CheckJni.cpp revision 363e154170d0879ccebf4160f8d57433d40673a2
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 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 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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. 15 */ 16 17/* 18 * Support for -Xcheck:jni (the "careful" version of the JNI interfaces). 19 * 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. 24 */ 25 26#include "Dalvik.h" 27#include "JniInternal.h" 28 29#include <sys/mman.h> 30#include <zlib.h> 31 32/* 33 * Abort if we are configured to bail out on JNI warnings. 34 */ 35static void abortMaybe() { 36 if (!gDvmJni.warnOnly) { 37 dvmDumpThread(dvmThreadSelf(), false); 38 dvmAbort(); 39 } 40} 41 42/* 43 * =========================================================================== 44 * JNI call bridge wrapper 45 * =========================================================================== 46 */ 47 48/* 49 * Check the result of a native method call that returns an object reference. 50 * 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. 54 * 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 60 * testing for. 61 * 62 * At this point, pResult->l has already been converted to an object pointer. 63 */ 64static void checkCallResultCommon(const u4* args, const JValue* pResult, 65 const Method* method, Thread* self) 66{ 67 assert(pResult->l != NULL); 68 const Object* resultObj = (const Object*) pResult->l; 69 70 if (resultObj == kInvalidIndirectRefObject) { 71 LOGW("JNI WARNING: invalid reference returned from native code"); 72 const Method* method = dvmGetCurrentJNIMethod(); 73 char* desc = dexProtoCopyMethodDescriptor(&method->prototype); 74 LOGW(" in %s.%s:%s", method->clazz->descriptor, method->name, desc); 75 free(desc); 76 abortMaybe(); 77 return; 78 } 79 80 ClassObject* objClazz = resultObj->clazz; 81 82 /* 83 * Make sure that pResult->l is an instance of the type this 84 * method was expected to return. 85 */ 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 LOGV("Check %s.%s: %s io %s (FAST-OK)", 91 method->clazz->descriptor, method->name, objType, declType); 92 } else { 93 /* 94 * Names didn't match. We need to resolve declType in the context 95 * of method->clazz->classLoader, and compare the class objects 96 * for equality. 97 * 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. 103 */ 104 ClassObject* declClazz = dvmFindClassNoInit(declType, method->clazz->classLoader); 105 if (declClazz == NULL) { 106 LOGW("JNI WARNING: method declared to return '%s' returned '%s'", 107 declType, objType); 108 LOGW(" failed in %s.%s ('%s' not found)", 109 method->clazz->descriptor, method->name, declType); 110 abortMaybe(); 111 return; 112 } 113 if (!dvmInstanceof(objClazz, declClazz)) { 114 LOGW("JNI WARNING: method declared to return '%s' returned '%s'", 115 declType, objType); 116 LOGW(" failed in %s.%s", 117 method->clazz->descriptor, method->name); 118 abortMaybe(); 119 return; 120 } else { 121 LOGV("Check %s.%s: %s io %s (SLOW-OK)", 122 method->clazz->descriptor, method->name, objType, declType); 123 } 124 } 125} 126 127/* 128 * Determine if we need to check the return type coming out of the call. 129 * 130 * (We don't simply do this at the top of checkCallResultCommon() because 131 * this is on the critical path for native method calls.) 132 */ 133static inline bool callNeedsCheck(const u4* args, JValue* pResult, 134 const Method* method, Thread* self) 135{ 136 return (method->shorty[0] == 'L' && !dvmCheckException(self) && pResult->l != NULL); 137} 138 139/* 140 * Check a call into native code. 141 */ 142void dvmCheckCallJNIMethod(const u4* args, JValue* pResult, 143 const Method* method, Thread* self) 144{ 145 dvmCallJNIMethod(args, pResult, method, self); 146 if (callNeedsCheck(args, pResult, method, self)) { 147 checkCallResultCommon(args, pResult, method, self); 148 } 149} 150 151/* 152 * =========================================================================== 153 * JNI function helpers 154 * =========================================================================== 155 */ 156 157static inline const JNINativeInterface* baseEnv(JNIEnv* env) { 158 return ((JNIEnvExt*) env)->baseFuncTable; 159} 160 161static inline const JNIInvokeInterface* baseVm(JavaVM* vm) { 162 return ((JavaVMExt*) vm)->baseFuncTable; 163} 164 165class ScopedJniThreadState { 166public: 167 explicit ScopedJniThreadState(JNIEnv* env) { 168 dvmChangeStatus(NULL, THREAD_RUNNING); 169 } 170 171 ~ScopedJniThreadState() { 172 dvmChangeStatus(NULL, THREAD_NATIVE); 173 } 174 175private: 176 // Disallow copy and assignment. 177 ScopedJniThreadState(const ScopedJniThreadState&); 178 void operator=(const ScopedJniThreadState&); 179}; 180 181/* 182 * Flags passed into ScopedCheck. 183 */ 184#define kFlag_Default 0x0000 185 186#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 */ 191 192#define kFlag_ExcepBad 0x0000 /* raised exceptions are bad */ 193#define kFlag_ExcepOkay 0x0004 /* ...okay */ 194 195#define kFlag_Release 0x0010 /* are we in a non-critical release function? */ 196#define kFlag_NullableUtf 0x0020 /* are our UTF parameters nullable? */ 197 198#define kFlag_Invocation 0x8000 /* Part of the invocation interface (JavaVM*) */ 199 200static const char* indirectRefKindName(IndirectRef iref) 201{ 202 return indirectRefKindToString(indirectRefKind(iref)); 203} 204 205class ScopedCheck { 206public: 207 // For JNIEnv* functions. 208 explicit ScopedCheck(JNIEnv* env, int flags, const char* functionName) { 209 init(env, flags, functionName, true); 210 checkThread(flags); 211 } 212 213 // For JavaVM* functions. 214 explicit ScopedCheck(bool hasMethod, const char* functionName) { 215 init(NULL, kFlag_Invocation, functionName, hasMethod); 216 } 217 218 /* 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. 224 * 225 * This is incorrect and could cause strange behavior or compatibility 226 * problems, so we want to screen that out here. 227 * 228 * We expect "fully-qualified" class names, like "java/lang/Thread" or 229 * "[Ljava/lang/Object;". 230 */ 231 void checkClassName(const char* className) { 232 if (!dexIsValidClassName(className, false)) { 233 LOGW("JNI WARNING: illegal class name '%s' (%s)", className, mFunctionName); 234 LOGW(" (should be formed like 'dalvik/system/DexFile')"); 235 LOGW(" or '[Ldalvik/system/DexFile;' or '[[B')"); 236 abortMaybe(); 237 } 238 } 239 240 /* 241 * Verify that the field is of the appropriate type. If the field has an 242 * object type, "jobj" is the object we're trying to assign into it. 243 * 244 * Works for both static and instance fields. 245 */ 246 void checkFieldType(jobject jobj, jfieldID fieldID, PrimitiveType prim, bool isStatic) { 247 if (fieldID == NULL) { 248 LOGW("JNI WARNING: null field ID"); 249 showLocation(); 250 abortMaybe(); 251 } 252 253 bool printWarn = false; 254 Field* field = (Field*) fieldID; 255 if ((field->signature[0] == 'L' || field->signature[0] == '[') && jobj != NULL) { 256 ScopedJniThreadState ts(mEnv); 257 Object* obj = dvmDecodeIndirectRef(mEnv, jobj); 258 /* 259 * If jobj is a weak global ref whose referent has been cleared, 260 * obj will be NULL. Otherwise, obj should always be non-NULL 261 * and valid. 262 */ 263 if (obj != NULL && !dvmIsValidObject(obj)) { 264 LOGW("JNI WARNING: field operation on invalid %s reference (%p)", 265 indirectRefKindName(jobj), jobj); 266 printWarn = true; 267 } else { 268 ClassObject* fieldClass = dvmFindLoadedClass(field->signature); 269 ClassObject* objClass = obj->clazz; 270 271 assert(fieldClass != NULL); 272 assert(objClass != NULL); 273 274 if (!dvmInstanceof(objClass, fieldClass)) { 275 LOGW("JNI WARNING: set field '%s' expected type %s, got %s", 276 field->name, field->signature, objClass->descriptor); 277 printWarn = true; 278 } 279 } 280 } else if (dexGetPrimitiveTypeFromDescriptorChar(field->signature[0]) != prim) { 281 LOGW("JNI WARNING: set field '%s' expected type %s, got %s", 282 field->name, field->signature, primitiveTypeToName(prim)); 283 printWarn = true; 284 } else if (isStatic && !dvmIsStaticField(field)) { 285 if (isStatic) { 286 LOGW("JNI WARNING: accessing non-static field %s as static", field->name); 287 } else { 288 LOGW("JNI WARNING: accessing static field %s as non-static", field->name); 289 } 290 printWarn = true; 291 } 292 293 if (printWarn) { 294 showLocation(); 295 abortMaybe(); 296 } 297 } 298 299 /* 300 * Verify that this instance field ID is valid for this object. 301 * 302 * Assumes "jobj" has already been validated. 303 */ 304 void checkInstanceFieldID(jobject jobj, jfieldID fieldID) { 305 ScopedJniThreadState ts(mEnv); 306 307 Object* obj = dvmDecodeIndirectRef(mEnv, jobj); 308 if (!dvmIsValidObject(obj)) { 309 LOGW("JNI ERROR: field operation on invalid reference (%p)", jobj); 310 dvmAbort(); 311 } 312 313 /* 314 * Check this class and all of its superclasses for a matching field. 315 * Don't need to scan interfaces. 316 */ 317 ClassObject* clazz = obj->clazz; 318 while (clazz != NULL) { 319 if ((InstField*) fieldID >= clazz->ifields && 320 (InstField*) fieldID < clazz->ifields + clazz->ifieldCount) { 321 return; 322 } 323 324 clazz = clazz->super; 325 } 326 327 LOGW("JNI WARNING: instance fieldID %p not valid for class %s", 328 fieldID, obj->clazz->descriptor); 329 showLocation(); 330 abortMaybe(); 331 } 332 333 /* 334 * Verify that the pointer value is non-NULL. 335 */ 336 void checkNonNull(const void* ptr) { 337 if (ptr == NULL) { 338 LOGW("JNI WARNING: invalid null pointer (%s)", mFunctionName); 339 abortMaybe(); 340 } 341 } 342 343 /* 344 * Verify that the method's return type matches the type of call. 345 * 'expectedType' will be "L" for all objects, including arrays. 