2 * Copyright (C) 2008 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * Support for -Xcheck:jni (the "careful" version of the JNI interfaces).
20 * We want to verify types, make sure class and field IDs are valid, and
21 * ensure that JNI's semantic expectations are being met. JNI seems to
22 * be relatively lax when it comes to requirements for permission checks,
23 * e.g. access to private methods is generally allowed from anywhere.
27 #include "JniInternal.h"
33 * Abort if we are configured to bail out on JNI warnings.
35 static void abortMaybe() {
36 if (!gDvmJni.warnOnly) {
37 dvmDumpThread(dvmThreadSelf(), false);
43 * ===========================================================================
44 * JNI call bridge wrapper
45 * ===========================================================================
49 * Check the result of a native method call that returns an object reference.
51 * The primary goal here is to verify that native code is returning the
52 * correct type of object. If it's declared to return a String but actually
53 * returns a byte array, things will fail in strange ways later on.
55 * This can be a fairly expensive operation, since we have to look up the
56 * return type class by name in method->clazz' class loader. We take a
57 * shortcut here and allow the call to succeed if the descriptor strings
58 * match. This will allow some false-positives when a class is redefined
59 * by a class loader, but that's rare enough that it doesn't seem worth
62 * At this point, pResult->l has already been converted to an object pointer.
64 static void checkCallResultCommon(const u4* args, const JValue* pResult,
65 const Method* method, Thread* self)
67 assert(pResult->l != NULL);
68 const Object* resultObj = (const Object*) pResult->l;
70 if (resultObj == kInvalidIndirectRefObject) {
71 ALOGW("JNI WARNING: invalid reference returned from native code");
72 const Method* method = dvmGetCurrentJNIMethod();
73 char* desc = dexProtoCopyMethodDescriptor(&method->prototype);
74 ALOGW(" in %s.%s:%s", method->clazz->descriptor, method->name, desc);
80 ClassObject* objClazz = resultObj->clazz;
83 * Make sure that pResult->l is an instance of the type this
84 * method was expected to return.
86 const char* declType = dexProtoGetReturnType(&method->prototype);
87 const char* objType = objClazz->descriptor;
88 if (strcmp(declType, objType) == 0) {
89 /* names match; ignore class loader issues and allow it */
90 ALOGV("Check %s.%s: %s io %s (FAST-OK)",
91 method->clazz->descriptor, method->name, objType, declType);
94 * Names didn't match. We need to resolve declType in the context
95 * of method->clazz->classLoader, and compare the class objects
98 * Since we're returning an instance of declType, it's safe to
99 * assume that it has been loaded and initialized (or, for the case
100 * of an array, generated). However, the current class loader may
101 * not be listed as an initiating loader, so we can't just look for
102 * it in the loaded-classes list.
104 ClassObject* declClazz = dvmFindClassNoInit(declType, method->clazz->classLoader);
105 if (declClazz == NULL) {
106 ALOGW("JNI WARNING: method declared to return '%s' returned '%s'",
108 ALOGW(" failed in %s.%s ('%s' not found)",
109 method->clazz->descriptor, method->name, declType);
113 if (!dvmInstanceof(objClazz, declClazz)) {
114 ALOGW("JNI WARNING: method declared to return '%s' returned '%s'",
116 ALOGW(" failed in %s.%s",
117 method->clazz->descriptor, method->name);
121 ALOGV("Check %s.%s: %s io %s (SLOW-OK)",
122 method->clazz->descriptor, method->name, objType, declType);
128 * Determine if we need to check the return type coming out of the call.
130 * (We don't simply do this at the top of checkCallResultCommon() because
131 * this is on the critical path for native method calls.)
133 static inline bool callNeedsCheck(const u4* args, JValue* pResult,
134 const Method* method, Thread* self)
136 return (method->shorty[0] == 'L' && !dvmCheckException(self) && pResult->l != NULL);
140 * Check a call into native code.
142 void dvmCheckCallJNIMethod(const u4* args, JValue* pResult,
143 const Method* method, Thread* self)
145 dvmCallJNIMethod(args, pResult, method, self);
146 if (callNeedsCheck(args, pResult, method, self)) {
147 checkCallResultCommon(args, pResult, method, self);
152 * ===========================================================================
153 * JNI function helpers
154 * ===========================================================================
157 static inline const JNINativeInterface* baseEnv(JNIEnv* env) {
158 return ((JNIEnvExt*) env)->baseFuncTable;
161 static inline const JNIInvokeInterface* baseVm(JavaVM* vm) {
162 return ((JavaVMExt*) vm)->baseFuncTable;
165 class ScopedCheckJniThreadState {
167 explicit ScopedCheckJniThreadState(JNIEnv* env) {
168 dvmChangeStatus(NULL, THREAD_RUNNING);
171 ~ScopedCheckJniThreadState() {
172 dvmChangeStatus(NULL, THREAD_NATIVE);
176 // Disallow copy and assignment.
177 ScopedCheckJniThreadState(const ScopedCheckJniThreadState&);
178 void operator=(const ScopedCheckJniThreadState&);
182 * Flags passed into ScopedCheck.
184 #define kFlag_Default 0x0000
186 #define kFlag_CritBad 0x0000 /* calling while in critical is bad */
187 #define kFlag_CritOkay 0x0001 /* ...okay */
188 #define kFlag_CritGet 0x0002 /* this is a critical "get" */
189 #define kFlag_CritRelease 0x0003 /* this is a critical "release" */
190 #define kFlag_CritMask 0x0003 /* bit mask to get "crit" value */
192 #define kFlag_ExcepBad 0x0000 /* raised exceptions are bad */
193 #define kFlag_ExcepOkay 0x0004 /* ...okay */
195 #define kFlag_Release 0x0010 /* are we in a non-critical release function? */
196 #define kFlag_NullableUtf 0x0020 /* are our UTF parameters nullable? */
198 #define kFlag_Invocation 0x8000 /* Part of the invocation interface (JavaVM*) */
200 static const char* indirectRefKindName(IndirectRef iref)
202 return indirectRefKindToString(indirectRefKind(iref));
207 // For JNIEnv* functions.
208 explicit ScopedCheck(JNIEnv* env, int flags, const char* functionName) {
209 init(env, flags, functionName, true);
213 // For JavaVM* functions.
214 explicit ScopedCheck(bool hasMethod, const char* functionName) {
215 init(NULL, kFlag_Invocation, functionName, hasMethod);
219 * In some circumstances the VM will screen class names, but it doesn't
220 * for class lookup. When things get bounced through a class loader, they
221 * can actually get normalized a couple of times; as a result, passing in
222 * a class name like "java.lang.Thread" instead of "java/lang/Thread" will
223 * work in some circumstances.
225 * This is incorrect and could cause strange behavior or compatibility
226 * problems, so we want to screen that out here.
228 * We expect "fully-qualified" class names, like "java/lang/Thread" or
229 * "[Ljava/lang/Object;".
231 void checkClassName(const char* className) {
232 if (!dexIsValidClassName(className, false)) {
233 ALOGW("JNI WARNING: illegal class name '%s' (%s)", className, mFunctionName);
234 ALOGW(" (should be formed like 'dalvik/system/DexFile')");
235 ALOGW(" or '[Ldalvik/system/DexFile;' or '[[B')");
240 void checkFieldTypeForGet(jfieldID fid, const char* expectedSignature, bool isStatic) {
242 ALOGW("JNI WARNING: null jfieldID");
247 bool printWarn = false;
248 Field* field = (Field*) fid;
249 const char* actualSignature = field->signature;
250 if (*expectedSignature == 'L') {
251 // 'actualSignature' has the exact type.
252 // We just know we're expecting some kind of reference.
253 if (*actualSignature != 'L' && *actualSignature != '[') {
256 } else if (*actualSignature != *expectedSignature) {
260 if (!printWarn && isStatic && !dvmIsStaticField(field)) {
262 ALOGW("JNI WARNING: accessing non-static field %s as static", field->name);
264 ALOGW("JNI WARNING: accessing static field %s as non-static", field->name);
270 ALOGW("JNI WARNING: %s for field '%s' of expected type %s, got %s",
271 mFunctionName, field->name, expectedSignature, actualSignature);
278 * Verify that the field is of the appropriate type. If the field has an
279 * object type, "jobj" is the object we're trying to assign into it.
281 * Works for both static and instance fields.
283 void checkFieldTypeForSet(jobject jobj, jfieldID fieldID, PrimitiveType prim, bool isStatic) {
284 if (fieldID == NULL) {
285 ALOGW("JNI WARNING: null jfieldID");
290 bool printWarn = false;
291 Field* field = (Field*) fieldID;
292 if ((field->signature[0] == 'L' || field->signature[0] == '[') && jobj != NULL) {
293 ScopedCheckJniThreadState ts(mEnv);
294 Object* obj = dvmDecodeIndirectRef(self(), jobj);
296 * If jobj is a weak global ref whose referent has been cleared,
297 * obj will be NULL. Otherwise, obj should always be non-NULL
300 if (obj != NULL && !dvmIsHeapAddress(obj)) {
301 ALOGW("JNI WARNING: field operation on invalid %s reference (%p)",
302 indirectRefKindName(jobj), jobj);
305 ClassObject* fieldClass = dvmFindLoadedClass(field->signature);
306 ClassObject* objClass = obj->clazz;
308 assert(fieldClass != NULL);
309 assert(objClass != NULL);
311 if (!dvmInstanceof(objClass, fieldClass)) {
312 ALOGW("JNI WARNING: set field '%s' expected type %s, got %s",
313 field->name, field->signature, objClass->descriptor);
317 } else if (dexGetPrimitiveTypeFromDescriptorChar(field->signature[0]) != prim) {
318 ALOGW("JNI WARNING: %s for field '%s' expected type %s, got %s",
319 mFunctionName, field->name, field->signature, primitiveTypeToName(prim));
321 } else if (isStatic && !dvmIsStaticField(field)) {
323 ALOGW("JNI WARNING: accessing non-static field %s as static", field->name);
325 ALOGW("JNI WARNING: accessing static field %s as non-static", field->name);
337 * Verify that this instance field ID is valid for this object.
339 * Assumes "jobj" has already been validated.
341 void checkInstanceFieldID(jobject jobj, jfieldID fieldID) {
342 ScopedCheckJniThreadState ts(mEnv);
344 Object* obj = dvmDecodeIndirectRef(self(), jobj);
345 if (!dvmIsHeapAddress(obj)) {
346 ALOGW("JNI ERROR: field operation on invalid reference (%p)", jobj);
351 * Check this class and all of its superclasses for a matching field.
352 * Don't need to scan interfaces.
354 ClassObject* clazz = obj->clazz;
355 while (clazz != NULL) {
356 if ((InstField*) fieldID >= clazz->ifields &&
357 (InstField*) fieldID < clazz->ifields + clazz->ifieldCount) {
361 clazz = clazz->super;
364 ALOGW("JNI WARNING: instance fieldID %p not valid for class %s",
365 fieldID, obj->clazz->descriptor);
371 * Verify that the pointer value is non-NULL.
