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gerrit-public.fairphone.software / platform / dalvik / 5fdab4a32b9cd404708247953c3a56c75a0a0bcf / . / vm / CheckJni.c
blob: 59d34ebac0c6ec09a89879557ac16db653580ac3 [file] [log] [blame]
/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Support for -Xcheck:jni (the "careful" version of the JNI interfaces).
*
* We want to verify types, make sure class and field IDs are valid, and
* ensure that JNI's semantic expectations are being met. JNI seems to
* be relatively lax when it comes to requirements for permission checks,
* e.g. access to private methods is generally allowed from anywhere.
*
* TODO: keep a counter on global Get/Release. Report a warning if some Gets
* were not Released. Do not count explicit Add/DeleteGlobalRef calls (or
* count them separately, so we can complain if they exceed a certain
* threshold).
*
* TODO: verify that the methodID passed into the Call functions is for
* a method in the specified class.
*/
#include "Dalvik.h"
#include "JniInternal.h"
#include <zlib.h>
static void abortMaybe(void); // fwd
/*
* ===========================================================================
* JNI call bridge wrapper
* ===========================================================================
*/
/*
* Check the result of a native method call that returns an object reference.
*
* The primary goal here is to verify that native code is returning the
* correct type of object. If it's declared to return a String but actually
* returns a byte array, things will fail in strange ways later on.
*
* This can be a fairly expensive operation, since we have to look up the
* return type class by name in method->clazz' class loader. We take a
* shortcut here and allow the call to succeed if the descriptor strings
* match. This will allow some false-positives when a class is redefined
* by a class loader, but that's rare enough that it doesn't seem worth
* testing for.
*
* At this point, pResult->l has already been converted to an object pointer.
*/
static void checkCallResultCommon(const u4* args, JValue* pResult,
const Method* method, Thread* self)
{
assert(pResult->l != NULL);
Object* resultObj = (Object*) pResult->l;
ClassObject* objClazz = resultObj->clazz;
/*
* Make sure that pResult->l is an instance of the type this
* method was expected to return.
*/
const char* declType = dexProtoGetReturnType(&method->prototype);
const char* objType = objClazz->descriptor;
if (strcmp(declType, objType) == 0) {
/* names match; ignore class loader issues and allow it */
LOGV("Check %s.%s: %s io %s (FAST-OK)\n",
method->clazz->descriptor, method->name, objType, declType);
} else {
/*
* Names didn't match. We need to resolve declType in the context
* of method->clazz->classLoader, and compare the class objects
* for equality.
*
* Since we're returning an instance of declType, it's safe to
* assume that it has been loaded and initialized (or, for the case
* of an array, generated). However, the current class loader may
* not be listed as an initiating loader, so we can't just look for
* it in the loaded-classes list.
*/
ClassObject* declClazz;
declClazz = dvmFindClassNoInit(declType, method->clazz->classLoader);
if (declClazz == NULL) {
LOGW("JNI WARNING: method declared to return '%s' returned '%s'\n",
declType, objType);
LOGW(" failed in %s.%s ('%s' not found)\n",
method->clazz->descriptor, method->name, declType);
abortMaybe();
return;
}
if (!dvmInstanceof(objClazz, declClazz)) {
LOGW("JNI WARNING: method declared to return '%s' returned '%s'\n",
declType, objType);
LOGW(" failed in %s.%s\n",
method->clazz->descriptor, method->name);
abortMaybe();
return;
} else {
LOGV("Check %s.%s: %s io %s (SLOW-OK)\n",
method->clazz->descriptor, method->name, objType, declType);
}
}
}
/*
* Determine if we need to check the return type coming out of the call.
*
* (We don't do this at the top of checkCallResultCommon() because this is on
* the critical path for native method calls.)
*/
static inline bool callNeedsCheck(const u4* args, JValue* pResult,
const Method* method, Thread* self)
{
return (method->shorty[0] == 'L' && !dvmCheckException(self) &&
pResult->l != NULL);
}
/*
* Check a call into native code.
*/
void dvmCheckCallJNIMethod_general(const u4* args, JValue* pResult,
const Method* method, Thread* self)
{
dvmCallJNIMethod_general(args, pResult, method, self);
if (callNeedsCheck(args, pResult, method, self))
checkCallResultCommon(args, pResult, method, self);
}
/*
* Check a synchronized call into native code.
*/
void dvmCheckCallJNIMethod_synchronized(const u4* args, JValue* pResult,
const Method* method, Thread* self)
{
dvmCallJNIMethod_synchronized(args, pResult, method, self);
if (callNeedsCheck(args, pResult, method, self))
checkCallResultCommon(args, pResult, method, self);
}
/*
* Check a virtual call with no reference arguments (other than "this").
*/
void dvmCheckCallJNIMethod_virtualNoRef(const u4* args, JValue* pResult,
const Method* method, Thread* self)
{
dvmCallJNIMethod_virtualNoRef(args, pResult, method, self);
if (callNeedsCheck(args, pResult, method, self))
checkCallResultCommon(args, pResult, method, self);
}
/*
* Check a static call with no reference arguments (other than "clazz").
*/
void dvmCheckCallJNIMethod_staticNoRef(const u4* args, JValue* pResult,
const Method* method, Thread* self)
{
dvmCallJNIMethod_staticNoRef(args, pResult, method, self);
if (callNeedsCheck(args, pResult, method, self))
checkCallResultCommon(args, pResult, method, self);
}
/*
* ===========================================================================
* JNI function helpers
* ===========================================================================
*/
#define JNI_ENTER() dvmChangeStatus(NULL, THREAD_RUNNING)
#define JNI_EXIT() dvmChangeStatus(NULL, THREAD_NATIVE)
#define BASE_ENV(_env) (((JNIEnvExt*)_env)->baseFuncTable)
#define BASE_VM(_vm) (((JavaVMExt*)_vm)->baseFuncTable)
#define kRedundantDirectBufferTest false
/*
* Flags passed into checkThread().
*/
#define kFlag_Default 0x0000
#define kFlag_CritBad 0x0000 /* calling while in critical is bad */
#define kFlag_CritOkay 0x0001 /* ...okay */
#define kFlag_CritGet 0x0002 /* this is a critical "get" */
#define kFlag_CritRelease 0x0003 /* this is a critical "release" */
#define kFlag_CritMask 0x0003 /* bit mask to get "crit" value */
#define kFlag_ExcepBad 0x0000 /* raised exceptions are bad */
#define kFlag_ExcepOkay 0x0004 /* ...okay */
/*
* Enter/exit macros for JNI env "check" functions. These do not change
* the thread state within the VM.
*/
#define CHECK_ENTER(_env, _flags) \
do { \
JNI_TRACE(true, true); \
checkThread(_env, _flags, __FUNCTION__); \
} while(false)
#define CHECK_EXIT(_env) \
do { JNI_TRACE(false, true); } while(false)
/*
* Enter/exit macros for JNI invocation interface "check" functions. These
* do not change the thread state within the VM.
*
* Set "_hasmeth" to true if we have a valid thread with a method pointer.
* We won't have one before attaching a thread, after detaching a thread, or
* after destroying the VM.
*/
#define CHECK_VMENTER(_vm, _hasmeth) \
do { JNI_TRACE(true, _hasmeth); } while(false)
#define CHECK_VMEXIT(_vm, _hasmeth) \
do { JNI_TRACE(false, _hasmeth); } while(false)
#define CHECK_FIELD_TYPE(_env, _obj, _fieldid, _prim, _isstatic) \
checkFieldType(_env, _obj, _fieldid, _prim, _isstatic, __FUNCTION__)
#define CHECK_INST_FIELD_ID(_env, _obj, _fieldid) \
checkInstanceFieldID(_env, _obj, _fieldid, __FUNCTION__)
#define CHECK_CLASS(_env, _clazz) \
checkClass(_env, _clazz, __FUNCTION__)
#define CHECK_STRING(_env, _str) \
checkString(_env, _str, __FUNCTION__)
#define CHECK_UTF_STRING(_env, _str, _nullok) \
checkUtfString(_env, _str, _nullok, __FUNCTION__)
#define CHECK_CLASS_NAME(_env, _str) \
checkClassName(_env, _str, __FUNCTION__)
#define CHECK_OBJECT(_env, _obj) \
checkObject(_env, _obj, __FUNCTION__)
#define CHECK_ARRAY(_env, _array) \
checkArray(_env, _array, __FUNCTION__)
#define CHECK_RELEASE_MODE(_env, _mode) \
checkReleaseMode(_env, _mode, __FUNCTION__)
#define CHECK_LENGTH_POSITIVE(_env, _length) \
checkLengthPositive(_env, _length, __FUNCTION__)
#define CHECK_NON_NULL(_env, _ptr) \
checkNonNull(_env, _ptr, __FUNCTION__)
#define CHECK_SIG(_env, _methid, _sigbyte, _isstatic) \
checkSig(_env, _methid, _sigbyte, _isstatic, __FUNCTION__)
#define CHECK_VIRTUAL_METHOD(_env, _obj, _methid) \
checkVirtualMethod(_env, _obj, _methid, __FUNCTION__)
#define CHECK_STATIC_METHOD(_env, _clazz, _methid) \
checkStaticMethod(_env, _clazz, _methid, __FUNCTION__)
#define CHECK_METHOD_ARGS_A(_env, _methid, _args) \
checkMethodArgsA(_env, _methid, _args, __FUNCTION__)
#define CHECK_METHOD_ARGS_V(_env, _methid, _args) \
checkMethodArgsV(_env, _methid, _args, __FUNCTION__)
/*
* Prints trace messages when a native method calls a JNI function such as
* NewByteArray. Enabled if both "-Xcheck:jni" and "-verbose:jni" are enabled.
*/
#define JNI_TRACE(_entry, _hasmeth) \
do { \
if (gDvm.verboseJni && (_entry)) { \
static const char* classDescriptor = "???"; \
static const char* methodName = "???"; \
if (_hasmeth) { \
const Method* meth = dvmGetCurrentJNIMethod(); \
classDescriptor = meth->clazz->descriptor; \
methodName = meth->name; \
} \
/* use +6 to drop the leading "Check_" */ \
LOGI("JNI: %s (from %s.%s)", \
(__FUNCTION__)+6, classDescriptor, methodName); \
} \
} while(false)
/*
* Log the current location.
*
* "func" looks like "Check_DeleteLocalRef"; we drop the "Check_".
*/
static void showLocation(const Method* meth, const char* func)
{
char* desc = dexProtoCopyMethodDescriptor(&meth->prototype);
LOGW(" in %s.%s %s (%s)\n",
meth->clazz->descriptor, meth->name, desc, func + 6);
free(desc);
}
/*
* Abort if we are configured to bail out on JNI warnings.
*/
static void abortMaybe(void)
{
JavaVMExt* vm = (JavaVMExt*) gDvm.vmList;
if (vm->warnError) {
dvmDumpThread(dvmThreadSelf(), false);
dvmAbort();
}
}
/*
* Verify that the current thread is (a) attached and (b) associated with
* this particular instance of JNIEnv.
*
* Verify that, if this thread previously made a critical "get" call, we
* do the corresponding "release" call before we try anything else.
*
* Verify that, if an exception has been raised, the native code doesn't
* make any JNI calls other than the Exception* methods.
*
* TODO? if we add support for non-JNI native calls, make sure that the
* method at the top of the interpreted stack is a JNI method call. (Or
* set a flag in the Thread/JNIEnv when the call is made and clear it on
* return?)