346 */ 347 void checkSig(jmethodID methodID, const char* expectedType, bool isStatic) { 348 const Method* method = (const Method*) methodID; 349 bool printWarn = false; 350 351 if (*expectedType != method->shorty[0]) { 352 LOGW("JNI WARNING: expected return type '%s'", expectedType); 353 printWarn = true; 354 } else if (isStatic && !dvmIsStaticMethod(method)) { 355 if (isStatic) { 356 LOGW("JNI WARNING: calling non-static method with static call"); 357 } else { 358 LOGW("JNI WARNING: calling static method with non-static call"); 359 } 360 printWarn = true; 361 } 362 363 if (printWarn) { 364 char* desc = dexProtoCopyMethodDescriptor(&method->prototype); 365 LOGW(" calling %s.%s %s", method->clazz->descriptor, method->name, desc); 366 free(desc); 367 showLocation(); 368 abortMaybe(); 369 } 370 } 371 372 /* 373 * Verify that this static field ID is valid for this class. 374 * 375 * Assumes "jclazz" has already been validated. 376 */ 377 void checkStaticFieldID(jclass jclazz, jfieldID fieldID) { 378 ScopedJniThreadState ts(mEnv); 379 ClassObject* clazz = (ClassObject*) dvmDecodeIndirectRef(mEnv, jclazz); 380 StaticField* base = &clazz->sfields[0]; 381 int fieldCount = clazz->sfieldCount; 382 if ((StaticField*) fieldID < base || (StaticField*) fieldID >= base + fieldCount) { 383 LOGW("JNI WARNING: static fieldID %p not valid for class %s", 384 fieldID, clazz->descriptor); 385 LOGW(" base=%p count=%d", base, fieldCount); 386 showLocation(); 387 abortMaybe(); 388 } 389 } 390 391 /* 392 * Verify that "methodID" is appropriate for "clazz". 393 * 394 * A mismatch isn't dangerous, because the jmethodID defines the class. In 395 * fact, jclazz is unused in the implementation. It's best if we don't 396 * allow bad code in the system though. 397 * 398 * Instances of "jclazz" must be instances of the method's declaring class. 399 */ 400 void checkStaticMethod(jclass jclazz, jmethodID methodID) { 401 ScopedJniThreadState ts(mEnv); 402 403 ClassObject* clazz = (ClassObject*) dvmDecodeIndirectRef(mEnv, jclazz); 404 const Method* method = (const Method*) methodID; 405 406 if (!dvmInstanceof(clazz, method->clazz)) { 407 LOGW("JNI WARNING: can't call static %s.%s on class %s", 408 method->clazz->descriptor, method->name, clazz->descriptor); 409 showLocation(); 410 // no abort? 411 } 412 } 413 414 /* 415 * Verify that "methodID" is appropriate for "jobj". 416 * 417 * Make sure the object is an instance of the method's declaring class. 418 * (Note the methodID might point to a declaration in an interface; this 419 * will be handled automatically by the instanceof check.) 420 */ 421 void checkVirtualMethod(jobject jobj, jmethodID methodID) { 422 ScopedJniThreadState ts(mEnv); 423 424 Object* obj = dvmDecodeIndirectRef(mEnv, jobj); 425 const Method* method = (const Method*) methodID; 426 427 if (!dvmInstanceof(obj->clazz, method->clazz)) { 428 LOGW("JNI WARNING: can't call %s.%s on instance of %s", 429 method->clazz->descriptor, method->name, obj->clazz->descriptor); 430 showLocation(); 431 abortMaybe(); 432 } 433 } 434 435 /** 436 * The format string is a sequence of the following characters, 437 * and must be followed by arguments of the corresponding types 438 * in the same order. 439 * 440 * Java primitive types: 441 * B - jbyte 442 * C - jchar 443 * D - jdouble 444 * F - jfloat 445 * I - jint 446 * J - jlong 447 * S - jshort 448 * Z - jboolean (shown as true and false) 449 * V - void 450 * 451 * Java reference types: 452 * L - jobject 453 * a - jarray 454 * c - jclass 455 * s - jstring 456 * 457 * JNI types: 458 * b - jboolean (shown as JNI_TRUE and JNI_FALSE) 459 * f - jfieldID 460 * m - jmethodID 461 * p - void* 462 * r - jint (for release mode arguments) 463 * u - const char* (modified UTF-8) 464 * z - jsize (for lengths; use i if negative values are okay) 465 * v - JavaVM* 466 * E - JNIEnv* 467 * . - no argument; just print "..." (used for varargs JNI calls) 468 * 469 * Use the kFlag_NullableUtf flag where 'u' field(s) are nullable. 470 */ 471 void check(bool entry, const char* fmt0, ...) { 472 va_list ap; 473 474 bool shouldTrace = false; 475 const Method* method = NULL; 476 if ((gDvm.jniTrace || gDvmJni.logThirdPartyJni) && mHasMethod) { 477 // We need to guard some of the invocation interface's calls: a bad caller might 478 // use DetachCurrentThread or GetEnv on a thread that's not yet attached. 479 if ((mFlags & kFlag_Invocation) == 0 || dvmThreadSelf() != NULL) { 480 method = dvmGetCurrentJNIMethod(); 481 } 482 } 483 if (method != NULL) { 484 // If both "-Xcheck:jni" and "-Xjnitrace:" are enabled, we print trace messages 485 // when a native method that matches the Xjnitrace argument calls a JNI function 486 // such as NewByteArray. 487 if (gDvm.jniTrace && strstr(method->clazz->descriptor, gDvm.jniTrace) != NULL) { 488 shouldTrace = true; 489 } 490 // If -Xjniopts:logThirdPartyJni is on, we want to log any JNI function calls 491 // made by a third-party native method. 492 if (gDvmJni.logThirdPartyJni) { 493 shouldTrace |= method->shouldTrace; 494 } 495 } 496 497 if (shouldTrace) { 498 va_start(ap, fmt0); 499 std::string msg; 500 for (const char* fmt = fmt0; *fmt;) { 501 char ch = *fmt++; 502 if (ch == 'B') { // jbyte 503 jbyte b = va_arg(ap, int); 504 if (b >= 0 && b < 10) { 505 StringAppendF(&msg, "%d", b); 506 } else { 507 StringAppendF(&msg, "%#x (%d)", b, b); 508 } 509 } else if (ch == 'C') { // jchar 510 jchar c = va_arg(ap, int); 511 if (c < 0x7f && c >= ' ') { 512 StringAppendF(&msg, "U+%x ('%c')", c, c); 513 } else { 514 StringAppendF(&msg, "U+%x", c); 515 } 516 } else if (ch == 'F' || ch == 'D') { // jfloat, jdouble 517 StringAppendF(&msg, "%g", va_arg(ap, double)); 518 } else if (ch == 'I' || ch == 'S') { // jint, jshort 519 StringAppendF(&msg, "%d", va_arg(ap, int)); 520 } else if (ch == 'J') { // jlong 521 StringAppendF(&msg, "%lld", va_arg(ap, jlong)); 522 } else if (ch == 'Z') { // jboolean 523 StringAppendF(&msg, "%s", va_arg(ap, int) ? "true" : "false"); 524 } else if (ch == 'V') { // void 525 msg += "void"; 526 } else if (ch == 'v') { // JavaVM* 527 JavaVM* vm = va_arg(ap, JavaVM*); 528 StringAppendF(&msg, "(JavaVM*)%p", vm); 529 } else if (ch == 'E') { // JNIEnv* 530 JNIEnv* env = va_arg(ap, JNIEnv*); 531 StringAppendF(&msg, "(JNIEnv*)%p", env); 532 } else if (ch == 'L' || ch == 'a' || ch == 's') { // jobject, jarray, jstring 533 // For logging purposes, these are identical. 534 jobject o = va_arg(ap, jobject); 535 if (o == NULL) { 536 msg += "NULL"; 537 } else { 538 StringAppendF(&msg, "%p", o); 539 } 540 } else if (ch == 'b') { // jboolean (JNI-style) 541 jboolean b = va_arg(ap, int); 542 msg += (b ? "JNI_TRUE" : "JNI_FALSE"); 543 } else if (ch == 'c') { // jclass 544 jclass jc = va_arg(ap, jclass); 545 Object* c = dvmDecodeIndirectRef(mEnv, jc); 546 if (c == NULL) { 547 msg += "NULL"; 548 } else if (c == kInvalidIndirectRefObject || !dvmIsValidObject(c)) { 549 StringAppendF(&msg, "%p(INVALID)", jc); 550 } else { 551 std::string className(dvmHumanReadableType(c)); 552 StringAppendF(&msg, "%s", className.c_str()); 553 if (!entry) { 554 StringAppendF(&msg, " (%p)", jc); 555 } 556 } 557 } else if (ch == 'f') { // jfieldID 558 jfieldID fid = va_arg(ap, jfieldID); 559 std::string name(dvmHumanReadableField((Field*) fid)); 560 StringAppendF(&msg, "%s", name.c_str()); 561 if (!entry) { 562 StringAppendF(&msg, " (%p)", fid); 563 } 564 } else if (ch == 'z') { // non-negative jsize 565 // You might expect jsize to be size_t, but it's not; it's the same as jint. 566 // We only treat this specially so we can do the non-negative check. 567 // TODO: maybe this wasn't worth it? 568 jint i = va_arg(ap, jint); 569 StringAppendF(&msg, "%d", i); 570 } else if (ch == 'm') { // jmethodID 571 jmethodID mid = va_arg(ap, jmethodID); 572 std::string name(dvmHumanReadableMethod((Method*) mid, true)); 573 StringAppendF(&msg, "%s", name.c_str()); 574 if (!entry) { 575 StringAppendF(&msg, " (%p)", mid); 576 } 577 } else if (ch == 'p') { // void* ("pointer") 578 void* p = va_arg(ap, void*); 579 if (p == NULL) { 580 msg += "NULL"; 581 } else { 582 StringAppendF(&msg, "(void*) %p", p); 583 } 584 } else if (ch == 'r') { // jint (release mode) 585 jint releaseMode = va_arg(ap, jint); 586 if (releaseMode == 0) { 587 msg += "0"; 588 } else if (releaseMode == JNI_ABORT) { 589 msg += "JNI_ABORT"; 590 } else if (releaseMode == JNI_COMMIT) { 591 msg += "JNI_COMMIT"; 592 } else { 593 StringAppendF(&msg, "invalid release mode %d", releaseMode); 594 } 595 } else if (ch == 'u') { // const char* (modified UTF-8) 596 const char* utf = va_arg(ap, const char*); 597 if (utf == NULL) { 598 msg += "NULL"; 599 } else { 600 StringAppendF(&msg, "\"%s\"", utf); 601 } 602 } else if (ch == '.') { 603 msg += "..."; 604 } else { 605 LOGE("unknown trace format specifier %c", ch); 606 dvmAbort(); 607 } 608 if (*fmt) { 609 StringAppendF(&msg, ", "); 610 } 611 } 612 va_end(ap); 613 614 if (entry) { 615 if (mHasMethod) { 616 std::string methodName(dvmHumanReadableMethod(method, false)); 617 LOGI("JNI: %s -> %s(%s)", methodName.c_str(), mFunctionName, msg.c_str()); 618 mIndent = methodName.size() + 1; 619 } else { 620 LOGI("JNI: -> %s(%s)", mFunctionName, msg.c_str()); 621 mIndent = 0; 622 } 623 } else { 624 LOGI("JNI: %*s<- %s returned %s", mIndent, "", mFunctionName, msg.c_str()); 625 } 626 } 627 628 // We always do the thorough checks on entry, and never on exit... 629 if (entry) { 630 va_start(ap, fmt0); 631 for (const char* fmt = fmt0; *fmt; ++fmt) { 632 char ch = *fmt; 633 if (ch == 'a') { 634 checkArray(va_arg(ap, jarray)); 635 } else if (ch == 'c') { 636 checkClass(va_arg(ap, jclass)); 637 } else if (ch == 'L') { 638 checkObject(va_arg(ap, jobject)); 639 } else if (ch == 'r') { 640 checkReleaseMode(va_arg(ap, jint)); 641 } else if (ch == 's') { 642 checkString(va_arg(ap, jstring)); 643 } else if (ch == 'u') { 644 if ((mFlags & kFlag_Release) != 0) { 645 checkNonNull(va_arg(ap, const char*)); 646 } else { 647 bool nullable = ((mFlags & kFlag_NullableUtf) != 0); 648 checkUtfString(va_arg(ap, const char*), nullable); 649 } 650 } else if (ch == 'z') { 651 checkLengthPositive(va_arg(ap, jsize)); 652 } else if (strchr("BCISZbfmpEv", ch) != NULL) { 653 va_arg(ap, int); // Skip this argument. 