373 void checkNonNull(const void* ptr) {
375 ALOGW("JNI WARNING: invalid null pointer (%s)", mFunctionName);
381 * Verify that the method's return type matches the type of call.
382 * 'expectedType' will be "L" for all objects, including arrays.
384 void checkSig(jmethodID methodID, const char* expectedType, bool isStatic) {
385 const Method* method = (const Method*) methodID;
386 bool printWarn = false;
388 if (*expectedType != method->shorty[0]) {
389 ALOGW("JNI WARNING: expected return type '%s'", expectedType);
391 } else if (isStatic && !dvmIsStaticMethod(method)) {
393 ALOGW("JNI WARNING: calling non-static method with static call");
395 ALOGW("JNI WARNING: calling static method with non-static call");
401 char* desc = dexProtoCopyMethodDescriptor(&method->prototype);
402 ALOGW(" calling %s.%s %s", method->clazz->descriptor, method->name, desc);
410 * Verify that this static field ID is valid for this class.
412 * Assumes "jclazz" has already been validated.
414 void checkStaticFieldID(jclass jclazz, jfieldID fieldID) {
415 ScopedCheckJniThreadState ts(mEnv);
416 ClassObject* clazz = (ClassObject*) dvmDecodeIndirectRef(self(), jclazz);
417 StaticField* base = &clazz->sfields[0];
418 int fieldCount = clazz->sfieldCount;
419 if ((StaticField*) fieldID < base || (StaticField*) fieldID >= base + fieldCount) {
420 ALOGW("JNI WARNING: static fieldID %p not valid for class %s",
421 fieldID, clazz->descriptor);
422 ALOGW(" base=%p count=%d", base, fieldCount);
429 * Verify that "methodID" is appropriate for "clazz".
431 * A mismatch isn't dangerous, because the jmethodID defines the class. In
432 * fact, jclazz is unused in the implementation. It's best if we don't
433 * allow bad code in the system though.
435 * Instances of "jclazz" must be instances of the method's declaring class.
437 void checkStaticMethod(jclass jclazz, jmethodID methodID) {
438 ScopedCheckJniThreadState ts(mEnv);
440 ClassObject* clazz = (ClassObject*) dvmDecodeIndirectRef(self(), jclazz);
441 const Method* method = (const Method*) methodID;
443 if (!dvmInstanceof(clazz, method->clazz)) {
444 ALOGW("JNI WARNING: can't call static %s.%s on class %s",
445 method->clazz->descriptor, method->name, clazz->descriptor);
452 * Verify that "methodID" is appropriate for "jobj".
454 * Make sure the object is an instance of the method's declaring class.
455 * (Note the methodID might point to a declaration in an interface; this
456 * will be handled automatically by the instanceof check.)
458 void checkVirtualMethod(jobject jobj, jmethodID methodID) {
459 ScopedCheckJniThreadState ts(mEnv);
461 Object* obj = dvmDecodeIndirectRef(self(), jobj);
462 const Method* method = (const Method*) methodID;
464 if (!dvmInstanceof(obj->clazz, method->clazz)) {
465 ALOGW("JNI WARNING: can't call %s.%s on instance of %s",
466 method->clazz->descriptor, method->name, obj->clazz->descriptor);
473 * The format string is a sequence of the following characters,
474 * and must be followed by arguments of the corresponding types
477 * Java primitive types:
485 * Z - jboolean (shown as true and false)
488 * Java reference types:
495 * b - jboolean (shown as JNI_TRUE and JNI_FALSE)
499 * r - jint (for release mode arguments)
500 * t - thread args (for AttachCurrentThread)
501 * u - const char* (modified UTF-8)
502 * z - jsize (for lengths; use i if negative values are okay)
505 * . - no argument; just print "..." (used for varargs JNI calls)
507 * Use the kFlag_NullableUtf flag where 'u' field(s) are nullable.
509 void check(bool entry, const char* fmt0, ...) {
512 bool shouldTrace = false;
513 const Method* method = NULL;
514 if ((gDvm.jniTrace || gDvmJni.logThirdPartyJni) && mHasMethod) {
515 // We need to guard some of the invocation interface's calls: a bad caller might
516 // use DetachCurrentThread or GetEnv on a thread that's not yet attached.
517 if ((mFlags & kFlag_Invocation) == 0 || dvmThreadSelf() != NULL) {
518 method = dvmGetCurrentJNIMethod();
521 if (method != NULL) {
522 // If both "-Xcheck:jni" and "-Xjnitrace:" are enabled, we print trace messages
523 // when a native method that matches the Xjnitrace argument calls a JNI function
524 // such as NewByteArray.
525 if (gDvm.jniTrace && strstr(method->clazz->descriptor, gDvm.jniTrace) != NULL) {
528 // If -Xjniopts:logThirdPartyJni is on, we want to log any JNI function calls
529 // made by a third-party native method.
530 if (gDvmJni.logThirdPartyJni) {
531 shouldTrace |= method->shouldTrace;
538 for (const char* fmt = fmt0; *fmt;) {
540 if (ch == 'B') { // jbyte
541 jbyte b = va_arg(ap, int);
542 if (b >= 0 && b < 10) {
543 StringAppendF(&msg, "%d", b);
545 StringAppendF(&msg, "%#x (%d)", b, b);
547 } else if (ch == 'C') { // jchar
548 jchar c = va_arg(ap, int);
549 if (c < 0x7f && c >= ' ') {
550 StringAppendF(&msg, "U+%x ('%c')", c, c);
552 StringAppendF(&msg, "U+%x", c);
554 } else if (ch == 'F' || ch == 'D') { // jfloat, jdouble
555 StringAppendF(&msg, "%g", va_arg(ap, double));
556 } else if (ch == 'I' || ch == 'S') { // jint, jshort
557 StringAppendF(&msg, "%d", va_arg(ap, int));
558 } else if (ch == 'J') { // jlong
559 StringAppendF(&msg, "%lld", va_arg(ap, jlong));
560 } else if (ch == 'Z') { // jboolean
561 StringAppendF(&msg, "%s", va_arg(ap, int) ? "true" : "false");
562 } else if (ch == 'V') { // void
564 } else if (ch == 'v') { // JavaVM*
565 JavaVM* vm = va_arg(ap, JavaVM*);
566 StringAppendF(&msg, "(JavaVM*)%p", vm);
567 } else if (ch == 'E') { // JNIEnv*
568 JNIEnv* env = va_arg(ap, JNIEnv*);
569 StringAppendF(&msg, "(JNIEnv*)%p", env);
570 } else if (ch == 'L' || ch == 'a' || ch == 's') { // jobject, jarray, jstring
571 // For logging purposes, these are identical.
572 jobject o = va_arg(ap, jobject);
576 StringAppendF(&msg, "%p", o);
578 } else if (ch == 'b') { // jboolean (JNI-style)
579 jboolean b = va_arg(ap, int);
580 msg += (b ? "JNI_TRUE" : "JNI_FALSE");
581 } else if (ch == 'c') { // jclass
582 jclass jc = va_arg(ap, jclass);
583 Object* c = dvmDecodeIndirectRef(self(), jc);
586 } else if (c == kInvalidIndirectRefObject || !dvmIsHeapAddress(c)) {
587 StringAppendF(&msg, "%p(INVALID)", jc);
589 std::string className(dvmHumanReadableType(c));
590 StringAppendF(&msg, "%s", className.c_str());
592 StringAppendF(&msg, " (%p)", jc);
595 } else if (ch == 'f') { // jfieldID
596 jfieldID fid = va_arg(ap, jfieldID);
597 std::string name(dvmHumanReadableField((Field*) fid));
598 StringAppendF(&msg, "%s", name.c_str());
600 StringAppendF(&msg, " (%p)", fid);
602 } else if (ch == 'z') { // non-negative jsize
603 // You might expect jsize to be size_t, but it's not; it's the same as jint.
604 // We only treat this specially so we can do the non-negative check.
605 // TODO: maybe this wasn't worth it?
606 jint i = va_arg(ap, jint);
607 StringAppendF(&msg, "%d", i);
608 } else if (ch == 'm') { // jmethodID
609 jmethodID mid = va_arg(ap, jmethodID);
610 std::string name(dvmHumanReadableMethod((Method*) mid, true));
611 StringAppendF(&msg, "%s", name.c_str());
613 StringAppendF(&msg, " (%p)", mid);
615 } else if (ch == 'p' || ch == 't') { // void* ("pointer" or "thread args")
616 void* p = va_arg(ap, void*);
620 StringAppendF(&msg, "(void*) %p", p);
622 } else if (ch == 'r') { // jint (release mode)
623 jint releaseMode = va_arg(ap, jint);
624 if (releaseMode == 0) {
626 } else if (releaseMode == JNI_ABORT) {
628 } else if (releaseMode == JNI_COMMIT) {
631 StringAppendF(&msg, "invalid release mode %d", releaseMode);
633 } else if (ch == 'u') { // const char* (modified UTF-8)
634 const char* utf = va_arg(ap, const char*);
638 StringAppendF(&msg, "\"%s\"", utf);
640 } else if (ch == '.') {
643 ALOGE("unknown trace format specifier %c", ch);
647 StringAppendF(&msg, ", ");
654 std::string methodName(dvmHumanReadableMethod(method, false));
655 ALOGI("JNI: %s -> %s(%s)", methodName.c_str(), mFunctionName, msg.c_str());
656 mIndent = methodName.size() + 1;
658 ALOGI("JNI: -> %s(%s)", mFunctionName, msg.c_str());
662 ALOGI("JNI: %*s<- %s returned %s", mIndent, "", mFunctionName, msg.c_str());
666 // We always do the thorough checks on entry, and never on exit...
669 for (const char* fmt = fmt0; *fmt; ++fmt) {
672 checkArray(va_arg(ap, jarray));
673 } else if (ch == 'c') {
674 checkClass(va_arg(ap, jclass));
675 } else if (ch == 'L') {
676 checkObject(va_arg(ap, jobject));
677 } else if (ch == 'r') {
678 checkReleaseMode(va_arg(ap, jint));
679 } else if (ch == 's') {
680 checkString(va_arg(ap, jstring));
681 } else if (ch == 't') {
682 checkThreadArgs(va_arg(ap, void*));
683 } else if (ch == 'u') {
684 if ((mFlags & kFlag_Release) != 0) {
685 checkNonNull(va_arg(ap, const char*));
687 bool nullable = ((mFlags & kFlag_NullableUtf) != 0);
688 checkUtfString(va_arg(ap, const char*), nullable);
690 } else if (ch == 'z') {
691 checkLengthPositive(va_arg(ap, jsize));
692 } else if (strchr("BCISZbfmpEv", ch) != NULL) {
693 va_arg(ap, int); // Skip this argument.
694 } else if (ch == 'D' || ch == 'F') {
695 va_arg(ap, double); // Skip this argument.
696 } else if (ch == 'J') {
697 va_arg(ap, long); // Skip this argument.
698 } else if (ch == '.') {
700 ALOGE("unknown check format specifier %c", ch);
708 // Only safe after checkThread returns.
710 return ((JNIEnvExt*) mEnv)->self;
715 const char* mFunctionName;
720 void init(JNIEnv* env, int flags, const char* functionName, bool hasMethod) {
724 // Use +6 to drop the leading "Check_"...