*
* NOTE: we are still in THREAD_NATIVE mode. A GC could happen at any time.
*/
static void checkThread(JNIEnv* env, int flags, const char* func)
{
JNIEnvExt* threadEnv;
bool printWarn = false;
bool printException = false;
/* get the *correct* JNIEnv by going through our TLS pointer */
threadEnv = dvmGetJNIEnvForThread();
/*
* Verify that the JNIEnv we've been handed matches what we expected
* to receive.
*/
if (threadEnv == NULL) {
LOGE("JNI ERROR: non-VM thread making JNI calls\n");
// don't set printWarn -- it'll try to call showLocation()
dvmAbort();
} else if ((JNIEnvExt*) env != threadEnv) {
if (dvmThreadSelf()->threadId != threadEnv->envThreadId) {
LOGE("JNI: threadEnv != thread->env?\n");
dvmAbort();
}
LOGW("JNI WARNING: threadid=%d using env from threadid=%d\n",
threadEnv->envThreadId, ((JNIEnvExt*)env)->envThreadId);
printWarn = true;
/* this is a bad idea -- need to throw as we exit, or abort func */
//dvmThrowException("Ljava/lang/RuntimeException;",
// "invalid use of JNI env ptr");
} else if (((JNIEnvExt*) env)->self != dvmThreadSelf()) {
/* correct JNIEnv*; make sure the "self" pointer is correct */
LOGE("JNI ERROR: env->self != thread-self (%p vs. %p)\n",
((JNIEnvExt*) env)->self, dvmThreadSelf());
dvmAbort();
}
/*
* Check for critical resource misuse.
*/
switch (flags & kFlag_CritMask) {
case kFlag_CritOkay: // okay to call this method
break;
case kFlag_CritBad: // not okay to call
if (threadEnv->critical) {
LOGW("JNI WARNING: threadid=%d using JNI after critical get\n",
threadEnv->envThreadId);
printWarn = true;
}
break;
case kFlag_CritGet: // this is a "get" call
/* don't check here; we allow nested gets */
threadEnv->critical++;
break;
case kFlag_CritRelease: // this is a "release" call
threadEnv->critical--;
if (threadEnv->critical < 0) {
LOGW("JNI WARNING: threadid=%d called too many crit releases\n",
threadEnv->envThreadId);
printWarn = true;
}
break;
default:
assert(false);
}
/*
* Check for raised exceptions.
*/
if ((flags & kFlag_ExcepOkay) == 0 && dvmCheckException(dvmThreadSelf())) {
LOGW("JNI WARNING: JNI method called with exception raised\n");
printWarn = true;
printException = true;
}
if (printWarn)
showLocation(dvmGetCurrentJNIMethod(), func);
if (printException) {
LOGW("Pending exception is:\n");
dvmLogExceptionStackTrace();
}
if (printWarn)
abortMaybe();
}
/*
* Verify that the field is of the appropriate type. If the field has an
* object type, "obj" is the object we're trying to assign into it.
*
* Works for both static and instance fields.
*/
static void checkFieldType(JNIEnv* env, jobject jobj, jfieldID fieldID,
PrimitiveType prim, bool isStatic, const char* func)
{
static const char* primNameList[] = {
"Object/Array", "boolean", "char", "float", "double",
"byte", "short", "int", "long", "void"
};
const char** primNames = &primNameList[1]; // shift up for PRIM_NOT
Field* field = (Field*) fieldID;
bool printWarn = false;
if (fieldID == NULL) {
LOGE("JNI ERROR: null field ID\n");
abortMaybe();
}
if (field->signature[0] == 'L' || field->signature[0] == '[') {
Object* obj = dvmDecodeIndirectRef(env, jobj);
if (obj != NULL) {
ClassObject* fieldClass =
dvmFindLoadedClass(field->signature);
ClassObject* objClass = obj->clazz;
assert(fieldClass != NULL);
assert(objClass != NULL);
if (!dvmInstanceof(objClass, fieldClass)) {
LOGW("JNI WARNING: field '%s' with type '%s' set with wrong type (%s)\n",
field->name, field->signature, objClass->descriptor);
printWarn = true;
}
}
} else if (field->signature[0] != PRIM_TYPE_TO_LETTER[prim]) {
LOGW("JNI WARNING: field '%s' with type '%s' set with wrong type (%s)\n",
field->name, field->signature, primNames[prim]);
printWarn = true;
} else if (isStatic && !dvmIsStaticField(field)) {
if (isStatic)
LOGW("JNI WARNING: accessing non-static field %s as static\n",
field->name);
else
LOGW("JNI WARNING: accessing static field %s as non-static\n",
field->name);
printWarn = true;
}
if (printWarn) {
showLocation(dvmGetCurrentJNIMethod(), func);
abortMaybe();
}
}
/*
* Verify that "jobj" is a valid object, and that it's an object that JNI
* is allowed to know about. We allow NULL references.
*
* Must be in "running" mode before calling here.
*/
static void checkObject0(JNIEnv* env, jobject jobj, const char* func)
{
UNUSED_PARAMETER(env);
bool printWarn = false;
if (jobj == NULL)
return;
if (dvmIsWeakGlobalRef(jobj)) {
/*
* Normalize and continue. This will tell us if the PhantomReference
* object is valid.
*/
jobj = dvmNormalizeWeakGlobalRef((jweak) jobj);
}
if (dvmGetJNIRefType(env, jobj) == JNIInvalidRefType) {
LOGW("JNI WARNING: %p is not a valid JNI reference\n", jobj);
printWarn = true;
} else {
Object* obj = dvmDecodeIndirectRef(env, jobj);
if (obj == NULL || !dvmIsValidObject(obj)) {
LOGW("JNI WARNING: native code passing in bad object %p %p (%s)\n",
jobj, obj, func);
printWarn = true;
}
}
if (printWarn) {
showLocation(dvmGetCurrentJNIMethod(), func);
abortMaybe();
}
}
/*
* Verify that "jobj" is a valid object, and that it's an object that JNI
* is allowed to know about. We allow NULL references.
*
* Switches to "running" mode before performing checks.
*/
static void checkObject(JNIEnv* env, jobject jobj, const char* func)
{
JNI_ENTER();
checkObject0(env, jobj, func);
JNI_EXIT();
}
/*
* Verify that "clazz" actually points to a class object. (Also performs
* checkObject.)
*
* We probably don't need to identify where we're being called from,
* because the VM is most likely about to crash and leave a core dump
* if something is wrong.
*
* Because we're looking at an object on the GC heap, we have to switch
* to "running" mode before doing the checks.
*/
static void checkClass(JNIEnv* env, jclass jclazz, const char* func)
{
JNI_ENTER();
bool printWarn = false;
Object* obj = dvmDecodeIndirectRef(env, jclazz);
if (obj == NULL) {
LOGW("JNI WARNING: received null jclass\n");
printWarn = true;
} else if (!dvmIsValidObject(obj)) {
LOGW("JNI WARNING: jclass points to invalid object %p\n", obj);
printWarn = true;
} else if (obj->clazz != gDvm.classJavaLangClass) {
LOGW("JNI WARNING: jclass arg is not a Class reference "
"(%p is instance of %s)\n",
jclazz, obj->clazz->descriptor);
printWarn = true;
}
JNI_EXIT();
if (printWarn)
abortMaybe();
else
checkObject(env, jclazz, func);
}
/*
* Verify that "str" is non-NULL and points to a String object.
*
* Since we're dealing with objects, switch to "running" mode.
*/
static void checkString(JNIEnv* env, jstring jstr, const char* func)
{
JNI_ENTER();
bool printWarn = false;
Object* obj = dvmDecodeIndirectRef(env, jstr);
if (obj == NULL) {
LOGW("JNI WARNING: received null jstring (%s)\n", func);
printWarn = true;
} else if (obj->clazz != gDvm.classJavaLangString) {
/*
* TODO: we probably should test dvmIsValidObject first, because
* this will crash if "obj" is non-null but pointing to an invalid
* memory region. However, the "is valid" test is a little slow,
* we're doing it again over in checkObject().
*/
if (dvmIsValidObject(obj))
LOGW("JNI WARNING: jstring %p points to non-string object (%s)\n",
jstr, func);
else
LOGW("JNI WARNING: jstring %p is bogus (%s)\n", jstr, func);
printWarn = true;
}
JNI_EXIT();
if (printWarn)
abortMaybe();
else
checkObject(env, jstr, func);
}
/*
* Verify that "bytes" points to valid "modified UTF-8" data.
*/
static void checkUtfString(JNIEnv* env, const char* bytes, bool nullOk,
const char* func)
{
const char* origBytes = bytes;
if (bytes == NULL) {
if (!nullOk) {
LOGW("JNI WARNING: unexpectedly null UTF string\n");
goto fail;
}
return;
}
while (*bytes != '\0') {
u1 utf8 = *(bytes++);
// Switch on the high four bits.
switch (utf8 >> 4) {
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x06:
case 0x07: {
// Bit pattern 0xxx. No need for any extra bytes.
break;
}
case 0x08:
case 0x09:
case 0x0a:
case 0x0b:
case 0x0f: {
/*
* Bit pattern 10xx or 1111, which are illegal start bytes.
* Note: 1111 is valid for normal UTF-8, but not the
* modified UTF-8 used here.
*/
LOGW("JNI WARNING: illegal start byte 0x%x\n", utf8);
goto fail;
}
case 0x0e: {
// Bit pattern 1110, so there are two additional bytes.
utf8 = *(bytes++);
if ((utf8 & 0xc0) != 0x80) {
LOGW("JNI WARNING: illegal continuation byte 0x%x\n", utf8);
goto fail;
}
// Fall through to take care of the final byte.
}
case 0x0c:
case 0x0d: {
// Bit pattern 110x, so there is one additional byte.
utf8 = *(bytes++);
if ((utf8 & 0xc0) != 0x80) {
LOGW("JNI WARNING: illegal continuation byte 0x%x\n", utf8);
goto fail;
}
break;
}
}
}
return;
fail:
LOGW(" string: '%s'\n", origBytes);
showLocation(dvmGetCurrentJNIMethod(), func);
abortMaybe();
}
/*
* In some circumstances the VM will screen class names, but it doesn't
* for class lookup. When things get bounced through a class loader, they
* can actually get normalized a couple of times; as a result, passing in
* a class name like "java.lang.Thread" instead of "java/lang/Thread" will
* work in some circumstances.
*
* This is incorrect and could cause strange behavior or compatibility
* problems, so we want to screen that out here.
*
* We expect "full-qualified" class names, like "java/lang/Thread" or
* "[Ljava/lang/Object;".
*/
static void checkClassName(JNIEnv* env, const char* className, const char* func)
{
const char* cp;
/* quick check for illegal chars */
cp = className;
while (*cp != '\0') {
if (*cp == '.') /* catch "java.lang.String" */
goto fail;
cp++;
}
if (*(cp-1) == ';' && *className == 'L')
goto fail; /* catch "Ljava/lang/String;" */
// TODO: need a more rigorous check here
return;
fail:
LOGW("JNI WARNING: illegal class name '%s' (%s)\n", className, func);
LOGW(" (should be formed like 'java/lang/String')\n");
abortMaybe();
}
/*
* Verify that "array" is non-NULL and points to an Array object.
*
* Since we're dealing with objects, switch to "running" mode.