654 } else if (ch == 'D' || ch == 'F') { 655 va_arg(ap, double); // Skip this argument. 656 } else if (ch == 'J') { 657 va_arg(ap, long); // Skip this argument. 658 } else if (ch == '.') { 659 } else { 660 LOGE("unknown check format specifier %c", ch); 661 dvmAbort(); 662 } 663 } 664 va_end(ap); 665 } 666 } 667 668private: 669 JNIEnv* mEnv; 670 const char* mFunctionName; 671 int mFlags; 672 bool mHasMethod; 673 size_t mIndent; 674 675 void init(JNIEnv* env, int flags, const char* functionName, bool hasMethod) { 676 mEnv = env; 677 mFlags = flags; 678 679 // Use +6 to drop the leading "Check_"... 680 mFunctionName = functionName + 6; 681 682 // Set "hasMethod" to true if we have a valid thread with a method pointer. 683 // We won't have one before attaching a thread, after detaching a thread, or 684 // after destroying the VM. 685 mHasMethod = hasMethod; 686 } 687 688 /* 689 * Verify that "array" is non-NULL and points to an Array object. 690 * 691 * Since we're dealing with objects, switch to "running" mode. 692 */ 693 void checkArray(jarray jarr) { 694 if (jarr == NULL) { 695 LOGW("JNI WARNING: received null array"); 696 showLocation(); 697 abortMaybe(); 698 return; 699 } 700 701 ScopedJniThreadState ts(mEnv); 702 bool printWarn = false; 703 704 Object* obj = dvmDecodeIndirectRef(mEnv, jarr); 705 706 if (!dvmIsValidObject(obj)) { 707 LOGW("JNI WARNING: jarray is an invalid %s reference (%p)", 708 indirectRefKindName(jarr), jarr); 709 printWarn = true; 710 } else if (obj->clazz->descriptor[0] != '[') { 711 LOGW("JNI WARNING: jarray arg has wrong type (expected array, got %s)", 712 obj->clazz->descriptor); 713 printWarn = true; 714 } 715 716 if (printWarn) { 717 showLocation(); 718 abortMaybe(); 719 } 720 } 721 722 void checkClass(jclass c) { 723 checkInstance(c, gDvm.classJavaLangClass, "jclass"); 724 } 725 726 void checkLengthPositive(jsize length) { 727 if (length < 0) { 728 LOGW("JNI WARNING: negative jsize (%s)", mFunctionName); 729 abortMaybe(); 730 } 731 } 732 733 /* 734 * Verify that "jobj" is a valid object, and that it's an object that JNI 735 * is allowed to know about. We allow NULL references. 736 * 737 * Switches to "running" mode before performing checks. 738 */ 739 void checkObject(jobject jobj) { 740 if (jobj == NULL) { 741 return; 742 } 743 744 ScopedJniThreadState ts(mEnv); 745 746 bool printWarn = false; 747 if (dvmGetJNIRefType(mEnv, jobj) == JNIInvalidRefType) { 748 LOGW("JNI WARNING: %p is not a valid JNI reference", jobj); 749 printWarn = true; 750 } else { 751 Object* obj = dvmDecodeIndirectRef(mEnv, jobj); 752 if (obj == kInvalidIndirectRefObject) { 753 LOGW("JNI WARNING: native code passing in invalid reference %p", jobj); 754 printWarn = true; 755 } else if (obj != NULL && !dvmIsValidObject(obj)) { 756 // TODO: when we remove workAroundAppJniBugs, this should be impossible. 757 LOGW("JNI WARNING: native code passing in reference to invalid object %p %p", 758 jobj, obj); 759 printWarn = true; 760 } 761 } 762 763 if (printWarn) { 764 showLocation(); 765 abortMaybe(); 766 } 767 } 768 769 /* 770 * Verify that the "mode" argument passed to a primitive array Release 771 * function is one of the valid values. 772 */ 773 void checkReleaseMode(jint mode) { 774 if (mode != 0 && mode != JNI_COMMIT && mode != JNI_ABORT) { 775 LOGW("JNI WARNING: bad value for mode (%d) (%s)", mode, mFunctionName); 776 abortMaybe(); 777 } 778 } 779 780 void checkString(jstring s) { 781 checkInstance(s, gDvm.classJavaLangString, "jstring"); 782 } 783 784 void checkThread(int flags) { 785 // Get the *correct* JNIEnv by going through our TLS pointer. 786 JNIEnvExt* threadEnv = dvmGetJNIEnvForThread(); 787 788 /* 789 * Verify that the current thread is (a) attached and (b) associated with 790 * this particular instance of JNIEnv. 791 */ 792 bool printWarn = false; 793 if (threadEnv == NULL) { 794 LOGE("JNI ERROR: non-VM thread making JNI calls"); 795 // don't set printWarn -- it'll try to call showLocation() 796 dvmAbort(); 797 } else if ((JNIEnvExt*) mEnv != threadEnv) { 798 if (dvmThreadSelf()->threadId != threadEnv->envThreadId) { 799 LOGE("JNI: threadEnv != thread->env?"); 800 dvmAbort(); 801 } 802 803 LOGW("JNI WARNING: threadid=%d using env from threadid=%d", 804 threadEnv->envThreadId, ((JNIEnvExt*) mEnv)->envThreadId); 805 printWarn = true; 806 807 // If we're keeping broken code limping along, we need to suppress the abort... 808 if (!gDvmJni.workAroundAppJniBugs) { 809 printWarn = false; 810 } 811 812 /* this is a bad idea -- need to throw as we exit, or abort func */ 813 //dvmThrowRuntimeException("invalid use of JNI env ptr"); 814 } else if (((JNIEnvExt*) mEnv)->self != dvmThreadSelf()) { 815 /* correct JNIEnv*; make sure the "self" pointer is correct */ 816 LOGE("JNI ERROR: env->self != thread-self (%p vs. %p)", 817 ((JNIEnvExt*) mEnv)->self, dvmThreadSelf()); 818 dvmAbort(); 819 } 820 821 /* 822 * Verify that, if this thread previously made a critical "get" call, we 823 * do the corresponding "release" call before we try anything else. 824 */ 825 switch (flags & kFlag_CritMask) { 826 case kFlag_CritOkay: // okay to call this method 827 break; 828 case kFlag_CritBad: // not okay to call 829 if (threadEnv->critical) { 830 LOGW("JNI WARNING: threadid=%d using JNI after critical get", 831 threadEnv->envThreadId); 832 printWarn = true; 833 } 834 break; 835 case kFlag_CritGet: // this is a "get" call 836 /* don't check here; we allow nested gets */ 837 threadEnv->critical++; 838 break; 839 case kFlag_CritRelease: // this is a "release" call 840 threadEnv->critical--; 841 if (threadEnv->critical < 0) { 842 LOGW("JNI WARNING: threadid=%d called too many crit releases", 843 threadEnv->envThreadId); 844 printWarn = true; 845 } 846 break; 847 default: 848 assert(false); 849 } 850 851 /* 852 * Verify that, if an exception has been raised, the native code doesn't 853 * make any JNI calls other than the Exception* methods. 854 */ 855 bool printException = false; 856 if ((flags & kFlag_ExcepOkay) == 0 && dvmCheckException(dvmThreadSelf())) { 857 LOGW("JNI WARNING: JNI method called with exception pending"); 858 printWarn = true; 859 printException = true; 860 } 861 862 if (printWarn) { 863 showLocation(); 864 } 865 if (printException) { 866 LOGW("Pending exception is:"); 867 dvmLogExceptionStackTrace(); 868 } 869 if (printWarn) { 870 abortMaybe(); 871 } 872 } 873 874 /* 875 * Verify that "bytes" points to valid "modified UTF-8" data. 876 */ 877 void checkUtfString(const char* bytes, bool nullable) { 878 if (bytes == NULL) { 879 if (!nullable) { 880 LOGW("JNI WARNING: non-nullable const char* was NULL"); 881 showLocation(); 882 abortMaybe(); 883 } 884 return; 885 } 886 887 const char* errorKind = NULL; 888 u1 utf8 = checkUtfBytes(bytes, &errorKind); 889 if (errorKind != NULL) { 890 LOGW("JNI WARNING: input is not valid UTF-8: illegal %s byte %#x", errorKind, utf8); 891 LOGW(" string: '%s'", bytes); 892 showLocation(); 893 abortMaybe(); 894 } 895 } 896 897 /* 898 * Verify that "jobj" is a valid non-NULL object reference, and points to 899 * an instance of expectedClass. 900 * 901 * Because we're looking at an object on the GC heap, we have to switch 902 * to "running" mode before doing the checks. 903 */ 904 void checkInstance(jobject jobj, ClassObject* expectedClass, const char* argName) { 905 if (jobj == NULL) { 906 LOGW("JNI WARNING: received null %s", argName); 907 showLocation(); 908 abortMaybe(); 909 return; 910 } 911 912 ScopedJniThreadState ts(mEnv); 913 bool printWarn = false; 914 915 Object* obj = dvmDecodeIndirectRef(mEnv, jobj); 916 917 if (!dvmIsValidObject(obj)) { 918 LOGW("JNI WARNING: %s is an invalid %s reference (%p)", 919 argName, indirectRefKindName(jobj), jobj); 920 printWarn = true; 921 } else if (obj->clazz != expectedClass) { 922 LOGW("JNI WARNING: %s arg has wrong type (expected %s, got %s)", 923 argName, expectedClass->descriptor, obj->clazz->descriptor); 924 printWarn = true; 925 } 926 927 if (printWarn) { 928 showLocation(); 929 abortMaybe(); 930 } 931 } 932 933 static u1 checkUtfBytes(const char* bytes, const char** errorKind) { 934 while (*bytes != '\0') { 935 u1 utf8 = *(bytes++); 936 // Switch on the high four bits. 937 switch (utf8 >> 4) { 938 case 0x00: 939 case 0x01: 940 case 0x02: 941 case 0x03: 942 case 0x04: 943 case 0x05: 944 case 0x06: 945 case 0x07: 946 // Bit pattern 0xxx. No need for any extra bytes. 947 break; 948 case 0x08: 949 case 0x09: 950 case 0x0a: 951 case 0x0b: 952 case 0x0f: 953 /* 954 * Bit pattern 10xx or 1111, which are illegal start bytes. 955 * Note: 1111 is valid for normal UTF-8, but not the 956 * modified UTF-8 used here. 957 */ 958 *errorKind = "start"; 959 return utf8; 960 case 0x0e: 961 // Bit pattern 1110, so there are two additional bytes. 962 utf8 = *(bytes++); 963 if ((utf8 & 0xc0) != 0x80) { 964 *errorKind = "continuation"; 965 return utf8; 966 } 967 // Fall through to take care of the final byte. 968 case 0x0c: 969 case 0x0d: 970 // Bit pattern 110x, so there is one additional byte. 971 utf8 = *(bytes++); 972 if ((utf8 & 0xc0) != 0x80) { 973 *errorKind = "continuation"; 974 return utf8; 975 } 976 break; 977 } 978 } 979 return 0; 980 } 981 982 /** 983 * Returns a human-readable name for the given primitive type. 984 */ 985 static const char* primitiveTypeToName(PrimitiveType primType) { 986 switch (primType) { 987 case PRIM_VOID: return "void"; 988 case PRIM_BOOLEAN: return "boolean"; 989 case PRIM_BYTE: return "byte"; 990 case PRIM_SHORT: return "short"; 991 case PRIM_CHAR: return "char"; 992 case PRIM_INT: return "int"; 993 case PRIM_LONG: return "long"; 994 case PRIM_FLOAT: return "float"; 995 case PRIM_DOUBLE: return "double"; 996 case PRIM_NOT: return "Object/array"; 997 default: return "???"; 998 } 999 } 1000 1001 void showLocation() { 1002 const Method* method = dvmGetCurrentJNIMethod(); 1003 char* desc = dexProtoCopyMethodDescriptor(&method->prototype); 1004 LOGW(" in %s.