Ejemplo n.º 1
0
static void preloadDexCachesStatsFilled(DexCacheStats* filled) {
    if (!kPreloadDexCachesCollectStats) {
        return;
    }
    for (ClassPathEntry* cpe = gDvm.bootClassPath; cpe->kind != kCpeLastEntry; cpe++) {
        DvmDex* pDvmDex = getDvmDexFromClassPathEntry(cpe);
        const DexHeader* pHeader = pDvmDex->pHeader;
        for (size_t i = 0; i < pHeader->stringIdsSize; i++) {
            StringObject* string = dvmDexGetResolvedString(pDvmDex, i);
            if (string != NULL) {
                filled->numStrings++;
            }
        }
        for (size_t i = 0; i < pHeader->typeIdsSize; i++) {
            ClassObject* clazz = dvmDexGetResolvedClass(pDvmDex, i);
            if (clazz != NULL) {
                filled->numTypes++;
            }
        }
        for (size_t i = 0; i < pHeader->fieldIdsSize; i++) {
            Field* field = dvmDexGetResolvedField(pDvmDex, i);
            if (field != NULL) {
                filled->numFields++;
            }
        }
        for (size_t i = 0; i < pHeader->methodIdsSize; i++) {
            Method* method = dvmDexGetResolvedMethod(pDvmDex, i);
            if (method != NULL) {
                filled->numMethods++;
            }
        }
    }
}
Ejemplo n.º 2
0
GOTO_TARGET_END

GOTO_TARGET(invokeDirect, bool methodCallRange)
    {
        u2 thisReg;

        vsrc1 = INST_AA(inst);      /* AA (count) or BA (count + arg 5) */
        ref = FETCH(1);             /* method ref */
        vdst = FETCH(2);            /* 4 regs -or- first reg */

        EXPORT_PC();

        if (methodCallRange) {
            ILOGV("|invoke-direct-range args=%d @0x%04x {regs=v%d-v%d}",
                vsrc1, ref, vdst, vdst+vsrc1-1);
            thisReg = vdst;
        } else {
            ILOGV("|invoke-direct args=%d @0x%04x {regs=0x%04x %x}",
                vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
            thisReg = vdst & 0x0f;
        }
        if (!checkForNull((Object*) GET_REGISTER(thisReg)))
            GOTO_exceptionThrown();

        methodToCall = dvmDexGetResolvedMethod(methodClassDex, ref);
        if (methodToCall == NULL) {
            methodToCall = dvmResolveMethod(curMethod->clazz, ref,
                            METHOD_DIRECT);
            if (methodToCall == NULL) {
                ILOGV("+ unknown direct method\n");     // should be impossible
                GOTO_exceptionThrown();
            }
        }
        GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
    }
Ejemplo n.º 3
0
// Based on dvmResolveMethod.
static void preloadDexCachesResolveMethod(DvmDex* pDvmDex,
                                          uint32_t methodIdx,
                                          MethodType methodType) {
    Method* method = dvmDexGetResolvedMethod(pDvmDex, methodIdx);
    if (method != NULL) {
        return;
    }
    const DexFile* pDexFile = pDvmDex->pDexFile;
    const DexMethodId* pMethodId = dexGetMethodId(pDexFile, methodIdx);
    ClassObject* clazz = dvmDexGetResolvedClass(pDvmDex, pMethodId->classIdx);
    if (clazz == NULL) {
        return;
    }
    // Skip static methods for uninitialized classes because a filled
    // cache entry implies the class is initialized.
    if ((methodType == METHOD_STATIC) && !dvmIsClassInitialized(clazz)) {
        return;
    }
    const char* methodName = dexStringById(pDexFile, pMethodId->nameIdx);
    DexProto proto;
    dexProtoSetFromMethodId(&proto, pDexFile, pMethodId);

    if (methodType == METHOD_DIRECT) {
        method = dvmFindDirectMethod(clazz, methodName, &proto);
    } else if (methodType == METHOD_STATIC) {
        method = dvmFindDirectMethodHier(clazz, methodName, &proto);
    } else {
        method = dvmFindVirtualMethodHier(clazz, methodName, &proto);
    }
    if (method == NULL) {
        return;
    }
    // ALOGI("VMRuntime.preloadDexCaches found method %s.%s",
    //        clazz->descriptor, methodName);
    dvmDexSetResolvedMethod(pDvmDex, methodIdx, method);
}
Ejemplo n.º 4
0
GOTO_TARGET_END