*/
static void checkArray(JNIEnv* env, jarray jarr, const char* func)
{
JNI_ENTER();
bool printWarn = false;
Object* obj = dvmDecodeIndirectRef(env, jarr);
if (obj == NULL) {
LOGW("JNI WARNING: received null array (%s)\n", func);
printWarn = true;
} else if (obj->clazz->descriptor[0] != '[') {
if (dvmIsValidObject(obj))
LOGW("JNI WARNING: jarray %p points to non-array object (%s)\n",
jarr, obj->clazz->descriptor);
else
LOGW("JNI WARNING: jarray %p is bogus\n", jarr);
printWarn = true;
}
JNI_EXIT();
if (printWarn)
abortMaybe();
else
checkObject(env, jarr, func);
}
/*
* Verify that the "mode" argument passed to a primitive array Release
* function is one of the valid values.
*/
static void checkReleaseMode(JNIEnv* env, jint mode, const char* func)
{
if (mode != 0 && mode != JNI_COMMIT && mode != JNI_ABORT) {
LOGW("JNI WARNING: bad value for mode (%d) (%s)\n", mode, func);
abortMaybe();
}
}
/*
* Verify that the length argument to array-creation calls is >= 0.
*/
static void checkLengthPositive(JNIEnv* env, jsize length, const char* func)
{
if (length < 0) {
LOGW("JNI WARNING: negative length for array allocation (%s)\n", func);
abortMaybe();
}
}
/*
* Verify that the pointer value is non-NULL.
*/
static void checkNonNull(JNIEnv* env, const void* ptr, const char* func)
{
if (ptr == NULL) {
LOGW("JNI WARNING: invalid null pointer (%s)\n", func);
abortMaybe();
}
}
/*
* Verify that the method's return type matches the type of call.
*
* "expectedSigByte" will be 'L' for all objects, including arrays.
*/
static void checkSig(JNIEnv* env, jmethodID methodID, char expectedSigByte,
bool isStatic, const char* func)
{
const Method* meth = (const Method*) methodID;
bool printWarn = false;
if (expectedSigByte != meth->shorty[0]) {
LOGW("JNI WARNING: expected return type '%c'\n", expectedSigByte);
printWarn = true;
} else if (isStatic && !dvmIsStaticMethod(meth)) {
if (isStatic)
LOGW("JNI WARNING: calling non-static method with static call\n");
else
LOGW("JNI WARNING: calling static method with non-static call\n");
printWarn = true;
}
if (printWarn) {
char* desc = dexProtoCopyMethodDescriptor(&meth->prototype);
LOGW(" calling %s.%s %s\n",
meth->clazz->descriptor, meth->name, desc);
free(desc);
showLocation(dvmGetCurrentJNIMethod(), func);
abortMaybe();
}
}
/*
* Verify that this static field ID is valid for this class.
*/
static void checkStaticFieldID(JNIEnv* env, jclass jclazz, jfieldID fieldID)
{
ClassObject* clazz = (ClassObject*) dvmDecodeIndirectRef(env, jclazz);
StaticField* base = &clazz->sfields[0];
int fieldCount = clazz->sfieldCount;
if ((StaticField*) fieldID < base ||
(StaticField*) fieldID >= base + fieldCount)
{
LOGW("JNI WARNING: static fieldID %p not valid for class %s\n",
fieldID, clazz->descriptor);
LOGW(" base=%p count=%d\n", base, fieldCount);
abortMaybe();
}
}
/*
* Verify that this instance field ID is valid for this object.
*/
static void checkInstanceFieldID(JNIEnv* env, jobject jobj, jfieldID fieldID,
const char* func)
{
JNI_ENTER();
if (jobj == NULL) {
LOGW("JNI WARNING: invalid null object (%s)\n", func);
abortMaybe();
goto bail;
}
Object* obj = dvmDecodeIndirectRef(env, jobj);
ClassObject* clazz = obj->clazz;
/*
* Check this class and all of its superclasses for a matching field.
* Don't need to scan interfaces.
*/
while (clazz != NULL) {
if ((InstField*) fieldID >= clazz->ifields &&
(InstField*) fieldID < clazz->ifields + clazz->ifieldCount)
{
goto bail;
}
clazz = clazz->super;
}
LOGW("JNI WARNING: inst fieldID %p not valid for class %s\n",
fieldID, obj->clazz->descriptor);
abortMaybe();
bail:
JNI_EXIT();
}
/*
* Verify that "methodID" is appropriate for "jobj".
*
* Make sure the object is an instance of the method's declaring class.
* (Note the methodID might point to a declaration in an interface; this
* will be handled automatically by the instanceof check.)
*/
static void checkVirtualMethod(JNIEnv* env, jobject jobj, jmethodID methodID,
const char* func)
{
JNI_ENTER();
Object* obj = dvmDecodeIndirectRef(env, jobj);
const Method* meth = (const Method*) methodID;
if (!dvmInstanceof(obj->clazz, meth->clazz)) {
LOGW("JNI WARNING: can't call %s.%s on instance of %s\n",
meth->clazz->descriptor, meth->name, obj->clazz->descriptor);
abortMaybe();
}
JNI_EXIT();
}
/*
* Verify that "methodID" is appropriate for "clazz".
*
* A mismatch isn't dangerous, because the method defines the class. In
* fact, jclazz is unused in the implementation. It's best if we don't
* allow bad code in the system though.
*
* Instances of "jclazz" must be instances of the method's declaring class.
*/
static void checkStaticMethod(JNIEnv* env, jclass jclazz, jmethodID methodID,
const char* func)
{
JNI_ENTER();
ClassObject* clazz = (ClassObject*) dvmDecodeIndirectRef(env, jclazz);
const Method* meth = (const Method*) methodID;
if (!dvmInstanceof(clazz, meth->clazz)) {
LOGW("JNI WARNING: can't call static %s.%s on class %s\n",
meth->clazz->descriptor, meth->name, clazz->descriptor);
// no abort
}
JNI_EXIT();
}
/*
* Verify that the reference arguments being passed in are appropriate for
* this method.
*
* At a minimum we want to make sure that the argument is a valid
* reference. We can also do a class lookup on the method signature
* and verify that the object is an instance of the appropriate class,
* but that's more expensive.
*
* The basic tests are redundant when indirect references are enabled,
* since reference arguments must always be converted explicitly. An
* instanceof test would not be redundant, but we're not doing that at
* this time.
*/
static void checkMethodArgsV(JNIEnv* env, jmethodID methodID, va_list args,
const char* func)
{
#ifndef USE_INDIRECT_REF
JNI_ENTER();
const Method* meth = (const Method*) methodID;
const char* desc = meth->shorty;
LOGV("V-checking %s.%s:%s...\n", meth->clazz->descriptor, meth->name, desc);
while (*++desc != '\0') { /* pre-incr to skip return type */
switch (*desc) {
case 'L':
{ /* 'shorty' descr uses L for all refs, incl array */
jobject argObj = va_arg(args, jobject);
checkObject0(env, argObj, func);
}
break;
case 'D': /* 8-byte double */
case 'J': /* 8-byte long */
case 'F': /* floats normalized to doubles */
(void) va_arg(args, u8);
break;
default: /* Z B C S I -- all passed as 32-bit integers */
(void) va_arg(args, u4);
break;
}
}
JNI_EXIT();
#endif
}
/*
* Same purpose as checkMethodArgsV, but with arguments in an array of
* jvalue structs.
*/
static void checkMethodArgsA(JNIEnv* env, jmethodID methodID, jvalue* args,
const char* func)
{
#ifndef USE_INDIRECT_REF
JNI_ENTER();
const Method* meth = (const Method*) methodID;
const char* desc = meth->shorty;
int idx = 0;
LOGV("A-checking %s.%s:%s...\n", meth->clazz->descriptor, meth->name, desc);
while (*++desc != '\0') { /* pre-incr to skip return type */
if (*desc == 'L') {
jobject argObj = args[idx].l;
checkObject0(env, argObj, func);
}
idx++;
}
JNI_EXIT();
#endif
}
/*
* ===========================================================================
* Guarded arrays
* ===========================================================================
*/
#define kGuardLen 512 /* must be multiple of 2 */
#define kGuardPattern 0xd5e3 /* uncommon values; d5e3d5e3 invalid addr */
#define kGuardMagic 0xffd5aa96
#define kGuardExtra sizeof(GuardExtra)
/* this gets tucked in at the start of the buffer; struct size must be even */
typedef struct GuardExtra {
u4 magic;
uLong adler;
size_t originalLen;
const void* originalPtr;
} GuardExtra;
/* find the GuardExtra given the pointer into the "live" data */
inline static GuardExtra* getGuardExtra(const void* dataBuf)
{
u1* fullBuf = ((u1*) dataBuf) - kGuardLen / 2;
return (GuardExtra*) fullBuf;
}
/*
* Create an oversized buffer to hold the contents of "buf". Copy it in,
* filling in the area around it with guard data.
*
* We use a 16-bit pattern to make a rogue memset less likely to elude us.
*/
static void* createGuardedCopy(const void* buf, size_t len, bool modOkay)
{
GuardExtra* pExtra;
size_t newLen = (len + kGuardLen +1) & ~0x01;
u1* newBuf;
u2* pat;
int i;
newBuf = (u1*)malloc(newLen);
if (newBuf == NULL) {
LOGE("createGuardedCopy failed on alloc of %d bytes\n", newLen);
dvmAbort();
}
/* fill it in with a pattern */
pat = (u2*) newBuf;
for (i = 0; i < (int)newLen / 2; i++)
*pat++ = kGuardPattern;
/* copy the data in; note "len" could be zero */
memcpy(newBuf + kGuardLen / 2, buf, len);
/* if modification is not expected, grab a checksum */
uLong adler = 0;
if (!modOkay) {
adler = adler32(0L, Z_NULL, 0);
adler = adler32(adler, buf, len);
*(uLong*)newBuf = adler;
}
pExtra = (GuardExtra*) newBuf;
pExtra->magic = kGuardMagic;
pExtra->adler = adler;
pExtra->originalPtr = buf;
pExtra->originalLen = len;
return newBuf + kGuardLen / 2;
}
/*
* Verify the guard area and, if "modOkay" is false, that the data itself
* has not been altered.
*
* The caller has already checked that "dataBuf" is non-NULL.
*/
static bool checkGuardedCopy(const void* dataBuf, bool modOkay)
{
static const u4 kMagicCmp = kGuardMagic;
const u1* fullBuf = ((const u1*) dataBuf) - kGuardLen / 2;
const GuardExtra* pExtra = getGuardExtra(dataBuf);
size_t len;
const u2* pat;
int i;
/*
* Before we do anything with "pExtra", check the magic number. We
* do the check with memcmp rather than "==" in case the pointer is
* unaligned. If it points to completely bogus memory we're going
* to crash, but there's no easy way around that.
