indirect_reference_table.cc revision 987560fee798e48fb725c44b796d8ca7a5872ad6
16c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes/* 26c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * Copyright (C) 2009 The Android Open Source Project 36c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * 46c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 56c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * you may not use this file except in compliance with the License. 66c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * You may obtain a copy of the License at 76c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * 86c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 96c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * 106c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * Unless required by applicable law or agreed to in writing, software 116c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 126c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 136c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * See the License for the specific language governing permissions and 146c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes * limitations under the License. 156c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes */ 166c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 176c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes#include "indirect_reference_table.h" 18a2501990dd0f68baf38ce19251949d7bb3ecfe5aElliott Hughes#include "jni_internal.h" 196c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes#include "reference_table.h" 20a2501990dd0f68baf38ce19251949d7bb3ecfe5aElliott Hughes#include "runtime.h" 2100f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers#include "scoped_thread_state_change.h" 225a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers#include "thread.h" 23cdd1d2d3fee0711b8b11db99f2dfb80113520100Ian Rogers#include "utils.h" 246dda898d47b3e8931e4404330e81b7110108e34fMathieu Chartier#include "verify_object-inl.h" 256c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 266c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes#include <cstdlib> 276c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 286c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughesnamespace art { 296c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 30719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogerstemplate<typename T> 31719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogersclass MutatorLockedDumpable { 32719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers public: 33719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers explicit MutatorLockedDumpable(T& value) 34719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) : value_(value) { 35719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers } 36719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers 37719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers void Dump(std::ostream& os) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 38719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers value_.Dump(os); 39719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers } 40719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers 41719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers private: 42719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers T& value_; 43719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers 44719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers DISALLOW_COPY_AND_ASSIGN(MutatorLockedDumpable); 45719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers}; 46719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers 47719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogerstemplate<typename T> 48719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogersstd::ostream& operator<<(std::ostream& os, const MutatorLockedDumpable<T>& rhs) 49719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers// TODO: should be SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) however annotalysis 50719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers// currently fails for this. 51719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers NO_THREAD_SAFETY_ANALYSIS { 52719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers rhs.Dump(os); 53719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers return os; 54719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers} 55719d1a33f6569864f529e5a3fff59e7bca97aad0Ian Rogers 566c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughesstatic void AbortMaybe() { 57a2501990dd0f68baf38ce19251949d7bb3ecfe5aElliott Hughes // If -Xcheck:jni is on, it'll give a more detailed error before aborting. 58a2501990dd0f68baf38ce19251949d7bb3ecfe5aElliott Hughes if (!Runtime::Current()->GetJavaVM()->check_jni) { 59a2501990dd0f68baf38ce19251949d7bb3ecfe5aElliott Hughes // Otherwise, we want to abort rather than hand back a bad reference. 60a2501990dd0f68baf38ce19251949d7bb3ecfe5aElliott Hughes LOG(FATAL) << "JNI ERROR (app bug): see above."; 61a2501990dd0f68baf38ce19251949d7bb3ecfe5aElliott Hughes } 626c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 636c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 646c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott HughesIndirectReferenceTable::IndirectReferenceTable(size_t initialCount, 65ba8eee10607a524f43b55a6f33c13924fb16d435Elliott Hughes size_t maxCount, IndirectRefKind desiredKind) { 666c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes CHECK_GT(initialCount, 0U); 676c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes CHECK_LE(initialCount, maxCount); 68408f79aeb676251ba35667a64e86c20638d7cb0bIan Rogers CHECK_NE(desiredKind, kSirtOrInvalid); 696c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 70423d2a3dcbb260b020efb5da59f784c9f02accbfMathieu Chartier table_ = reinterpret_cast<mirror::Object**>(malloc(initialCount * sizeof(const mirror::Object*))); 716c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes CHECK(table_ != NULL); 722dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers memset(table_, 0xd1, initialCount * sizeof(const mirror::Object*)); 736c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 746c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes slot_data_ = reinterpret_cast<IndirectRefSlot*>(calloc(initialCount, sizeof(IndirectRefSlot))); 756c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes CHECK(slot_data_ != NULL); 766c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 77dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers segment_state_.all = IRT_FIRST_SEGMENT; 786c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes alloc_entries_ = initialCount; 796c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes max_entries_ = maxCount; 806c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes kind_ = desiredKind; 816c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 826c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 836c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott HughesIndirectReferenceTable::~IndirectReferenceTable() { 846c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes free(table_); 856c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes free(slot_data_); 866c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes table_ = NULL; 876c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes slot_data_ = NULL; 886c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes alloc_entries_ = max_entries_ = -1; 896c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 906c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 9173e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// Make sure that the entry at "idx" is correctly paired with "iref". 926c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughesbool IndirectReferenceTable::CheckEntry(const char* what, IndirectRef iref, int idx) const { 932dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers const mirror::Object* obj = table_[idx]; 946c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes IndirectRef checkRef = ToIndirectRef(obj, idx); 954f6ad8ab428038129b2d0d6c40b7fd625cca15e1Ian Rogers if (UNLIKELY(checkRef != iref)) { 966c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes LOG(ERROR) << "JNI ERROR (app bug): attempt to " << what 976c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes << " stale " << kind_ << " " << iref 986c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes << " (should be " << checkRef << ")"; 996c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes AbortMaybe(); 1006c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 1016c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 1026c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return true; 1036c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 1046c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 105423d2a3dcbb260b020efb5da59f784c9f02accbfMathieu ChartierIndirectRef IndirectReferenceTable::Add(uint32_t cookie, mirror::Object* obj) { 1066c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes IRTSegmentState prevState; 1076c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes prevState.all = cookie; 108dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers size_t topIndex = segment_state_.parts.topIndex; 1096c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 110cd2cfff09c916c9e72a7cfeb0686b441847dc62eMathieu Chartier CHECK(obj != NULL); 1116dda898d47b3e8931e4404330e81b7110108e34fMathieu Chartier VerifyObject(obj); 1126c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes DCHECK(table_ != NULL); 1136c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes DCHECK_LE(alloc_entries_, max_entries_); 114dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers DCHECK_GE(segment_state_.parts.numHoles, prevState.parts.numHoles); 1156c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 1166c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (topIndex == alloc_entries_) { 11773e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes // reached end of allocated space; did we hit buffer max? 1186c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (topIndex == max_entries_) { 11973e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes LOG(FATAL) << "JNI ERROR (app bug): " << kind_ << " table overflow " 12073e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes << "(max=" << max_entries_ << ")\n" 12100f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers << MutatorLockedDumpable<IndirectReferenceTable>(*this); 1226c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 1236c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 1246c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes size_t newSize = alloc_entries_ * 2; 1256c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (newSize > max_entries_) { 1266c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes newSize = max_entries_; 1276c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 1286c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes DCHECK_GT(newSize, alloc_entries_); 1296c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 130423d2a3dcbb260b020efb5da59f784c9f02accbfMathieu Chartier table_ = reinterpret_cast<mirror::Object**>(realloc(table_, newSize * sizeof(mirror::Object*))); 13100f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers slot_data_ = reinterpret_cast<IndirectRefSlot*>(realloc(slot_data_, 13200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers newSize * sizeof(IndirectRefSlot))); 1336c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (table_ == NULL || slot_data_ == NULL) { 13473e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes LOG(FATAL) << "JNI ERROR (app bug): unable to expand " 1356c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes << kind_ << " table (from " 1366c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes << alloc_entries_ << " to " << newSize 13773e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes << ", max=" << max_entries_ << ")\n" 13800f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers << MutatorLockedDumpable<IndirectReferenceTable>(*this); 1396c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 1406c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 1416c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes // Clear the newly-allocated slot_data_ elements. 