GOTO_TARGET(invokeSuper, bool methodCallRange)
    {
        Method* baseMethod;
        u2 thisReg;

        EXPORT_PC();

        vsrc1 = INST_AA(inst);      /* AA (count) or BA (count + arg 5) */
        ref = FETCH(1);             /* method ref */
        vdst = FETCH(2);            /* 4 regs -or- first reg */

        if (methodCallRange) {
            ILOGV("|invoke-super-range args=%d @0x%04x {regs=v%d-v%d}",
                vsrc1, ref, vdst, vdst+vsrc1-1);
            thisReg = vdst;
        } else {
            ILOGV("|invoke-super args=%d @0x%04x {regs=0x%04x %x}",
                vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
            thisReg = vdst & 0x0f;
        }
        /* impossible in well-formed code, but we must check nevertheless */
        if (!checkForNull((Object*) GET_REGISTER(thisReg)))
            GOTO_exceptionThrown();

        /*
         * Resolve the method.  This is the correct method for the static
         * type of the object.  We also verify access permissions here.
         * The first arg to dvmResolveMethod() is just the referring class
         * (used for class loaders and such), so we don't want to pass
         * the superclass into the resolution call.
         */
        baseMethod = dvmDexGetResolvedMethod(methodClassDex, ref);
        if (baseMethod == NULL) {
            baseMethod = dvmResolveMethod(curMethod->clazz, ref,METHOD_VIRTUAL);
            if (baseMethod == NULL) {
                ILOGV("+ unknown method or access denied\n");
                GOTO_exceptionThrown();
            }
        }

        /*
         * Combine the object we found with the vtable offset in the
         * method's class.
         *
         * We're using the current method's class' superclass, not the
         * superclass of "this".  This is because we might be executing
         * in a method inherited from a superclass, and we want to run
         * in that class' superclass.
         */
        if (baseMethod->methodIndex >= curMethod->clazz->super->vtableCount) {
            /*
             * Method does not exist in the superclass.  Could happen if
             * superclass gets updated.
             */
            dvmThrowException("Ljava/lang/NoSuchMethodError;",
                baseMethod->name);
            GOTO_exceptionThrown();
        }
        methodToCall = curMethod->clazz->super->vtable[baseMethod->methodIndex];
#if 0
        if (dvmIsAbstractMethod(methodToCall)) {
            dvmThrowException("Ljava/lang/AbstractMethodError;",
                "abstract method not implemented");
            GOTO_exceptionThrown();
        }
#else
        assert(!dvmIsAbstractMethod(methodToCall) ||
            methodToCall->nativeFunc != NULL);
#endif
        LOGVV("+++ base=%s.%s super-virtual=%s.%s\n",
            baseMethod->clazz->descriptor, baseMethod->name,
            methodToCall->clazz->descriptor, methodToCall->name);
        assert(methodToCall != NULL);

        GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
    }
Ejemplo n.º 5
0
GOTO_TARGET_END


GOTO_TARGET(invokeVirtual, bool methodCallRange)
    {
        Method* baseMethod;
        Object* thisPtr;

        EXPORT_PC();

        vsrc1 = INST_AA(inst);      /* AA (count) or BA (count + arg 5) */
        ref = FETCH(1);             /* method ref */
        vdst = FETCH(2);            /* 4 regs -or- first reg */