*/
if (memcmp(&pExtra->magic, &kMagicCmp, 4) != 0) {
u1 buf[4];
memcpy(buf, &pExtra->magic, 4);
LOGE("JNI: guard magic does not match (found 0x%02x%02x%02x%02x) "
"-- incorrect data pointer %p?\n",
buf[3], buf[2], buf[1], buf[0], dataBuf); /* assume little endian */
return false;
}
len = pExtra->originalLen;
/* check bottom half of guard; skip over optional checksum storage */
pat = (u2*) fullBuf;
for (i = kGuardExtra / 2; i < (int) (kGuardLen / 2 - kGuardExtra) / 2; i++)
{
if (pat[i] != kGuardPattern) {
LOGE("JNI: guard pattern(1) disturbed at %p + %d\n",
fullBuf, i*2);
return false;
}
}
int offset = kGuardLen / 2 + len;
if (offset & 0x01) {
/* odd byte; expected value depends on endian-ness of host */
const u2 patSample = kGuardPattern;
if (fullBuf[offset] != ((const u1*) &patSample)[1]) {
LOGE("JNI: guard pattern disturbed in odd byte after %p "
"(+%d) 0x%02x 0x%02x\n",
fullBuf, offset, fullBuf[offset], ((const u1*) &patSample)[1]);
return false;
}
offset++;
}
/* check top half of guard */
pat = (u2*) (fullBuf + offset);
for (i = 0; i < kGuardLen / 4; i++) {
if (pat[i] != kGuardPattern) {
LOGE("JNI: guard pattern(2) disturbed at %p + %d\n",
fullBuf, offset + i*2);
return false;
}
}
/*
* If modification is not expected, verify checksum. Strictly speaking
* this is wrong: if we told the client that we made a copy, there's no
* reason they can't alter the buffer.
*/
if (!modOkay) {
uLong adler = adler32(0L, Z_NULL, 0);
adler = adler32(adler, dataBuf, len);
if (pExtra->adler != adler) {
LOGE("JNI: buffer modified (0x%08lx vs 0x%08lx) at addr %p\n",
pExtra->adler, adler, dataBuf);
return false;
}
}
return true;
}
/*
* Free up the guard buffer, scrub it, and return the original pointer.
*/
static void* freeGuardedCopy(void* dataBuf)
{
u1* fullBuf = ((u1*) dataBuf) - kGuardLen / 2;
const GuardExtra* pExtra = getGuardExtra(dataBuf);
void* originalPtr = (void*) pExtra->originalPtr;
size_t len = pExtra->originalLen;
memset(dataBuf, 0xdd, len);
free(fullBuf);
return originalPtr;
}
/*
* Just pull out the original pointer.
*/
static void* getGuardedCopyOriginalPtr(const void* dataBuf)
{
const GuardExtra* pExtra = getGuardExtra(dataBuf);
return (void*) pExtra->originalPtr;
}
/*
* Grab the data length.
*/
static size_t getGuardedCopyOriginalLen(const void* dataBuf)
{
const GuardExtra* pExtra = getGuardExtra(dataBuf);
return pExtra->originalLen;
}
/*
* Return the width, in bytes, of a primitive type.
*/
static int dvmPrimitiveTypeWidth(PrimitiveType primType)
{
static const int lengths[PRIM_MAX] = {
1, // boolean
2, // char
4, // float
8, // double
1, // byte
2, // short
4, // int
8, // long
-1, // void
};
assert(primType >= 0 && primType < PRIM_MAX);
return lengths[primType];
}
/*
* Create a guarded copy of a primitive array. Modifications to the copied
* data are allowed. Returns a pointer to the copied data.
*/
static void* createGuardedPACopy(JNIEnv* env, const jarray jarr,
jboolean* isCopy)
{
ArrayObject* arrObj = (ArrayObject*) dvmDecodeIndirectRef(env, jarr);
PrimitiveType primType = arrObj->obj.clazz->elementClass->primitiveType;
int len = arrObj->length * dvmPrimitiveTypeWidth(primType);
void* result;
result = createGuardedCopy(arrObj->contents, len, true);
if (isCopy != NULL)
*isCopy = JNI_TRUE;
return result;
}
/*
* Perform the array "release" operation, which may or may not copy data
* back into the VM, and may or may not release the underlying storage.
*/
static void* releaseGuardedPACopy(JNIEnv* env, jarray jarr, void* dataBuf,
int mode)
{
ArrayObject* arrObj = (ArrayObject*) dvmDecodeIndirectRef(env, jarr);
bool release, copyBack;
u1* result;
if (!checkGuardedCopy(dataBuf, true)) {
LOGE("JNI: failed guarded copy check in releaseGuardedPACopy\n");
abortMaybe();
return NULL;
}
switch (mode) {
case 0:
release = copyBack = true;
break;
case JNI_ABORT:
release = true;
copyBack = false;
break;
case JNI_COMMIT:
release = false;
copyBack = true;
break;
default:
LOGE("JNI: bad release mode %d\n", mode);
dvmAbort();
return NULL;
}
if (copyBack) {
size_t len = getGuardedCopyOriginalLen(dataBuf);
memcpy(arrObj->contents, dataBuf, len);
}
if (release) {
result = (u1*) freeGuardedCopy(dataBuf);
} else {
result = (u1*) getGuardedCopyOriginalPtr(dataBuf);
}
/* pointer is to the array contents; back up to the array object */
result -= offsetof(ArrayObject, contents);
return result;
}
/*
* ===========================================================================
* JNI functions
* ===========================================================================
*/
static jint Check_GetVersion(JNIEnv* env)
{
CHECK_ENTER(env, kFlag_Default);
jint result;
result = BASE_ENV(env)->GetVersion(env);
CHECK_EXIT(env);
return result;
}
static jclass Check_DefineClass(JNIEnv* env, const char* name, jobject loader,
const jbyte* buf, jsize bufLen)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, loader);
CHECK_UTF_STRING(env, name, false);
CHECK_CLASS_NAME(env, name);
jclass result;
result = BASE_ENV(env)->DefineClass(env, name, loader, buf, bufLen);
CHECK_EXIT(env);
return result;
}
static jclass Check_FindClass(JNIEnv* env, const char* name)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_UTF_STRING(env, name, false);
CHECK_CLASS_NAME(env, name);
jclass result;
result = BASE_ENV(env)->FindClass(env, name);
CHECK_EXIT(env);
return result;
}
static jclass Check_GetSuperclass(JNIEnv* env, jclass clazz)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
jclass result;
result = BASE_ENV(env)->GetSuperclass(env, clazz);
CHECK_EXIT(env);
return result;
}
static jboolean Check_IsAssignableFrom(JNIEnv* env, jclass clazz1,
jclass clazz2)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz1);
CHECK_CLASS(env, clazz2);
jboolean result;
result = BASE_ENV(env)->IsAssignableFrom(env, clazz1, clazz2);
CHECK_EXIT(env);
return result;
}
static jmethodID Check_FromReflectedMethod(JNIEnv* env, jobject method)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, method);
jmethodID result;
result = BASE_ENV(env)->FromReflectedMethod(env, method);
CHECK_EXIT(env);
return result;
}
static jfieldID Check_FromReflectedField(JNIEnv* env, jobject field)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, field);
jfieldID result;
result = BASE_ENV(env)->FromReflectedField(env, field);
CHECK_EXIT(env);
return result;
}
static jobject Check_ToReflectedMethod(JNIEnv* env, jclass cls,
jmethodID methodID, jboolean isStatic)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, cls);
jobject result;
result = BASE_ENV(env)->ToReflectedMethod(env, cls, methodID, isStatic);
CHECK_EXIT(env);
return result;
}
static jobject Check_ToReflectedField(JNIEnv* env, jclass cls, jfieldID fieldID,
jboolean isStatic)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, cls);
jobject result;
result = BASE_ENV(env)->ToReflectedField(env, cls, fieldID, isStatic);
CHECK_EXIT(env);
return result;
}
static jint Check_Throw(JNIEnv* env, jthrowable obj)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, obj);
jint result;
result = BASE_ENV(env)->Throw(env, obj);
CHECK_EXIT(env);
return result;
}
static jint Check_ThrowNew(JNIEnv* env, jclass clazz, const char* message)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
CHECK_UTF_STRING(env, message, true);
jint result;
result = BASE_ENV(env)->ThrowNew(env, clazz, message);
CHECK_EXIT(env);
return result;
}
static jthrowable Check_ExceptionOccurred(JNIEnv* env)
{
CHECK_ENTER(env, kFlag_ExcepOkay);
jthrowable result;
result = BASE_ENV(env)->ExceptionOccurred(env);
CHECK_EXIT(env);
return result;
}
static void Check_ExceptionDescribe(JNIEnv* env)
{
CHECK_ENTER(env, kFlag_ExcepOkay);
BASE_ENV(env)->ExceptionDescribe(env);
CHECK_EXIT(env);
}
static void Check_ExceptionClear(JNIEnv* env)
{
CHECK_ENTER(env, kFlag_ExcepOkay);
BASE_ENV(env)->ExceptionClear(env);
CHECK_EXIT(env);
}
static void Check_FatalError(JNIEnv* env, const char* msg)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_UTF_STRING(env, msg, true);
BASE_ENV(env)->FatalError(env, msg);
CHECK_EXIT(env);
}
static jint Check_PushLocalFrame(JNIEnv* env, jint capacity)
{
CHECK_ENTER(env, kFlag_Default | kFlag_ExcepOkay);
jint result;
result = BASE_ENV(env)->PushLocalFrame(env, capacity);
CHECK_EXIT(env);
return result;
}
static jobject Check_PopLocalFrame(JNIEnv* env, jobject res)
{
CHECK_ENTER(env, kFlag_Default | kFlag_ExcepOkay);
CHECK_OBJECT(env, res);
jobject result;
result = BASE_ENV(env)->PopLocalFrame(env, res);
CHECK_EXIT(env);
return result;
}
static jobject Check_NewGlobalRef(JNIEnv* env, jobject obj)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, obj);
jobject result;
result = BASE_ENV(env)->NewGlobalRef(env, obj);
CHECK_EXIT(env);
return result;
}
static void Check_DeleteGlobalRef(JNIEnv* env, jobject globalRef)
{
CHECK_ENTER(env, kFlag_Default | kFlag_ExcepOkay);
CHECK_OBJECT(env, globalRef);
#ifdef USE_INDIRECT_REF
if (globalRef != NULL &&
dvmGetJNIRefType(env, globalRef) != JNIGlobalRefType)
{
LOGW("JNI WARNING: DeleteGlobalRef on non-global %p (type=%d)\n",