725 mFunctionName = functionName + 6;
727 // Set "hasMethod" to true if we have a valid thread with a method pointer.
728 // We won't have one before attaching a thread, after detaching a thread, or
729 // after destroying the VM.
730 mHasMethod = hasMethod;
734 * Verify that "array" is non-NULL and points to an Array object.
736 * Since we're dealing with objects, switch to "running" mode.
738 void checkArray(jarray jarr) {
740 ALOGW("JNI WARNING: received null array");
746 ScopedCheckJniThreadState ts(mEnv);
747 bool printWarn = false;
749 Object* obj = dvmDecodeIndirectRef(self(), jarr);
750 if (!dvmIsHeapAddress(obj)) {
751 ALOGW("JNI WARNING: jarray is an invalid %s reference (%p)",
752 indirectRefKindName(jarr), jarr);
754 } else if (obj->clazz->descriptor[0] != '[') {
755 ALOGW("JNI WARNING: jarray arg has wrong type (expected array, got %s)",
756 obj->clazz->descriptor);
766 void checkClass(jclass c) {
767 checkInstance(c, gDvm.classJavaLangClass, "jclass");
770 void checkLengthPositive(jsize length) {
772 ALOGW("JNI WARNING: negative jsize (%s)", mFunctionName);
778 * Verify that "jobj" is a valid object, and that it's an object that JNI
779 * is allowed to know about. We allow NULL references.
781 * Switches to "running" mode before performing checks.
783 void checkObject(jobject jobj) {
788 ScopedCheckJniThreadState ts(mEnv);
790 bool printWarn = false;
791 if (dvmGetJNIRefType(self(), jobj) == JNIInvalidRefType) {
792 ALOGW("JNI WARNING: %p is not a valid JNI reference", jobj);
795 Object* obj = dvmDecodeIndirectRef(self(), jobj);
796 if (obj == kInvalidIndirectRefObject) {
797 ALOGW("JNI WARNING: native code passing in invalid reference %p", jobj);
799 } else if (obj != NULL && !dvmIsHeapAddress(obj)) {
800 // TODO: when we remove workAroundAppJniBugs, this should be impossible.
801 ALOGW("JNI WARNING: native code passing in reference to invalid object %p %p",
814 * Verify that the "mode" argument passed to a primitive array Release
815 * function is one of the valid values.
817 void checkReleaseMode(jint mode) {
818 if (mode != 0 && mode != JNI_COMMIT && mode != JNI_ABORT) {
819 ALOGW("JNI WARNING: bad value for mode (%d) (%s)", mode, mFunctionName);
824 void checkString(jstring s) {
825 checkInstance(s, gDvm.classJavaLangString, "jstring");
828 void checkThreadArgs(void* thread_args) {
829 JavaVMAttachArgs* args = static_cast<JavaVMAttachArgs*>(thread_args);
830 if (args != NULL && args->version < JNI_VERSION_1_2) {
831 ALOGW("JNI WARNING: bad value for JNI version (%d) (%s)", args->version, mFunctionName);
836 void checkThread(int flags) {
837 // Get the *correct* JNIEnv by going through our TLS pointer.
838 JNIEnvExt* threadEnv = dvmGetJNIEnvForThread();
841 * Verify that the current thread is (a) attached and (b) associated with
842 * this particular instance of JNIEnv.
844 bool printWarn = false;
845 if (threadEnv == NULL) {
846 ALOGE("JNI ERROR: non-VM thread making JNI calls");
847 // don't set printWarn -- it'll try to call showLocation()
849 } else if ((JNIEnvExt*) mEnv != threadEnv) {
850 if (dvmThreadSelf()->threadId != threadEnv->envThreadId) {
851 ALOGE("JNI: threadEnv != thread->env?");
855 ALOGW("JNI WARNING: threadid=%d using env from threadid=%d",
856 threadEnv->envThreadId, ((JNIEnvExt*) mEnv)->envThreadId);
859 // If we're keeping broken code limping along, we need to suppress the abort...
860 if (gDvmJni.workAroundAppJniBugs) {
864 /* this is a bad idea -- need to throw as we exit, or abort func */
865 //dvmThrowRuntimeException("invalid use of JNI env ptr");
866 } else if (((JNIEnvExt*) mEnv)->self != dvmThreadSelf()) {
867 /* correct JNIEnv*; make sure the "self" pointer is correct */
868 ALOGE("JNI ERROR: env->self != thread-self (%p vs. %p)",
869 ((JNIEnvExt*) mEnv)->self, dvmThreadSelf());
874 * Verify that, if this thread previously made a critical "get" call, we
875 * do the corresponding "release" call before we try anything else.
877 switch (flags & kFlag_CritMask) {
878 case kFlag_CritOkay: // okay to call this method
880 case kFlag_CritBad: // not okay to call
881 if (threadEnv->critical) {
882 ALOGW("JNI WARNING: threadid=%d using JNI after critical get",
883 threadEnv->envThreadId);
887 case kFlag_CritGet: // this is a "get" call
888 /* don't check here; we allow nested gets */
889 threadEnv->critical++;
891 case kFlag_CritRelease: // this is a "release" call
892 threadEnv->critical--;
893 if (threadEnv->critical < 0) {
894 ALOGW("JNI WARNING: threadid=%d called too many crit releases",
895 threadEnv->envThreadId);
904 * Verify that, if an exception has been raised, the native code doesn't
905 * make any JNI calls other than the Exception* methods.
907 bool printException = false;
908 if ((flags & kFlag_ExcepOkay) == 0 && dvmCheckException(dvmThreadSelf())) {
909 ALOGW("JNI WARNING: JNI method called with exception pending");
911 printException = true;
917 if (printException) {
918 ALOGW("Pending exception is:");
919 dvmLogExceptionStackTrace();
927 * Verify that "bytes" points to valid "modified UTF-8" data.
929 void checkUtfString(const char* bytes, bool nullable) {
932 ALOGW("JNI WARNING: non-nullable const char* was NULL");
939 const char* errorKind = NULL;
940 u1 utf8 = checkUtfBytes(bytes, &errorKind);
941 if (errorKind != NULL) {
942 ALOGW("JNI WARNING: input is not valid Modified UTF-8: illegal %s byte %#x", errorKind, utf8);
943 ALOGW(" string: '%s'", bytes);
950 * Verify that "jobj" is a valid non-NULL object reference, and points to
951 * an instance of expectedClass.
953 * Because we're looking at an object on the GC heap, we have to switch
954 * to "running" mode before doing the checks.
956 void checkInstance(jobject jobj, ClassObject* expectedClass, const char* argName) {
958 ALOGW("JNI WARNING: received null %s", argName);
964 ScopedCheckJniThreadState ts(mEnv);
965 bool printWarn = false;
967 Object* obj = dvmDecodeIndirectRef(self(), jobj);
968 if (!dvmIsHeapAddress(obj)) {
969 ALOGW("JNI WARNING: %s is an invalid %s reference (%p)",
970 argName, indirectRefKindName(jobj), jobj);
972 } else if (obj->clazz != expectedClass) {
973 ALOGW("JNI WARNING: %s arg has wrong type (expected %s, got %s)",
974 argName, expectedClass->descriptor, obj->clazz->descriptor);
984 static u1 checkUtfBytes(const char* bytes, const char** errorKind) {
985 while (*bytes != '\0') {
986 u1 utf8 = *(bytes++);
987 // Switch on the high four bits.
997 // Bit pattern 0xxx. No need for any extra bytes.
1005 * Bit pattern 10xx or 1111, which are illegal start bytes.
1006 * Note: 1111 is valid for normal UTF-8, but not the
1007 * modified UTF-8 used here.
1009 *errorKind = "start";
1012 // Bit pattern 1110, so there are two additional bytes.
1014 if ((utf8 & 0xc0) != 0x80) {
1015 *errorKind = "continuation";
1018 // Fall through to take care of the final byte.
1021 // Bit pattern 110x, so there is one additional byte.
1023 if ((utf8 & 0xc0) != 0x80) {
1024 *errorKind = "continuation";
1034 * Returns a human-readable name for the given primitive type.
1036 static const char* primitiveTypeToName(PrimitiveType primType) {
1038 case PRIM_VOID: return "void";
1039 case PRIM_BOOLEAN: return "boolean";
1040 case PRIM_BYTE: return "byte";
1041 case PRIM_SHORT: return "short";
1042 case PRIM_CHAR: return "char";
1043 case PRIM_INT: return "int";
1044 case PRIM_LONG: return "long";
1045 case PRIM_FLOAT: return "float";
1046 case PRIM_DOUBLE: return "double";
1047 case PRIM_NOT: return "Object/array";
1048 default: return "???";
1052 void showLocation() {
1053 const Method* method = dvmGetCurrentJNIMethod();
1054 char* desc = dexProtoCopyMethodDescriptor(&method->prototype);
1055 ALOGW(" in %s.%s:%s (%s)", method->clazz->descriptor, method->name, desc, mFunctionName);
1059 // Disallow copy and assignment.
1060 ScopedCheck(const ScopedCheck&);
1061 void operator=(const ScopedCheck&);
1065 * ===========================================================================
1067 * ===========================================================================
1070 #define kGuardLen 512 /* must be multiple of 2 */
1071 #define kGuardPattern 0xd5e3 /* uncommon values; d5e3d5e3 invalid addr */
1072 #define kGuardMagic 0xffd5aa96
1074 /* this gets tucked in at the start of the buffer; struct size must be even */
1075 struct GuardedCopy {
1079 const void* originalPtr;
1081 /* find the GuardedCopy given the pointer into the "live" data */
1082 static inline const GuardedCopy* fromData(const void* dataBuf) {
1083 return reinterpret_cast<const GuardedCopy*>(actualBuffer(dataBuf));
1087 * Create an over-sized buffer to hold the contents of "buf". Copy it in,
1088 * filling in the area around it with guard data.
1090 * We use a 16-bit pattern to make a rogue memset less likely to elude us.
1092 static void* create(const void* buf, size_t len, bool modOkay) {
1093 size_t newLen = actualLength(len);
1094 u1* newBuf = debugAlloc(newLen);
1096 /* fill it in with a pattern */
1097 u2* pat = (u2*) newBuf;
1098 for (size_t i = 0; i < newLen / 2; i++) {
1099 *pat++ = kGuardPattern;
1102 /* copy the data in; note "len" could be zero */
1103 memcpy(newBuf + kGuardLen / 2, buf, len);
1105 /* if modification is not expected, grab a checksum */
1108 adler = adler32(0L, Z_NULL, 0);
1109 adler = adler32(adler, (const Bytef*)buf, len);
1110 *(uLong*)newBuf = adler;
1113 GuardedCopy* pExtra = reinterpret_cast<GuardedCopy*>(newBuf);
1114 pExtra->magic = kGuardMagic;
1115 pExtra->adler = adler;
1116 pExtra->originalPtr = buf;
1117 pExtra->originalLen = len;
1119 return newBuf + kGuardLen / 2;
1123 * Free up the guard buffer, scrub it, and return the original pointer.
