2 * Copyright (C) 2008 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 * Dalvik bytecode verification subroutines.
20 #ifndef _DALVIK_VERIFYSUBS
21 #define _DALVIK_VERIFYSUBS
24 * InsnFlags is a 32-bit integer with the following layout:
25 * 0-15 instruction length (or 0 if this address doesn't hold an opcode)
26 * 16 opcode flag (indicating this address holds an opcode)
27 * 17 try block (indicating exceptions thrown here may be caught locally)
28 * 30 visited (verifier has examined this instruction at least once)
29 * 31 changed (set/cleared as bytecode verifier runs)
33 #define kInsnFlagWidthMask 0x0000ffff
34 #define kInsnFlagInTry (1 << 16)
35 #define kInsnFlagBranchTarget (1 << 17)
36 #define kInsnFlagGcPoint (1 << 18)
37 #define kInsnFlagVisited (1 << 30)
38 #define kInsnFlagChanged (1 << 31)
40 /* add opcode widths to InsnFlags */
41 bool dvmComputeCodeWidths(const Method* meth, InsnFlags* insnFlags,
42 int* pNewInstanceCount);
44 /* set the "in try" flag for sections of code wrapped with a "try" block */
45 bool dvmSetTryFlags(const Method* meth, InsnFlags* insnFlags);
47 /* check switch targets and set the "branch target" flag for destinations */
48 bool dvmCheckSwitchTargets(const Method* meth, InsnFlags* insnFlags,
51 /* verify branch target and set "branch target" flag on the destination */
52 bool dvmCheckBranchTarget(const Method* meth, InsnFlags* insnFlags,
53 int curOffset, bool selfOkay);
55 /* verification failure reporting */
56 #define LOG_VFY(...) dvmLogVerifyFailure(NULL, __VA_ARGS__)
57 #define LOG_VFY_METH(_meth, ...) dvmLogVerifyFailure(_meth, __VA_ARGS__)
59 /* log verification failure with optional method info */
60 void dvmLogVerifyFailure(const Method* meth, const char* format, ...)
62 __attribute__ ((format(printf, 2, 3)))
66 /* log verification failure due to resolution trouble */
67 void dvmLogUnableToResolveClass(const char* missingClassDescr,
70 /* extract the relative branch target from a branch instruction */
71 bool dvmGetBranchTarget(const Method* meth, InsnFlags* insnFlags,
72 int curOffset, int* pOffset, bool* pConditional);
74 /* return a RegType enumeration value that "value" just fits into */
75 char dvmDetermineCat1Const(s4 value);
77 #endif /*_DALVIK_VERIFYSUBS*/