/*
* static Class findLoadedClass(ClassLoader cl, String name)
*/
static void Dalvik_java_lang_VMClassLoader_findLoadedClass(const u4* args,
JValue* pResult)
{
Object* loader = (Object*) args[0];
StringObject* nameObj = (StringObject*) args[1];
ClassObject* clazz = NULL;
char* name = NULL;
char* descriptor = NULL;
if (nameObj == NULL) {
dvmThrowException("Ljava/lang/NullPointerException;", NULL);
goto bail;
}
/*
* Get a UTF-8 copy of the string, and convert dots to slashes.
*/
name = dvmCreateCstrFromString(nameObj);
if (name == NULL)
goto bail;
descriptor = dvmDotToDescriptor(name);
if (descriptor == NULL)
goto bail;
clazz = dvmLookupClass(descriptor, loader, false);
LOGVV("look: %s ldr=%p --> %p\n", descriptor, loader, clazz);
bail:
free(name);
free(descriptor);
RETURN_PTR(clazz);
}
/*
* Induce verification on all classes loaded from this DEX file as part
* of pre-verification and optimization. This is never called from a
* normally running VM.
*
* Returns "true" when all classes have been processed.
*/
bool dvmVerifyAllClasses(DexFile* pDexFile)
{
u4 count = pDexFile->pHeader->classDefsSize;
u4 idx;
assert(gDvm.optimizing);
if (gDvm.classVerifyMode == VERIFY_MODE_NONE) {
LOGV("+++ verification is disabled, skipping all classes\n");
return true;
}
if (gDvm.classVerifyMode == VERIFY_MODE_REMOTE &&
gDvm.optimizingBootstrapClass)
{
LOGV("+++ verification disabled for bootstrap classes\n");
return true;
}
for (idx = 0; idx < count; idx++) {
const DexClassDef* pClassDef;
const char* classDescriptor;
ClassObject* clazz;
pClassDef = dexGetClassDef(pDexFile, idx);
classDescriptor = dexStringByTypeIdx(pDexFile, pClassDef->classIdx);
/* all classes are loaded into the bootstrap class loader */
clazz = dvmLookupClass(classDescriptor, NULL, false);
if (clazz != NULL) {
if (clazz->pDvmDex->pDexFile != pDexFile) {
LOGD("DexOpt: not verifying '%s': multiple definitions\n",
classDescriptor);
} else {
if (dvmVerifyClass(clazz, VERIFY_DEFAULT)) {
assert((clazz->accessFlags & JAVA_FLAGS_MASK) ==
pClassDef->accessFlags);
((DexClassDef*)pClassDef)->accessFlags |=
CLASS_ISPREVERIFIED;
}
/* keep going even if one fails */
}
} else {
LOGV("DexOpt: +++ not verifying '%s'\n", classDescriptor);
}
}
return true;
}
/*
* Verify and/or optimize all classes that were successfully loaded from
* this DEX file.
*/
static void verifyAndOptimizeClasses(DexFile* pDexFile, bool doVerify,
bool doOpt)
{
u4 count = pDexFile->pHeader->classDefsSize;
u4 idx;
/*
* Create a data structure for use by the bytecode optimizer. We
* stuff it into a global so we don't have to pass it around as
* a function argument.
*
* We could create this at VM startup, but there's no need to do so
* unless we're optimizing, which means we're in dexopt, and we're
* only going to call here once.
*/
if (doOpt) {
gDvm.inlineSubs = dvmCreateInlineSubsTable();
if (gDvm.inlineSubs == NULL)
return;
}
for (idx = 0; idx < count; idx++) {
const DexClassDef* pClassDef;
const char* classDescriptor;
ClassObject* clazz;
pClassDef = dexGetClassDef(pDexFile, idx);
classDescriptor = dexStringByTypeIdx(pDexFile, pClassDef->classIdx);
/* all classes are loaded into the bootstrap class loader */
clazz = dvmLookupClass(classDescriptor, NULL, false);
if (clazz != NULL) {
verifyAndOptimizeClass(pDexFile, clazz, pClassDef, doVerify, doOpt);
} else {
// TODO: log when in verbose mode
LOGV("DexOpt: not optimizing unavailable class '%s'\n",
classDescriptor);
}
}
if (gDvm.inlineSubs != NULL) {
dvmFreeInlineSubsTable(gDvm.inlineSubs);
gDvm.inlineSubs = NULL;
}
}
// Based on dvmResolveClass.