globalRef, dvmGetJNIRefType(env, globalRef));
abortMaybe();
} else
#endif
{
BASE_ENV(env)->DeleteGlobalRef(env, globalRef);
}
CHECK_EXIT(env);
}
static jobject Check_NewLocalRef(JNIEnv* env, jobject ref)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, ref);
jobject result;
result = BASE_ENV(env)->NewLocalRef(env, ref);
CHECK_EXIT(env);
return result;
}
static void Check_DeleteLocalRef(JNIEnv* env, jobject localRef)
{
CHECK_ENTER(env, kFlag_Default | kFlag_ExcepOkay);
CHECK_OBJECT(env, localRef);
#ifdef USE_INDIRECT_REF
if (localRef != NULL &&
dvmGetJNIRefType(env, localRef) != JNILocalRefType)
{
LOGW("JNI WARNING: DeleteLocalRef on non-local %p (type=%d)\n",
localRef, dvmGetJNIRefType(env, localRef));
abortMaybe();
} else
#endif
{
BASE_ENV(env)->DeleteLocalRef(env, localRef);
}
CHECK_EXIT(env);
}
static jint Check_EnsureLocalCapacity(JNIEnv *env, jint capacity)
{
CHECK_ENTER(env, kFlag_Default);
jint result;
result = BASE_ENV(env)->EnsureLocalCapacity(env, capacity);
CHECK_EXIT(env);
return result;
}
static jboolean Check_IsSameObject(JNIEnv* env, jobject ref1, jobject ref2)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, ref1);
CHECK_OBJECT(env, ref2);
jboolean result;
result = BASE_ENV(env)->IsSameObject(env, ref1, ref2);
CHECK_EXIT(env);
return result;
}
static jobject Check_AllocObject(JNIEnv* env, jclass clazz)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
jobject result;
result = BASE_ENV(env)->AllocObject(env, clazz);
CHECK_EXIT(env);
return result;
}
static jobject Check_NewObject(JNIEnv* env, jclass clazz, jmethodID methodID,
...)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
jobject result;
va_list args, tmpArgs;
va_start(args, methodID);
va_copy(tmpArgs, args);
CHECK_METHOD_ARGS_V(env, methodID, tmpArgs);
va_end(tmpArgs);
result = BASE_ENV(env)->NewObjectV(env, clazz, methodID, args);
va_end(args);
CHECK_EXIT(env);
return result;
}
static jobject Check_NewObjectV(JNIEnv* env, jclass clazz, jmethodID methodID,
va_list args)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
jobject result;
va_list tmpArgs;
va_copy(tmpArgs, args);
CHECK_METHOD_ARGS_V(env, methodID, tmpArgs);
va_end(tmpArgs);
result = BASE_ENV(env)->NewObjectV(env, clazz, methodID, args);
CHECK_EXIT(env);
return result;
}
static jobject Check_NewObjectA(JNIEnv* env, jclass clazz, jmethodID methodID,
jvalue* args)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
jobject result;
CHECK_METHOD_ARGS_A(env, methodID, args);
result = BASE_ENV(env)->NewObjectA(env, clazz, methodID, args);
CHECK_EXIT(env);
return result;
}
static jclass Check_GetObjectClass(JNIEnv* env, jobject obj)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, obj);
jclass result;
result = BASE_ENV(env)->GetObjectClass(env, obj);
CHECK_EXIT(env);
return result;
}
static jboolean Check_IsInstanceOf(JNIEnv* env, jobject obj, jclass clazz)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, obj);
CHECK_CLASS(env, clazz);
jboolean result;
result = BASE_ENV(env)->IsInstanceOf(env, obj, clazz);
CHECK_EXIT(env);
return result;
}
static jmethodID Check_GetMethodID(JNIEnv* env, jclass clazz, const char* name,
const char* sig)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
CHECK_UTF_STRING(env, name, false);
CHECK_UTF_STRING(env, sig, false);
jmethodID result;
result = BASE_ENV(env)->GetMethodID(env, clazz, name, sig);
CHECK_EXIT(env);
return result;
}
static jfieldID Check_GetFieldID(JNIEnv* env, jclass clazz,
const char* name, const char* sig)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
CHECK_UTF_STRING(env, name, false);
CHECK_UTF_STRING(env, sig, false);
jfieldID result;
result = BASE_ENV(env)->GetFieldID(env, clazz, name, sig);
CHECK_EXIT(env);
return result;
}
static jmethodID Check_GetStaticMethodID(JNIEnv* env, jclass clazz,
const char* name, const char* sig)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
CHECK_UTF_STRING(env, name, false);
CHECK_UTF_STRING(env, sig, false);
jmethodID result;
result = BASE_ENV(env)->GetStaticMethodID(env, clazz, name, sig);
CHECK_EXIT(env);
return result;
}
static jfieldID Check_GetStaticFieldID(JNIEnv* env, jclass clazz,
const char* name, const char* sig)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
CHECK_UTF_STRING(env, name, false);
CHECK_UTF_STRING(env, sig, false);
jfieldID result;
result = BASE_ENV(env)->GetStaticFieldID(env, clazz, name, sig);
CHECK_EXIT(env);
return result;
}
#define GET_STATIC_TYPE_FIELD(_ctype, _jname) \
static _ctype Check_GetStatic##_jname##Field(JNIEnv* env, jclass clazz, \
jfieldID fieldID) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_CLASS(env, clazz); \
_ctype result; \
checkStaticFieldID(env, clazz, fieldID); \
result = BASE_ENV(env)->GetStatic##_jname##Field(env, clazz, \
fieldID); \
CHECK_EXIT(env); \
return result; \
}
GET_STATIC_TYPE_FIELD(jobject, Object);
GET_STATIC_TYPE_FIELD(jboolean, Boolean);
GET_STATIC_TYPE_FIELD(jbyte, Byte);
GET_STATIC_TYPE_FIELD(jchar, Char);
GET_STATIC_TYPE_FIELD(jshort, Short);
GET_STATIC_TYPE_FIELD(jint, Int);
GET_STATIC_TYPE_FIELD(jlong, Long);
GET_STATIC_TYPE_FIELD(jfloat, Float);
GET_STATIC_TYPE_FIELD(jdouble, Double);
#define SET_STATIC_TYPE_FIELD(_ctype, _jname, _ftype) \
static void Check_SetStatic##_jname##Field(JNIEnv* env, jclass clazz, \
jfieldID fieldID, _ctype value) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_CLASS(env, clazz); \
checkStaticFieldID(env, clazz, fieldID); \
/* "value" arg only used when type == ref */ \
CHECK_FIELD_TYPE(env, (jobject)(u4)value, fieldID, _ftype, true); \
BASE_ENV(env)->SetStatic##_jname##Field(env, clazz, fieldID, \
value); \
CHECK_EXIT(env); \
}
SET_STATIC_TYPE_FIELD(jobject, Object, PRIM_NOT);
SET_STATIC_TYPE_FIELD(jboolean, Boolean, PRIM_BOOLEAN);
SET_STATIC_TYPE_FIELD(jbyte, Byte, PRIM_BYTE);
SET_STATIC_TYPE_FIELD(jchar, Char, PRIM_CHAR);
SET_STATIC_TYPE_FIELD(jshort, Short, PRIM_SHORT);
SET_STATIC_TYPE_FIELD(jint, Int, PRIM_INT);
SET_STATIC_TYPE_FIELD(jlong, Long, PRIM_LONG);
SET_STATIC_TYPE_FIELD(jfloat, Float, PRIM_FLOAT);
SET_STATIC_TYPE_FIELD(jdouble, Double, PRIM_DOUBLE);
#define GET_TYPE_FIELD(_ctype, _jname) \
static _ctype Check_Get##_jname##Field(JNIEnv* env, jobject obj, \
jfieldID fieldID) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_OBJECT(env, obj); \
_ctype result; \
CHECK_INST_FIELD_ID(env, obj, fieldID); \
result = BASE_ENV(env)->Get##_jname##Field(env, obj, fieldID); \
CHECK_EXIT(env); \
return result; \
}
GET_TYPE_FIELD(jobject, Object);
GET_TYPE_FIELD(jboolean, Boolean);
GET_TYPE_FIELD(jbyte, Byte);
GET_TYPE_FIELD(jchar, Char);
GET_TYPE_FIELD(jshort, Short);
GET_TYPE_FIELD(jint, Int);
GET_TYPE_FIELD(jlong, Long);
GET_TYPE_FIELD(jfloat, Float);
GET_TYPE_FIELD(jdouble, Double);
#define SET_TYPE_FIELD(_ctype, _jname, _ftype) \
static void Check_Set##_jname##Field(JNIEnv* env, jobject obj, \
jfieldID fieldID, _ctype value) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_OBJECT(env, obj); \
CHECK_INST_FIELD_ID(env, obj, fieldID); \
/* "value" arg only used when type == ref */ \
CHECK_FIELD_TYPE(env, (jobject)(u4) value, fieldID, _ftype, false); \
BASE_ENV(env)->Set##_jname##Field(env, obj, fieldID, value); \
CHECK_EXIT(env); \
}
SET_TYPE_FIELD(jobject, Object, PRIM_NOT);
SET_TYPE_FIELD(jboolean, Boolean, PRIM_BOOLEAN);
SET_TYPE_FIELD(jbyte, Byte, PRIM_BYTE);
SET_TYPE_FIELD(jchar, Char, PRIM_CHAR);
SET_TYPE_FIELD(jshort, Short, PRIM_SHORT);
SET_TYPE_FIELD(jint, Int, PRIM_INT);
SET_TYPE_FIELD(jlong, Long, PRIM_LONG);
SET_TYPE_FIELD(jfloat, Float, PRIM_FLOAT);
SET_TYPE_FIELD(jdouble, Double, PRIM_DOUBLE);
#define CALL_VIRTUAL(_ctype, _jname, _retdecl, _retasgn, _retok, _retsig) \
static _ctype Check_Call##_jname##Method(JNIEnv* env, jobject obj, \
jmethodID methodID, ...) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_OBJECT(env, obj); \
CHECK_SIG(env, methodID, _retsig, false); \
CHECK_VIRTUAL_METHOD(env, obj, methodID); \
_retdecl; \
va_list args, tmpArgs; \
va_start(args, methodID); \
va_copy(tmpArgs, args); \
CHECK_METHOD_ARGS_V(env, methodID, tmpArgs); \
va_end(tmpArgs); \
_retasgn BASE_ENV(env)->Call##_jname##MethodV(env, obj, methodID, \
args); \
va_end(args); \
CHECK_EXIT(env); \
return _retok; \
} \
static _ctype Check_Call##_jname##MethodV(JNIEnv* env, jobject obj, \
jmethodID methodID, va_list args) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_OBJECT(env, obj); \
CHECK_SIG(env, methodID, _retsig, false); \
CHECK_VIRTUAL_METHOD(env, obj, methodID); \
_retdecl; \
va_list tmpArgs; \
va_copy(tmpArgs, args); \
CHECK_METHOD_ARGS_V(env, methodID, tmpArgs); \
va_end(tmpArgs); \
_retasgn BASE_ENV(env)->Call##_jname##MethodV(env, obj, methodID, \
args); \
CHECK_EXIT(env); \
return _retok; \
} \
static _ctype Check_Call##_jname##MethodA(JNIEnv* env, jobject obj, \
jmethodID methodID, jvalue* args) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_OBJECT(env, obj); \
CHECK_SIG(env, methodID, _retsig, false); \
CHECK_VIRTUAL_METHOD(env, obj, methodID); \
_retdecl; \
CHECK_METHOD_ARGS_A(env, methodID, args); \