        /*
         * The object against which we are executing a method is always
         * in the first argument.
         */
        if (methodCallRange) {
            assert(vsrc1 > 0);
            ILOGV("|invoke-virtual-range args=%d @0x%04x {regs=v%d-v%d}",
                vsrc1, ref, vdst, vdst+vsrc1-1);
            thisPtr = (Object*) GET_REGISTER(vdst);
        } else {
            assert((vsrc1>>4) > 0);
            ILOGV("|invoke-virtual args=%d @0x%04x {regs=0x%04x %x}",
                vsrc1 >> 4, ref, vdst, vsrc1 & 0x0f);
            thisPtr = (Object*) GET_REGISTER(vdst & 0x0f);
        }

        if (!checkForNull(thisPtr))
            GOTO_exceptionThrown();

        /*
         * Resolve the method.  This is the correct method for the static
         * type of the object.  We also verify access permissions here.
         */
        baseMethod = dvmDexGetResolvedMethod(methodClassDex, ref);
        if (baseMethod == NULL) {
            baseMethod = dvmResolveMethod(curMethod->clazz, ref,METHOD_VIRTUAL);
            if (baseMethod == NULL) {
                ILOGV("+ unknown method or access denied\n");
                GOTO_exceptionThrown();
            }
        }

        /*
         * Combine the object we found with the vtable offset in the
         * method.
         */
        assert(baseMethod->methodIndex < thisPtr->clazz->vtableCount);
        methodToCall = thisPtr->clazz->vtable[baseMethod->methodIndex];

#if 0
        if (dvmIsAbstractMethod(methodToCall)) {
            /*
             * This can happen if you create two classes, Base and Sub, where
             * Sub is a sub-class of Base.  Declare a protected abstract
             * method foo() in Base, and invoke foo() from a method in Base.
             * Base is an "abstract base class" and is never instantiated
             * directly.  Now, Override foo() in Sub, and use Sub.  This
             * Works fine unless Sub stops providing an implementation of
             * the method.
             */
            dvmThrowException("Ljava/lang/AbstractMethodError;",
                "abstract method not implemented");
            GOTO_exceptionThrown();
        }
#else
        assert(!dvmIsAbstractMethod(methodToCall) ||
            methodToCall->nativeFunc != NULL);
#endif

        LOGVV("+++ base=%s.%s virtual[%d]=%s.%s\n",
            baseMethod->clazz->descriptor, baseMethod->name,
            (u4) baseMethod->methodIndex,
            methodToCall->clazz->descriptor, methodToCall->name);
        assert(methodToCall != NULL);

#if 0
        if (vsrc1 != methodToCall->insSize) {
            LOGW("WRONG METHOD: base=%s.%s virtual[%d]=%s.%s\n",
                baseMethod->clazz->descriptor, baseMethod->name,
                (u4) baseMethod->methodIndex,
                methodToCall->clazz->descriptor, methodToCall->name);
            //dvmDumpClass(baseMethod->clazz);
            //dvmDumpClass(methodToCall->clazz);
            dvmDumpAllClasses(0);
        }
#endif

        GOTO_invokeMethod(methodCallRange, methodToCall, vsrc1, vdst);
    }
Ejemplo n.º 6
0
/*
 * Alternate version of dvmResolveMethod().
 *
 * Doesn't throw exceptions, and checks access on every lookup.
 *
 * On failure, returns NULL, and sets *pFailure if pFailure is not NULL.
 */
Method* dvmOptResolveMethod(ClassObject* referrer, u4 methodIdx,
    MethodType methodType, VerifyError* pFailure)
{
    DvmDex* pDvmDex = referrer->pDvmDex;
    Method* resMethod;

    assert(methodType == METHOD_DIRECT ||
           methodType == METHOD_VIRTUAL ||
           methodType == METHOD_STATIC);

