entry.cpp revision ab35b50311951feea3782151dd5422ee944685c2 
1/*
2 * Main interpreter loop.
3 *
4 * This was written with an ARM implementation in mind.
5 */
6void dvmInterpretPortable(Thread* self)
7{
8#if defined(EASY_GDB)
9    StackSaveArea* debugSaveArea = SAVEAREA_FROM_FP(self->interpSave.curFrame);
10#endif
11    DvmDex* methodClassDex;     // curMethod->clazz->pDvmDex
12    JValue retval;
13
14    /* core state */
15    const Method* curMethod;    // method we're interpreting
16    const u2* pc;               // program counter
17    u4* fp;                     // frame pointer
18    u2 inst;                    // current instruction
19    /* instruction decoding */
20    u4 ref;                     // 16 or 32-bit quantity fetched directly
21    u2 vsrc1, vsrc2, vdst;      // usually used for register indexes
22    /* method call setup */
23    const Method* methodToCall;
24    bool methodCallRange;
25
26    /* static computed goto table */
27    DEFINE_GOTO_TABLE(handlerTable);
28
29    /* copy state in */
30    curMethod = self->interpSave.method;
31    pc = self->interpSave.pc;
32    fp = self->interpSave.curFrame;
33    retval = self->interpSave.retval;   /* only need for kInterpEntryReturn? */
34
35    methodClassDex = curMethod->clazz->pDvmDex;
36
37    LOGVV("threadid=%d: %s.%s pc=%#x fp=%p",
38        self->threadId, curMethod->clazz->descriptor, curMethod->name,
39        pc - curMethod->insns, fp);
40
41    /*
42     * Handle any ongoing profiling and prep for debugging.
43     */
44    if (self->interpBreak.ctl.subMode != 0) {
45        TRACE_METHOD_ENTER(self, curMethod);
46        self->debugIsMethodEntry = true;   // Always true on startup
47    }
48    /*
49     * DEBUG: scramble this to ensure we're not relying on it.
50     */
51    methodToCall = (const Method*) -1;
52
53#if 0
54    if (self->debugIsMethodEntry) {
55        ILOGD("|-- Now interpreting %s.%s", curMethod->clazz->descriptor,
56                curMethod->name);
57        DUMP_REGS(curMethod, self->interpSave.curFrame, false);
58    }
59#endif
60
61    FINISH(0);                  /* fetch and execute first instruction */
62
63/*--- start of opcodes ---*/
64