static void preloadDexCachesResolveType(DvmDex* pDvmDex, uint32_t typeIdx) {
ClassObject* clazz = dvmDexGetResolvedClass(pDvmDex, typeIdx);
if (clazz != NULL) {
return;
}
const DexFile* pDexFile = pDvmDex->pDexFile;
const char* className = dexStringByTypeIdx(pDexFile, typeIdx);
if (className[0] != '\0' && className[1] == '\0') {
/* primitive type */
clazz = dvmFindPrimitiveClass(className[0]);
} else {
clazz = dvmLookupClass(className, NULL, true);
}
if (clazz == NULL) {
return;
}
// Skip uninitialized classes because filled cache entry implies it is initialized.
if (!dvmIsClassInitialized(clazz)) {
// ALOGI("VMRuntime.preloadDexCaches uninitialized clazz=%s", className);
return;
}
// ALOGI("VMRuntime.preloadDexCaches found clazz=%s", className);
dvmDexSetResolvedClass(pDvmDex, typeIdx, clazz);
}
/*
* static boolean cacheRegisterMap(String classAndMethodDescr)
*
* If the specified class is loaded, and the named method exists, ensure
* that the method's register map is ready for use. If the class/method
* cannot be found, nothing happens.
*
* This can improve the zygote's sharing of compressed register maps. Do
* this after class preloading.
*
* Returns true if the register map is cached and ready, either as a result
* of this call or earlier activity. Returns false if the class isn't loaded,
* if the method couldn't be found, or if the method has no register map.
*
* (Uncomment logs in dvmGetExpandedRegisterMap0() to gather stats.)
*/
static void Dalvik_dalvik_system_VMDebug_cacheRegisterMap(const u4* args,
JValue* pResult)
{
StringObject* classAndMethodDescStr = (StringObject*) args[0];
ClassObject* clazz;
bool result = false;
if (classAndMethodDescStr == NULL) {
dvmThrowNullPointerException("classAndMethodDesc == null");
RETURN_VOID();
}
char* classAndMethodDesc = NULL;
/*
* Pick the string apart. We have a local copy, so just modify it
* in place.
*/
classAndMethodDesc = dvmCreateCstrFromString(classAndMethodDescStr);
char* methodName = strchr(classAndMethodDesc, '.');
if (methodName == NULL) {
dvmThrowRuntimeException("method name not found in string");
RETURN_VOID();
}
*methodName++ = '\0';
char* methodDescr = strchr(methodName, ':');
if (methodDescr == NULL) {
dvmThrowRuntimeException("method descriptor not found in string");
RETURN_VOID();
}
*methodDescr++ = '\0';
//ALOGD("GOT: %s %s %s", classAndMethodDesc, methodName, methodDescr);
/*
* Find the class, but only if it's already loaded.
*/
clazz = dvmLookupClass(classAndMethodDesc, NULL, false);
if (clazz == NULL) {
ALOGD("Class %s not found in bootstrap loader", classAndMethodDesc);
goto bail;
}
Method* method;
/*
* Find the method, which could be virtual or direct, defined directly
* or inherited.
*/
if (methodName[0] == '<') {
/*
* Constructor or class initializer. Only need to examine the
* "direct" list, and don't need to search up the class hierarchy.
*/
method = dvmFindDirectMethodByDescriptor(clazz, methodName,
methodDescr);
} else {
/*
* Try both lists, and scan up the tree.
*/
method = dvmFindVirtualMethodHierByDescriptor(clazz, methodName,
methodDescr);
if (method == NULL) {
method = dvmFindDirectMethodHierByDescriptor(clazz, methodName,
methodDescr);
}
}
if (method != NULL) {
/*
* Got it. See if there's a register map here.
*/
const RegisterMap* pMap;
pMap = dvmGetExpandedRegisterMap(method);
if (pMap == NULL) {
ALOGV("No map for %s.%s %s",
classAndMethodDesc, methodName, methodDescr);
} else {
ALOGV("Found map %s.%s %s",
classAndMethodDesc, methodName, methodDescr);
result = true;
}
} else {
ALOGV("Unable to find %s.%s %s",
classAndMethodDesc, methodName, methodDescr);
}
bail:
free(classAndMethodDesc);
RETURN_BOOLEAN(result);
}