    LOGVV("--- resolving method %u (referrer=%s)", methodIdx,
        referrer->descriptor);

    resMethod = dvmDexGetResolvedMethod(pDvmDex, methodIdx);
    if (resMethod == NULL) {
        const DexMethodId* pMethodId;
        ClassObject* resClass;

        pMethodId = dexGetMethodId(pDvmDex->pDexFile, methodIdx);

        resClass = dvmOptResolveClass(referrer, pMethodId->classIdx, pFailure);
        if (resClass == NULL) {
            /*
             * Can't find the class that the method is a part of, or don't
             * have permission to access the class.
             */
            ALOGV("DexOpt: can't find called method's class (?.%s)",
                dexStringById(pDvmDex->pDexFile, pMethodId->nameIdx));
            if (pFailure != NULL) { assert(!VERIFY_OK(*pFailure)); }
            return NULL;
        }
        if (dvmIsInterfaceClass(resClass)) {
            /* method is part of an interface; this is wrong method for that */
            ALOGW("DexOpt: method is in an interface");
            if (pFailure != NULL)
                *pFailure = VERIFY_ERROR_GENERIC;
            return NULL;
        }

        /*
         * We need to chase up the class hierarchy to find methods defined
         * in super-classes.  (We only want to check the current class
         * if we're looking for a constructor.)
         */
        DexProto proto;
        dexProtoSetFromMethodId(&proto, pDvmDex->pDexFile, pMethodId);

        if (methodType == METHOD_DIRECT) {
            resMethod = dvmFindDirectMethod(resClass,
                dexStringById(pDvmDex->pDexFile, pMethodId->nameIdx), &proto);
        } else {
            /* METHOD_STATIC or METHOD_VIRTUAL */
            resMethod = dvmFindMethodHier(resClass,
                dexStringById(pDvmDex->pDexFile, pMethodId->nameIdx), &proto);
        }

        if (resMethod == NULL) {
            ALOGV("DexOpt: couldn't find method '%s'",
                dexStringById(pDvmDex->pDexFile, pMethodId->nameIdx));
            if (pFailure != NULL)
                *pFailure = VERIFY_ERROR_NO_METHOD;
            return NULL;
        }
        if (methodType == METHOD_STATIC) {
            if (!dvmIsStaticMethod(resMethod)) {
                ALOGD("DexOpt: wanted static, got instance for method %s.%s",
                    resClass->descriptor, resMethod->name);
                if (pFailure != NULL)
                    *pFailure = VERIFY_ERROR_CLASS_CHANGE;
                return NULL;
            }
        } else if (methodType == METHOD_VIRTUAL) {
            if (dvmIsStaticMethod(resMethod)) {
                ALOGD("DexOpt: wanted instance, got static for method %s.%s",
                    resClass->descriptor, resMethod->name);
                if (pFailure != NULL)
                    *pFailure = VERIFY_ERROR_CLASS_CHANGE;
                return NULL;
            }
        }

        /* see if this is a pure-abstract method */
        if (dvmIsAbstractMethod(resMethod) && !dvmIsAbstractClass(resClass)) {
            ALOGW("DexOpt: pure-abstract method '%s' in %s",
                dexStringById(pDvmDex->pDexFile, pMethodId->nameIdx),
                resClass->descriptor);
            if (pFailure != NULL)
                *pFailure = VERIFY_ERROR_GENERIC;
            return NULL;
        }

        /*
         * Add it to the resolved table so we're faster on the next lookup.
         *
         * We can only do this for static methods if we're not in "dexopt",
         * because the presence of a valid value in the resolution table
         * implies that the class containing the static field has been
         * initialized.
         */
        if (methodType != METHOD_STATIC || gDvm.optimizing)
            dvmDexSetResolvedMethod(pDvmDex, methodIdx, resMethod);
    }

    LOGVV("--- found method %d (%s.%s)",
        methodIdx, resMethod->clazz->descriptor, resMethod->name);

    /* access allowed? */
    tweakLoader(referrer, resMethod->clazz);
    bool allowed = dvmCheckMethodAccess(referrer, resMethod);
    untweakLoader(referrer, resMethod->clazz);
    if (!allowed) {
        IF_ALOGI() {
            char* desc = dexProtoCopyMethodDescriptor(&resMethod->prototype);
            ALOGI("DexOpt: illegal method access (call %s.%s %s from %s)",
                resMethod->clazz->descriptor, resMethod->name, desc,
                referrer->descriptor);
            free(desc);
        }