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      1 /*
      2  * Copyright (C) 2012 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 #include "entrypoints/quick/quick_alloc_entrypoints.h"
     18 
     19 #include "art_method-inl.h"
     20 #include "base/enums.h"
     21 #include "callee_save_frame.h"
     22 #include "dex_file_types.h"
     23 #include "entrypoints/entrypoint_utils-inl.h"
     24 #include "mirror/class-inl.h"
     25 #include "mirror/object_array-inl.h"
     26 #include "mirror/object-inl.h"
     27 
     28 namespace art {
     29 
     30 static constexpr bool kUseTlabFastPath = true;
     31 
     32 template <bool kInitialized,
     33           bool kFinalize,
     34           bool kInstrumented,
     35           gc::AllocatorType allocator_type>
     36 static ALWAYS_INLINE inline mirror::Object* artAllocObjectFromCode(
     37     mirror::Class* klass,
     38     Thread* self) REQUIRES_SHARED(Locks::mutator_lock_) {
     39   ScopedQuickEntrypointChecks sqec(self);
     40   DCHECK(klass != nullptr);
     41   if (kUseTlabFastPath && !kInstrumented && allocator_type == gc::kAllocatorTypeTLAB) {
     42     if (kInitialized || klass->IsInitialized()) {
     43       if (!kFinalize || !klass->IsFinalizable()) {
     44         size_t byte_count = klass->GetObjectSize();
     45         byte_count = RoundUp(byte_count, gc::space::BumpPointerSpace::kAlignment);
     46         mirror::Object* obj;
     47         if (LIKELY(byte_count < self->TlabSize())) {
     48           obj = self->AllocTlab(byte_count);
     49           DCHECK(obj != nullptr) << "AllocTlab can't fail";
     50           obj->SetClass(klass);
     51           if (kUseBakerReadBarrier) {
     52             obj->AssertReadBarrierState();
     53           }
     54           QuasiAtomic::ThreadFenceForConstructor();
     55           return obj;
     56         }
     57       }
     58     }
     59   }
     60   if (kInitialized) {
     61     return AllocObjectFromCodeInitialized<kInstrumented>(klass, self, allocator_type);
     62   } else if (!kFinalize) {
     63     return AllocObjectFromCodeResolved<kInstrumented>(klass, self, allocator_type);
     64   } else {
     65     return AllocObjectFromCode<kInstrumented>(klass, self, allocator_type);
     66   }
     67 }
     68 
     69 #define GENERATE_ENTRYPOINTS_FOR_ALLOCATOR_INST(suffix, suffix2, instrumented_bool, allocator_type) \
     70 extern "C" mirror::Object* artAllocObjectFromCodeWithChecks##suffix##suffix2( \
     71     mirror::Class* klass, Thread* self) \
     72     REQUIRES_SHARED(Locks::mutator_lock_) { \
     73   return artAllocObjectFromCode<false, true, instrumented_bool, allocator_type>(klass, self); \
     74 } \
     75 extern "C" mirror::Object* artAllocObjectFromCodeResolved##suffix##suffix2( \
     76     mirror::Class* klass, Thread* self) \
     77     REQUIRES_SHARED(Locks::mutator_lock_) { \
     78   return artAllocObjectFromCode<false, false, instrumented_bool, allocator_type>(klass, self); \
     79 } \
     80 extern "C" mirror::Object* artAllocObjectFromCodeInitialized##suffix##suffix2( \
     81     mirror::Class* klass, Thread* self) \
     82     REQUIRES_SHARED(Locks::mutator_lock_) { \
     83   return artAllocObjectFromCode<true, false, instrumented_bool, allocator_type>(klass, self); \
     84 } \
     85 extern "C" mirror::Array* artAllocArrayFromCodeResolved##suffix##suffix2( \