%s:%s (%s)", method->clazz->descriptor, method->name, desc, mFunctionName); 1005 free(desc); 1006 } 1007 1008 // Disallow copy and assignment. 1009 ScopedCheck(const ScopedCheck&); 1010 void operator=(const ScopedCheck&); 1011}; 1012 1013/* 1014 * =========================================================================== 1015 * Guarded arrays 1016 * =========================================================================== 1017 */ 1018 1019#define kGuardLen 512 /* must be multiple of 2 */ 1020#define kGuardPattern 0xd5e3 /* uncommon values; d5e3d5e3 invalid addr */ 1021#define kGuardMagic 0xffd5aa96 1022 1023/* this gets tucked in at the start of the buffer; struct size must be even */ 1024struct GuardedCopy { 1025 u4 magic; 1026 uLong adler; 1027 size_t originalLen; 1028 const void* originalPtr; 1029 1030 /* find the GuardedCopy given the pointer into the "live" data */ 1031 static inline const GuardedCopy* fromData(const void* dataBuf) { 1032 return reinterpret_cast<const GuardedCopy*>(actualBuffer(dataBuf)); 1033 } 1034 1035 /* 1036 * Create an over-sized buffer to hold the contents of "buf". Copy it in, 1037 * filling in the area around it with guard data. 1038 * 1039 * We use a 16-bit pattern to make a rogue memset less likely to elude us. 1040 */ 1041 static void* create(const void* buf, size_t len, bool modOkay) { 1042 size_t newLen = actualLength(len); 1043 u1* newBuf = debugAlloc(newLen); 1044 1045 /* fill it in with a pattern */ 1046 u2* pat = (u2*) newBuf; 1047 for (size_t i = 0; i < newLen / 2; i++) { 1048 *pat++ = kGuardPattern; 1049 } 1050 1051 /* copy the data in; note "len" could be zero */ 1052 memcpy(newBuf + kGuardLen / 2, buf, len); 1053 1054 /* if modification is not expected, grab a checksum */ 1055 uLong adler = 0; 1056 if (!modOkay) { 1057 adler = adler32(0L, Z_NULL, 0); 1058 adler = adler32(adler, (const Bytef*)buf, len); 1059 *(uLong*)newBuf = adler; 1060 } 1061 1062 GuardedCopy* pExtra = reinterpret_cast<GuardedCopy*>(newBuf); 1063 pExtra->magic = kGuardMagic; 1064 pExtra->adler = adler; 1065 pExtra->originalPtr = buf; 1066 pExtra->originalLen = len; 1067 1068 return newBuf + kGuardLen / 2; 1069 } 1070 1071 /* 1072 * Free up the guard buffer, scrub it, and return the original pointer. 1073 */ 1074 static void* destroy(void* dataBuf) { 1075 const GuardedCopy* pExtra = GuardedCopy::fromData(dataBuf); 1076 void* originalPtr = (void*) pExtra->originalPtr; 1077 size_t len = pExtra->originalLen; 1078 debugFree(dataBuf, len); 1079 return originalPtr; 1080 } 1081 1082 /* 1083 * Verify the guard area and, if "modOkay" is false, that the data itself 1084 * has not been altered. 1085 * 1086 * The caller has already checked that "dataBuf" is non-NULL. 1087 */ 1088 static bool check(const void* dataBuf, bool modOkay) { 1089 static const u4 kMagicCmp = kGuardMagic; 1090 const u1* fullBuf = actualBuffer(dataBuf); 1091 const GuardedCopy* pExtra = GuardedCopy::fromData(dataBuf); 1092 1093 /* 1094 * Before we do anything with "pExtra", check the magic number. We 1095 * do the check with memcmp rather than "==" in case the pointer is 1096 * unaligned. If it points to completely bogus memory we're going 1097 * to crash, but there's no easy way around that. 1098 */ 1099 if (memcmp(&pExtra->magic, &kMagicCmp, 4) != 0) { 1100 u1 buf[4]; 1101 memcpy(buf, &pExtra->magic, 4); 1102 LOGE("JNI: guard magic does not match (found 0x%02x%02x%02x%02x) -- incorrect data pointer %p?", 1103 buf[3], buf[2], buf[1], buf[0], dataBuf); /* assume little endian */ 1104 return false; 1105 } 1106 1107 size_t len = pExtra->originalLen; 1108 1109 /* check bottom half of guard; skip over optional checksum storage */ 1110 const u2* pat = (u2*) fullBuf; 1111 for (size_t i = sizeof(GuardedCopy) / 2; i < (kGuardLen / 2 - sizeof(GuardedCopy)) / 2; i++) { 1112 if (pat[i] != kGuardPattern) { 1113 LOGE("JNI: guard pattern(1) disturbed at %p + %d", fullBuf, i*2); 1114 return false; 1115 } 1116 } 1117 1118 int offset = kGuardLen / 2 + len; 1119 if (offset & 0x01) { 1120 /* odd byte; expected value depends on endian-ness of host */ 1121 const u2 patSample = kGuardPattern; 1122 if (fullBuf[offset] != ((const u1*) &patSample)[1]) { 1123 LOGE("JNI: guard pattern disturbed in odd byte after %p (+%d) 0x%02x 0x%02x", 1124 fullBuf, offset, fullBuf[offset], ((const u1*) &patSample)[1]); 1125 return false; 1126 } 1127 offset++; 1128 } 1129 1130 /* check top half of guard */ 1131 pat = (u2*) (fullBuf + offset); 1132 for (size_t i = 0; i < kGuardLen / 4; i++) { 1133 if (pat[i] != kGuardPattern) { 1134 LOGE("JNI: guard pattern(2) disturbed at %p + %d", fullBuf, offset + i*2); 1135 return false; 1136 } 1137 } 1138 1139 /* 1140 * If modification is not expected, verify checksum. Strictly speaking 1141 * this is wrong: if we told the client that we made a copy, there's no 1142 * reason they can't alter the buffer. 1143 */ 1144 if (!modOkay) { 1145 uLong adler = adler32(0L, Z_NULL, 0); 1146 adler = adler32(adler, (const Bytef*)dataBuf, len); 1147 if (pExtra->adler != adler) { 1148 LOGE("JNI: buffer modified (0x%08lx vs 0x%08lx) at addr %p", 1149 pExtra->adler, adler, dataBuf); 1150 return false; 1151 } 1152 } 1153 1154 return true; 1155 } 1156 1157private: 1158 static u1* debugAlloc(size_t len) { 1159 void* result = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0); 1160 if (result == MAP_FAILED) { 1161 LOGE("GuardedCopy::create mmap(%d) failed: %s", len, strerror(errno)); 1162 dvmAbort(); 1163 } 1164 return reinterpret_cast<u1*>(result); 1165 } 1166 1167 static void debugFree(void* dataBuf, size_t len) { 1168 u1* fullBuf = actualBuffer(dataBuf); 1169 size_t totalByteCount = actualLength(len); 1170 // TODO: we could mprotect instead, and keep the allocation around for a while. 1171 // This would be even more expensive, but it might catch more errors. 1172 // if (mprotect(fullBuf, totalByteCount, PROT_NONE) != 0) { 1173 // LOGW("mprotect(PROT_NONE) failed: %s", strerror(errno)); 1174 // } 1175 if (munmap(fullBuf, totalByteCount) != 0) { 1176 LOGW("munmap failed: %s", strerror(errno)); 1177 dvmAbort(); 1178 } 1179 } 1180 1181 static const u1* actualBuffer(const void* dataBuf) { 1182 return reinterpret_cast<const u1*>(dataBuf) - kGuardLen / 2; 1183 } 1184 1185 static u1* actualBuffer(void* dataBuf) { 1186 return reinterpret_cast<u1*>(dataBuf) - kGuardLen / 2; 1187 } 1188 1189 // Underlying length of a user allocation of 'length' bytes. 1190 static size_t actualLength(size_t length) { 1191 return (length + kGuardLen + 1) & ~0x01; 1192 } 1193}; 1194 1195/* 1196 * Return the width, in bytes, of a primitive type. 1197 */ 1198static int dvmPrimitiveTypeWidth(PrimitiveType primType) { 1199 switch (primType) { 1200 case PRIM_BOOLEAN: return 1; 1201 case PRIM_BYTE: return 1; 1202 case PRIM_SHORT: return 2; 1203 case PRIM_CHAR: return 2; 1204 case PRIM_INT: return 4; 1205 case PRIM_LONG: return 8; 1206 case PRIM_FLOAT: return 4; 1207 case PRIM_DOUBLE: return 8; 1208 case PRIM_VOID: 1209 default: { 1210 assert(false); 1211 return -1; 1212 } 1213 } 1214} 1215 1216/* 1217 * Create a guarded copy of a primitive array. Modifications to the copied 1218 * data are allowed. Returns a pointer to the copied data. 1219 */ 1220static void* createGuardedPACopy(JNIEnv* env, const jarray jarr, jboolean* isCopy) { 1221 ScopedJniThreadState ts(env); 1222 1223 ArrayObject* arrObj = (ArrayObject*) dvmDecodeIndirectRef(env, jarr); 1224 PrimitiveType primType = arrObj->clazz->elementClass->primitiveType; 1225 int len = arrObj->length * dvmPrimitiveTypeWidth(primType); 1226 void* result = GuardedCopy::create(arrObj->contents, len, true); 1227 if (isCopy != NULL) { 1228 *isCopy = JNI_TRUE; 1229 } 1230 return result; 1231} 1232 1233/* 1234 * Perform the array "release" operation, which may or may not copy data 1235 * back into the VM, and may or may not release the underlying storage. 1236 */ 1237static void* releaseGuardedPACopy(JNIEnv* env, jarray jarr, void* dataBuf, int mode) { 1238 ScopedJniThreadState ts(env); 1239 ArrayObject* arrObj = (ArrayObject*) dvmDecodeIndirectRef(env, jarr); 1240 1241 if (!GuardedCopy::check(dataBuf, true)) { 1242 LOGE("JNI: failed guarded copy check in releaseGuardedPACopy"); 1243 abortMaybe(); 1244 return NULL; 1245 } 1246 1247 if (mode != JNI_ABORT) { 1248 size_t len = GuardedCopy::fromData(dataBuf)->originalLen; 1249 memcpy(arrObj->contents, dataBuf, len); 1250 } 1251 1252 u1* result = NULL; 1253 if (mode != JNI_COMMIT) { 1254 result = (u1*) GuardedCopy::destroy(dataBuf); 1255 } else { 1256 result = (u1*) (void*) GuardedCopy::fromData(dataBuf)->originalPtr; 1257 } 1258 1259 /* pointer is to the array contents; back up to the array object */ 1260 result -= OFFSETOF_MEMBER(ArrayObject, contents); 1261 return result; 1262} 1263 1264 1265/* 1266 * =========================================================================== 1267 * JNI functions 1268 * =========================================================================== 1269 */ 1270 1271#define CHECK_JNI_ENTRY(flags, types, args...) \ 1272 ScopedCheck sc(env, flags, __FUNCTION__); \ 1273 sc.check(true, types, ##args) 1274 1275#define CHECK_JNI_EXIT(type, exp) ({ \ 1276 typeof (exp) _rc = (exp); \ 1277 sc.check(false, type, _rc); \ 1278 _rc; }) 1279#define CHECK_JNI_EXIT_VOID() \ 1280 sc.check(false, "V") 1281 1282static jint Check_GetVersion(JNIEnv* env) { 1283 CHECK_JNI_ENTRY(kFlag_Default, "E", env); 1284 return CHECK_JNI_EXIT("I", baseEnv(env)->GetVersion(env)); 1285} 1286 1287static jclass Check_DefineClass(JNIEnv* env, const char* name, jobject loader, 1288 const jbyte* buf, jsize bufLen) 1289{ 1290 CHECK_JNI_ENTRY(kFlag_Default, "EuLpz", env, name, loader, buf, bufLen); 1291 sc.checkClassName(name); 1292 return CHECK_JNI_EXIT("c", baseEnv(env)->DefineClass(env, name, loader, buf, bufLen)); 1293} 1294 1295static jclass Check_FindClass(JNIEnv* env, const char* name) { 1296 CHECK_JNI_ENTRY(kFlag_Default, "Eu", env, name); 1297 sc.checkClassName(name); 1298 return CHECK_JNI_EXIT("c", baseEnv(env)->FindClass(env, name)); 1299} 1300 1301static jclass Check_GetSuperclass(JNIEnv* env, jclass clazz) { 1302 CHECK_JNI_ENTRY(kFlag_Default, "Ec", env, clazz); 1303 return CHECK_JNI_EXIT("c", baseEnv(env)->GetSuperclass(env, clazz)); 1304} 1305 1306static jboolean Check_IsAssignableFrom(JNIEnv* env, jclass clazz1, jclass clazz2) { 1307 CHECK_JNI_ENTRY(kFlag_Default, "Ecc", env, clazz1, clazz2); 1308 return CHECK_JNI_EXIT("b", baseEnv(env)->IsAssignableFrom(env, clazz1, clazz2)); 1309} 1310 1311static jmethodID Check_FromReflectedMethod(JNIEnv* env, jobject method) { 1312 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, method); 1313 // TODO: check that 'field' is a java.lang.reflect.Method. 