1426c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes memset(slot_data_ + alloc_entries_, 0, (newSize - alloc_entries_) * sizeof(IndirectRefSlot)); 1436c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 1446c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes alloc_entries_ = newSize; 1456c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 1466c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 14773e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes // We know there's enough room in the table. Now we just need to find 14873e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes // the right spot. If there's a hole, find it and fill it; otherwise, 14973e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes // add to the end of the list. 1506c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes IndirectRef result; 151dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers int numHoles = segment_state_.parts.numHoles - prevState.parts.numHoles; 1526c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (numHoles > 0) { 1536c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes DCHECK_GT(topIndex, 1U); 15473e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes // Find the first hole; likely to be near the end of the list. 155423d2a3dcbb260b020efb5da59f784c9f02accbfMathieu Chartier mirror::Object** pScan = &table_[topIndex - 1]; 1566c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes DCHECK(*pScan != NULL); 1576c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes while (*--pScan != NULL) { 1586c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes DCHECK_GE(pScan, table_ + prevState.parts.topIndex); 1596c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 1606c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes UpdateSlotAdd(obj, pScan - table_); 1616c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes result = ToIndirectRef(obj, pScan - table_); 1626c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes *pScan = obj; 163dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers segment_state_.parts.numHoles--; 1646c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } else { 16573e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes // Add to the end. 1666c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes UpdateSlotAdd(obj, topIndex); 1676c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes result = ToIndirectRef(obj, topIndex); 1686c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes table_[topIndex++] = obj; 169dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers segment_state_.parts.topIndex = topIndex; 1706c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 1715a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers if (false) { 1725a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers LOG(INFO) << "+++ added at " << ExtractIndex(result) << " top=" << segment_state_.parts.topIndex 1735a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers << " holes=" << segment_state_.parts.numHoles; 1745a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers } 1756c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 1766c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes DCHECK(result != NULL); 1776c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return result; 1786c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 1796c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 180726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughesvoid IndirectReferenceTable::AssertEmpty() { 18100f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers if (UNLIKELY(begin() != end())) { 18200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(Thread::Current()); 18373e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes LOG(FATAL) << "Internal Error: non-empty local reference table\n" 18400f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers << MutatorLockedDumpable<IndirectReferenceTable>(*this); 185726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughes } 186726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughes} 187726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughes 18873e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// Verifies that the indirect table lookup is valid. 18973e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// Returns "false" if something looks bad. 1906c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughesbool IndirectReferenceTable::GetChecked(IndirectRef iref) const { 1914f6ad8ab428038129b2d0d6c40b7fd625cca15e1Ian Rogers if (UNLIKELY(iref == NULL)) { 1926c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes LOG(WARNING) << "Attempt to look up NULL " << kind_; 1936c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 1946c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 1954f6ad8ab428038129b2d0d6c40b7fd625cca15e1Ian Rogers if (UNLIKELY(GetIndirectRefKind(iref) == kSirtOrInvalid)) { 1966c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes LOG(ERROR) << "JNI ERROR (app bug): invalid " << kind_ << " " << iref; 1976c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes AbortMaybe(); 1986c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 1996c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2006c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 201dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers int topIndex = segment_state_.parts.topIndex; 2026c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes int idx = ExtractIndex(iref); 2034f6ad8ab428038129b2d0d6c40b7fd625cca15e1Ian Rogers if (UNLIKELY(idx >= topIndex)) { 2045a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers LOG(ERROR) << "JNI ERROR (app bug): accessed stale " << kind_ << " " 2055a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers << iref << " (index " << idx << " in a table of size " << topIndex << ")"; 2066c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes AbortMaybe(); 2076c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 2086c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2096c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2104f6ad8ab428038129b2d0d6c40b7fd625cca15e1Ian Rogers if (UNLIKELY(table_[idx] == NULL)) { 2116c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes LOG(ERROR) << "JNI ERROR (app bug): accessed deleted " << kind_ << " " << iref; 2126c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes AbortMaybe(); 2136c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 