_retasgn BASE_ENV(env)->Call##_jname##MethodA(env, obj, methodID, \
args); \
CHECK_EXIT(env); \
return _retok; \
}
CALL_VIRTUAL(jobject, Object, Object* result, result=, result, 'L');
CALL_VIRTUAL(jboolean, Boolean, jboolean result, result=, result, 'Z');
CALL_VIRTUAL(jbyte, Byte, jbyte result, result=, result, 'B');
CALL_VIRTUAL(jchar, Char, jchar result, result=, result, 'C');
CALL_VIRTUAL(jshort, Short, jshort result, result=, result, 'S');
CALL_VIRTUAL(jint, Int, jint result, result=, result, 'I');
CALL_VIRTUAL(jlong, Long, jlong result, result=, result, 'J');
CALL_VIRTUAL(jfloat, Float, jfloat result, result=, result, 'F');
CALL_VIRTUAL(jdouble, Double, jdouble result, result=, result, 'D');
CALL_VIRTUAL(void, Void, , , , 'V');
#define CALL_NONVIRTUAL(_ctype, _jname, _retdecl, _retasgn, _retok, \
_retsig) \
static _ctype Check_CallNonvirtual##_jname##Method(JNIEnv* env, \
jobject obj, jclass clazz, jmethodID methodID, ...) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_CLASS(env, clazz); \
CHECK_OBJECT(env, obj); \
CHECK_SIG(env, methodID, _retsig, false); \
CHECK_VIRTUAL_METHOD(env, obj, methodID); \
_retdecl; \
va_list args, tmpArgs; \
va_start(args, methodID); \
va_copy(tmpArgs, args); \
CHECK_METHOD_ARGS_V(env, methodID, tmpArgs); \
va_end(tmpArgs); \
_retasgn BASE_ENV(env)->CallNonvirtual##_jname##MethodV(env, obj, \
clazz, methodID, args); \
va_end(args); \
CHECK_EXIT(env); \
return _retok; \
} \
static _ctype Check_CallNonvirtual##_jname##MethodV(JNIEnv* env, \
jobject obj, jclass clazz, jmethodID methodID, va_list args) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_CLASS(env, clazz); \
CHECK_OBJECT(env, obj); \
CHECK_SIG(env, methodID, _retsig, false); \
CHECK_VIRTUAL_METHOD(env, obj, methodID); \
_retdecl; \
va_list tmpArgs; \
va_copy(tmpArgs, args); \
CHECK_METHOD_ARGS_V(env, methodID, tmpArgs); \
va_end(tmpArgs); \
_retasgn BASE_ENV(env)->CallNonvirtual##_jname##MethodV(env, obj, \
clazz, methodID, args); \
CHECK_EXIT(env); \
return _retok; \
} \
static _ctype Check_CallNonvirtual##_jname##MethodA(JNIEnv* env, \
jobject obj, jclass clazz, jmethodID methodID, jvalue* args) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_CLASS(env, clazz); \
CHECK_OBJECT(env, obj); \
CHECK_SIG(env, methodID, _retsig, false); \
CHECK_VIRTUAL_METHOD(env, obj, methodID); \
_retdecl; \
CHECK_METHOD_ARGS_A(env, methodID, args); \
_retasgn BASE_ENV(env)->CallNonvirtual##_jname##MethodA(env, obj, \
clazz, methodID, args); \
CHECK_EXIT(env); \
return _retok; \
}
CALL_NONVIRTUAL(jobject, Object, Object* result, result=, result, 'L');
CALL_NONVIRTUAL(jboolean, Boolean, jboolean result, result=, result, 'Z');
CALL_NONVIRTUAL(jbyte, Byte, jbyte result, result=, result, 'B');
CALL_NONVIRTUAL(jchar, Char, jchar result, result=, result, 'C');
CALL_NONVIRTUAL(jshort, Short, jshort result, result=, result, 'S');
CALL_NONVIRTUAL(jint, Int, jint result, result=, result, 'I');
CALL_NONVIRTUAL(jlong, Long, jlong result, result=, result, 'J');
CALL_NONVIRTUAL(jfloat, Float, jfloat result, result=, result, 'F');
CALL_NONVIRTUAL(jdouble, Double, jdouble result, result=, result, 'D');
CALL_NONVIRTUAL(void, Void, , , , 'V');
#define CALL_STATIC(_ctype, _jname, _retdecl, _retasgn, _retok, _retsig) \
static _ctype Check_CallStatic##_jname##Method(JNIEnv* env, \
jclass clazz, jmethodID methodID, ...) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_CLASS(env, clazz); \
CHECK_SIG(env, methodID, _retsig, true); \
CHECK_STATIC_METHOD(env, clazz, methodID); \
_retdecl; \
va_list args, tmpArgs; \
va_start(args, methodID); \
va_copy(tmpArgs, args); \
CHECK_METHOD_ARGS_V(env, methodID, tmpArgs); \
va_end(tmpArgs); \
_retasgn BASE_ENV(env)->CallStatic##_jname##MethodV(env, clazz, \
methodID, args); \
va_end(args); \
CHECK_EXIT(env); \
return _retok; \
} \
static _ctype Check_CallStatic##_jname##MethodV(JNIEnv* env, \
jclass clazz, jmethodID methodID, va_list args) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_CLASS(env, clazz); \
CHECK_SIG(env, methodID, _retsig, true); \
CHECK_STATIC_METHOD(env, clazz, methodID); \
_retdecl; \
va_list tmpArgs; \
va_copy(tmpArgs, args); \
CHECK_METHOD_ARGS_V(env, methodID, tmpArgs); \
va_end(tmpArgs); \
_retasgn BASE_ENV(env)->CallStatic##_jname##MethodV(env, clazz, \
methodID, args); \
CHECK_EXIT(env); \
return _retok; \
} \
static _ctype Check_CallStatic##_jname##MethodA(JNIEnv* env, \
jclass clazz, jmethodID methodID, jvalue* args) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_CLASS(env, clazz); \
CHECK_SIG(env, methodID, _retsig, true); \
CHECK_STATIC_METHOD(env, clazz, methodID); \
_retdecl; \
CHECK_METHOD_ARGS_A(env, methodID, args); \
_retasgn BASE_ENV(env)->CallStatic##_jname##MethodA(env, clazz, \
methodID, args); \
CHECK_EXIT(env); \
return _retok; \
}
CALL_STATIC(jobject, Object, Object* result, result=, result, 'L');
CALL_STATIC(jboolean, Boolean, jboolean result, result=, result, 'Z');
CALL_STATIC(jbyte, Byte, jbyte result, result=, result, 'B');
CALL_STATIC(jchar, Char, jchar result, result=, result, 'C');
CALL_STATIC(jshort, Short, jshort result, result=, result, 'S');
CALL_STATIC(jint, Int, jint result, result=, result, 'I');
CALL_STATIC(jlong, Long, jlong result, result=, result, 'J');
CALL_STATIC(jfloat, Float, jfloat result, result=, result, 'F');
CALL_STATIC(jdouble, Double, jdouble result, result=, result, 'D');
CALL_STATIC(void, Void, , , , 'V');
static jstring Check_NewString(JNIEnv* env, const jchar* unicodeChars,
jsize len)
{
CHECK_ENTER(env, kFlag_Default);
jstring result;
result = BASE_ENV(env)->NewString(env, unicodeChars, len);
CHECK_EXIT(env);
return result;
}
static jsize Check_GetStringLength(JNIEnv* env, jstring string)
{
CHECK_ENTER(env, kFlag_CritOkay);
CHECK_STRING(env, string);
jsize result;
result = BASE_ENV(env)->GetStringLength(env, string);
CHECK_EXIT(env);
return result;
}
static const jchar* Check_GetStringChars(JNIEnv* env, jstring string,
jboolean* isCopy)
{
CHECK_ENTER(env, kFlag_CritOkay);
CHECK_STRING(env, string);
const jchar* result;
result = BASE_ENV(env)->GetStringChars(env, string, isCopy);
if (((JNIEnvExt*)env)->forceDataCopy && result != NULL) {
// TODO: fix for indirect
int len = dvmStringLen(string) * 2;
result = (const jchar*) createGuardedCopy(result, len, false);
if (isCopy != NULL)
*isCopy = JNI_TRUE;
}
CHECK_EXIT(env);
return result;
}
static void Check_ReleaseStringChars(JNIEnv* env, jstring string,
const jchar* chars)
{
CHECK_ENTER(env, kFlag_Default | kFlag_ExcepOkay);
CHECK_STRING(env, string);
CHECK_NON_NULL(env, chars);
if (((JNIEnvExt*)env)->forceDataCopy) {
if (!checkGuardedCopy(chars, false)) {
LOGE("JNI: failed guarded copy check in ReleaseStringChars\n");
abortMaybe();
return;
}
chars = (const jchar*) freeGuardedCopy((jchar*)chars);
}
BASE_ENV(env)->ReleaseStringChars(env, string, chars);
CHECK_EXIT(env);
}
static jstring Check_NewStringUTF(JNIEnv* env, const char* bytes)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_UTF_STRING(env, bytes, true);
jstring result;
result = BASE_ENV(env)->NewStringUTF(env, bytes);
CHECK_EXIT(env);
return result;
}
static jsize Check_GetStringUTFLength(JNIEnv* env, jstring string)
{
CHECK_ENTER(env, kFlag_CritOkay);
CHECK_STRING(env, string);
jsize result;
result = BASE_ENV(env)->GetStringUTFLength(env, string);
CHECK_EXIT(env);
return result;
}
static const char* Check_GetStringUTFChars(JNIEnv* env, jstring string,
jboolean* isCopy)
{
CHECK_ENTER(env, kFlag_CritOkay);
CHECK_STRING(env, string);
const char* result;
result = BASE_ENV(env)->GetStringUTFChars(env, string, isCopy);
if (((JNIEnvExt*)env)->forceDataCopy && result != NULL) {
// TODO: fix for indirect
int len = dvmStringUtf8ByteLen(string) + 1;
result = (const char*) createGuardedCopy(result, len, false);
if (isCopy != NULL)
*isCopy = JNI_TRUE;
}
CHECK_EXIT(env);
return result;
}
static void Check_ReleaseStringUTFChars(JNIEnv* env, jstring string,
const char* utf)
{
CHECK_ENTER(env, kFlag_ExcepOkay);
CHECK_STRING(env, string);
CHECK_NON_NULL(env, utf);
if (((JNIEnvExt*)env)->forceDataCopy) {
//int len = dvmStringUtf8ByteLen(string) + 1;
if (!checkGuardedCopy(utf, false)) {
LOGE("JNI: failed guarded copy check in ReleaseStringUTFChars\n");
abortMaybe();
return;
}
utf = (const char*) freeGuardedCopy((char*)utf);
}
BASE_ENV(env)->ReleaseStringUTFChars(env, string, utf);
CHECK_EXIT(env);
}
static jsize Check_GetArrayLength(JNIEnv* env, jarray array)
{
CHECK_ENTER(env, kFlag_CritOkay);
CHECK_ARRAY(env, array);
jsize result;
result = BASE_ENV(env)->GetArrayLength(env, array);
CHECK_EXIT(env);
return result;
}
static jobjectArray Check_NewObjectArray(JNIEnv* env, jsize length,
jclass elementClass, jobject initialElement)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, elementClass);
CHECK_OBJECT(env, initialElement);
CHECK_LENGTH_POSITIVE(env, length);
jobjectArray result;
result = BASE_ENV(env)->NewObjectArray(env, length, elementClass,
initialElement);
CHECK_EXIT(env);
return result;
}
static jobject Check_GetObjectArrayElement(JNIEnv* env, jobjectArray array,