1314 return CHECK_JNI_EXIT("m", baseEnv(env)->FromReflectedMethod(env, method)); 1315} 1316 1317static jfieldID Check_FromReflectedField(JNIEnv* env, jobject field) { 1318 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, field); 1319 // TODO: check that 'field' is a java.lang.reflect.Field. 1320 return CHECK_JNI_EXIT("f", baseEnv(env)->FromReflectedField(env, field)); 1321} 1322 1323static jobject Check_ToReflectedMethod(JNIEnv* env, jclass cls, 1324 jmethodID methodID, jboolean isStatic) 1325{ 1326 CHECK_JNI_ENTRY(kFlag_Default, "Ecmb", env, cls, methodID, isStatic); 1327 return CHECK_JNI_EXIT("L", baseEnv(env)->ToReflectedMethod(env, cls, methodID, isStatic)); 1328} 1329 1330static jobject Check_ToReflectedField(JNIEnv* env, jclass cls, 1331 jfieldID fieldID, jboolean isStatic) 1332{ 1333 CHECK_JNI_ENTRY(kFlag_Default, "Ecfb", env, cls, fieldID, isStatic); 1334 return CHECK_JNI_EXIT("L", baseEnv(env)->ToReflectedField(env, cls, fieldID, isStatic)); 1335} 1336 1337static jint Check_Throw(JNIEnv* env, jthrowable obj) { 1338 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj); 1339 // TODO: check that 'obj' is a java.lang.Throwable. 1340 return CHECK_JNI_EXIT("I", baseEnv(env)->Throw(env, obj)); 1341} 1342 1343static jint Check_ThrowNew(JNIEnv* env, jclass clazz, const char* message) { 1344 CHECK_JNI_ENTRY(kFlag_NullableUtf, "Ecu", env, clazz, message); 1345 return CHECK_JNI_EXIT("I", baseEnv(env)->ThrowNew(env, clazz, message)); 1346} 1347 1348static jthrowable Check_ExceptionOccurred(JNIEnv* env) { 1349 CHECK_JNI_ENTRY(kFlag_ExcepOkay, "E", env); 1350 return CHECK_JNI_EXIT("L", baseEnv(env)->ExceptionOccurred(env)); 1351} 1352 1353static void Check_ExceptionDescribe(JNIEnv* env) { 1354 CHECK_JNI_ENTRY(kFlag_ExcepOkay, "E", env); 1355 baseEnv(env)->ExceptionDescribe(env); 1356 CHECK_JNI_EXIT_VOID(); 1357} 1358 1359static void Check_ExceptionClear(JNIEnv* env) { 1360 CHECK_JNI_ENTRY(kFlag_ExcepOkay, "E", env); 1361 baseEnv(env)->ExceptionClear(env); 1362 CHECK_JNI_EXIT_VOID(); 1363} 1364 1365static void Check_FatalError(JNIEnv* env, const char* msg) { 1366 CHECK_JNI_ENTRY(kFlag_NullableUtf, "Eu", env, msg); 1367 baseEnv(env)->FatalError(env, msg); 1368 CHECK_JNI_EXIT_VOID(); 1369} 1370 1371static jint Check_PushLocalFrame(JNIEnv* env, jint capacity) { 1372 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EI", env, capacity); 1373 return CHECK_JNI_EXIT("I", baseEnv(env)->PushLocalFrame(env, capacity)); 1374} 1375 1376static jobject Check_PopLocalFrame(JNIEnv* env, jobject res) { 1377 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, res); 1378 return CHECK_JNI_EXIT("L", baseEnv(env)->PopLocalFrame(env, res)); 1379} 1380 1381static jobject Check_NewGlobalRef(JNIEnv* env, jobject obj) { 1382 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj); 1383 return CHECK_JNI_EXIT("L", baseEnv(env)->NewGlobalRef(env, obj)); 1384} 1385 1386static void Check_DeleteGlobalRef(JNIEnv* env, jobject globalRef) { 1387 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, globalRef); 1388 if (globalRef != NULL && dvmGetJNIRefType(env, globalRef) != JNIGlobalRefType) { 1389 LOGW("JNI WARNING: DeleteGlobalRef on non-global %p (type=%d)", 1390 globalRef, dvmGetJNIRefType(env, globalRef)); 1391 abortMaybe(); 1392 } else { 1393 baseEnv(env)->DeleteGlobalRef(env, globalRef); 1394 CHECK_JNI_EXIT_VOID(); 1395 } 1396} 1397 1398static jobject Check_NewLocalRef(JNIEnv* env, jobject ref) { 1399 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, ref); 1400 return CHECK_JNI_EXIT("L", baseEnv(env)->NewLocalRef(env, ref)); 1401} 1402 1403static void Check_DeleteLocalRef(JNIEnv* env, jobject localRef) { 1404 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, localRef); 1405 if (localRef != NULL && dvmGetJNIRefType(env, localRef) != JNILocalRefType) { 1406 LOGW("JNI WARNING: DeleteLocalRef on non-local %p (type=%d)", 1407 localRef, dvmGetJNIRefType(env, localRef)); 1408 abortMaybe(); 1409 } else { 1410 baseEnv(env)->DeleteLocalRef(env, localRef); 1411 CHECK_JNI_EXIT_VOID(); 1412 } 1413} 1414 1415static jint Check_EnsureLocalCapacity(JNIEnv *env, jint capacity) { 1416 CHECK_JNI_ENTRY(kFlag_Default, "EI", env, capacity); 1417 return CHECK_JNI_EXIT("I", baseEnv(env)->EnsureLocalCapacity(env, capacity)); 1418} 1419 1420static jboolean Check_IsSameObject(JNIEnv* env, jobject ref1, jobject ref2) { 1421 CHECK_JNI_ENTRY(kFlag_Default, "ELL", env, ref1, ref2); 1422 return CHECK_JNI_EXIT("b", baseEnv(env)->IsSameObject(env, ref1, ref2)); 1423} 1424 1425static jobject Check_AllocObject(JNIEnv* env, jclass clazz) { 1426 CHECK_JNI_ENTRY(kFlag_Default, "Ec", env, clazz); 1427 return CHECK_JNI_EXIT("L", baseEnv(env)->AllocObject(env, clazz)); 1428} 1429 1430static jobject Check_NewObject(JNIEnv* env, jclass clazz, jmethodID methodID, ...) { 1431 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID); 1432 va_list args; 1433 va_start(args, methodID); 1434 jobject result = baseEnv(env)->NewObjectV(env, clazz, methodID, args); 1435 va_end(args); 1436 return CHECK_JNI_EXIT("L", result); 1437} 1438 1439static jobject Check_NewObjectV(JNIEnv* env, jclass clazz, jmethodID methodID, va_list args) { 1440 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID); 1441 return CHECK_JNI_EXIT("L", baseEnv(env)->NewObjectV(env, clazz, methodID, args)); 1442} 1443 1444static jobject Check_NewObjectA(JNIEnv* env, jclass clazz, jmethodID methodID, jvalue* args) { 1445 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID); 1446 return CHECK_JNI_EXIT("L", baseEnv(env)->NewObjectA(env, clazz, methodID, args)); 1447} 1448 1449static jclass Check_GetObjectClass(JNIEnv* env, jobject obj) { 1450 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj); 1451 return CHECK_JNI_EXIT("c", baseEnv(env)->GetObjectClass(env, obj)); 1452} 1453 1454static jboolean Check_IsInstanceOf(JNIEnv* env, jobject obj, jclass clazz) { 1455 CHECK_JNI_ENTRY(kFlag_Default, "ELc", env, obj, clazz); 1456 return CHECK_JNI_EXIT("b", baseEnv(env)->IsInstanceOf(env, obj, clazz)); 1457} 1458 1459static jmethodID Check_GetMethodID(JNIEnv* env, jclass clazz, const char* name, const char* sig) { 1460 CHECK_JNI_ENTRY(kFlag_Default, "Ecuu", env, clazz, name, sig); 1461 return CHECK_JNI_EXIT("m", baseEnv(env)->GetMethodID(env, clazz, name, sig)); 1462} 1463 1464static jfieldID Check_GetFieldID(JNIEnv* env, jclass clazz, const char* name, const char* sig) { 1465 CHECK_JNI_ENTRY(kFlag_Default, "Ecuu", env, clazz, name, sig); 1466 return CHECK_JNI_EXIT("f", baseEnv(env)->GetFieldID(env, clazz, name, sig)); 1467} 1468 1469static jmethodID Check_GetStaticMethodID(JNIEnv* env, jclass clazz, 1470 const char* name, const char* sig) 1471{ 1472 CHECK_JNI_ENTRY(kFlag_Default, "Ecuu", env, clazz, name, sig); 1473 return CHECK_JNI_EXIT("m", baseEnv(env)->GetStaticMethodID(env, clazz, name, sig)); 1474} 1475 1476static jfieldID Check_GetStaticFieldID(JNIEnv* env, jclass clazz, 1477 const char* name, const char* sig) 1478{ 1479 CHECK_JNI_ENTRY(kFlag_Default, "Ecuu", env, clazz, name, sig); 1480 return CHECK_JNI_EXIT("f", baseEnv(env)->GetStaticFieldID(env, clazz, name, sig)); 1481} 1482 1483#define FIELD_ACCESSORS(_ctype, _jname, _ftype, _type) \ 1484 static _ctype Check_GetStatic##_jname##Field(JNIEnv* env, jclass clazz, jfieldID fieldID) { \ 1485 CHECK_JNI_ENTRY(kFlag_Default, "Ecf", env, clazz, fieldID); \ 1486 sc.checkStaticFieldID(clazz, fieldID); \ 1487 return CHECK_JNI_EXIT(_type, baseEnv(env)->GetStatic##_jname##Field(env, clazz, fieldID)); \ 1488 } \ 1489 static _ctype Check_Get##_jname##Field(JNIEnv* env, jobject obj, jfieldID fieldID) { \ 1490 CHECK_JNI_ENTRY(kFlag_Default, "ELf", env, obj, fieldID); \ 1491 sc.checkInstanceFieldID(obj, fieldID); \ 1492 return CHECK_JNI_EXIT(_type, baseEnv(env)->Get##_jname##Field(env, obj, fieldID)); \ 1493 } \ 1494 static void Check_SetStatic##_jname##Field(JNIEnv* env, jclass clazz, jfieldID fieldID, _ctype value) { \ 1495 CHECK_JNI_ENTRY(kFlag_Default, "Ecf" _type, env, clazz, fieldID, value); \ 1496 sc.checkStaticFieldID(clazz, fieldID); \ 1497 /* "value" arg only used when type == ref */ \ 1498 sc.checkFieldType((jobject)(u4)value, fieldID, _ftype, true); \ 1499 baseEnv(env)->SetStatic##_jname##Field(env, clazz, fieldID, value); \ 1500 CHECK_JNI_EXIT_VOID(); \ 1501 } \ 1502 static void Check_Set##_jname##Field(JNIEnv* env, jobject obj, jfieldID fieldID, _ctype value) { \ 1503 CHECK_JNI_ENTRY(kFlag_Default, "ELf" _type, env, obj, fieldID, value); \ 1504 sc.checkInstanceFieldID(obj, fieldID); \ 1505 /* "value" arg only used when type == ref */ \ 1506 sc.checkFieldType((jobject)(u4) value, fieldID, _ftype, false); \ 1507 baseEnv(env)->Set##_jname##Field(env, obj, fieldID, value); \ 1508 CHECK_JNI_EXIT_VOID(); \ 1509 } 1510 1511FIELD_ACCESSORS(jobject, Object, PRIM_NOT, "L"); 1512FIELD_ACCESSORS(jboolean, Boolean, PRIM_BOOLEAN, "Z"); 