/*
* Main interpreter loop.
*
* This was written with an ARM implementation in mind.
*/
void dvmInterpretPortable(Thread* self)
{
#if defined(EASY_GDB)
StackSaveArea* debugSaveArea = SAVEAREA_FROM_FP(self->interpSave.curFrame);
#endif
DvmDex* methodClassDex; // curMethod->clazz->pDvmDex
JValue retval;
/* core state */
const Method* curMethod; // method we're interpreting
const u2* pc; // program counter
u4* fp; // frame pointer
u2 inst; // current instruction
/* instruction decoding */
u4 ref; // 16 or 32-bit quantity fetched directly
u2 vsrc1, vsrc2, vdst; // usually used for register indexes
/* method call setup */
const Method* methodToCall;
bool methodCallRange;
/* static computed goto table */
DEFINE_GOTO_TABLE(handlerTable);
/* copy state in */
curMethod = self->interpSave.method;
pc = self->interpSave.pc;
fp = self->interpSave.curFrame;
retval = self->interpSave.retval; /* only need for kInterpEntryReturn? */
methodClassDex = curMethod->clazz->pDvmDex;
LOGVV("threadid=%d: %s.%s pc=%#x fp=%p",
self->threadId, curMethod->clazz->descriptor, curMethod->name,
pc - curMethod->insns, fp);
/*
* Handle any ongoing profiling and prep for debugging.
*/
if (self->interpBreak.ctl.subMode != 0) {
TRACE_METHOD_ENTER(self, curMethod);
self->debugIsMethodEntry = true; // Always true on startup
}
/*
* DEBUG: scramble this to ensure we're not relying on it.
*/
methodToCall = (const Method*) -1;
#if 0
if (self->debugIsMethodEntry) {
ILOGD("|-- Now interpreting %s.%s", curMethod->clazz->descriptor,
curMethod->name);
DUMP_REGS(curMethod, self->interpSave.curFrame, false);
}
#endif
FINISH(0); /* fetch and execute first instruction */
/*
* Main interpreter loop.
*
* This was written with an ARM implementation in mind.
*/
bool INTERP_FUNC_NAME(Thread* self, InterpState* interpState)
{
#if defined(EASY_GDB)
StackSaveArea* debugSaveArea = SAVEAREA_FROM_FP(self->curFrame);
#endif
#if INTERP_TYPE == INTERP_DBG
bool debugIsMethodEntry = interpState->debugIsMethodEntry;
#endif
#if defined(WITH_TRACKREF_CHECKS)
int debugTrackedRefStart = interpState->debugTrackedRefStart;
#endif
DvmDex* methodClassDex; // curMethod->clazz->pDvmDex
JValue retval;
/* core state */
const Method* curMethod; // method we're interpreting
const u2* pc; // program counter
u4* fp; // frame pointer
u2 inst; // current instruction
/* instruction decoding */
u2 ref; // 16-bit quantity fetched directly
u2 vsrc1, vsrc2, vdst; // usually used for register indexes
/* method call setup */
const Method* methodToCall;
bool methodCallRange;
#if defined(THREADED_INTERP)
/* static computed goto table */
DEFINE_GOTO_TABLE(handlerTable);
#endif
#if defined(WITH_JIT)
#if 0
LOGD("*DebugInterp - entrypoint is %d, tgt is 0x%x, %s\n",
interpState->entryPoint,
interpState->pc,
interpState->method->name);
#endif
#if INTERP_TYPE == INTERP_DBG
/* Check to see if we've got a trace selection request. */
if (
/*
* Only perform dvmJitCheckTraceRequest if the entry point is
* EntryInstr and the jit state is either kJitTSelectRequest or
* kJitTSelectRequestHot. If debugger/profiler happens to be attached,
* dvmJitCheckTraceRequest will change the jitState to kJitDone but
* but stay in the dbg interpreter.
*/
(interpState->entryPoint == kInterpEntryInstr) &&
(interpState->jitState == kJitTSelectRequest ||
interpState->jitState == kJitTSelectRequestHot) &&
dvmJitCheckTraceRequest(self, interpState)) {
interpState->nextMode = INTERP_STD;
//LOGD("Invalid trace request, exiting\n");
return true;
}
#endif /* INTERP_TYPE == INTERP_DBG */
#endif /* WITH_JIT */
/* copy state in */
curMethod = interpState->method;
pc = interpState->pc;
fp = interpState->fp;
retval = interpState->retval; /* only need for kInterpEntryReturn? */
methodClassDex = curMethod->clazz->pDvmDex;
LOGVV("threadid=%d: entry(%s) %s.%s pc=0x%x fp=%p ep=%d\n",
self->threadId, (interpState->nextMode == INTERP_STD) ? "STD" : "DBG",
curMethod->clazz->descriptor, curMethod->name, pc - curMethod->insns,
fp, interpState->entryPoint);
/*
* DEBUG: scramble this to ensure we're not relying on it.