1125 static void* destroy(void* dataBuf) {
1126 const GuardedCopy* pExtra = GuardedCopy::fromData(dataBuf);
1127 void* originalPtr = (void*) pExtra->originalPtr;
1128 size_t len = pExtra->originalLen;
1129 debugFree(dataBuf, len);
1134 * Verify the guard area and, if "modOkay" is false, that the data itself
1135 * has not been altered.
1137 * The caller has already checked that "dataBuf" is non-NULL.
1139 static bool check(const void* dataBuf, bool modOkay) {
1140 static const u4 kMagicCmp = kGuardMagic;
1141 const u1* fullBuf = actualBuffer(dataBuf);
1142 const GuardedCopy* pExtra = GuardedCopy::fromData(dataBuf);
1145 * Before we do anything with "pExtra", check the magic number. We
1146 * do the check with memcmp rather than "==" in case the pointer is
1147 * unaligned. If it points to completely bogus memory we're going
1148 * to crash, but there's no easy way around that.
1150 if (memcmp(&pExtra->magic, &kMagicCmp, 4) != 0) {
1152 memcpy(buf, &pExtra->magic, 4);
1153 ALOGE("JNI: guard magic does not match (found 0x%02x%02x%02x%02x) -- incorrect data pointer %p?",
1154 buf[3], buf[2], buf[1], buf[0], dataBuf); /* assume little endian */
1158 size_t len = pExtra->originalLen;
1160 /* check bottom half of guard; skip over optional checksum storage */
1161 const u2* pat = (u2*) fullBuf;
1162 for (size_t i = sizeof(GuardedCopy) / 2; i < (kGuardLen / 2 - sizeof(GuardedCopy)) / 2; i++) {
1163 if (pat[i] != kGuardPattern) {
1164 ALOGE("JNI: guard pattern(1) disturbed at %p + %d", fullBuf, i*2);
1169 int offset = kGuardLen / 2 + len;
1170 if (offset & 0x01) {
1171 /* odd byte; expected value depends on endian-ness of host */
1172 const u2 patSample = kGuardPattern;
1173 if (fullBuf[offset] != ((const u1*) &patSample)[1]) {
1174 ALOGE("JNI: guard pattern disturbed in odd byte after %p (+%d) 0x%02x 0x%02x",
1175 fullBuf, offset, fullBuf[offset], ((const u1*) &patSample)[1]);
1181 /* check top half of guard */
1182 pat = (u2*) (fullBuf + offset);
1183 for (size_t i = 0; i < kGuardLen / 4; i++) {
1184 if (pat[i] != kGuardPattern) {
1185 ALOGE("JNI: guard pattern(2) disturbed at %p + %d", fullBuf, offset + i*2);
1191 * If modification is not expected, verify checksum. Strictly speaking
1192 * this is wrong: if we told the client that we made a copy, there's no
1193 * reason they can't alter the buffer.
1196 uLong adler = adler32(0L, Z_NULL, 0);
1197 adler = adler32(adler, (const Bytef*)dataBuf, len);
1198 if (pExtra->adler != adler) {
1199 ALOGE("JNI: buffer modified (0x%08lx vs 0x%08lx) at addr %p",
1200 pExtra->adler, adler, dataBuf);
1209 static u1* debugAlloc(size_t len) {
1210 void* result = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
1211 if (result == MAP_FAILED) {
1212 ALOGE("GuardedCopy::create mmap(%d) failed: %s", len, strerror(errno));
1215 return reinterpret_cast<u1*>(result);
1218 static void debugFree(void* dataBuf, size_t len) {
1219 u1* fullBuf = actualBuffer(dataBuf);
1220 size_t totalByteCount = actualLength(len);
1221 // TODO: we could mprotect instead, and keep the allocation around for a while.
1222 // This would be even more expensive, but it might catch more errors.
1223 // if (mprotect(fullBuf, totalByteCount, PROT_NONE) != 0) {
1224 // ALOGW("mprotect(PROT_NONE) failed: %s", strerror(errno));
1226 if (munmap(fullBuf, totalByteCount) != 0) {
1227 ALOGW("munmap failed: %s", strerror(errno));
1232 static const u1* actualBuffer(const void* dataBuf) {
1233 return reinterpret_cast<const u1*>(dataBuf) - kGuardLen / 2;
1236 static u1* actualBuffer(void* dataBuf) {
1237 return reinterpret_cast<u1*>(dataBuf) - kGuardLen / 2;
1240 // Underlying length of a user allocation of 'length' bytes.
1241 static size_t actualLength(size_t length) {
1242 return (length + kGuardLen + 1) & ~0x01;
1247 * Return the width, in bytes, of a primitive type.
1249 static int dvmPrimitiveTypeWidth(PrimitiveType primType) {
1251 case PRIM_BOOLEAN: return 1;
1252 case PRIM_BYTE: return 1;
1253 case PRIM_SHORT: return 2;
1254 case PRIM_CHAR: return 2;
1255 case PRIM_INT: return 4;
1256 case PRIM_LONG: return 8;
1257 case PRIM_FLOAT: return 4;
1258 case PRIM_DOUBLE: return 8;
1268 * Create a guarded copy of a primitive array. Modifications to the copied
1269 * data are allowed. Returns a pointer to the copied data.
1271 static void* createGuardedPACopy(JNIEnv* env, const jarray jarr, jboolean* isCopy) {
1272 ScopedCheckJniThreadState ts(env);
1274 ArrayObject* arrObj = (ArrayObject*) dvmDecodeIndirectRef(dvmThreadSelf(), jarr);
1275 PrimitiveType primType = arrObj->clazz->elementClass->primitiveType;
1276 int len = arrObj->length * dvmPrimitiveTypeWidth(primType);
1277 void* result = GuardedCopy::create(arrObj->contents, len, true);
1278 if (isCopy != NULL) {
1285 * Perform the array "release" operation, which may or may not copy data
1286 * back into the VM, and may or may not release the underlying storage.
1288 static void* releaseGuardedPACopy(JNIEnv* env, jarray jarr, void* dataBuf, int mode) {
1289 ScopedCheckJniThreadState ts(env);
1290 ArrayObject* arrObj = (ArrayObject*) dvmDecodeIndirectRef(dvmThreadSelf(), jarr);
1292 if (!GuardedCopy::check(dataBuf, true)) {
1293 ALOGE("JNI: failed guarded copy check in releaseGuardedPACopy");
1298 if (mode != JNI_ABORT) {
1299 size_t len = GuardedCopy::fromData(dataBuf)->originalLen;
1300 memcpy(arrObj->contents, dataBuf, len);
1304 if (mode != JNI_COMMIT) {
1305 result = (u1*) GuardedCopy::destroy(dataBuf);
1307 result = (u1*) (void*) GuardedCopy::fromData(dataBuf)->originalPtr;
1310 /* pointer is to the array contents; back up to the array object */
1311 result -= OFFSETOF_MEMBER(ArrayObject, contents);
1317 * ===========================================================================
1319 * ===========================================================================
1322 #define CHECK_JNI_ENTRY(flags, types, args...) \
1323 ScopedCheck sc(env, flags, __FUNCTION__); \
1324 sc.check(true, types, ##args)
1326 #define CHECK_JNI_EXIT(type, exp) ({ \
1327 typeof (exp) _rc = (exp); \
1328 sc.check(false, type, _rc); \
1330 #define CHECK_JNI_EXIT_VOID() \
1331 sc.check(false, "V")
1333 static jint Check_GetVersion(JNIEnv* env) {
1334 CHECK_JNI_ENTRY(kFlag_Default, "E", env);
1335 return CHECK_JNI_EXIT("I", baseEnv(env)->GetVersion(env));
1338 static jclass Check_DefineClass(JNIEnv* env, const char* name, jobject loader,
1339 const jbyte* buf, jsize bufLen)
1341 CHECK_JNI_ENTRY(kFlag_Default, "EuLpz", env, name, loader, buf, bufLen);
1342 sc.checkClassName(name);
1343 return CHECK_JNI_EXIT("c", baseEnv(env)->DefineClass(env, name, loader, buf, bufLen));
1346 static jclass Check_FindClass(JNIEnv* env, const char* name) {
1347 CHECK_JNI_ENTRY(kFlag_Default, "Eu", env, name);
1348 sc.checkClassName(name);
1349 return CHECK_JNI_EXIT("c", baseEnv(env)->FindClass(env, name));
1352 static jclass Check_GetSuperclass(JNIEnv* env, jclass clazz) {
1353 CHECK_JNI_ENTRY(kFlag_Default, "Ec", env, clazz);
1354 return CHECK_JNI_EXIT("c", baseEnv(env)->GetSuperclass(env, clazz));
1357 static jboolean Check_IsAssignableFrom(JNIEnv* env, jclass clazz1, jclass clazz2) {
1358 CHECK_JNI_ENTRY(kFlag_Default, "Ecc", env, clazz1, clazz2);
1359 return CHECK_JNI_EXIT("b", baseEnv(env)->IsAssignableFrom(env, clazz1, clazz2));
1362 static jmethodID Check_FromReflectedMethod(JNIEnv* env, jobject method) {
1363 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, method);
1364 // TODO: check that 'field' is a java.lang.reflect.Method.
1365 return CHECK_JNI_EXIT("m", baseEnv(env)->FromReflectedMethod(env, method));
1368 static jfieldID Check_FromReflectedField(JNIEnv* env, jobject field) {
1369 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, field);
1370 // TODO: check that 'field' is a java.lang.reflect.Field.
1371 return CHECK_JNI_EXIT("f", baseEnv(env)->FromReflectedField(env, field));
1374 static jobject Check_ToReflectedMethod(JNIEnv* env, jclass cls,
1375 jmethodID methodID, jboolean isStatic)
1377 CHECK_JNI_ENTRY(kFlag_Default, "Ecmb", env, cls, methodID, isStatic);
1378 return CHECK_JNI_EXIT("L", baseEnv(env)->ToReflectedMethod(env, cls, methodID, isStatic));
1381 static jobject Check_ToReflectedField(JNIEnv* env, jclass cls,
1382 jfieldID fieldID, jboolean isStatic)
1384 CHECK_JNI_ENTRY(kFlag_Default, "Ecfb", env, cls, fieldID, isStatic);
1385 return CHECK_JNI_EXIT("L", baseEnv(env)->ToReflectedField(env, cls, fieldID, isStatic));
1388 static jint Check_Throw(JNIEnv* env, jthrowable obj) {
1389 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj);
1390 // TODO: check that 'obj' is a java.lang.Throwable.
