stubdefs.cpp revision cd8f5e701547739f241594b43e9470c92d98e9cf 
1/*
2 * In the C mterp stubs, "goto" is a function call followed immediately
3 * by a return.
4 */
5
6#define GOTO_TARGET_DECL(_target, ...)
7
8#define GOTO_TARGET(_target, ...) _target:
9
10#define GOTO_TARGET_END
11
12/* ugh */
13#define STUB_HACK(x)
14#define JIT_STUB_HACK(x)
15
16/*
17 * InterpSave's pc and fp must be valid when breaking out to a
18 * "Reportxxx" routine.  Because the portable interpreter uses local
19 * variables for these, we must flush prior.  Stubs, however, use
20 * the interpSave vars directly, so this is a nop for stubs.
21 */
22#define PC_FP_TO_SELF()                                                    \
23    self->interpSave.pc = pc;                                              \
24    self->interpSave.fp = fp;
25
26/*
27 * Instruction framing.  For a switch-oriented implementation this is
28 * case/break, for a threaded implementation it's a goto label and an
29 * instruction fetch/computed goto.
30 *
31 * Assumes the existence of "const u2* pc" and (for threaded operation)
32 * "u2 inst".
33 */
34# define H(_op)             &&op_##_op
35# define HANDLE_OPCODE(_op) op_##_op:
36# define FINISH(_offset) {                                                  \
37        ADJUST_PC(_offset);                                                 \
38        inst = FETCH(0);                                                    \
39        if (self->interpBreak.ctl.subMode) {                                \
40            dvmCheckBefore(pc, fp, self);                                   \
41        }                                                                   \
42        goto *handlerTable[INST_INST(inst)];                                \
43    }
44# define FINISH_BKPT(_opcode) {                                             \
45        goto *handlerTable[_opcode];                                        \
46    }
47# define DISPATCH_EXTENDED(_opcode) {                                       \
48        goto *handlerTable[0x100 + _opcode];                                \
49    }
50
51#define OP_END
52
53/*
54 * The "goto" targets just turn into goto statements.  The "arguments" are
55 * passed through local variables.
56 */
57
58#define GOTO_exceptionThrown() goto exceptionThrown;
59
60#define GOTO_returnFromMethod() goto returnFromMethod;
61
62#define GOTO_invoke(_target, _methodCallRange, _jumboFormat)                \
63    do {                                                                    \
64        methodCallRange = _methodCallRange;                                 \
65        jumboFormat = _jumboFormat;                                         \
66        goto _target;                                                       \
67    } while(false)
68
69/* for this, the "args" are already in the locals */
70#define GOTO_invokeMethod(_methodCallRange, _methodToCall, _vsrc1, _vdst) goto invokeMethod;
71
72#define GOTO_bail() goto bail;
73
74/*
75 * Periodically check for thread suspension.
76 *
77 * While we're at it, see if a debugger has attached or the profiler has
78 * started.  If so, switch to a different "goto" table.
79 */
80#define PERIODIC_CHECKS(_pcadj) {                              \
81        if (dvmCheckSuspendQuick(self)) {                                   \
82            EXPORT_PC();  /* need for precise GC */                         \
83            dvmCheckSuspendPending(self);                                   \
84        }                                                                   \
85    }
86