1513FIELD_ACCESSORS(jbyte, Byte, PRIM_BYTE, "B"); 1514FIELD_ACCESSORS(jchar, Char, PRIM_CHAR, "C"); 1515FIELD_ACCESSORS(jshort, Short, PRIM_SHORT, "S"); 1516FIELD_ACCESSORS(jint, Int, PRIM_INT, "I"); 1517FIELD_ACCESSORS(jlong, Long, PRIM_LONG, "J"); 1518FIELD_ACCESSORS(jfloat, Float, PRIM_FLOAT, "F"); 1519FIELD_ACCESSORS(jdouble, Double, PRIM_DOUBLE, "D"); 1520 1521#define CALL(_ctype, _jname, _retdecl, _retasgn, _retok, _retsig) \ 1522 /* Virtual... */ \ 1523 static _ctype Check_Call##_jname##Method(JNIEnv* env, jobject obj, \ 1524 jmethodID methodID, ...) \ 1525 { \ 1526 CHECK_JNI_ENTRY(kFlag_Default, "ELm.", env, obj, methodID); /* TODO: args! */ \ 1527 sc.checkSig(methodID, _retsig, false); \ 1528 sc.checkVirtualMethod(obj, methodID); \ 1529 _retdecl; \ 1530 va_list args; \ 1531 va_start(args, methodID); \ 1532 _retasgn baseEnv(env)->Call##_jname##MethodV(env, obj, methodID, args); \ 1533 va_end(args); \ 1534 _retok; \ 1535 } \ 1536 static _ctype Check_Call##_jname##MethodV(JNIEnv* env, jobject obj, \ 1537 jmethodID methodID, va_list args) \ 1538 { \ 1539 CHECK_JNI_ENTRY(kFlag_Default, "ELm.", env, obj, methodID); /* TODO: args! */ \ 1540 sc.checkSig(methodID, _retsig, false); \ 1541 sc.checkVirtualMethod(obj, methodID); \ 1542 _retdecl; \ 1543 _retasgn baseEnv(env)->Call##_jname##MethodV(env, obj, methodID, args); \ 1544 _retok; \ 1545 } \ 1546 static _ctype Check_Call##_jname##MethodA(JNIEnv* env, jobject obj, \ 1547 jmethodID methodID, jvalue* args) \ 1548 { \ 1549 CHECK_JNI_ENTRY(kFlag_Default, "ELm.", env, obj, methodID); /* TODO: args! */ \ 1550 sc.checkSig(methodID, _retsig, false); \ 1551 sc.checkVirtualMethod(obj, methodID); \ 1552 _retdecl; \ 1553 _retasgn baseEnv(env)->Call##_jname##MethodA(env, obj, methodID, args); \ 1554 _retok; \ 1555 } \ 1556 /* Non-virtual... */ \ 1557 static _ctype Check_CallNonvirtual##_jname##Method(JNIEnv* env, \ 1558 jobject obj, jclass clazz, jmethodID methodID, ...) \ 1559 { \ 1560 CHECK_JNI_ENTRY(kFlag_Default, "ELcm.", env, obj, clazz, methodID); /* TODO: args! */ \ 1561 sc.checkSig(methodID, _retsig, false); \ 1562 sc.checkVirtualMethod(obj, methodID); \ 1563 _retdecl; \ 1564 va_list args; \ 1565 va_start(args, methodID); \ 1566 _retasgn baseEnv(env)->CallNonvirtual##_jname##MethodV(env, obj, clazz, methodID, args); \ 1567 va_end(args); \ 1568 _retok; \ 1569 } \ 1570 static _ctype Check_CallNonvirtual##_jname##MethodV(JNIEnv* env, \ 1571 jobject obj, jclass clazz, jmethodID methodID, va_list args) \ 1572 { \ 1573 CHECK_JNI_ENTRY(kFlag_Default, "ELcm.", env, obj, clazz, methodID); /* TODO: args! */ \ 1574 sc.checkSig(methodID, _retsig, false); \ 1575 sc.checkVirtualMethod(obj, methodID); \ 1576 _retdecl; \ 1577 _retasgn baseEnv(env)->CallNonvirtual##_jname##MethodV(env, obj, clazz, methodID, args); \ 1578 _retok; \ 1579 } \ 1580 static _ctype Check_CallNonvirtual##_jname##MethodA(JNIEnv* env, \ 1581 jobject obj, jclass clazz, jmethodID methodID, jvalue* args) \ 1582 { \ 1583 CHECK_JNI_ENTRY(kFlag_Default, "ELcm.", env, obj, clazz, methodID); /* TODO: args! */ \ 1584 sc.checkSig(methodID, _retsig, false); \ 1585 sc.checkVirtualMethod(obj, methodID); \ 1586 _retdecl; \ 1587 _retasgn baseEnv(env)->CallNonvirtual##_jname##MethodA(env, obj, clazz, methodID, args); \ 1588 _retok; \ 1589 } \ 1590 /* Static... */ \ 1591 static _ctype Check_CallStatic##_jname##Method(JNIEnv* env, \ 1592 jclass clazz, jmethodID methodID, ...) \ 1593 { \ 1594 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID); /* TODO: args! */ \ 1595 sc.checkSig(methodID, _retsig, true); \ 1596 sc.checkStaticMethod(clazz, methodID); \ 1597 _retdecl; \ 1598 va_list args; \ 1599 va_start(args, methodID); \ 1600 _retasgn baseEnv(env)->CallStatic##_jname##MethodV(env, clazz, methodID, args); \ 1601 va_end(args); \ 1602 _retok; \ 1603 } \ 1604 static _ctype Check_CallStatic##_jname##MethodV(JNIEnv* env, \ 1605 jclass clazz, jmethodID methodID, va_list args) \ 1606 { \ 1607 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID); /* TODO: args! */ \ 1608 sc.checkSig(methodID, _retsig, true); \ 1609 sc.checkStaticMethod(clazz, methodID); \ 1610 _retdecl; \ 1611 _retasgn baseEnv(env)->CallStatic##_jname##MethodV(env, clazz, methodID, args); \ 1612 _retok; \ 1613 } \ 1614 static _ctype Check_CallStatic##_jname##MethodA(JNIEnv* env, \ 1615 jclass clazz, jmethodID methodID, jvalue* args) \ 1616 { \ 1617 CHECK_JNI_ENTRY(kFlag_Default, "Ecm.", env, clazz, methodID); /* TODO: args! */ \ 1618 sc.checkSig(methodID, _retsig, true); \ 1619 sc.checkStaticMethod(clazz, methodID); \ 1620 _retdecl; \ 1621 _retasgn baseEnv(env)->CallStatic##_jname##MethodA(env, clazz, methodID, args); \ 1622 _retok; \ 1623 } 1624 1625#define NON_VOID_RETURN(_retsig, _ctype) return CHECK_JNI_EXIT(_retsig, (_ctype) result) 1626#define VOID_RETURN CHECK_JNI_EXIT_VOID() 1627 1628CALL(jobject, Object, Object* result, result=(Object*), NON_VOID_RETURN("L", jobject), "L"); 1629CALL(jboolean, Boolean, jboolean result, result=, NON_VOID_RETURN("Z", jboolean), "Z"); 1630CALL(jbyte, Byte, jbyte result, result=, NON_VOID_RETURN("B", jbyte), "B"); 1631CALL(jchar, Char, jchar result, result=, NON_VOID_RETURN("C", jchar), "C"); 1632CALL(jshort, Short, jshort result, result=, NON_VOID_RETURN("S", jshort), "S"); 1633CALL(jint, Int, jint result, result=, NON_VOID_RETURN("I", jint), "I"); 1634CALL(jlong, Long, jlong result, result=, NON_VOID_RETURN("J", jlong), "J"); 1635CALL(jfloat, Float, jfloat result, result=, NON_VOID_RETURN("F", jfloat), "F"); 1636CALL(jdouble, Double, jdouble result, result=, NON_VOID_RETURN("D", jdouble), "D"); 1637CALL(void, Void, , , VOID_RETURN, "V"); 1638 1639static jstring Check_NewString(JNIEnv* env, const jchar* unicodeChars, jsize len) { 1640 CHECK_JNI_ENTRY(kFlag_Default, "Epz", env, unicodeChars, len); 1641 return CHECK_JNI_EXIT("s", baseEnv(env)->NewString(env, unicodeChars, len)); 1642} 1643 1644static jsize Check_GetStringLength(JNIEnv* env, jstring string) { 1645 CHECK_JNI_ENTRY(kFlag_CritOkay, "Es", env, string); 1646 return CHECK_JNI_EXIT("I", baseEnv(env)->GetStringLength(env, string)); 1647} 1648 1649static const jchar* Check_GetStringChars(JNIEnv* env, jstring string, jboolean* isCopy) { 1650 CHECK_JNI_ENTRY(kFlag_CritOkay, "Esp", env, string, isCopy); 1651 const jchar* result = baseEnv(env)->GetStringChars(env, string, isCopy); 1652 if (gDvmJni.forceCopy && result != NULL) { 1653 ScopedJniThreadState ts(env); 1654 StringObject* strObj = (StringObject*) dvmDecodeIndirectRef(env, string); 1655 int byteCount = strObj->length() * 2; 1656 result = (const jchar*) GuardedCopy::create(result, byteCount, false); 1657 if (isCopy != NULL) { 1658 *isCopy = JNI_TRUE; 1659 } 1660 } 1661 return CHECK_JNI_EXIT("p", result); 1662} 1663 1664static void Check_ReleaseStringChars(JNIEnv* env, jstring string, const jchar* chars) { 1665 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "Esp", env, string, chars); 1666 sc.checkNonNull(chars); 1667 if (gDvmJni.forceCopy) { 1668 if (!GuardedCopy::check(chars, false)) { 1669 LOGE("JNI: failed guarded copy check in ReleaseStringChars"); 1670 abortMaybe(); 1671 return; 1672 } 1673 chars = (const jchar*) GuardedCopy::destroy((jchar*)chars); 1674 } 1675 baseEnv(env)->ReleaseStringChars(env, string, chars); 1676 CHECK_JNI_EXIT_VOID(); 1677} 1678 1679static jstring Check_NewStringUTF(JNIEnv* env, const char* bytes) { 1680 CHECK_JNI_ENTRY(kFlag_NullableUtf, "Eu", env, bytes); // TODO: show pointer and truncate string. 1681 return CHECK_JNI_EXIT("s", baseEnv(env)->NewStringUTF(env, bytes)); 1682} 1683 1684static jsize Check_GetStringUTFLength(JNIEnv* env, jstring string) { 1685 CHECK_JNI_ENTRY(kFlag_CritOkay, "Es", env, string); 1686 return CHECK_JNI_EXIT("I", baseEnv(env)->GetStringUTFLength(env, string)); 1687} 1688 1689static const char* Check_GetStringUTFChars(JNIEnv* env, jstring string, jboolean* isCopy) { 1690 CHECK_JNI_ENTRY(kFlag_CritOkay, "Esp", env, string, isCopy); 1691 const char* result = baseEnv(env)->GetStringUTFChars(env, string, isCopy); 1692 if (gDvmJni.forceCopy && result != NULL) { 1693 result = (const char*) GuardedCopy::create(result, strlen(result) + 1, false); 1694 if (isCopy != NULL) { 1695 *isCopy = JNI_TRUE; 1696 } 1697 } 1698 return CHECK_JNI_EXIT("u", result); // TODO: show pointer and truncate string. 1699} 1700 1701static void Check_ReleaseStringUTFChars(JNIEnv* env, jstring string, const char* utf) { 1702 CHECK_JNI_ENTRY(kFlag_ExcepOkay | kFlag_Release, "Esu", env, string, utf); // TODO: show pointer and truncate string. 1703 if (gDvmJni.forceCopy) { 1704 if (!GuardedCopy::check(utf, false)) { 1705 LOGE("JNI: failed guarded copy check in ReleaseStringUTFChars"); 1706 abortMaybe(); 1707 return; 1708 } 1709 utf = (const char*) GuardedCopy::destroy((char*)utf); 1710 } 1711 baseEnv(env)->ReleaseStringUTFChars(env, string, utf); 1712 CHECK_JNI_EXIT_VOID(); 1713} 1714 1715static jsize Check_GetArrayLength(JNIEnv* env, jarray array) { 1716 CHECK_JNI_ENTRY(kFlag_CritOkay, "Ea", env, array); 1717 return CHECK_JNI_EXIT("I", baseEnv(env)->GetArrayLength(env, array)); 1718} 1719 1720static jobjectArray Check_NewObjectArray(JNIEnv* env, jsize length, 1721 jclass elementClass, jobject initialElement) 1722{ 1723 CHECK_JNI_ENTRY(kFlag_Default, "EzcL", env, length, elementClass, initialElement); 1724 return CHECK_JNI_EXIT("a", baseEnv(env)->NewObjectArray(env, length, elementClass, initialElement)); 1725} 1726 1727static jobject Check_GetObjectArrayElement(JNIEnv* env, jobjectArray array, jsize index) { 1728 CHECK_JNI_ENTRY(kFlag_Default, "EaI", env, array, index); 1729 return CHECK_JNI_EXIT("L", baseEnv(env)->GetObjectArrayElement(env, array, index)); 1730} 1731 1732static void Check_SetObjectArrayElement(JNIEnv* env, jobjectArray array, jsize index, jobject value) 1733{ 1734 CHECK_JNI_ENTRY(kFlag_Default, "EaIL", env, array, index, value); 1735 baseEnv(env)->SetObjectArrayElement(env, array, index, value); 1736 CHECK_JNI_EXIT_VOID(); 1737} 1738 1739#define NEW_PRIMITIVE_ARRAY(_artype, _jname) \ 1740 static _artype Check_New##_jname##Array(JNIEnv* env, jsize length) { \ 1741 CHECK_JNI_ENTRY(kFlag_Default, "Ez", env, length); \ 1742 return CHECK_JNI_EXIT("a", baseEnv(env)->New##_jname##Array(env, length)); \ 1743 } 1744NEW_PRIMITIVE_ARRAY(jbooleanArray, Boolean); 1745NEW_PRIMITIVE_ARRAY(jbyteArray, Byte); 1746NEW_PRIMITIVE_ARRAY(jcharArray, Char); 1747NEW_PRIMITIVE_ARRAY(jshortArray, Short); 1748NEW_PRIMITIVE_ARRAY(jintArray, Int); 1749NEW_PRIMITIVE_ARRAY(jlongArray, Long); 1750NEW_PRIMITIVE_ARRAY(jfloatArray, Float); 1751NEW_PRIMITIVE_ARRAY(jdoubleArray, Double); 1752 1753 1754/* 1755 * Hack to allow forcecopy to work with jniGetNonMovableArrayElements. 