1391 return CHECK_JNI_EXIT("I", baseEnv(env)->Throw(env, obj));
1394 static jint Check_ThrowNew(JNIEnv* env, jclass clazz, const char* message) {
1395 CHECK_JNI_ENTRY(kFlag_NullableUtf, "Ecu", env, clazz, message);
1396 return CHECK_JNI_EXIT("I", baseEnv(env)->ThrowNew(env, clazz, message));
1399 static jthrowable Check_ExceptionOccurred(JNIEnv* env) {
1400 CHECK_JNI_ENTRY(kFlag_ExcepOkay, "E", env);
1401 return CHECK_JNI_EXIT("L", baseEnv(env)->ExceptionOccurred(env));
1404 static void Check_ExceptionDescribe(JNIEnv* env) {
1405 CHECK_JNI_ENTRY(kFlag_ExcepOkay, "E", env);
1406 baseEnv(env)->ExceptionDescribe(env);
1407 CHECK_JNI_EXIT_VOID();
1410 static void Check_ExceptionClear(JNIEnv* env) {
1411 CHECK_JNI_ENTRY(kFlag_ExcepOkay, "E", env);
1412 baseEnv(env)->ExceptionClear(env);
1413 CHECK_JNI_EXIT_VOID();
1416 static void Check_FatalError(JNIEnv* env, const char* msg) {
1417 CHECK_JNI_ENTRY(kFlag_NullableUtf, "Eu", env, msg);
1418 baseEnv(env)->FatalError(env, msg);
1419 CHECK_JNI_EXIT_VOID();
1422 static jint Check_PushLocalFrame(JNIEnv* env, jint capacity) {
1423 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EI", env, capacity);
1424 return CHECK_JNI_EXIT("I", baseEnv(env)->PushLocalFrame(env, capacity));
1427 static jobject Check_PopLocalFrame(JNIEnv* env, jobject res) {
1428 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, res);
1429 return CHECK_JNI_EXIT("L", baseEnv(env)->PopLocalFrame(env, res));
1432 static jobject Check_NewGlobalRef(JNIEnv* env, jobject obj) {
1433 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj);
1434 return CHECK_JNI_EXIT("L", baseEnv(env)->NewGlobalRef(env, obj));
1437 static void Check_DeleteGlobalRef(JNIEnv* env, jobject globalRef) {
1438 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, globalRef);
1439 if (globalRef != NULL && dvmGetJNIRefType(sc.self(), globalRef) != JNIGlobalRefType) {
1440 ALOGW("JNI WARNING: DeleteGlobalRef on non-global %p (type=%d)",
1441 globalRef, dvmGetJNIRefType(sc.self(), globalRef));
1444 baseEnv(env)->DeleteGlobalRef(env, globalRef);
1445 CHECK_JNI_EXIT_VOID();
1449 static jobject Check_NewLocalRef(JNIEnv* env, jobject ref) {
1450 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, ref);
1451 return CHECK_JNI_EXIT("L", baseEnv(env)->NewLocalRef(env, ref));
1454 static void Check_DeleteLocalRef(JNIEnv* env, jobject localRef) {
1455 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, localRef);
1456 if (localRef != NULL && dvmGetJNIRefType(sc.self(), localRef) != JNILocalRefType) {
1457 ALOGW("JNI WARNING: DeleteLocalRef on non-local %p (type=%d)",
1458 localRef, dvmGetJNIRefType(sc.self(), localRef));
1461 baseEnv(env)->DeleteLocalRef(env, localRef);
1462 CHECK_JNI_EXIT_VOID();
1466 static jint Check_EnsureLocalCapacity(JNIEnv *env, jint capacity) {
1467 CHECK_JNI_ENTRY(kFlag_Default, "EI", env, capacity);
1468 return CHECK_JNI_EXIT("I", baseEnv(env)->EnsureLocalCapacity(env, capacity));
1471 static jboolean Check_IsSameObject(JNIEnv* env, jobject ref1, jobject ref2) {
1472 CHECK_JNI_ENTRY(kFlag_Default, "ELL", env, ref1, ref2);
1473 return CHECK_JNI_EXIT("b", baseEnv(env)->IsSameObject(env, ref1, ref2));
1476 static jobject Check_AllocObject(JNIEnv* env, jclass clazz) {
1477 CHECK_JNI_ENTRY(kFlag_Default, "Ec", env, clazz);
1478 return CHECK_JNI_EXIT("L", baseEnv(env)->AllocObject(env, clazz));
1481 static jobject Check_NewObject(JNIEnv* env, jclass clazz, jmethodID methodID, ...) {
1482 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID);
1484 va_start(args, methodID);
1485 jobject result = baseEnv(env)->NewObjectV(env, clazz, methodID, args);
1487 return CHECK_JNI_EXIT("L", result);
1490 static jobject Check_NewObjectV(JNIEnv* env, jclass clazz, jmethodID methodID, va_list args) {
1491 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID);
1492 return CHECK_JNI_EXIT("L", baseEnv(env)->NewObjectV(env, clazz, methodID, args));
1495 static jobject Check_NewObjectA(JNIEnv* env, jclass clazz, jmethodID methodID, jvalue* args) {
1496 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID);
1497 return CHECK_JNI_EXIT("L", baseEnv(env)->NewObjectA(env, clazz, methodID, args));
1500 static jclass Check_GetObjectClass(JNIEnv* env, jobject obj) {
1501 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj);
1502 return CHECK_JNI_EXIT("c", baseEnv(env)->GetObjectClass(env, obj));
1505 static jboolean Check_IsInstanceOf(JNIEnv* env, jobject obj, jclass clazz) {
1506 CHECK_JNI_ENTRY(kFlag_Default, "ELc", env, obj, clazz);
1507 return CHECK_JNI_EXIT("b", baseEnv(env)->IsInstanceOf(env, obj, clazz));
1510 static jmethodID Check_GetMethodID(JNIEnv* env, jclass clazz, const char* name, const char* sig) {
1511 CHECK_JNI_ENTRY(kFlag_Default, "Ecuu", env, clazz, name, sig);
1512 return CHECK_JNI_EXIT("m", baseEnv(env)->GetMethodID(env, clazz, name, sig));
1515 static jfieldID Check_GetFieldID(JNIEnv* env, jclass clazz, const char* name, const char* sig) {
1516 CHECK_JNI_ENTRY(kFlag_Default, "Ecuu", env, clazz, name, sig);
1517 return CHECK_JNI_EXIT("f", baseEnv(env)->GetFieldID(env, clazz, name, sig));
1520 static jmethodID Check_GetStaticMethodID(JNIEnv* env, jclass clazz,
1521 const char* name, const char* sig)
1523 CHECK_JNI_ENTRY(kFlag_Default, "Ecuu", env, clazz, name, sig);
1524 return CHECK_JNI_EXIT("m", baseEnv(env)->GetStaticMethodID(env, clazz, name, sig));
1527 static jfieldID Check_GetStaticFieldID(JNIEnv* env, jclass clazz,
1528 const char* name, const char* sig)
1530 CHECK_JNI_ENTRY(kFlag_Default, "Ecuu", env, clazz, name, sig);
1531 return CHECK_JNI_EXIT("f", baseEnv(env)->GetStaticFieldID(env, clazz, name, sig));
1534 #define FIELD_ACCESSORS(_ctype, _jname, _ftype, _type) \
1535 static _ctype Check_GetStatic##_jname##Field(JNIEnv* env, jclass clazz, jfieldID fieldID) { \
1536 CHECK_JNI_ENTRY(kFlag_Default, "Ecf", env, clazz, fieldID); \
1537 sc.checkStaticFieldID(clazz, fieldID); \
1538 sc.checkFieldTypeForGet(fieldID, _type, true); \
1539 return CHECK_JNI_EXIT(_type, baseEnv(env)->GetStatic##_jname##Field(env, clazz, fieldID)); \
1541 static _ctype Check_Get##_jname##Field(JNIEnv* env, jobject obj, jfieldID fieldID) { \
1542 CHECK_JNI_ENTRY(kFlag_Default, "ELf", env, obj, fieldID); \
1543 sc.checkInstanceFieldID(obj, fieldID); \
1544 sc.checkFieldTypeForGet(fieldID, _type, false); \
1545 return CHECK_JNI_EXIT(_type, baseEnv(env)->Get##_jname##Field(env, obj, fieldID)); \
1547 static void Check_SetStatic##_jname##Field(JNIEnv* env, jclass clazz, jfieldID fieldID, _ctype value) { \
1548 CHECK_JNI_ENTRY(kFlag_Default, "Ecf" _type, env, clazz, fieldID, value); \
1549 sc.checkStaticFieldID(clazz, fieldID); \
1550 /* "value" arg only used when type == ref */ \
1551 sc.checkFieldTypeForSet((jobject)(u4)value, fieldID, _ftype, true); \
1552 baseEnv(env)->SetStatic##_jname##Field(env, clazz, fieldID, value); \
1553 CHECK_JNI_EXIT_VOID(); \
1555 static void Check_Set##_jname##Field(JNIEnv* env, jobject obj, jfieldID fieldID, _ctype value) { \
1556 CHECK_JNI_ENTRY(kFlag_Default, "ELf" _type, env, obj, fieldID, value); \
1557 sc.checkInstanceFieldID(obj, fieldID); \
1558 /* "value" arg only used when type == ref */ \
1559 sc.checkFieldTypeForSet((jobject)(u4) value, fieldID, _ftype, false); \
1560 baseEnv(env)->Set##_jname##Field(env, obj, fieldID, value); \
1561 CHECK_JNI_EXIT_VOID(); \
1564 FIELD_ACCESSORS(jobject, Object, PRIM_NOT, "L");
1565 FIELD_ACCESSORS(jboolean, Boolean, PRIM_BOOLEAN, "Z");
1566 FIELD_ACCESSORS(jbyte, Byte, PRIM_BYTE, "B");
1567 FIELD_ACCESSORS(jchar, Char, PRIM_CHAR, "C");
1568 FIELD_ACCESSORS(jshort, Short, PRIM_SHORT, "S");
1569 FIELD_ACCESSORS(jint, Int, PRIM_INT, "I");
1570 FIELD_ACCESSORS(jlong, Long, PRIM_LONG, "J");
1571 FIELD_ACCESSORS(jfloat, Float, PRIM_FLOAT, "F");
1572 FIELD_ACCESSORS(jdouble, Double, PRIM_DOUBLE, "D");
1574 #define CALL(_ctype, _jname, _retdecl, _retasgn, _retok, _retsig) \
1576 static _ctype Check_Call##_jname##Method(JNIEnv* env, jobject obj, \
1577 jmethodID methodID, ...) \
1579 CHECK_JNI_ENTRY(kFlag_Default, "ELm.", env, obj, methodID); /* TODO: args! */ \
1580 sc.checkSig(methodID, _retsig, false); \
1581 sc.checkVirtualMethod(obj, methodID); \
1584 va_start(args, methodID); \
1585 _retasgn baseEnv(env)->Call##_jname##MethodV(env, obj, methodID, args); \
1589 static _ctype Check_Call##_jname##MethodV(JNIEnv* env, jobject obj, \
1590 jmethodID methodID, va_list args) \
1592 CHECK_JNI_ENTRY(kFlag_Default, "ELm.", env, obj, methodID); /* TODO: args! */ \
1593 sc.checkSig(methodID, _retsig, false); \
1594 sc.checkVirtualMethod(obj, methodID); \
1596 _retasgn baseEnv(env)->Call##_jname##MethodV(env, obj, methodID, args); \