jsize index)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_ARRAY(env, array);
jobject result;
result = BASE_ENV(env)->GetObjectArrayElement(env, array, index);
CHECK_EXIT(env);
return result;
}
static void Check_SetObjectArrayElement(JNIEnv* env, jobjectArray array,
jsize index, jobject value)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_ARRAY(env, array);
BASE_ENV(env)->SetObjectArrayElement(env, array, index, value);
CHECK_EXIT(env);
}
#define NEW_PRIMITIVE_ARRAY(_artype, _jname) \
static _artype Check_New##_jname##Array(JNIEnv* env, jsize length) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_LENGTH_POSITIVE(env, length); \
_artype result; \
result = BASE_ENV(env)->New##_jname##Array(env, length); \
CHECK_EXIT(env); \
return result; \
}
NEW_PRIMITIVE_ARRAY(jbooleanArray, Boolean);
NEW_PRIMITIVE_ARRAY(jbyteArray, Byte);
NEW_PRIMITIVE_ARRAY(jcharArray, Char);
NEW_PRIMITIVE_ARRAY(jshortArray, Short);
NEW_PRIMITIVE_ARRAY(jintArray, Int);
NEW_PRIMITIVE_ARRAY(jlongArray, Long);
NEW_PRIMITIVE_ARRAY(jfloatArray, Float);
NEW_PRIMITIVE_ARRAY(jdoubleArray, Double);
#define GET_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname) \
static _ctype* Check_Get##_jname##ArrayElements(JNIEnv* env, \
_ctype##Array array, jboolean* isCopy) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_ARRAY(env, array); \
_ctype* result; \
result = BASE_ENV(env)->Get##_jname##ArrayElements(env, \
array, isCopy); \
if (((JNIEnvExt*)env)->forceDataCopy && result != NULL) { \
result = (_ctype*) createGuardedPACopy(env, array, isCopy); \
} \
CHECK_EXIT(env); \
return result; \
}
#define RELEASE_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname) \
static void Check_Release##_jname##ArrayElements(JNIEnv* env, \
_ctype##Array array, _ctype* elems, jint mode) \
{ \
CHECK_ENTER(env, kFlag_Default | kFlag_ExcepOkay); \
CHECK_ARRAY(env, array); \
CHECK_NON_NULL(env, elems); \
CHECK_RELEASE_MODE(env, mode); \
if (((JNIEnvExt*)env)->forceDataCopy) { \
elems = (_ctype*) releaseGuardedPACopy(env, array, elems, mode);\
} \
BASE_ENV(env)->Release##_jname##ArrayElements(env, \
array, elems, mode); \
CHECK_EXIT(env); \
}
#define GET_PRIMITIVE_ARRAY_REGION(_ctype, _jname) \
static void Check_Get##_jname##ArrayRegion(JNIEnv* env, \
_ctype##Array array, jsize start, jsize len, _ctype* buf) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_ARRAY(env, array); \
BASE_ENV(env)->Get##_jname##ArrayRegion(env, array, start, \
len, buf); \
CHECK_EXIT(env); \
}
#define SET_PRIMITIVE_ARRAY_REGION(_ctype, _jname) \
static void Check_Set##_jname##ArrayRegion(JNIEnv* env, \
_ctype##Array array, jsize start, jsize len, const _ctype* buf) \
{ \
CHECK_ENTER(env, kFlag_Default); \
CHECK_ARRAY(env, array); \
BASE_ENV(env)->Set##_jname##ArrayRegion(env, array, start, \
len, buf); \
CHECK_EXIT(env); \
}
#define PRIMITIVE_ARRAY_FUNCTIONS(_ctype, _jname, _typechar) \
GET_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname); \
RELEASE_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname); \
GET_PRIMITIVE_ARRAY_REGION(_ctype, _jname); \
SET_PRIMITIVE_ARRAY_REGION(_ctype, _jname);
/* TODO: verify primitive array type matches call type */
PRIMITIVE_ARRAY_FUNCTIONS(jboolean, Boolean, 'Z');
PRIMITIVE_ARRAY_FUNCTIONS(jbyte, Byte, 'B');
PRIMITIVE_ARRAY_FUNCTIONS(jchar, Char, 'C');
PRIMITIVE_ARRAY_FUNCTIONS(jshort, Short, 'S');
PRIMITIVE_ARRAY_FUNCTIONS(jint, Int, 'I');
PRIMITIVE_ARRAY_FUNCTIONS(jlong, Long, 'J');
PRIMITIVE_ARRAY_FUNCTIONS(jfloat, Float, 'F');
PRIMITIVE_ARRAY_FUNCTIONS(jdouble, Double, 'D');
static jint Check_RegisterNatives(JNIEnv* env, jclass clazz,
const JNINativeMethod* methods, jint nMethods)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
jint result;
result = BASE_ENV(env)->RegisterNatives(env, clazz, methods, nMethods);
CHECK_EXIT(env);
return result;
}
static jint Check_UnregisterNatives(JNIEnv* env, jclass clazz)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_CLASS(env, clazz);
jint result;
result = BASE_ENV(env)->UnregisterNatives(env, clazz);
CHECK_EXIT(env);
return result;
}
static jint Check_MonitorEnter(JNIEnv* env, jobject obj)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, obj);
jint result;
result = BASE_ENV(env)->MonitorEnter(env, obj);
CHECK_EXIT(env);
return result;
}
static jint Check_MonitorExit(JNIEnv* env, jobject obj)
{
CHECK_ENTER(env, kFlag_Default | kFlag_ExcepOkay);
CHECK_OBJECT(env, obj);
jint result;
result = BASE_ENV(env)->MonitorExit(env, obj);
CHECK_EXIT(env);
return result;
}
static jint Check_GetJavaVM(JNIEnv *env, JavaVM **vm)
{
CHECK_ENTER(env, kFlag_Default);
jint result;
result = BASE_ENV(env)->GetJavaVM(env, vm);
CHECK_EXIT(env);
return result;
}
static void Check_GetStringRegion(JNIEnv* env, jstring str, jsize start,
jsize len, jchar* buf)
{
CHECK_ENTER(env, kFlag_CritOkay);
CHECK_STRING(env, str);
BASE_ENV(env)->GetStringRegion(env, str, start, len, buf);
CHECK_EXIT(env);
}
static void Check_GetStringUTFRegion(JNIEnv* env, jstring str, jsize start,
jsize len, char* buf)
{
CHECK_ENTER(env, kFlag_CritOkay);
CHECK_STRING(env, str);
BASE_ENV(env)->GetStringUTFRegion(env, str, start, len, buf);
CHECK_EXIT(env);
}
static void* Check_GetPrimitiveArrayCritical(JNIEnv* env, jarray array,
jboolean* isCopy)
{
CHECK_ENTER(env, kFlag_CritGet);
CHECK_ARRAY(env, array);
void* result;
result = BASE_ENV(env)->GetPrimitiveArrayCritical(env, array, isCopy);
if (((JNIEnvExt*)env)->forceDataCopy && result != NULL) {
result = createGuardedPACopy(env, array, isCopy);
}
CHECK_EXIT(env);
return result;
}
static void Check_ReleasePrimitiveArrayCritical(JNIEnv* env, jarray array,
void* carray, jint mode)
{
CHECK_ENTER(env, kFlag_CritRelease | kFlag_ExcepOkay);
CHECK_ARRAY(env, array);
CHECK_NON_NULL(env, carray);
CHECK_RELEASE_MODE(env, mode);
if (((JNIEnvExt*)env)->forceDataCopy) {
carray = releaseGuardedPACopy(env, array, carray, mode);
}
BASE_ENV(env)->ReleasePrimitiveArrayCritical(env, array, carray, mode);
CHECK_EXIT(env);
}
static const jchar* Check_GetStringCritical(JNIEnv* env, jstring string,
jboolean* isCopy)
{
CHECK_ENTER(env, kFlag_CritGet);
CHECK_STRING(env, string);
const jchar* result;
result = BASE_ENV(env)->GetStringCritical(env, string, isCopy);
if (((JNIEnvExt*)env)->forceDataCopy && result != NULL) {
// TODO: fix for indirect
int len = dvmStringLen(string) * 2;
result = (const jchar*) createGuardedCopy(result, len, false);
if (isCopy != NULL)
*isCopy = JNI_TRUE;
}
CHECK_EXIT(env);
return result;
}
static void Check_ReleaseStringCritical(JNIEnv* env, jstring string,
const jchar* carray)
{
CHECK_ENTER(env, kFlag_CritRelease | kFlag_ExcepOkay);
CHECK_STRING(env, string);
CHECK_NON_NULL(env, carray);
if (((JNIEnvExt*)env)->forceDataCopy) {
if (!checkGuardedCopy(carray, false)) {
LOGE("JNI: failed guarded copy check in ReleaseStringCritical\n");
abortMaybe();
return;
}
carray = (const jchar*) freeGuardedCopy((jchar*)carray);
}
BASE_ENV(env)->ReleaseStringCritical(env, string, carray);
CHECK_EXIT(env);
}
static jweak Check_NewWeakGlobalRef(JNIEnv* env, jobject obj)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, obj);
jweak result;
result = BASE_ENV(env)->NewWeakGlobalRef(env, obj);
CHECK_EXIT(env);
return result;
}
static void Check_DeleteWeakGlobalRef(JNIEnv* env, jweak obj)
{
CHECK_ENTER(env, kFlag_Default | kFlag_ExcepOkay);
CHECK_OBJECT(env, obj);
BASE_ENV(env)->DeleteWeakGlobalRef(env, obj);
CHECK_EXIT(env);
}
static jboolean Check_ExceptionCheck(JNIEnv* env)
{
CHECK_ENTER(env, kFlag_CritOkay | kFlag_ExcepOkay);
jboolean result;
result = BASE_ENV(env)->ExceptionCheck(env);
CHECK_EXIT(env);
return result;
}
static jobjectRefType Check_GetObjectRefType(JNIEnv* env, jobject obj)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, obj);
jobjectRefType result;
result = BASE_ENV(env)->GetObjectRefType(env, obj);
CHECK_EXIT(env);
return result;
}
static jobject Check_NewDirectByteBuffer(JNIEnv* env, void* address,
jlong capacity)
{
CHECK_ENTER(env, kFlag_Default);
jobject result;
if (address == NULL || capacity < 0) {
LOGW("JNI WARNING: invalid values for address (%p) or capacity (%ld)\n",
address, (long) capacity);
abortMaybe();
return NULL;
}
result = BASE_ENV(env)->NewDirectByteBuffer(env, address, capacity);
CHECK_EXIT(env);
return result;
}
static void* Check_GetDirectBufferAddress(JNIEnv* env, jobject buf)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, buf);
void* result = BASE_ENV(env)->GetDirectBufferAddress(env, buf);
CHECK_EXIT(env);
/* optional - check result vs. "safe" implementation */
if (kRedundantDirectBufferTest) {
jobject platformAddr = NULL;
void* checkResult = NULL;
/*
* Start by determining if the object supports the DirectBuffer
* interfaces. Note this does not guarantee that it's a direct buffer.
*/
if (JNI_FALSE == (*env)->IsInstanceOf(env, buf,
gDvm.jclassOrgApacheHarmonyNioInternalDirectBuffer))
{
goto bail;
}
/*
* Get the PlatformAddress object.
*
* If this isn't a direct buffer, platformAddr will be NULL and/or an
* exception will have been thrown.