     86     mirror::Class* klass, int32_t component_count, Thread* self) \
     87     REQUIRES_SHARED(Locks::mutator_lock_) { \
     88   ScopedQuickEntrypointChecks sqec(self); \
     89   return AllocArrayFromCodeResolved<instrumented_bool>(klass, component_count, self, \
     90                                                        allocator_type); \
     91 } \
     92 extern "C" mirror::String* artAllocStringFromBytesFromCode##suffix##suffix2( \
     93     mirror::ByteArray* byte_array, int32_t high, int32_t offset, int32_t byte_count, \
     94     Thread* self) \
     95     REQUIRES_SHARED(Locks::mutator_lock_) { \
     96   ScopedQuickEntrypointChecks sqec(self); \
     97   StackHandleScope<1> hs(self); \
     98   Handle<mirror::ByteArray> handle_array(hs.NewHandle(byte_array)); \
     99   return mirror::String::AllocFromByteArray<instrumented_bool>(self, byte_count, handle_array, \
    100                                                                offset, high, allocator_type); \
    101 } \
    102 extern "C" mirror::String* artAllocStringFromCharsFromCode##suffix##suffix2( \
    103     int32_t offset, int32_t char_count, mirror::CharArray* char_array, Thread* self) \
    104     REQUIRES_SHARED(Locks::mutator_lock_) { \
    105   StackHandleScope<1> hs(self); \
    106   Handle<mirror::CharArray> handle_array(hs.NewHandle(char_array)); \
    107   return mirror::String::AllocFromCharArray<instrumented_bool>(self, char_count, handle_array, \
    108                                                                offset, allocator_type); \
    109 } \
    110 extern "C" mirror::String* artAllocStringFromStringFromCode##suffix##suffix2( /* NOLINT */ \
    111     mirror::String* string, Thread* self) \
    112     REQUIRES_SHARED(Locks::mutator_lock_) { \
    113   StackHandleScope<1> hs(self); \
    114   Handle<mirror::String> handle_string(hs.NewHandle(string)); \
    115   return mirror::String::AllocFromString<instrumented_bool>(self, handle_string->GetLength(), \
    116                                                             handle_string, 0, allocator_type); \
    117 }
    118 
    119 #define GENERATE_ENTRYPOINTS_FOR_ALLOCATOR(suffix, allocator_type) \
    120     GENERATE_ENTRYPOINTS_FOR_ALLOCATOR_INST(suffix, Instrumented, true, allocator_type) \
    121     GENERATE_ENTRYPOINTS_FOR_ALLOCATOR_INST(suffix, , false, allocator_type)
    122 
    123 GENERATE_ENTRYPOINTS_FOR_ALLOCATOR(DlMalloc, gc::kAllocatorTypeDlMalloc)
    124 GENERATE_ENTRYPOINTS_FOR_ALLOCATOR(RosAlloc, gc::kAllocatorTypeRosAlloc)
    125 GENERATE_ENTRYPOINTS_FOR_ALLOCATOR(BumpPointer, gc::kAllocatorTypeBumpPointer)
    126 GENERATE_ENTRYPOINTS_FOR_ALLOCATOR(TLAB, gc::kAllocatorTypeTLAB)
    127 GENERATE_ENTRYPOINTS_FOR_ALLOCATOR(Region, gc::kAllocatorTypeRegion)
    128 GENERATE_ENTRYPOINTS_FOR_ALLOCATOR(RegionTLAB, gc::kAllocatorTypeRegionTLAB)
    129 
    130 #define GENERATE_ENTRYPOINTS(suffix) \
    131 extern "C" void* art_quick_alloc_array_resolved##suffix(mirror::Class* klass, int32_t); \
    132 extern "C" void* art_quick_alloc_array_resolved8##suffix(mirror::Class* klass, int32_t); \
    133 extern "C" void* art_quick_alloc_array_resolved16##suffix(mirror::Class* klass, int32_t); \
    134 extern "C" void* art_quick_alloc_array_resolved32##suffix(mirror::Class* klass, int32_t); \
    135 extern "C" void* art_quick_alloc_array_resolved64##suffix(mirror::Class* klass, int32_t); \