1599 static _ctype Check_Call##_jname##MethodA(JNIEnv* env, jobject obj, \
1600 jmethodID methodID, jvalue* args) \
1602 CHECK_JNI_ENTRY(kFlag_Default, "ELm.", env, obj, methodID); /* TODO: args! */ \
1603 sc.checkSig(methodID, _retsig, false); \
1604 sc.checkVirtualMethod(obj, methodID); \
1606 _retasgn baseEnv(env)->Call##_jname##MethodA(env, obj, methodID, args); \
1609 /* Non-virtual... */ \
1610 static _ctype Check_CallNonvirtual##_jname##Method(JNIEnv* env, \
1611 jobject obj, jclass clazz, jmethodID methodID, ...) \
1613 CHECK_JNI_ENTRY(kFlag_Default, "ELcm.", env, obj, clazz, methodID); /* TODO: args! */ \
1614 sc.checkSig(methodID, _retsig, false); \
1615 sc.checkVirtualMethod(obj, methodID); \
1618 va_start(args, methodID); \
1619 _retasgn baseEnv(env)->CallNonvirtual##_jname##MethodV(env, obj, clazz, methodID, args); \
1623 static _ctype Check_CallNonvirtual##_jname##MethodV(JNIEnv* env, \
1624 jobject obj, jclass clazz, jmethodID methodID, va_list args) \
1626 CHECK_JNI_ENTRY(kFlag_Default, "ELcm.", env, obj, clazz, methodID); /* TODO: args! */ \
1627 sc.checkSig(methodID, _retsig, false); \
1628 sc.checkVirtualMethod(obj, methodID); \
1630 _retasgn baseEnv(env)->CallNonvirtual##_jname##MethodV(env, obj, clazz, methodID, args); \
1633 static _ctype Check_CallNonvirtual##_jname##MethodA(JNIEnv* env, \
1634 jobject obj, jclass clazz, jmethodID methodID, jvalue* args) \
1636 CHECK_JNI_ENTRY(kFlag_Default, "ELcm.", env, obj, clazz, methodID); /* TODO: args! */ \
1637 sc.checkSig(methodID, _retsig, false); \
1638 sc.checkVirtualMethod(obj, methodID); \
1640 _retasgn baseEnv(env)->CallNonvirtual##_jname##MethodA(env, obj, clazz, methodID, args); \
1644 static _ctype Check_CallStatic##_jname##Method(JNIEnv* env, \
1645 jclass clazz, jmethodID methodID, ...) \
1647 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID); /* TODO: args! */ \
1648 sc.checkSig(methodID, _retsig, true); \
1649 sc.checkStaticMethod(clazz, methodID); \
1652 va_start(args, methodID); \
1653 _retasgn baseEnv(env)->CallStatic##_jname##MethodV(env, clazz, methodID, args); \
1657 static _ctype Check_CallStatic##_jname##MethodV(JNIEnv* env, \
1658 jclass clazz, jmethodID methodID, va_list args) \
1660 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID); /* TODO: args! */ \
1661 sc.checkSig(methodID, _retsig, true); \
1662 sc.checkStaticMethod(clazz, methodID); \
1664 _retasgn baseEnv(env)->CallStatic##_jname##MethodV(env, clazz, methodID, args); \
1667 static _ctype Check_CallStatic##_jname##MethodA(JNIEnv* env, \
1668 jclass clazz, jmethodID methodID, jvalue* args) \
1670 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID); /* TODO: args! */ \
1671 sc.checkSig(methodID, _retsig, true); \
1672 sc.checkStaticMethod(clazz, methodID); \
1674 _retasgn baseEnv(env)->CallStatic##_jname##MethodA(env, clazz, methodID, args); \
1678 #define NON_VOID_RETURN(_retsig, _ctype) return CHECK_JNI_EXIT(_retsig, (_ctype) result)
1679 #define VOID_RETURN CHECK_JNI_EXIT_VOID()
1681 CALL(jobject, Object, Object* result, result=(Object*), NON_VOID_RETURN("L", jobject), "L");
1682 CALL(jboolean, Boolean, jboolean result, result=, NON_VOID_RETURN("Z", jboolean), "Z");
1683 CALL(jbyte, Byte, jbyte result, result=, NON_VOID_RETURN("B", jbyte), "B");
1684 CALL(jchar, Char, jchar result, result=, NON_VOID_RETURN("C", jchar), "C");
1685 CALL(jshort, Short, jshort result, result=, NON_VOID_RETURN("S", jshort), "S");
1686 CALL(jint, Int, jint result, result=, NON_VOID_RETURN("I", jint), "I");
1687 CALL(jlong, Long, jlong result, result=, NON_VOID_RETURN("J", jlong), "J");
1688 CALL(jfloat, Float, jfloat result, result=, NON_VOID_RETURN("F", jfloat), "F");
1689 CALL(jdouble, Double, jdouble result, result=, NON_VOID_RETURN("D", jdouble), "D");
1690 CALL(void, Void, , , VOID_RETURN, "V");
1692 static jstring Check_NewString(JNIEnv* env, const jchar* unicodeChars, jsize len) {
1693 CHECK_JNI_ENTRY(kFlag_Default, "Epz", env, unicodeChars, len);
1694 return CHECK_JNI_EXIT("s", baseEnv(env)->NewString(env, unicodeChars, len));
1697 static jsize Check_GetStringLength(JNIEnv* env, jstring string) {
1698 CHECK_JNI_ENTRY(kFlag_CritOkay, "Es", env, string);
1699 return CHECK_JNI_EXIT("I", baseEnv(env)->GetStringLength(env, string));
1702 static const jchar* Check_GetStringChars(JNIEnv* env, jstring string, jboolean* isCopy) {
1703 CHECK_JNI_ENTRY(kFlag_CritOkay, "Esp", env, string, isCopy);
1704 const jchar* result = baseEnv(env)->GetStringChars(env, string, isCopy);
1705 if (gDvmJni.forceCopy && result != NULL) {
1706 ScopedCheckJniThreadState ts(env);
1707 StringObject* strObj = (StringObject*) dvmDecodeIndirectRef(dvmThreadSelf(), string);
1708 int byteCount = strObj->length() * 2;
1709 result = (const jchar*) GuardedCopy::create(result, byteCount, false);
1710 if (isCopy != NULL) {
1714 return CHECK_JNI_EXIT("p", result);
1717 static void Check_ReleaseStringChars(JNIEnv* env, jstring string, const jchar* chars) {
1718 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "Esp", env, string, chars);
1719 sc.checkNonNull(chars);
1720 if (gDvmJni.forceCopy) {
1721 if (!GuardedCopy::check(chars, false)) {
1722 ALOGE("JNI: failed guarded copy check in ReleaseStringChars");
1726 chars = (const jchar*) GuardedCopy::destroy((jchar*)chars);
1728 baseEnv(env)->ReleaseStringChars(env, string, chars);
1729 CHECK_JNI_EXIT_VOID();
1732 static jstring Check_NewStringUTF(JNIEnv* env, const char* bytes) {
1733 CHECK_JNI_ENTRY(kFlag_NullableUtf, "Eu", env, bytes); // TODO: show pointer and truncate string.
1734 return CHECK_JNI_EXIT("s", baseEnv(env)->NewStringUTF(env, bytes));
1737 static jsize Check_GetStringUTFLength(JNIEnv* env, jstring string) {
1738 CHECK_JNI_ENTRY(kFlag_CritOkay, "Es", env, string);
1739 return CHECK_JNI_EXIT("I", baseEnv(env)->GetStringUTFLength(env, string));
1742 static const char* Check_GetStringUTFChars(JNIEnv* env, jstring string, jboolean* isCopy) {
1743 CHECK_JNI_ENTRY(kFlag_CritOkay, "Esp", env, string, isCopy);
1744 const char* result = baseEnv(env)->GetStringUTFChars(env, string, isCopy);
1745 if (gDvmJni.forceCopy && result != NULL) {
1746 result = (const char*) GuardedCopy::create(result, strlen(result) + 1, false);
1747 if (isCopy != NULL) {
1751 return CHECK_JNI_EXIT("u", result); // TODO: show pointer and truncate string.
1754 static void Check_ReleaseStringUTFChars(JNIEnv* env, jstring string, const char* utf) {
1755 CHECK_JNI_ENTRY(kFlag_ExcepOkay | kFlag_Release, "Esu", env, string, utf); // TODO: show pointer and truncate string.
1756 if (gDvmJni.forceCopy) {
1757 if (!GuardedCopy::check(utf, false)) {
1758 ALOGE("JNI: failed guarded copy check in ReleaseStringUTFChars");
1762 utf = (const char*) GuardedCopy::destroy((char*)utf);
1764 baseEnv(env)->ReleaseStringUTFChars(env, string, utf);
1765 CHECK_JNI_EXIT_VOID();
1768 static jsize Check_GetArrayLength(JNIEnv* env, jarray array) {
1769 CHECK_JNI_ENTRY(kFlag_CritOkay, "Ea", env, array);
1770 return CHECK_JNI_EXIT("I", baseEnv(env)->GetArrayLength(env, array));
1773 static jobjectArray Check_NewObjectArray(JNIEnv* env, jsize length,
1774 jclass elementClass, jobject initialElement)
1776 CHECK_JNI_ENTRY(kFlag_Default, "EzcL", env, length, elementClass, initialElement);
1777 return CHECK_JNI_EXIT("a", baseEnv(env)->NewObjectArray(env, length, elementClass, initialElement));
1780 static jobject Check_GetObjectArrayElement(JNIEnv* env, jobjectArray array, jsize index) {
1781 CHECK_JNI_ENTRY(kFlag_Default, "EaI", env, array, index);
1782 return CHECK_JNI_EXIT("L", baseEnv(env)->GetObjectArrayElement(env, array, index));
1785 static void Check_SetObjectArrayElement(JNIEnv* env, jobjectArray array, jsize index, jobject value)
1787 CHECK_JNI_ENTRY(kFlag_Default, "EaIL", env, array, index, value);
1788 baseEnv(env)->SetObjectArrayElement(env, array, index, value);
1789 CHECK_JNI_EXIT_VOID();
1792 #define NEW_PRIMITIVE_ARRAY(_artype, _jname) \
1793 static _artype Check_New##_jname##Array(JNIEnv* env, jsize length) { \
1794 CHECK_JNI_ENTRY(kFlag_Default, "Ez", env, length); \
1795 return CHECK_JNI_EXIT("a", baseEnv(env)->New##_jname##Array(env, length)); \
1797 NEW_PRIMITIVE_ARRAY(jbooleanArray, Boolean);
1798 NEW_PRIMITIVE_ARRAY(jbyteArray, Byte);
1799 NEW_PRIMITIVE_ARRAY(jcharArray, Char);
1800 NEW_PRIMITIVE_ARRAY(jshortArray, Short);
1801 NEW_PRIMITIVE_ARRAY(jintArray, Int);
1802 NEW_PRIMITIVE_ARRAY(jlongArray, Long);
1803 NEW_PRIMITIVE_ARRAY(jfloatArray, Float);
1804 NEW_PRIMITIVE_ARRAY(jdoubleArray, Double);
1808 * Hack to allow forcecopy to work with jniGetNonMovableArrayElements.
