Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 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 | #ifndef ART_PATCHOAT_PATCHOAT_H_ |
| 18 | #define ART_PATCHOAT_PATCHOAT_H_ |
| 19 | |
| 20 | #include "base/macros.h" |
| 21 | #include "base/mutex.h" |
| 22 | #include "instruction_set.h" |
| 23 | #include "os.h" |
| 24 | #include "elf_file.h" |
| 25 | #include "elf_utils.h" |
| 26 | #include "gc/accounting/space_bitmap.h" |
| 27 | #include "gc/heap.h" |
| 28 | #include "utils.h" |
| 29 | |
| 30 | namespace art { |
| 31 | |
| 32 | class ImageHeader; |
| 33 | |
| 34 | namespace mirror { |
| 35 | class Object; |
| 36 | class Reference; |
| 37 | class Class; |
| 38 | class ArtMethod; |
Alex Light | eefbe39 | 2014-07-08 09:53:18 -0700 | [diff] [blame] | 39 | }; // namespace mirror |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 40 | |
| 41 | class PatchOat { |
| 42 | public: |
Alex Light | eefbe39 | 2014-07-08 09:53:18 -0700 | [diff] [blame] | 43 | static bool Patch(File* oat_in, off_t delta, File* oat_out, TimingLogger* timings); |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 44 | |
| 45 | static bool Patch(const std::string& art_location, off_t delta, File* art_out, InstructionSet isa, |
Alex Light | eefbe39 | 2014-07-08 09:53:18 -0700 | [diff] [blame] | 46 | TimingLogger* timings); |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 47 | |
| 48 | static bool Patch(const File* oat_in, const std::string& art_location, |
| 49 | off_t delta, File* oat_out, File* art_out, InstructionSet isa, |
Alex Light | eefbe39 | 2014-07-08 09:53:18 -0700 | [diff] [blame] | 50 | TimingLogger* timings); |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 51 | |
| 52 | private: |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 53 | // Takes ownership only of the ElfFile. All other pointers are only borrowed. |
Alex Light | eefbe39 | 2014-07-08 09:53:18 -0700 | [diff] [blame] | 54 | PatchOat(ElfFile* oat_file, off_t delta, TimingLogger* timings) |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 55 | : oat_file_(oat_file), delta_(delta), timings_(timings) {} |
| 56 | PatchOat(MemMap* image, gc::accounting::ContinuousSpaceBitmap* bitmap, |
Alex Light | eefbe39 | 2014-07-08 09:53:18 -0700 | [diff] [blame] | 57 | MemMap* heap, off_t delta, TimingLogger* timings) |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 58 | : image_(image), bitmap_(bitmap), heap_(heap), |
| 59 | delta_(delta), timings_(timings) {} |
| 60 | PatchOat(ElfFile* oat_file, MemMap* image, gc::accounting::ContinuousSpaceBitmap* bitmap, |
Alex Light | eefbe39 | 2014-07-08 09:53:18 -0700 | [diff] [blame] | 61 | MemMap* heap, off_t delta, TimingLogger* timings) |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 62 | : oat_file_(oat_file), image_(image), bitmap_(bitmap), heap_(heap), |
| 63 | delta_(delta), timings_(timings) {} |
| 64 | ~PatchOat() {} |
| 65 | |
| 66 | static void BitmapCallback(mirror::Object* obj, void* arg) |
| 67 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 68 | reinterpret_cast<PatchOat*>(arg)->VisitObject(obj); |
| 69 | } |
| 70 | |
| 71 | void VisitObject(mirror::Object* obj) |
| 72 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 73 | void FixupMethod(mirror::ArtMethod* object, mirror::ArtMethod* copy) |
| 74 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 75 | bool InHeap(mirror::Object*); |
| 76 | |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 77 | // Patches oat in place, modifying the oat_file given to the constructor. |
| 78 | bool PatchElf(); |
| 79 | bool PatchTextSection(); |
Alex Light | 4b0d2d9 | 2014-08-06 13:37:23 -0700 | [diff] [blame^] | 80 | // Templatized version to actually do the patching with the right sized offsets. |
| 81 | template <typename ptr_t> bool PatchTextSection(const Elf32_Shdr& patches_sec); |
| 82 | template <typename ptr_t> bool CheckOatFile(const Elf32_Shdr& patches_sec); |
Alex Light | a59dd80 | 2014-07-02 16:28:08 -0700 | [diff] [blame] | 83 | bool PatchOatHeader(); |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 84 | bool PatchSymbols(Elf32_Shdr* section); |
| 85 | |
| 86 | bool PatchImage() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 87 | |
| 88 | bool WriteElf(File* out); |
| 89 | bool WriteImage(File* out); |
| 90 | |
| 91 | mirror::Object* RelocatedCopyOf(mirror::Object*); |
| 92 | mirror::Object* RelocatedAddressOf(mirror::Object* obj); |
| 93 | |
Alex Light | eefbe39 | 2014-07-08 09:53:18 -0700 | [diff] [blame] | 94 | // Walks through the old image and patches the mmap'd copy of it to the new offset. It does not |
| 95 | // change the heap. |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 96 | class PatchVisitor { |
| 97 | public: |
| 98 | PatchVisitor(PatchOat* patcher, mirror::Object* copy) : patcher_(patcher), copy_(copy) {} |
| 99 | ~PatchVisitor() {} |
| 100 | void operator() (mirror::Object* obj, MemberOffset off, bool b) const |
| 101 | EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_, Locks::heap_bitmap_lock_); |
| 102 | // For reference classes. |
| 103 | void operator() (mirror::Class* cls, mirror::Reference* ref) const |
| 104 | EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_, Locks::heap_bitmap_lock_); |
| 105 | private: |
| 106 | PatchOat* patcher_; |
| 107 | mirror::Object* copy_; |
| 108 | }; |
| 109 | |
Alex Light | eefbe39 | 2014-07-08 09:53:18 -0700 | [diff] [blame] | 110 | // The elf file we are patching. |
| 111 | std::unique_ptr<ElfFile> oat_file_; |
| 112 | // A mmap of the image we are patching. This is modified. |
| 113 | const MemMap* image_; |
| 114 | // The heap we are patching. This is not modified. |
| 115 | gc::accounting::ContinuousSpaceBitmap* bitmap_; |
| 116 | // The heap we are patching. This is not modified. |
| 117 | const MemMap* heap_; |
| 118 | // The amount we are changing the offset by. |
| 119 | off_t delta_; |
| 120 | TimingLogger* timings_; |
| 121 | |
Alex Light | 53cb16b | 2014-06-12 11:26:29 -0700 | [diff] [blame] | 122 | DISALLOW_IMPLICIT_CONSTRUCTORS(PatchOat); |
| 123 | }; |
| 124 | |
| 125 | } // namespace art |
| 126 | #endif // ART_PATCHOAT_PATCHOAT_H_ |