2146c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2156c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2164f6ad8ab428038129b2d0d6c40b7fd625cca15e1Ian Rogers if (UNLIKELY(!CheckEntry("use", iref, idx))) { 2176c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 2186c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2196c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2206c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return true; 2216c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 2226c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 223423d2a3dcbb260b020efb5da59f784c9f02accbfMathieu Chartierstatic int Find(mirror::Object* direct_pointer, int bottomIndex, int topIndex, 224423d2a3dcbb260b020efb5da59f784c9f02accbfMathieu Chartier mirror::Object** table) { 2256c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes for (int i = bottomIndex; i < topIndex; ++i) { 2262ced6a534157d5d963693346904389c19775d2daElliott Hughes if (table[i] == direct_pointer) { 2276c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return i; 2286c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2296c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2306c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return -1; 2316c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 2326c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2332dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogersbool IndirectReferenceTable::ContainsDirectPointer(mirror::Object* direct_pointer) const { 2342ced6a534157d5d963693346904389c19775d2daElliott Hughes return Find(direct_pointer, 0, segment_state_.parts.topIndex, table_) != -1; 2356c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 2366c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 23773e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// Removes an object. We extract the table offset bits from "iref" 23873e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// and zap the corresponding entry, leaving a hole if it's not at the top. 23973e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// If the entry is not between the current top index and the bottom index 24073e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// specified by the cookie, we don't remove anything. This is the behavior 24173e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// required by JNI's DeleteLocalRef function. 24273e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// This method is not called when a local frame is popped; this is only used 24373e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// for explicit single removals. 24473e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes// Returns "false" if nothing was removed. 2456c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughesbool IndirectReferenceTable::Remove(uint32_t cookie, IndirectRef iref) { 2466c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes IRTSegmentState prevState; 2476c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes prevState.all = cookie; 248dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers int topIndex = segment_state_.parts.topIndex; 2496c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes int bottomIndex = prevState.parts.topIndex; 2506c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2516c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes DCHECK(table_ != NULL); 2526c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes DCHECK_LE(alloc_entries_, max_entries_); 253dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers DCHECK_GE(segment_state_.parts.numHoles, prevState.parts.numHoles); 2546c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2556c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes int idx = ExtractIndex(iref); 2566c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2575a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers if (GetIndirectRefKind(iref) == kSirtOrInvalid && 2580399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers Thread::Current()->SirtContains(reinterpret_cast<jobject>(iref))) { 2595a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers LOG(WARNING) << "Attempt to remove local SIRT entry from IRT, ignoring"; 2605a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers return true; 2615a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers } 2626c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2636c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (idx < bottomIndex) { 264726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughes // Wrong segment. 265726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughes LOG(WARNING) << "Attempt to remove index outside index area (" << idx 266726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughes << " vs " << bottomIndex << "-" << topIndex << ")"; 2676c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 2686c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2696c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (idx >= topIndex) { 270726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughes // Bad --- stale reference? 271726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughes LOG(WARNING) << "Attempt to remove invalid index " << idx 272726079d3e2e50854cd6ca4c393f4529a796dba58Elliott Hughes << " (bottom=" << bottomIndex << " top=" << topIndex << ")"; 2736c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 2746c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2756c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2766c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (idx == topIndex-1) { 2776c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes // Top-most entry. Scan up and consume holes. 