1756 * The code deliberately uses an invalid sequence of operations, so we 1757 * need to pass it through unmodified. Review that code before making 1758 * any changes here. 1759 */ 1760#define kNoCopyMagic 0xd5aab57f 1761 1762#define GET_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname) \ 1763 static _ctype* Check_Get##_jname##ArrayElements(JNIEnv* env, \ 1764 _ctype##Array array, jboolean* isCopy) \ 1765 { \ 1766 CHECK_JNI_ENTRY(kFlag_Default, "Eap", env, array, isCopy); \ 1767 u4 noCopy = 0; \ 1768 if (gDvmJni.forceCopy && isCopy != NULL) { \ 1769 /* capture this before the base call tramples on it */ \ 1770 noCopy = *(u4*) isCopy; \ 1771 } \ 1772 _ctype* result = baseEnv(env)->Get##_jname##ArrayElements(env, array, isCopy); \ 1773 if (gDvmJni.forceCopy && result != NULL) { \ 1774 if (noCopy == kNoCopyMagic) { \ 1775 LOGV("FC: not copying %p %x", array, noCopy); \ 1776 } else { \ 1777 result = (_ctype*) createGuardedPACopy(env, array, isCopy); \ 1778 } \ 1779 } \ 1780 return CHECK_JNI_EXIT("p", result); \ 1781 } 1782 1783#define RELEASE_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname) \ 1784 static void Check_Release##_jname##ArrayElements(JNIEnv* env, \ 1785 _ctype##Array array, _ctype* elems, jint mode) \ 1786 { \ 1787 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "Eapr", env, array, elems, mode); \ 1788 sc.checkNonNull(elems); \ 1789 if (gDvmJni.forceCopy) { \ 1790 if ((uintptr_t)elems == kNoCopyMagic) { \ 1791 LOGV("FC: not freeing %p", array); \ 1792 elems = NULL; /* base JNI call doesn't currently need */ \ 1793 } else { \ 1794 elems = (_ctype*) releaseGuardedPACopy(env, array, elems, mode); \ 1795 } \ 1796 } \ 1797 baseEnv(env)->Release##_jname##ArrayElements(env, array, elems, mode); \ 1798 CHECK_JNI_EXIT_VOID(); \ 1799 } 1800 1801#define GET_PRIMITIVE_ARRAY_REGION(_ctype, _jname) \ 1802 static void Check_Get##_jname##ArrayRegion(JNIEnv* env, \ 1803 _ctype##Array array, jsize start, jsize len, _ctype* buf) { \ 1804 CHECK_JNI_ENTRY(kFlag_Default, "EaIIp", env, array, start, len, buf); \ 1805 baseEnv(env)->Get##_jname##ArrayRegion(env, array, start, len, buf); \ 1806 CHECK_JNI_EXIT_VOID(); \ 1807 } 1808 1809#define SET_PRIMITIVE_ARRAY_REGION(_ctype, _jname) \ 1810 static void Check_Set##_jname##ArrayRegion(JNIEnv* env, \ 1811 _ctype##Array array, jsize start, jsize len, const _ctype* buf) { \ 1812 CHECK_JNI_ENTRY(kFlag_Default, "EaIIp", env, array, start, len, buf); \ 1813 baseEnv(env)->Set##_jname##ArrayRegion(env, array, start, len, buf); \ 1814 CHECK_JNI_EXIT_VOID(); \ 1815 } 1816 1817#define PRIMITIVE_ARRAY_FUNCTIONS(_ctype, _jname, _typechar) \ 1818 GET_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname); \ 1819 RELEASE_PRIMITIVE_ARRAY_ELEMENTS(_ctype, _jname); \ 1820 GET_PRIMITIVE_ARRAY_REGION(_ctype, _jname); \ 1821 SET_PRIMITIVE_ARRAY_REGION(_ctype, _jname); 1822 1823/* TODO: verify primitive array type matches call type */ 1824PRIMITIVE_ARRAY_FUNCTIONS(jboolean, Boolean, 'Z'); 1825PRIMITIVE_ARRAY_FUNCTIONS(jbyte, Byte, 'B'); 1826PRIMITIVE_ARRAY_FUNCTIONS(jchar, Char, 'C'); 1827PRIMITIVE_ARRAY_FUNCTIONS(jshort, Short, 'S'); 1828PRIMITIVE_ARRAY_FUNCTIONS(jint, Int, 'I'); 1829PRIMITIVE_ARRAY_FUNCTIONS(jlong, Long, 'J'); 1830PRIMITIVE_ARRAY_FUNCTIONS(jfloat, Float, 'F'); 1831PRIMITIVE_ARRAY_FUNCTIONS(jdouble, Double, 'D'); 1832 1833static jint Check_RegisterNatives(JNIEnv* env, jclass clazz, const JNINativeMethod* methods, 1834 jint nMethods) 1835{ 1836 CHECK_JNI_ENTRY(kFlag_Default, "EcpI", env, clazz, methods, nMethods); 1837 return CHECK_JNI_EXIT("I", baseEnv(env)->RegisterNatives(env, clazz, methods, nMethods)); 1838} 1839 1840static jint Check_UnregisterNatives(JNIEnv* env, jclass clazz) { 1841 CHECK_JNI_ENTRY(kFlag_Default, "Ec", env, clazz); 1842 return CHECK_JNI_EXIT("I", baseEnv(env)->UnregisterNatives(env, clazz)); 1843} 1844 1845static jint Check_MonitorEnter(JNIEnv* env, jobject obj) { 1846 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj); 1847 return CHECK_JNI_EXIT("I", baseEnv(env)->MonitorEnter(env, obj)); 1848} 1849 1850static jint Check_MonitorExit(JNIEnv* env, jobject obj) { 1851 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, obj); 1852 return CHECK_JNI_EXIT("I", baseEnv(env)->MonitorExit(env, obj)); 1853} 1854 1855static jint Check_GetJavaVM(JNIEnv *env, JavaVM **vm) { 1856 CHECK_JNI_ENTRY(kFlag_Default, "Ep", env, vm); 1857 return CHECK_JNI_EXIT("I", baseEnv(env)->GetJavaVM(env, vm)); 1858} 1859 1860static void Check_GetStringRegion(JNIEnv* env, jstring str, jsize start, jsize len, jchar* buf) { 1861 CHECK_JNI_ENTRY(kFlag_CritOkay, "EsIIp", env, str, start, len, buf); 1862 baseEnv(env)->GetStringRegion(env, str, start, len, buf); 1863 CHECK_JNI_EXIT_VOID(); 1864} 1865 1866static void Check_GetStringUTFRegion(JNIEnv* env, jstring str, jsize start, jsize len, char* buf) { 1867 CHECK_JNI_ENTRY(kFlag_CritOkay, "EsIIp", env, str, start, len, buf); 1868 baseEnv(env)->GetStringUTFRegion(env, str, start, len, buf); 1869 CHECK_JNI_EXIT_VOID(); 1870} 1871 1872static void* Check_GetPrimitiveArrayCritical(JNIEnv* env, jarray array, jboolean* isCopy) { 1873 CHECK_JNI_ENTRY(kFlag_CritGet, "Eap", env, array, isCopy); 1874 void* result = baseEnv(env)->GetPrimitiveArrayCritical(env, array, isCopy); 1875 if (gDvmJni.forceCopy && result != NULL) { 1876 result = createGuardedPACopy(env, array, isCopy); 1877 } 1878 return CHECK_JNI_EXIT("p", result); 1879} 1880 1881static void Check_ReleasePrimitiveArrayCritical(JNIEnv* env, jarray array, void* carray, jint mode) 1882{ 1883 CHECK_JNI_ENTRY(kFlag_CritRelease | kFlag_ExcepOkay, "Eapr", env, array, carray, mode); 1884 sc.checkNonNull(carray); 1885 if (gDvmJni.forceCopy) { 1886 carray = releaseGuardedPACopy(env, array, carray, mode); 1887 } 1888 baseEnv(env)->ReleasePrimitiveArrayCritical(env, array, carray, mode); 1889 CHECK_JNI_EXIT_VOID(); 1890} 1891 1892static const jchar* Check_GetStringCritical(JNIEnv* env, jstring string, jboolean* isCopy) { 1893 CHECK_JNI_ENTRY(kFlag_CritGet, "Esp", env, string, isCopy); 1894 const jchar* result = baseEnv(env)->GetStringCritical(env, string, isCopy); 1895 if (gDvmJni.forceCopy && result != NULL) { 1896 ScopedJniThreadState ts(env); 1897 StringObject* strObj = (StringObject*) dvmDecodeIndirectRef(env, string); 1898 int byteCount = strObj->length() * 2; 1899 result = (const jchar*) GuardedCopy::create(result, byteCount, false); 1900 if (isCopy != NULL) { 1901 *isCopy = JNI_TRUE; 1902 } 1903 } 1904 return CHECK_JNI_EXIT("p", result); 1905} 1906 1907static void Check_ReleaseStringCritical(JNIEnv* env, jstring string, const jchar* carray) { 1908 CHECK_JNI_ENTRY(kFlag_CritRelease | kFlag_ExcepOkay, "Esp", env, string, carray); 1909 sc.checkNonNull(carray); 1910 if (gDvmJni.forceCopy) { 1911 if (!GuardedCopy::check(carray, false)) { 1912 LOGE("JNI: failed guarded copy check in ReleaseStringCritical"); 1913 abortMaybe(); 1914 return; 1915 } 1916 carray = (const jchar*) GuardedCopy::destroy((jchar*)carray); 1917 } 1918 baseEnv(env)->ReleaseStringCritical(env, string, carray); 1919 CHECK_JNI_EXIT_VOID(); 1920} 1921 1922static jweak Check_NewWeakGlobalRef(JNIEnv* env, jobject obj) { 1923 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj); 1924 return CHECK_JNI_EXIT("L", baseEnv(env)->NewWeakGlobalRef(env, obj)); 1925} 1926 1927static void Check_DeleteWeakGlobalRef(JNIEnv* env, jweak obj) { 1928 CHECK_JNI_ENTRY(kFlag_Default | kFlag_ExcepOkay, "EL", env, obj); 1929 baseEnv(env)->DeleteWeakGlobalRef(env, obj); 1930 CHECK_JNI_EXIT_VOID(); 1931} 1932 1933static jboolean Check_ExceptionCheck(JNIEnv* env) { 1934 CHECK_JNI_ENTRY(kFlag_CritOkay | kFlag_ExcepOkay, "E", env); 1935 return CHECK_JNI_EXIT("b", baseEnv(env)->ExceptionCheck(env)); 1936} 1937 1938static jobjectRefType Check_GetObjectRefType(JNIEnv* env, jobject obj) { 1939 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, obj); 1940 // TODO: proper decoding of jobjectRefType! 1941 return CHECK_JNI_EXIT("I", baseEnv(env)->GetObjectRefType(env, obj)); 1942} 1943 1944static jobject Check_NewDirectByteBuffer(JNIEnv* env, void* address, jlong capacity) { 1945 CHECK_JNI_ENTRY(kFlag_Default, "EpJ", env, address, capacity); 1946 if (address == NULL || capacity < 0) { 1947 LOGW("JNI WARNING: invalid values for address (%p) or capacity (%ld)", 1948 address, (long) capacity); 1949 abortMaybe(); 1950 return NULL; 1951 } 1952 return CHECK_JNI_EXIT("L", baseEnv(env)->NewDirectByteBuffer(env, address, capacity)); 1953} 1954 1955static void* Check_GetDirectBufferAddress(JNIEnv* env, jobject buf) { 1956 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, buf); 1957 // TODO: check that 'buf' is a java.nio.Buffer. 1958 return CHECK_JNI_EXIT("p", baseEnv(env)->GetDirectBufferAddress(env, buf)); 1959} 1960 1961static jlong Check_GetDirectBufferCapacity(JNIEnv* env, jobject buf) { 1962 CHECK_JNI_ENTRY(kFlag_Default, "EL", env, buf); 1963 // TODO: check that 'buf' is a java.nio.Buffer. 