*/
methodToCall = (const Method*) -1;
#if INTERP_TYPE == INTERP_DBG
if (debugIsMethodEntry) {
ILOGD("|-- Now interpreting %s.%s", curMethod->clazz->descriptor,
curMethod->name);
DUMP_REGS(curMethod, interpState->fp, false);
}
#endif
switch (interpState->entryPoint) {
case kInterpEntryInstr:
/* just fall through to instruction loop or threaded kickstart */
break;
case kInterpEntryReturn:
CHECK_JIT();
goto returnFromMethod;
case kInterpEntryThrow:
goto exceptionThrown;
default:
dvmAbort();
}
#ifdef THREADED_INTERP
FINISH(0); /* fetch and execute first instruction */
#else
while (1) {
CHECK_DEBUG_AND_PROF(); /* service debugger and profiling */
CHECK_TRACKED_REFS(); /* check local reference tracking */
/* fetch the next 16 bits from the instruction stream */
inst = FETCH(0);
switch (INST_INST(inst)) {
/*
* Main interpreter loop.
*
* This was written with an ARM implementation in mind.
* portable���͵Ľ������Ľ���ѭ�����
*/
void dvmInterpretPortable(Thread* self)
{
#if defined(EASY_GDB)
// ��������Ƿ�����ԣ�������ջ֡�ĵ�ַ
StackSaveArea* debugSaveArea = SAVEAREA_FROM_FP(self->interpSave.curFrame);
#endif
DvmDex* methodClassDex; // curMethod->clazz->pDvmDex
JValue retval;
/* core state */
const Method* curMethod; // method we're interpreting ��ǰ����Ҫ���͵ķ���
const u2* pc; // program counter ���������
u4* fp; // frame pointer ָ֡��
u2 inst; // current instruction ��ǰָ��
/* instruction decoding */
u4 ref; // 16 or 32-bit quantity fetched directly
u2 vsrc1, vsrc2, vdst; // usually used for register indexes
/* method call setup */
const Method* methodToCall;
bool methodCallRange;
/*
* static computed goto table
* ��̬����õ���ת��
* ʵ���Ͼ��Ƕ���õ�һ�����
* �þ�̬��ת����libdex��dexopcode.h�ж���
* [��Ҫע����壺�ñ�ֻ�ṩ����cʵ�ֵĽ�������ʹ��]
* ������������
* static const void* handlerTable[0x100] = { \
* H(OP_NOP), \
* H(OP_MOVE), \
* ....
* }
* ���������opcode-gen������߶�̬���ɵģ�����˵�����������ʲô�����ɵģ���Ҫ�ο��ù��ߵ�ʵ��
*
* # define H(_op) &&op_##_op
* ʵ�����������������&&op_OP_NOP �����ĵ�ַ
*/
DEFINE_GOTO_TABLE(handlerTable);
/* copy state in
* ��ʼ��һЩ״ֵ̬
*/
curMethod = self->interpSave.method;
pc = self->interpSave.pc;
fp = self->interpSave.curFrame;
retval = self->interpSave.retval; /* only need for kInterpEntryReturn? */
methodClassDex = curMethod->clazz->pDvmDex; //��ȡdex��ص�����(������Ҫ�ο�vm\DvmDex.cpp��������ʵ��)
LOGVV("threadid=%d: %s.%s pc=%#x fp=%p",
self->threadId, curMethod->clazz->descriptor, curMethod->name,
pc - curMethod->insns, fp);
/*
* Handle any ongoing profiling and prep for debugging.
* ������Ҫ�Ƿ�����ԣ�����������һ�����巽���Ľ���
*/
if (self->interpBreak.ctl.subMode != 0) {
TRACE_METHOD_ENTER(self, curMethod);
self->debugIsMethodEntry = true; // Always true on startup
}
/*
* DEBUG: scramble this to ensure we're not relying on it.
*/
methodToCall = (const Method*) -1;
#if 0
if (self->debugIsMethodEntry) {
ILOGD("|-- Now interpreting %s.%s", curMethod->clazz->descriptor,
curMethod->name);
DUMP_REGS(curMethod, self->interpSave.curFrame, false);
}
#endif
//�����￪ʼ����ȡָ�ִ�У����صĽ�
// ������ʵ���Ͻ�����һ��do - while��ѭ����ֱ��ִ����Ϸ���
FINISH(0); /* fetch and execute first instruction */