*/
platformAddr = (*env)->CallObjectMethod(env, buf,
(jmethodID) gDvm.methOrgApacheHarmonyNioInternalDirectBuffer_getEffectiveAddress);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionClear(env);
platformAddr = NULL;
}
if (platformAddr == NULL) {
LOGV("Got request for address of non-direct buffer\n");
goto bail;
}
jclass platformAddrClass = (*env)->FindClass(env,
"org/apache/harmony/luni/platform/PlatformAddress");
jmethodID toLongMethod = (*env)->GetMethodID(env, platformAddrClass,
"toLong", "()J");
checkResult = (void*)(u4)(*env)->CallLongMethod(env, platformAddr,
toLongMethod);
bail:
if (platformAddr != NULL)
(*env)->DeleteLocalRef(env, platformAddr);
if (result != checkResult) {
LOGW("JNI WARNING: direct buffer result mismatch (%p vs %p)\n",
result, checkResult);
abortMaybe();
/* keep going */
}
}
return result;
}
static jlong Check_GetDirectBufferCapacity(JNIEnv* env, jobject buf)
{
CHECK_ENTER(env, kFlag_Default);
CHECK_OBJECT(env, buf);
/* TODO: verify "buf" is an instance of java.nio.Buffer */
jlong result = BASE_ENV(env)->GetDirectBufferCapacity(env, buf);
CHECK_EXIT(env);
return result;
}
/*
* ===========================================================================
* JNI invocation functions
* ===========================================================================
*/
static jint Check_DestroyJavaVM(JavaVM* vm)
{
CHECK_VMENTER(vm, false);
jint result;
result = BASE_VM(vm)->DestroyJavaVM(vm);
CHECK_VMEXIT(vm, false);
return result;
}
static jint Check_AttachCurrentThread(JavaVM* vm, JNIEnv** p_env,
void* thr_args)
{
CHECK_VMENTER(vm, false);
jint result;
result = BASE_VM(vm)->AttachCurrentThread(vm, p_env, thr_args);
CHECK_VMEXIT(vm, true);
return result;
}
static jint Check_AttachCurrentThreadAsDaemon(JavaVM* vm, JNIEnv** p_env,
void* thr_args)
{
CHECK_VMENTER(vm, false);
jint result;
result = BASE_VM(vm)->AttachCurrentThreadAsDaemon(vm, p_env, thr_args);
CHECK_VMEXIT(vm, true);
return result;
}
static jint Check_DetachCurrentThread(JavaVM* vm)
{
CHECK_VMENTER(vm, true);
jint result;
result = BASE_VM(vm)->DetachCurrentThread(vm);
CHECK_VMEXIT(vm, false);
return result;
}
static jint Check_GetEnv(JavaVM* vm, void** env, jint version)
{
CHECK_VMENTER(vm, true);
jint result;
result = BASE_VM(vm)->GetEnv(vm, env, version);
CHECK_VMEXIT(vm, true);
return result;
}
/*
* ===========================================================================
* Function tables
* ===========================================================================
*/
static const struct JNINativeInterface gCheckNativeInterface = {
NULL,
NULL,
NULL,
NULL,
Check_GetVersion,
Check_DefineClass,
Check_FindClass,
Check_FromReflectedMethod,
Check_FromReflectedField,
Check_ToReflectedMethod,
Check_GetSuperclass,
Check_IsAssignableFrom,
Check_ToReflectedField,
Check_Throw,
Check_ThrowNew,
Check_ExceptionOccurred,
Check_ExceptionDescribe,
Check_ExceptionClear,
Check_FatalError,
Check_PushLocalFrame,
Check_PopLocalFrame,
Check_NewGlobalRef,
Check_DeleteGlobalRef,
Check_DeleteLocalRef,
Check_IsSameObject,
Check_NewLocalRef,
Check_EnsureLocalCapacity,
Check_AllocObject,
Check_NewObject,
Check_NewObjectV,
Check_NewObjectA,
Check_GetObjectClass,
Check_IsInstanceOf,
Check_GetMethodID,
Check_CallObjectMethod,
Check_CallObjectMethodV,
Check_CallObjectMethodA,
Check_CallBooleanMethod,
Check_CallBooleanMethodV,
Check_CallBooleanMethodA,
Check_CallByteMethod,
Check_CallByteMethodV,
Check_CallByteMethodA,
Check_CallCharMethod,
Check_CallCharMethodV,
Check_CallCharMethodA,
Check_CallShortMethod,
Check_CallShortMethodV,
Check_CallShortMethodA,
Check_CallIntMethod,
Check_CallIntMethodV,
Check_CallIntMethodA,
Check_CallLongMethod,
Check_CallLongMethodV,
Check_CallLongMethodA,
Check_CallFloatMethod,
Check_CallFloatMethodV,
Check_CallFloatMethodA,
Check_CallDoubleMethod,
Check_CallDoubleMethodV,
Check_CallDoubleMethodA,
Check_CallVoidMethod,
Check_CallVoidMethodV,
Check_CallVoidMethodA,
Check_CallNonvirtualObjectMethod,
Check_CallNonvirtualObjectMethodV,
Check_CallNonvirtualObjectMethodA,
Check_CallNonvirtualBooleanMethod,
Check_CallNonvirtualBooleanMethodV,
Check_CallNonvirtualBooleanMethodA,
Check_CallNonvirtualByteMethod,
Check_CallNonvirtualByteMethodV,
Check_CallNonvirtualByteMethodA,
Check_CallNonvirtualCharMethod,
Check_CallNonvirtualCharMethodV,
Check_CallNonvirtualCharMethodA,
Check_CallNonvirtualShortMethod,
Check_CallNonvirtualShortMethodV,
Check_CallNonvirtualShortMethodA,
Check_CallNonvirtualIntMethod,
Check_CallNonvirtualIntMethodV,
Check_CallNonvirtualIntMethodA,
Check_CallNonvirtualLongMethod,
Check_CallNonvirtualLongMethodV,
Check_CallNonvirtualLongMethodA,
Check_CallNonvirtualFloatMethod,
Check_CallNonvirtualFloatMethodV,
Check_CallNonvirtualFloatMethodA,
Check_CallNonvirtualDoubleMethod,
Check_CallNonvirtualDoubleMethodV,
Check_CallNonvirtualDoubleMethodA,
Check_CallNonvirtualVoidMethod,
Check_CallNonvirtualVoidMethodV,
Check_CallNonvirtualVoidMethodA,
Check_GetFieldID,
Check_GetObjectField,
Check_GetBooleanField,
Check_GetByteField,
Check_GetCharField,
Check_GetShortField,
Check_GetIntField,
Check_GetLongField,
Check_GetFloatField,
Check_GetDoubleField,
Check_SetObjectField,
Check_SetBooleanField,
Check_SetByteField,
Check_SetCharField,
Check_SetShortField,
Check_SetIntField,
Check_SetLongField,
Check_SetFloatField,
Check_SetDoubleField,
Check_GetStaticMethodID,
Check_CallStaticObjectMethod,
Check_CallStaticObjectMethodV,
Check_CallStaticObjectMethodA,
Check_CallStaticBooleanMethod,
Check_CallStaticBooleanMethodV,
Check_CallStaticBooleanMethodA,
Check_CallStaticByteMethod,
Check_CallStaticByteMethodV,
Check_CallStaticByteMethodA,
Check_CallStaticCharMethod,
Check_CallStaticCharMethodV,
Check_CallStaticCharMethodA,
Check_CallStaticShortMethod,
Check_CallStaticShortMethodV,
Check_CallStaticShortMethodA,
Check_CallStaticIntMethod,
Check_CallStaticIntMethodV,
Check_CallStaticIntMethodA,
Check_CallStaticLongMethod,
Check_CallStaticLongMethodV,
Check_CallStaticLongMethodA,
Check_CallStaticFloatMethod,
Check_CallStaticFloatMethodV,
Check_CallStaticFloatMethodA,
Check_CallStaticDoubleMethod,
Check_CallStaticDoubleMethodV,
Check_CallStaticDoubleMethodA,
Check_CallStaticVoidMethod,
Check_CallStaticVoidMethodV,
Check_CallStaticVoidMethodA,
Check_GetStaticFieldID,
Check_GetStaticObjectField,
Check_GetStaticBooleanField,
Check_GetStaticByteField,
Check_GetStaticCharField,
Check_GetStaticShortField,
Check_GetStaticIntField,
Check_GetStaticLongField,
Check_GetStaticFloatField,
Check_GetStaticDoubleField,
Check_SetStaticObjectField,
Check_SetStaticBooleanField,
Check_SetStaticByteField,
Check_SetStaticCharField,
Check_SetStaticShortField,
Check_SetStaticIntField,
Check_SetStaticLongField,
Check_SetStaticFloatField,
Check_SetStaticDoubleField,
Check_NewString,
Check_GetStringLength,
Check_GetStringChars,
Check_ReleaseStringChars,
Check_NewStringUTF,
Check_GetStringUTFLength,
Check_GetStringUTFChars,
Check_ReleaseStringUTFChars,
Check_GetArrayLength,
Check_NewObjectArray,
Check_GetObjectArrayElement,
Check_SetObjectArrayElement,
Check_NewBooleanArray,
Check_NewByteArray,
Check_NewCharArray,
Check_NewShortArray,
Check_NewIntArray,
Check_NewLongArray,
Check_NewFloatArray,
Check_NewDoubleArray,
Check_GetBooleanArrayElements,
Check_GetByteArrayElements,
Check_GetCharArrayElements,
Check_GetShortArrayElements,
Check_GetIntArrayElements,
Check_GetLongArrayElements,
Check_GetFloatArrayElements,
Check_GetDoubleArrayElements,
Check_ReleaseBooleanArrayElements,
Check_ReleaseByteArrayElements,
Check_ReleaseCharArrayElements,
Check_ReleaseShortArrayElements,
Check_ReleaseIntArrayElements,
Check_ReleaseLongArrayElements,
Check_ReleaseFloatArrayElements,
Check_ReleaseDoubleArrayElements,
Check_GetBooleanArrayRegion,
Check_GetByteArrayRegion,
Check_GetCharArrayRegion,
Check_GetShortArrayRegion,
Check_GetIntArrayRegion,
Check_GetLongArrayRegion,
Check_GetFloatArrayRegion,
Check_GetDoubleArrayRegion,
Check_SetBooleanArrayRegion,
Check_SetByteArrayRegion,
Check_SetCharArrayRegion,
Check_SetShortArrayRegion,
Check_SetIntArrayRegion,
Check_SetLongArrayRegion,
Check_SetFloatArrayRegion,
Check_SetDoubleArrayRegion,
Check_RegisterNatives,
Check_UnregisterNatives,
Check_MonitorEnter,
Check_MonitorExit,
Check_GetJavaVM,
Check_GetStringRegion,
Check_GetStringUTFRegion,
Check_GetPrimitiveArrayCritical,
Check_ReleasePrimitiveArrayCritical,
Check_GetStringCritical,
Check_ReleaseStringCritical,
Check_NewWeakGlobalRef,
Check_DeleteWeakGlobalRef,
Check_ExceptionCheck,
Check_NewDirectByteBuffer,
Check_GetDirectBufferAddress,
Check_GetDirectBufferCapacity,
Check_GetObjectRefType
};
static const struct JNIInvokeInterface gCheckInvokeInterface = {
NULL,
NULL,
NULL,
Check_DestroyJavaVM,
Check_AttachCurrentThread,
Check_DetachCurrentThread,
Check_GetEnv,
Check_AttachCurrentThreadAsDaemon,
};
/*
* Replace the normal table with the checked table.
*/
void dvmUseCheckedJniEnv(JNIEnvExt* pEnv)
{
assert(pEnv->funcTable != &gCheckNativeInterface);
pEnv->baseFuncTable = pEnv->funcTable;
pEnv->funcTable = &gCheckNativeInterface;
}
/*
* Replace the normal table with the checked table.
*/
void dvmUseCheckedJniVm(JavaVMExt* pVm)
{
assert(pVm->funcTable != &gCheckInvokeInterface);
pVm->baseFuncTable = pVm->funcTable;
pVm->funcTable = &gCheckInvokeInterface;
}