1809 * The code deliberately uses an invalid sequence of operations, so we
1810 * need to pass it through unmodified. Review that code before making
1813 #define kNoCopyMagic 0xd5aab57f
1815 #define GET_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname) \
1816 static _ctype* Check_Get##_jname##ArrayElements(JNIEnv* env, \
1817 _ctype##Array array, jboolean* isCopy) \
1819 CHECK_JNI_ENTRY(kFlag_Default, "Eap", env, array, isCopy); \
1821 if (gDvmJni.forceCopy && isCopy != NULL) { \
1822 /* capture this before the base call tramples on it */ \
1823 noCopy = *(u4*) isCopy; \
1825 _ctype* result = baseEnv(env)->Get##_jname##ArrayElements(env, array, isCopy); \
1826 if (gDvmJni.forceCopy && result != NULL) { \
1827 if (noCopy == kNoCopyMagic) { \
1828 ALOGV("FC: not copying %p %x", array, noCopy); \
1830 result = (_ctype*) createGuardedPACopy(env, array, isCopy); \
1833 return CHECK_JNI_EXIT("p", result); \
1836 #define RELEASE_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname) \
1837 static void Check_Release##_jname##ArrayElements(JNIEnv* env, \
1838 _ctype##Array array, _ctype* elems, jint mode) \
1840 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "Eapr", env, array, elems, mode); \
1841 sc.checkNonNull(elems); \
1842 if (gDvmJni.forceCopy) { \
1843 if ((uintptr_t)elems == kNoCopyMagic) { \
1844 ALOGV("FC: not freeing %p", array); \
1845 elems = NULL; /* base JNI call doesn't currently need */ \
1847 elems = (_ctype*) releaseGuardedPACopy(env, array, elems, mode); \
1850 baseEnv(env)->Release##_jname##ArrayElements(env, array, elems, mode); \
1851 CHECK_JNI_EXIT_VOID(); \
1854 #define GET_PRIMITIVE_ARRAY_REGION(_ctype, _jname) \
1855 static void Check_Get##_jname##ArrayRegion(JNIEnv* env, \
1856 _ctype##Array array, jsize start, jsize len, _ctype* buf) { \
1857 CHECK_JNI_ENTRY(kFlag_Default, "EaIIp", env, array, start, len, buf); \
1858 baseEnv(env)->Get##_jname##ArrayRegion(env, array, start, len, buf); \
1859 CHECK_JNI_EXIT_VOID(); \
1862 #define SET_PRIMITIVE_ARRAY_REGION(_ctype, _jname) \
1863 static void Check_Set##_jname##ArrayRegion(JNIEnv* env, \
1864 _ctype##Array array, jsize start, jsize len, const _ctype* buf) { \
1865 CHECK_JNI_ENTRY(kFlag_Default, "EaIIp", env, array, start, len, buf); \
1866 baseEnv(env)->Set##_jname##ArrayRegion(env, array, start, len, buf); \
1867 CHECK_JNI_EXIT_VOID(); \
1870 #define PRIMITIVE_ARRAY_FUNCTIONS(_ctype, _jname, _typechar) \
1871 GET_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname); \
1872 RELEASE_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname); \
1873 GET_PRIMITIVE_ARRAY_REGION(_ctype, _jname); \
1874 SET_PRIMITIVE_ARRAY_REGION(_ctype, _jname);
1876 /* TODO: verify primitive array type matches call type */
1877 PRIMITIVE_ARRAY_FUNCTIONS(jboolean, Boolean, 'Z');
1878 PRIMITIVE_ARRAY_FUNCTIONS(jbyte, Byte, 'B');
1879 PRIMITIVE_ARRAY_FUNCTIONS(jchar, Char, 'C');
1880 PRIMITIVE_ARRAY_FUNCTIONS(jshort, Short, 'S');
1881 PRIMITIVE_ARRAY_FUNCTIONS(jint, Int, 'I');
1882 PRIMITIVE_ARRAY_FUNCTIONS(jlong, Long, 'J');
1883 PRIMITIVE_ARRAY_FUNCTIONS(jfloat, Float, 'F');
1884 PRIMITIVE_ARRAY_FUNCTIONS(jdouble, Double, 'D');
1886 static jint Check_RegisterNatives(JNIEnv* env, jclass clazz, const JNINativeMethod* methods,
1889 CHECK_JNI_ENTRY(kFlag_Default, "EcpI", env, clazz, methods, nMethods);
1890 return CHECK_JNI_EXIT("I", baseEnv(env)->RegisterNatives(env, clazz, methods, nMethods));
1893 static jint Check_UnregisterNatives(JNIEnv* env, jclass clazz) {
1894 CHECK_JNI_ENTRY(kFlag_Default, "Ec", env, clazz);
1895 return CHECK_JNI_EXIT("I", baseEnv(env)->UnregisterNatives(env, clazz));
1898 static jint Check_MonitorEnter(JNIEnv* env, jobject obj) {
1899 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj);
1900 return CHECK_JNI_EXIT("I", baseEnv(env)->MonitorEnter(env, obj));
1903 static jint Check_MonitorExit(JNIEnv* env, jobject obj) {
1904 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, obj);
1905 return CHECK_JNI_EXIT("I", baseEnv(env)->MonitorExit(env, obj));
1908 static jint Check_GetJavaVM(JNIEnv *env, JavaVM **vm) {
1909 CHECK_JNI_ENTRY(kFlag_Default, "Ep", env, vm);
1910 return CHECK_JNI_EXIT("I", baseEnv(env)->GetJavaVM(env, vm));
1913 static void Check_GetStringRegion(JNIEnv* env, jstring str, jsize start, jsize len, jchar* buf) {
1914 CHECK_JNI_ENTRY(kFlag_CritOkay, "EsIIp", env, str, start, len, buf);
1915 baseEnv(env)->GetStringRegion(env, str, start, len, buf);
1916 CHECK_JNI_EXIT_VOID();
1919 static void Check_GetStringUTFRegion(JNIEnv* env, jstring str, jsize start, jsize len, char* buf) {
1920 CHECK_JNI_ENTRY(kFlag_CritOkay, "EsIIp", env, str, start, len, buf);
1921 baseEnv(env)->GetStringUTFRegion(env, str, start, len, buf);
1922 CHECK_JNI_EXIT_VOID();
1925 static void* Check_GetPrimitiveArrayCritical(JNIEnv* env, jarray array, jboolean* isCopy) {
1926 CHECK_JNI_ENTRY(kFlag_CritGet, "Eap", env, array, isCopy);
1927 void* result = baseEnv(env)->GetPrimitiveArrayCritical(env, array, isCopy);
1928 if (gDvmJni.forceCopy && result != NULL) {
1929 result = createGuardedPACopy(env, array, isCopy);
1931 return CHECK_JNI_EXIT("p", result);
1934 static void Check_ReleasePrimitiveArrayCritical(JNIEnv* env, jarray array, void* carray, jint mode)
1936 CHECK_JNI_ENTRY(kFlag_CritRelease | kFlag_ExcepOkay, "Eapr", env, array, carray, mode);
1937 sc.checkNonNull(carray);
1938 if (gDvmJni.forceCopy) {
1939 carray = releaseGuardedPACopy(env, array, carray, mode);
1941 baseEnv(env)->ReleasePrimitiveArrayCritical(env, array, carray, mode);
1942 CHECK_JNI_EXIT_VOID();
1945 static const jchar* Check_GetStringCritical(JNIEnv* env, jstring string, jboolean* isCopy) {
1946 CHECK_JNI_ENTRY(kFlag_CritGet, "Esp", env, string, isCopy);
1947 const jchar* result = baseEnv(env)->GetStringCritical(env, string, isCopy);
1948 if (gDvmJni.forceCopy && result != NULL) {
1949 ScopedCheckJniThreadState ts(env);
1950 StringObject* strObj = (StringObject*) dvmDecodeIndirectRef(dvmThreadSelf(), string);
1951 int byteCount = strObj->length() * 2;
1952 result = (const jchar*) GuardedCopy::create(result, byteCount, false);
1953 if (isCopy != NULL) {
1957 return CHECK_JNI_EXIT("p", result);
1960 static void Check_ReleaseStringCritical(JNIEnv* env, jstring string, const jchar* carray) {
1961 CHECK_JNI_ENTRY(kFlag_CritRelease | kFlag_ExcepOkay, "Esp", env, string, carray);
1962 sc.checkNonNull(carray);
1963 if (gDvmJni.forceCopy) {
1964 if (!GuardedCopy::check(carray, false)) {
1965 ALOGE("JNI: failed guarded copy check in ReleaseStringCritical");
1969 carray = (const jchar*) GuardedCopy::destroy((jchar*)carray);
1971 baseEnv(env)->ReleaseStringCritical(env, string, carray);
1972 CHECK_JNI_EXIT_VOID();
1975 static jweak Check_NewWeakGlobalRef(JNIEnv* env, jobject obj) {
1976 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj);
1977 return CHECK_JNI_EXIT("L", baseEnv(env)->NewWeakGlobalRef(env, obj));
1980 static void Check_DeleteWeakGlobalRef(JNIEnv* env, jweak obj) {
1981 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, obj);
1982 baseEnv(env)->DeleteWeakGlobalRef(env, obj);
1983 CHECK_JNI_EXIT_VOID();
1986 static jboolean Check_ExceptionCheck(JNIEnv* env) {
1987 CHECK_JNI_ENTRY(kFlag_CritOkay | kFlag_ExcepOkay, "E", env);
1988 return CHECK_JNI_EXIT("b", baseEnv(env)->ExceptionCheck(env));
1991 static jobjectRefType Check_GetObjectRefType(JNIEnv* env, jobject obj) {
1992 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj);
1993 // TODO: proper decoding of jobjectRefType!
1994 return CHECK_JNI_EXIT("I", baseEnv(env)->GetObjectRefType(env, obj));
1997 static jobject Check_NewDirectByteBuffer(JNIEnv* env, void* address, jlong capacity) {
1998 CHECK_JNI_ENTRY(kFlag_Default, "EpJ", env, address, capacity);
1999 return CHECK_JNI_EXIT("L", baseEnv(env)->NewDirectByteBuffer(env, address, capacity));
2002 static void* Check_GetDirectBufferAddress(JNIEnv* env, jobject buf) {
2003 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, buf);
2004 // TODO: check that 'buf' is a java.nio.Buffer.
2005 return CHECK_JNI_EXIT("p", baseEnv(env)->GetDirectBufferAddress(env, buf));
2008 static jlong Check_GetDirectBufferCapacity(JNIEnv* env, jobject buf) {
2009 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, buf);
2010 // TODO: check that 'buf' is a java.nio.Buffer.
