false;
}
#ifdef WITH_EXTRA_OBJECT_VALIDATION
if (!dvmIsHeapAddress(obj)) {
ALOGE("Invalid object %p", obj);
dvmAbort();
}
#endif
#ifndef NDEBUG
if (obj->clazz == NULL || ((u4) obj->clazz) <= 65536) {
/* probable heap corruption */
ALOGE("Invalid object class %p (in %p)", obj->clazz, obj);
dvmAbort();
}
#endif
return true;
}
GOTO_TARGET_END
GOTO_TARGET(invokeSuper, bool methodCallRange)
{
Method* baseMethod;
u2 thisReg;
EXPORT_PC();
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\n");
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.
*/
dvmThrowException("Ljava/lang/NoSuchMethodError;",
baseMethod->name);
GOTO_exceptionThrown();
}
methodToCall = curMethod->clazz->super->vtable[baseMethod->methodIndex];
#if 0
if (dvmIsAbstractMethod(methodToCall)) {
dvmThrowException("Ljava/lang/AbstractMethodError;",
"abstract method not implemented");
GOTO_exceptionThrown();
}
#else
assert(!dvmIsAbstractMethod(methodToCall) ||
methodToCall->nativeFunc != NULL);
#endif
LOGVV("+++ base=%s.%s super-virtual=%s.%s\n",
baseMethod->clazz->descriptor, baseMethod->name,
methodToCall->clazz->descriptor, methodToCall->name);
assert(methodToCall != NULL);
GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
}
GOTO_TARGET_END
GOTO_TARGET(invokeVirtual, bool methodCallRange)
{
Method* baseMethod;
Object* thisPtr;
EXPORT_PC();
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\n");
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 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.
*/
dvmThrowException("Ljava/lang/AbstractMethodError;",
"abstract method not implemented");
GOTO_exceptionThrown();
}
#else
assert(!dvmIsAbstractMethod(methodToCall) ||
methodToCall->nativeFunc != NULL);
#endif
LOGVV("+++ base=%s.%s virtual[%d]=%s.%s\n",
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\n",
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(filledNewArray, bool methodCallRange)
{
ClassObject* arrayClass;
ArrayObject* newArray;
u4* contents;
char typeCh;
int i;
u4 arg5;
EXPORT_PC();
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)) {
dvmThrowException("Ljava/lang/RuntimeError;",
"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'\n", arrayClass->descriptor);
typeCh = arrayClass->descriptor[1];
if (typeCh == 'D' || typeCh == 'J') {
/* category 2 primitives not allowed */
dvmThrowException("Ljava/lang/RuntimeError;",
"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\n");
dvmThrowException("Ljava/lang/InternalError;",
"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*) 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;
}
}
retval.l = newArray;
}
/*
* Update the debugger on interesting events, such as hitting a breakpoint
* or a single-step point. This is called from the top of the interpreter
* loop, before the current instruction is processed.
*
* Set "methodEntry" if we've just entered the method. This detects
* method exit by checking to see if the next instruction is "return".
*
* This can't catch native method entry/exit, so we have to handle that
* at the point of invocation. We also need to catch it in dvmCallMethod
* if we want to capture native->native calls made through JNI.
*
* Notes to self:
* - Don't want to switch to VMWAIT while posting events to the debugger.
* Let the debugger code decide if we need to change state.
* - We may want to check for debugger-induced thread suspensions on
* every instruction. That would make a "suspend all" more responsive
* and reduce the chances of multiple simultaneous events occurring.
* However, it could change the behavior some.
*
* TODO: method entry/exit events are probably less common than location
* breakpoints. We may be able to speed things up a bit if we don't query
* the event list unless we know there's at least one lurking within.
*/
static void updateDebugger(const Method* method, const u2* pc, const u4* fp,
bool methodEntry, Thread* self)
{
int eventFlags = 0;
/*
* Update xtra.currentPc on every instruction. We need to do this if
* there's a chance that we could get suspended. This can happen if
* eventFlags != 0 here, or somebody manually requests a suspend
* (which gets handled at PERIOD_CHECKS time). One place where this
* needs to be correct is in dvmAddSingleStep().
