1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 /*
18 * Mterp entry point and support functions.
19 */
20 #include "Dalvik.h"
21 #include "mterp/Mterp.h"
22
23 #include <stddef.h>
24
25
26 /*
27 * Verify some constants used by the mterp interpreter.
28 */
dvmCheckAsmConstants()29 bool dvmCheckAsmConstants()
30 {
31 bool failed = false;
32
33 #ifndef DVM_NO_ASM_INTERP
34
35 #ifndef DVM_JMP_TABLE_MTERP
36 extern void* dvmAsmInstructionStart[];
37 extern void* dvmAsmInstructionEnd[];
38 #endif
39
40 #define ASM_DEF_VERIFY
41 #include "mterp/common/asm-constants.h"
42
43 if (failed) {
44 ALOGE("Please correct the values in mterp/common/asm-constants.h");
45 dvmAbort();
46 }
47
48 #ifndef DVM_JMP_TABLE_MTERP
49 /*
50 * If we're using computed goto instruction transitions, make sure
51 * none of the handlers overflows the 64-byte limit. This won't tell
52 * which one did, but if any one is too big the total size will
53 * overflow.
54 */
55 #if defined(__mips__)
56 const int width = 128;
57 #else
58 const int width = 64;
59 #endif
60 int interpSize = (uintptr_t) dvmAsmInstructionEnd -
61 (uintptr_t) dvmAsmInstructionStart;
62 if (interpSize != 0 && interpSize != kNumPackedOpcodes*width) {
63 ALOGE("ERROR: unexpected asm interp size %d", interpSize);
64 ALOGE("(did an instruction handler exceed %d bytes?)", width);
65 dvmAbort();
66 }
67 #endif
68
69 #endif // ndef DVM_NO_ASM_INTERP
70
71 return !failed;
72 }
73
74
75 /*
76 * "Mterp entry point.
77 */
dvmMterpStd(Thread * self)78 void dvmMterpStd(Thread* self)
79 {
80 /* configure mterp items */
81 self->interpSave.methodClassDex = self->interpSave.method->clazz->pDvmDex;
82
83 IF_LOGVV() {
84 char* desc = dexProtoCopyMethodDescriptor(
85 &self->interpSave.method->prototype);
86 LOGVV("mterp threadid=%d : %s.%s %s",
87 dvmThreadSelf()->threadId,
88 self->interpSave.method->clazz->descriptor,
89 self->interpSave.method->name,
90 desc);
91 free(desc);
92 }
93 //ALOGI("self is %p, pc=%p, fp=%p", self, self->interpSave.pc,
94 // self->interpSave.curFrame);
95 //ALOGI("first instruction is 0x%04x", self->interpSave.pc[0]);
96
97 /*
98 * Handle any ongoing profiling and prep for debugging
99 */
100 if (self->interpBreak.ctl.subMode != 0) {
101 TRACE_METHOD_ENTER(self, self->interpSave.method);
102 self->debugIsMethodEntry = true; // Always true on startup
103 }
104
105 dvmMterpStdRun(self);
106
107 #ifdef LOG_INSTR
108 ALOGD("|-- Leaving interpreter loop");
109 #endif
110 }
111