1964 return CHECK_JNI_EXIT("J", baseEnv(env)->GetDirectBufferCapacity(env, buf)); 1965} 1966 1967 1968/* 1969 * =========================================================================== 1970 * JNI invocation functions 1971 * =========================================================================== 1972 */ 1973 1974static jint Check_DestroyJavaVM(JavaVM* vm) { 1975 ScopedCheck sc(false, __FUNCTION__); 1976 sc.check(true, "v", vm); 1977 return CHECK_JNI_EXIT("I", baseVm(vm)->DestroyJavaVM(vm)); 1978} 1979 1980static jint Check_AttachCurrentThread(JavaVM* vm, JNIEnv** p_env, void* thr_args) { 1981 ScopedCheck sc(false, __FUNCTION__); 1982 sc.check(true, "vpp", vm, p_env, thr_args); 1983 return CHECK_JNI_EXIT("I", baseVm(vm)->AttachCurrentThread(vm, p_env, thr_args)); 1984} 1985 1986static jint Check_AttachCurrentThreadAsDaemon(JavaVM* vm, JNIEnv** p_env, void* thr_args) { 1987 ScopedCheck sc(false, __FUNCTION__); 1988 sc.check(true, "vpp", vm, p_env, thr_args); 1989 return CHECK_JNI_EXIT("I", baseVm(vm)->AttachCurrentThreadAsDaemon(vm, p_env, thr_args)); 1990} 1991 1992static jint Check_DetachCurrentThread(JavaVM* vm) { 1993 ScopedCheck sc(true, __FUNCTION__); 1994 sc.check(true, "v", vm); 1995 return CHECK_JNI_EXIT("I", baseVm(vm)->DetachCurrentThread(vm)); 1996} 1997 1998static jint Check_GetEnv(JavaVM* vm, void** env, jint version) { 1999 ScopedCheck sc(true, __FUNCTION__); 2000 sc.check(true, "v", vm); 2001 return CHECK_JNI_EXIT("I", baseVm(vm)->GetEnv(vm, env, version)); 2002} 2003 2004 2005/* 2006 * =========================================================================== 2007 * Function tables 2008 * =========================================================================== 2009 */ 2010 2011static const struct JNINativeInterface gCheckNativeInterface = { 2012 NULL, 2013 NULL, 2014 NULL, 2015 NULL, 2016 2017 Check_GetVersion, 2018 2019 Check_DefineClass, 2020 Check_FindClass, 2021 2022 Check_FromReflectedMethod, 2023 Check_FromReflectedField, 2024 Check_ToReflectedMethod, 2025 2026 Check_GetSuperclass, 2027 Check_IsAssignableFrom, 2028 2029 Check_ToReflectedField, 2030 2031 Check_Throw, 2032 Check_ThrowNew, 2033 Check_ExceptionOccurred, 2034 Check_ExceptionDescribe, 2035 Check_ExceptionClear, 2036 Check_FatalError, 2037 2038 Check_PushLocalFrame, 2039 Check_PopLocalFrame, 2040 2041 Check_NewGlobalRef, 2042 Check_DeleteGlobalRef, 2043 Check_DeleteLocalRef, 2044 Check_IsSameObject, 2045 Check_NewLocalRef, 2046 Check_EnsureLocalCapacity, 2047 2048 Check_AllocObject, 2049 Check_NewObject, 2050 Check_NewObjectV, 2051 Check_NewObjectA, 2052 2053 Check_GetObjectClass, 2054 Check_IsInstanceOf, 2055 2056 Check_GetMethodID, 2057 2058 Check_CallObjectMethod, 2059 Check_CallObjectMethodV, 2060 Check_CallObjectMethodA, 2061 Check_CallBooleanMethod, 2062 Check_CallBooleanMethodV, 2063 Check_CallBooleanMethodA, 2064 Check_CallByteMethod, 2065 Check_CallByteMethodV, 2066 Check_CallByteMethodA, 2067 Check_CallCharMethod, 2068 Check_CallCharMethodV, 2069 Check_CallCharMethodA, 2070 Check_CallShortMethod, 2071 Check_CallShortMethodV, 2072 Check_CallShortMethodA, 2073 Check_CallIntMethod, 2074 Check_CallIntMethodV, 2075 Check_CallIntMethodA, 2076 Check_CallLongMethod, 2077 Check_CallLongMethodV, 2078 Check_CallLongMethodA, 2079 Check_CallFloatMethod, 2080 Check_CallFloatMethodV, 2081 Check_CallFloatMethodA, 2082 Check_CallDoubleMethod, 2083 Check_CallDoubleMethodV, 2084 Check_CallDoubleMethodA, 2085 Check_CallVoidMethod, 2086 Check_CallVoidMethodV, 2087 Check_CallVoidMethodA, 2088 2089 Check_CallNonvirtualObjectMethod, 2090 Check_CallNonvirtualObjectMethodV, 2091 Check_CallNonvirtualObjectMethodA, 2092 Check_CallNonvirtualBooleanMethod, 2093 Check_CallNonvirtualBooleanMethodV, 2094 Check_CallNonvirtualBooleanMethodA, 2095 Check_CallNonvirtualByteMethod, 2096 Check_CallNonvirtualByteMethodV, 2097 Check_CallNonvirtualByteMethodA, 2098 Check_CallNonvirtualCharMethod, 2099 Check_CallNonvirtualCharMethodV, 2100 Check_CallNonvirtualCharMethodA, 2101 Check_CallNonvirtualShortMethod, 2102 Check_CallNonvirtualShortMethodV, 2103 Check_CallNonvirtualShortMethodA, 2104 Check_CallNonvirtualIntMethod, 2105 Check_CallNonvirtualIntMethodV, 2106 Check_CallNonvirtualIntMethodA, 2107 Check_CallNonvirtualLongMethod, 2108 Check_CallNonvirtualLongMethodV, 2109 Check_CallNonvirtualLongMethodA, 2110 Check_CallNonvirtualFloatMethod, 2111 Check_CallNonvirtualFloatMethodV, 2112 Check_CallNonvirtualFloatMethodA, 2113 Check_CallNonvirtualDoubleMethod, 2114 Check_CallNonvirtualDoubleMethodV, 2115 Check_CallNonvirtualDoubleMethodA, 2116 Check_CallNonvirtualVoidMethod, 2117 Check_CallNonvirtualVoidMethodV, 2118 Check_CallNonvirtualVoidMethodA, 2119 2120 Check_GetFieldID, 2121 2122 Check_GetObjectField, 2123 Check_GetBooleanField, 2124 Check_GetByteField, 2125 Check_GetCharField, 2126 Check_GetShortField, 2127 Check_GetIntField, 2128 Check_GetLongField, 2129 Check_GetFloatField, 2130 Check_GetDoubleField, 2131 Check_SetObjectField, 2132 Check_SetBooleanField, 2133 Check_SetByteField, 2134 Check_SetCharField, 2135 Check_SetShortField, 2136 Check_SetIntField, 2137 Check_SetLongField, 2138 Check_SetFloatField, 2139 Check_SetDoubleField, 2140 2141 Check_GetStaticMethodID, 2142 2143 Check_CallStaticObjectMethod, 2144 Check_CallStaticObjectMethodV, 2145 Check_CallStaticObjectMethodA, 2146 Check_CallStaticBooleanMethod, 2147 Check_CallStaticBooleanMethodV, 2148 Check_CallStaticBooleanMethodA, 2149 Check_CallStaticByteMethod, 2150 Check_CallStaticByteMethodV, 2151 Check_CallStaticByteMethodA, 2152 Check_CallStaticCharMethod, 2153 Check_CallStaticCharMethodV, 2154 Check_CallStaticCharMethodA, 2155 Check_CallStaticShortMethod, 2156 Check_CallStaticShortMethodV, 2157 Check_CallStaticShortMethodA, 2158 Check_CallStaticIntMethod, 2159 Check_CallStaticIntMethodV, 2160 Check_CallStaticIntMethodA, 2161 Check_CallStaticLongMethod, 2162 Check_CallStaticLongMethodV, 2163 Check_CallStaticLongMethodA, 2164 Check_CallStaticFloatMethod, 2165 Check_CallStaticFloatMethodV, 2166 Check_CallStaticFloatMethodA, 2167 Check_CallStaticDoubleMethod, 2168 Check_CallStaticDoubleMethodV, 2169 Check_CallStaticDoubleMethodA, 2170 Check_CallStaticVoidMethod, 2171 Check_CallStaticVoidMethodV, 2172 Check_CallStaticVoidMethodA, 2173 2174 Check_GetStaticFieldID, 2175 2176 Check_GetStaticObjectField, 2177 Check_GetStaticBooleanField, 2178 Check_GetStaticByteField, 2179 Check_GetStaticCharField, 2180 Check_GetStaticShortField, 2181 Check_GetStaticIntField, 2182 Check_GetStaticLongField, 2183 Check_GetStaticFloatField, 2184 Check_GetStaticDoubleField, 2185 2186 Check_SetStaticObjectField, 2187 Check_SetStaticBooleanField, 2188 Check_SetStaticByteField, 2189 Check_SetStaticCharField, 2190 Check_SetStaticShortField, 2191 Check_SetStaticIntField, 2192 Check_SetStaticLongField, 2193 Check_SetStaticFloatField, 2194 Check_SetStaticDoubleField, 2195 2196 Check_NewString, 2197 2198 Check_GetStringLength, 2199 Check_GetStringChars, 2200 Check_ReleaseStringChars, 2201 2202 Check_NewStringUTF, 2203 Check_GetStringUTFLength, 2204 Check_GetStringUTFChars, 2205 Check_ReleaseStringUTFChars, 2206 2207 Check_GetArrayLength, 2208 Check_NewObjectArray, 2209 Check_GetObjectArrayElement, 2210 Check_SetObjectArrayElement, 2211 2212 Check_NewBooleanArray, 2213 Check_NewByteArray, 2214 Check_NewCharArray, 2215 Check_NewShortArray, 2216 Check_NewIntArray, 2217 Check_NewLongArray, 2218 Check_NewFloatArray, 2219 Check_NewDoubleArray, 2220 2221 Check_GetBooleanArrayElements, 2222 Check_GetByteArrayElements, 2223 Check_GetCharArrayElements, 2224 Check_GetShortArrayElements, 2225 Check_GetIntArrayElements, 2226 Check_GetLongArrayElements, 2227 Check_GetFloatArrayElements, 2228 Check_GetDoubleArrayElements, 2229 2230 Check_ReleaseBooleanArrayElements, 2231 Check_ReleaseByteArrayElements, 2232 Check_ReleaseCharArrayElements, 2233 Check_ReleaseShortArrayElements, 2234 Check_ReleaseIntArrayElements, 2235 Check_ReleaseLongArrayElements, 2236 Check_ReleaseFloatArrayElements, 2237 Check_ReleaseDoubleArrayElements, 2238 2239 Check_GetBooleanArrayRegion, 2240 Check_GetByteArrayRegion, 2241 Check_GetCharArrayRegion, 2242 Check_GetShortArrayRegion, 2243 Check_GetIntArrayRegion, 2244 Check_GetLongArrayRegion, 2245 Check_GetFloatArrayRegion, 2246 Check_GetDoubleArrayRegion, 2247 Check_SetBooleanArrayRegion, 2248 Check_SetByteArrayRegion, 2249 Check_SetCharArrayRegion, 2250 Check_SetShortArrayRegion, 2251 Check_SetIntArrayRegion, 2252 Check_SetLongArrayRegion, 2253 Check_SetFloatArrayRegion, 2254 Check_SetDoubleArrayRegion, 2255 2256 Check_RegisterNatives, 2257 Check_UnregisterNatives, 2258 2259 Check_MonitorEnter, 2260 Check_MonitorExit, 2261 2262 Check_GetJavaVM, 2263 2264 Check_GetStringRegion, 2265 Check_GetStringUTFRegion, 2266 2267 Check_GetPrimitiveArrayCritical, 2268 Check_ReleasePrimitiveArrayCritical, 2269 2270 Check_GetStringCritical, 2271 Check_ReleaseStringCritical, 2272 2273 Check_NewWeakGlobalRef, 2274 Check_DeleteWeakGlobalRef, 2275 2276 Check_ExceptionCheck, 2277 2278 Check_NewDirectByteBuffer, 2279 Check_GetDirectBufferAddress, 2280 Check_GetDirectBufferCapacity, 2281 2282 Check_GetObjectRefType 2283}; 2284 2285static const struct JNIInvokeInterface gCheckInvokeInterface = { 2286 NULL, 2287 NULL, 2288 NULL, 2289 2290 Check_DestroyJavaVM, 2291 Check_AttachCurrentThread, 2292 Check_DetachCurrentThread, 2293 2294 Check_GetEnv, 2295 2296 Check_AttachCurrentThreadAsDaemon, 2297}; 2298 2299/* 2300 * Replace the normal table with the checked table. 2301 */ 2302void dvmUseCheckedJniEnv(JNIEnvExt* pEnv) { 2303 assert(pEnv->funcTable != &gCheckNativeInterface); 2304 pEnv->baseFuncTable = pEnv->funcTable; 2305 pEnv->funcTable = &gCheckNativeInterface; 2306} 2307 2308/* 2309 * Replace the normal table with the checked table. 2310 */ 2311void dvmUseCheckedJniVm(JavaVMExt* pVm) { 2312 assert(pVm->funcTable != &gCheckInvokeInterface); 2313 pVm->baseFuncTable = pVm->funcTable; 2314 pVm->funcTable = &gCheckInvokeInterface; 2315} 2316