*/
EXPORT_PC();
if (methodEntry)
eventFlags |= DBG_METHOD_ENTRY;
/*
* See if we have a breakpoint here.
*
* Depending on the "mods" associated with event(s) on this address,
* we may or may not actually send a message to the debugger.
*/
#ifdef WITH_DEBUGGER
if (INST_INST(*pc) == OP_BREAKPOINT) {
LOGV("+++ breakpoint hit at %p\n", pc);
eventFlags |= DBG_BREAKPOINT;
}
#endif
/*
* If the debugger is single-stepping one of our threads, check to
* see if we're that thread and we've reached a step point.
*/
const StepControl* pCtrl = &gDvm.stepControl;
if (pCtrl->active && pCtrl->thread == self) {
int line, frameDepth;
bool doStop = false;
const char* msg = NULL;
assert(!dvmIsNativeMethod(method));
if (pCtrl->depth == SD_INTO) {
/*
* Step into method calls. We break when the line number
* or method pointer changes. If we're in SS_MIN mode, we
* always stop.
*/
if (pCtrl->method != method) {
doStop = true;
msg = "new method";
} else if (pCtrl->size == SS_MIN) {
doStop = true;
msg = "new instruction";
} else if (!dvmAddressSetGet(
pCtrl->pAddressSet, pc - method->insns)) {
doStop = true;
msg = "new line";
}
} else if (pCtrl->depth == SD_OVER) {
/*
* Step over method calls. We break when the line number is
* different and the frame depth is <= the original frame
* depth. (We can't just compare on the method, because we
* might get unrolled past it by an exception, and it's tricky
* to identify recursion.)
*/
frameDepth = dvmComputeVagueFrameDepth(self, fp);
if (frameDepth < pCtrl->frameDepth) {
/* popped up one or more frames, always trigger */
doStop = true;
msg = "method pop";
} else if (frameDepth == pCtrl->frameDepth) {
/* same depth, see if we moved */
if (pCtrl->size == SS_MIN) {
doStop = true;
msg = "new instruction";
} else if (!dvmAddressSetGet(pCtrl->pAddressSet,
pc - method->insns)) {
doStop = true;
msg = "new line";
}
}
} else {
assert(pCtrl->depth == SD_OUT);
/*
* Return from the current method. We break when the frame
* depth pops up.
*
* This differs from the "method exit" break in that it stops
* with the PC at the next instruction in the returned-to
* function, rather than the end of the returning function.
*/
frameDepth = dvmComputeVagueFrameDepth(self, fp);
if (frameDepth < pCtrl->frameDepth) {
doStop = true;
msg = "method pop";
}
}
if (doStop) {
LOGV("#####S %s\n", msg);
eventFlags |= DBG_SINGLE_STEP;
}
}
/*
* Check to see if this is a "return" instruction. JDWP says we should
* send the event *after* the code has been executed, but it also says
* the location we provide is the last instruction. Since the "return"
* instruction has no interesting side effects, we should be safe.
* (We can't just move this down to the returnFromMethod label because
* we potentially need to combine it with other events.)
*
* We're also not supposed to generate a method exit event if the method
* terminates "with a thrown exception".
*/
u2 inst = INST_INST(FETCH(0));
if (inst == OP_RETURN_VOID || inst == OP_RETURN || inst == OP_RETURN_WIDE ||
inst == OP_RETURN_OBJECT)
{
eventFlags |= DBG_METHOD_EXIT;
}
/*
* If there's something interesting going on, see if it matches one
* of the debugger filters.
*/
if (eventFlags != 0) {
Object* thisPtr = dvmGetThisPtr(method, fp);
if (thisPtr != NULL && !dvmIsValidObject(thisPtr)) {
/*
* TODO: remove this check if we're confident that the "this"
* pointer is where it should be -- slows us down, especially
* during single-step.
*/
char* desc = dexProtoCopyMethodDescriptor(&method->prototype);
LOGE("HEY: invalid 'this' ptr %p (%s.%s %s)\n", thisPtr,
method->clazz->descriptor, method->name, desc);
free(desc);
dvmAbort();
}
dvmDbgPostLocationEvent(method, pc - method->insns, thisPtr,
eventFlags);
}
}