2786c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 279987560fee798e48fb725c44b796d8ca7a5872ad6Ian Rogers if (!CheckEntry("remove", iref, idx)) { 2806c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 2816c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2826c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 2836c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes table_[idx] = NULL; 284dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers int numHoles = segment_state_.parts.numHoles - prevState.parts.numHoles; 2856c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (numHoles != 0) { 2866c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes while (--topIndex > bottomIndex && numHoles != 0) { 2875a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers if (false) { 2885a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers LOG(INFO) << "+++ checking for hole at " << topIndex-1 2895a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers << " (cookie=" << cookie << ") val=" << table_[topIndex - 1]; 2905a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers } 2916c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (table_[topIndex-1] != NULL) { 2926c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes break; 2936c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 2945a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers if (false) { 2955a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers LOG(INFO) << "+++ ate hole at " << (topIndex - 1); 2965a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers } 2976c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes numHoles--; 2986c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 299dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers segment_state_.parts.numHoles = numHoles + prevState.parts.numHoles; 300dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers segment_state_.parts.topIndex = topIndex; 3016c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } else { 302dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers segment_state_.parts.topIndex = topIndex-1; 3035a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers if (false) { 3045a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers LOG(INFO) << "+++ ate last entry " << topIndex - 1; 3055a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers } 3066c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 3076c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } else { 30873e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes // Not the top-most entry. This creates a hole. We NULL out the 30973e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes // entry to prevent somebody from deleting it twice and screwing up 31073e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes // the hole count. 3116c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes if (table_[idx] == NULL) { 3126c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes LOG(INFO) << "--- WEIRD: removing null entry " << idx; 3136c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 3146c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 315987560fee798e48fb725c44b796d8ca7a5872ad6Ian Rogers if (!CheckEntry("remove", iref, idx)) { 3166c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return false; 3176c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 3186c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 3196c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes table_[idx] = NULL; 320dc51b79e65abcdad094ccd5e5a2caf5153433d49Ian Rogers segment_state_.parts.numHoles++; 3215a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers if (false) { 3225a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers LOG(INFO) << "+++ left hole at " << idx << ", holes=" << segment_state_.parts.numHoles; 3235a7a74a042e73a355f5cedffa0d2faf5340028faIan Rogers } 3246c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes } 3256c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 3266c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes return true; 3276c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 3286c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 32983c8ee000d525017ead8753fce6bc1020249b96aMathieu Chartiervoid IndirectReferenceTable::VisitRoots(RootCallback* callback, void* arg, uint32_t tid, 33083c8ee000d525017ead8753fce6bc1020249b96aMathieu Chartier RootType root_type) { 33102e25119b15a6f619f17db99f5d05124a5807ff3Mathieu Chartier for (auto ref : *this) { 332815873ecc312b1d231acce71e1a16f42cdaf09f2Mathieu Chartier callback(ref, arg, tid, root_type); 333423d2a3dcbb260b020efb5da59f784c9f02accbfMathieu Chartier DCHECK(*ref != nullptr); 334410c0c876f326e14c176a39ba21fc4dd3f7db8abElliott Hughes } 335410c0c876f326e14c176a39ba21fc4dd3f7db8abElliott Hughes} 336410c0c876f326e14c176a39ba21fc4dd3f7db8abElliott Hughes 33773e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughesvoid IndirectReferenceTable::Dump(std::ostream& os) const { 33873e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes os << kind_ << " table dump:\n"; 339423d2a3dcbb260b020efb5da59f784c9f02accbfMathieu Chartier ReferenceTable::Table entries(table_, table_ + Capacity()); 34063818dc8b06af4a1e65c41b453f1a42166c22728Ian Rogers // Remove NULLs. 34163818dc8b06af4a1e65c41b453f1a42166c22728Ian Rogers for (int i = entries.size() - 1; i >= 0; --i) { 34263818dc8b06af4a1e65c41b453f1a42166c22728Ian Rogers if (entries[i] == NULL) { 34363818dc8b06af4a1e65c41b453f1a42166c22728Ian Rogers entries.erase(entries.begin() + i); 34463818dc8b06af4a1e65c41b453f1a42166c22728Ian Rogers } 34563818dc8b06af4a1e65c41b453f1a42166c22728Ian Rogers } 34673e66f73f5093b64f2b023ebbb85916a13d5c937Elliott Hughes ReferenceTable::Dump(os, entries); 3476c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} 3486c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes 349c645f1ddb7c40bea6a38eda4b3f83f6b6dec405bMathieu Chartiermirror::Object* IndirectReferenceTable::Get(IndirectRef iref) const { 350c645f1ddb7c40bea6a38eda4b3f83f6b6dec405bMathieu Chartier if (!GetChecked(iref)) { 351c645f1ddb7c40bea6a38eda4b3f83f6b6dec405bMathieu Chartier return kInvalidIndirectRefObject; 352c645f1ddb7c40bea6a38eda4b3f83f6b6dec405bMathieu Chartier } 353c645f1ddb7c40bea6a38eda4b3f83f6b6dec405bMathieu Chartier mirror::Object* obj = table_[ExtractIndex(iref)];; 3545647d189c3ea5324e569d96cef67c87879d6cd05Mathieu Chartier if (obj != kClearedJniWeakGlobal) { 3555647d189c3ea5324e569d96cef67c87879d6cd05Mathieu Chartier VerifyObject(obj); 3565647d189c3ea5324e569d96cef67c87879d6cd05Mathieu Chartier } 357c645f1ddb7c40bea6a38eda4b3f83f6b6dec405bMathieu Chartier return obj; 358c645f1ddb7c40bea6a38eda4b3f83f6b6dec405bMathieu Chartier} 359c645f1ddb7c40bea6a38eda4b3f83f6b6dec405bMathieu Chartier 3606c1a394b47c85c8d1723fc3b156a3b1b0b29a757Elliott Hughes} // namespace art 361