2011 return CHECK_JNI_EXIT("J", baseEnv(env)->GetDirectBufferCapacity(env, buf));
2016 * ===========================================================================
2017 * JNI invocation functions
2018 * ===========================================================================
2021 static jint Check_DestroyJavaVM(JavaVM* vm) {
2022 ScopedCheck sc(false, __FUNCTION__);
2023 sc.check(true, "v", vm);
2024 return CHECK_JNI_EXIT("I", baseVm(vm)->DestroyJavaVM(vm));
2027 static jint Check_AttachCurrentThread(JavaVM* vm, JNIEnv** p_env, void* thr_args) {
2028 ScopedCheck sc(false, __FUNCTION__);
2029 sc.check(true, "vpt", vm, p_env, thr_args);
2030 return CHECK_JNI_EXIT("I", baseVm(vm)->AttachCurrentThread(vm, p_env, thr_args));
2033 static jint Check_AttachCurrentThreadAsDaemon(JavaVM* vm, JNIEnv** p_env, void* thr_args) {
2034 ScopedCheck sc(false, __FUNCTION__);
2035 sc.check(true, "vpt", vm, p_env, thr_args);
2036 return CHECK_JNI_EXIT("I", baseVm(vm)->AttachCurrentThreadAsDaemon(vm, p_env, thr_args));
2039 static jint Check_DetachCurrentThread(JavaVM* vm) {
2040 ScopedCheck sc(true, __FUNCTION__);
2041 sc.check(true, "v", vm);
2042 return CHECK_JNI_EXIT("I", baseVm(vm)->DetachCurrentThread(vm));
2045 static jint Check_GetEnv(JavaVM* vm, void** env, jint version) {
2046 ScopedCheck sc(true, __FUNCTION__);
2047 sc.check(true, "v", vm);
2048 return CHECK_JNI_EXIT("I", baseVm(vm)->GetEnv(vm, env, version));
2053 * ===========================================================================
2055 * ===========================================================================
2058 static const struct JNINativeInterface gCheckNativeInterface = {
2069 Check_FromReflectedMethod,
2070 Check_FromReflectedField,
2071 Check_ToReflectedMethod,
2073 Check_GetSuperclass,
2074 Check_IsAssignableFrom,
2076 Check_ToReflectedField,
2080 Check_ExceptionOccurred,
2081 Check_ExceptionDescribe,
2082 Check_ExceptionClear,
2085 Check_PushLocalFrame,
2086 Check_PopLocalFrame,
2089 Check_DeleteGlobalRef,
2090 Check_DeleteLocalRef,
2093 Check_EnsureLocalCapacity,
2100 Check_GetObjectClass,
2105 Check_CallObjectMethod,
2106 Check_CallObjectMethodV,
2107 Check_CallObjectMethodA,
2108 Check_CallBooleanMethod,
2109 Check_CallBooleanMethodV,
2110 Check_CallBooleanMethodA,
2111 Check_CallByteMethod,
2112 Check_CallByteMethodV,
2113 Check_CallByteMethodA,
2114 Check_CallCharMethod,
2115 Check_CallCharMethodV,
2116 Check_CallCharMethodA,
2117 Check_CallShortMethod,
2118 Check_CallShortMethodV,
2119 Check_CallShortMethodA,
2120 Check_CallIntMethod,
2121 Check_CallIntMethodV,
2122 Check_CallIntMethodA,
2123 Check_CallLongMethod,
2124 Check_CallLongMethodV,
2125 Check_CallLongMethodA,
2126 Check_CallFloatMethod,
2127 Check_CallFloatMethodV,
2128 Check_CallFloatMethodA,
2129 Check_CallDoubleMethod,
2130 Check_CallDoubleMethodV,
2131 Check_CallDoubleMethodA,
2132 Check_CallVoidMethod,
2133 Check_CallVoidMethodV,
2134 Check_CallVoidMethodA,
2136 Check_CallNonvirtualObjectMethod,
2137 Check_CallNonvirtualObjectMethodV,
2138 Check_CallNonvirtualObjectMethodA,
2139 Check_CallNonvirtualBooleanMethod,
2140 Check_CallNonvirtualBooleanMethodV,
2141 Check_CallNonvirtualBooleanMethodA,
2142 Check_CallNonvirtualByteMethod,
2143 Check_CallNonvirtualByteMethodV,
2144 Check_CallNonvirtualByteMethodA,
2145 Check_CallNonvirtualCharMethod,
2146 Check_CallNonvirtualCharMethodV,
2147 Check_CallNonvirtualCharMethodA,
2148 Check_CallNonvirtualShortMethod,
2149 Check_CallNonvirtualShortMethodV,
2150 Check_CallNonvirtualShortMethodA,
2151 Check_CallNonvirtualIntMethod,
2152 Check_CallNonvirtualIntMethodV,
2153 Check_CallNonvirtualIntMethodA,
2154 Check_CallNonvirtualLongMethod,
2155 Check_CallNonvirtualLongMethodV,
2156 Check_CallNonvirtualLongMethodA,
2157 Check_CallNonvirtualFloatMethod,
2158 Check_CallNonvirtualFloatMethodV,
2159 Check_CallNonvirtualFloatMethodA,
2160 Check_CallNonvirtualDoubleMethod,
2161 Check_CallNonvirtualDoubleMethodV,
2162 Check_CallNonvirtualDoubleMethodA,
2163 Check_CallNonvirtualVoidMethod,
2164 Check_CallNonvirtualVoidMethodV,
2165 Check_CallNonvirtualVoidMethodA,
2169 Check_GetObjectField,
2170 Check_GetBooleanField,
2173 Check_GetShortField,
2176 Check_GetFloatField,
2177 Check_GetDoubleField,
2178 Check_SetObjectField,
2179 Check_SetBooleanField,
2182 Check_SetShortField,
2185 Check_SetFloatField,
2186 Check_SetDoubleField,
2188 Check_GetStaticMethodID,
2190 Check_CallStaticObjectMethod,
2191 Check_CallStaticObjectMethodV,
2192 Check_CallStaticObjectMethodA,
2193 Check_CallStaticBooleanMethod,
2194 Check_CallStaticBooleanMethodV,
2195 Check_CallStaticBooleanMethodA,
2196 Check_CallStaticByteMethod,
2197 Check_CallStaticByteMethodV,
2198 Check_CallStaticByteMethodA,
2199 Check_CallStaticCharMethod,
2200 Check_CallStaticCharMethodV,
2201 Check_CallStaticCharMethodA,
2202 Check_CallStaticShortMethod,
2203 Check_CallStaticShortMethodV,
2204 Check_CallStaticShortMethodA,
2205 Check_CallStaticIntMethod,
2206 Check_CallStaticIntMethodV,
2207 Check_CallStaticIntMethodA,
2208 Check_CallStaticLongMethod,
2209 Check_CallStaticLongMethodV,
2210 Check_CallStaticLongMethodA,
2211 Check_CallStaticFloatMethod,
2212 Check_CallStaticFloatMethodV,
2213 Check_CallStaticFloatMethodA,
2214 Check_CallStaticDoubleMethod,
2215 Check_CallStaticDoubleMethodV,
2216 Check_CallStaticDoubleMethodA,
2217 Check_CallStaticVoidMethod,
2218 Check_CallStaticVoidMethodV,
2219 Check_CallStaticVoidMethodA,
2221 Check_GetStaticFieldID,
2223 Check_GetStaticObjectField,
2224 Check_GetStaticBooleanField,
2225 Check_GetStaticByteField,
2226 Check_GetStaticCharField,
2227 Check_GetStaticShortField,
2228 Check_GetStaticIntField,
2229 Check_GetStaticLongField,
2230 Check_GetStaticFloatField,
2231 Check_GetStaticDoubleField,
2233 Check_SetStaticObjectField,
2234 Check_SetStaticBooleanField,
2235 Check_SetStaticByteField,
2236 Check_SetStaticCharField,
2237 Check_SetStaticShortField,
2238 Check_SetStaticIntField,
2239 Check_SetStaticLongField,
2240 Check_SetStaticFloatField,
2241 Check_SetStaticDoubleField,
2245 Check_GetStringLength,
2246 Check_GetStringChars,
2247 Check_ReleaseStringChars,
2250 Check_GetStringUTFLength,
2251 Check_GetStringUTFChars,
2252 Check_ReleaseStringUTFChars,
2254 Check_GetArrayLength,
2255 Check_NewObjectArray,
2256 Check_GetObjectArrayElement,
2257 Check_SetObjectArrayElement,
2259 Check_NewBooleanArray,
2262 Check_NewShortArray,
2265 Check_NewFloatArray,
2266 Check_NewDoubleArray,
2268 Check_GetBooleanArrayElements,
2269 Check_GetByteArrayElements,
2270 Check_GetCharArrayElements,
2271 Check_GetShortArrayElements,
2272 Check_GetIntArrayElements,
2273 Check_GetLongArrayElements,
2274 Check_GetFloatArrayElements,
2275 Check_GetDoubleArrayElements,
2277 Check_ReleaseBooleanArrayElements,
2278 Check_ReleaseByteArrayElements,
2279 Check_ReleaseCharArrayElements,
2280 Check_ReleaseShortArrayElements,
2281 Check_ReleaseIntArrayElements,
2282 Check_ReleaseLongArrayElements,
2283 Check_ReleaseFloatArrayElements,
2284 Check_ReleaseDoubleArrayElements,
2286 Check_GetBooleanArrayRegion,
2287 Check_GetByteArrayRegion,
2288 Check_GetCharArrayRegion,
2289 Check_GetShortArrayRegion,
2290 Check_GetIntArrayRegion,
2291 Check_GetLongArrayRegion,
2292 Check_GetFloatArrayRegion,
2293 Check_GetDoubleArrayRegion,
2294 Check_SetBooleanArrayRegion,
2295 Check_SetByteArrayRegion,
2296 Check_SetCharArrayRegion,
2297 Check_SetShortArrayRegion,
2298 Check_SetIntArrayRegion,
2299 Check_SetLongArrayRegion,
2300 Check_SetFloatArrayRegion,
2301 Check_SetDoubleArrayRegion,
2303 Check_RegisterNatives,
2304 Check_UnregisterNatives,
2311 Check_GetStringRegion,
2312 Check_GetStringUTFRegion,
2314 Check_GetPrimitiveArrayCritical,
2315 Check_ReleasePrimitiveArrayCritical,
2317 Check_GetStringCritical,
2318 Check_ReleaseStringCritical,
2320 Check_NewWeakGlobalRef,
2321 Check_DeleteWeakGlobalRef,
2323 Check_ExceptionCheck,
2325 Check_NewDirectByteBuffer,
2326 Check_GetDirectBufferAddress,
2327 Check_GetDirectBufferCapacity,
2329 Check_GetObjectRefType
2332 static const struct JNIInvokeInterface gCheckInvokeInterface = {
2337 Check_DestroyJavaVM,
2338 Check_AttachCurrentThread,
2339 Check_DetachCurrentThread,
2343 Check_AttachCurrentThreadAsDaemon,
2347 * Replace the normal table with the checked table.
2349 void dvmUseCheckedJniEnv(JNIEnvExt* pEnv) {
2350 assert(pEnv->funcTable != &gCheckNativeInterface);
2351 pEnv->baseFuncTable = pEnv->funcTable;
2352 pEnv->funcTable = &gCheckNativeInterface;
2356 * Replace the normal table with the checked table.
2358 void dvmUseCheckedJniVm(JavaVMExt* pVm) {
2359 assert(pVm->funcTable != &gCheckInvokeInterface);
2360 pVm->baseFuncTable = pVm->funcTable;
2361 pVm->funcTable = &gCheckInvokeInterface;