    136 extern "C" void* art_quick_alloc_object_resolved##suffix(mirror::Class* klass); \
    137 extern "C" void* art_quick_alloc_object_initialized##suffix(mirror::Class* klass); \
    138 extern "C" void* art_quick_alloc_object_with_checks##suffix(mirror::Class* klass); \
    139 extern "C" void* art_quick_alloc_string_from_bytes##suffix(void*, int32_t, int32_t, int32_t); \
    140 extern "C" void* art_quick_alloc_string_from_chars##suffix(int32_t, int32_t, void*); \
    141 extern "C" void* art_quick_alloc_string_from_string##suffix(void*); \
    142 extern "C" void* art_quick_alloc_array_resolved##suffix##_instrumented(mirror::Class* klass, int32_t); \
    143 extern "C" void* art_quick_alloc_array_resolved8##suffix##_instrumented(mirror::Class* klass, int32_t); \
    144 extern "C" void* art_quick_alloc_array_resolved16##suffix##_instrumented(mirror::Class* klass, int32_t); \
    145 extern "C" void* art_quick_alloc_array_resolved32##suffix##_instrumented(mirror::Class* klass, int32_t); \
    146 extern "C" void* art_quick_alloc_array_resolved64##suffix##_instrumented(mirror::Class* klass, int32_t); \
    147 extern "C" void* art_quick_alloc_object_resolved##suffix##_instrumented(mirror::Class* klass); \
    148 extern "C" void* art_quick_alloc_object_initialized##suffix##_instrumented(mirror::Class* klass); \
    149 extern "C" void* art_quick_alloc_object_with_checks##suffix##_instrumented(mirror::Class* klass); \
    150 extern "C" void* art_quick_alloc_string_from_bytes##suffix##_instrumented(void*, int32_t, int32_t, int32_t); \
    151 extern "C" void* art_quick_alloc_string_from_chars##suffix##_instrumented(int32_t, int32_t, void*); \
    152 extern "C" void* art_quick_alloc_string_from_string##suffix##_instrumented(void*); \
    153 void SetQuickAllocEntryPoints##suffix(QuickEntryPoints* qpoints, bool instrumented) { \
    154   if (instrumented) { \
    155     qpoints->pAllocArrayResolved = art_quick_alloc_array_resolved##suffix##_instrumented; \
    156     qpoints->pAllocArrayResolved8 = art_quick_alloc_array_resolved8##suffix##_instrumented; \
    157     qpoints->pAllocArrayResolved16 = art_quick_alloc_array_resolved16##suffix##_instrumented; \
    158     qpoints->pAllocArrayResolved32 = art_quick_alloc_array_resolved32##suffix##_instrumented; \
    159     qpoints->pAllocArrayResolved64 = art_quick_alloc_array_resolved64##suffix##_instrumented; \
    160     qpoints->pAllocObjectResolved = art_quick_alloc_object_resolved##suffix##_instrumented; \
    161     qpoints->pAllocObjectInitialized = art_quick_alloc_object_initialized##suffix##_instrumented; \
    162     qpoints->pAllocObjectWithChecks = art_quick_alloc_object_with_checks##suffix##_instrumented; \
    163     qpoints->pAllocStringFromBytes = art_quick_alloc_string_from_bytes##suffix##_instrumented; \
    164     qpoints->pAllocStringFromChars = art_quick_alloc_string_from_chars##suffix##_instrumented; \
    165     qpoints->pAllocStringFromString = art_quick_alloc_string_from_string##suffix##_instrumented; \
    166   } else { \
    167     qpoints->pAllocArrayResolved = art_quick_alloc_array_resolved##suffix; \
    168     qpoints->pAllocArrayResolved8 = art_quick_alloc_array_resolved8##suffix; \
    169     qpoints->pAllocArrayResolved16 = art_quick_alloc_array_resolved16##suffix; \
    170     qpoints->pAllocArrayResolved32 = art_quick_alloc_array_resolved32##suffix; \
    171     qpoints->pAllocArrayResolved64 = art_quick_alloc_array_resolved64##suffix; \
    172     qpoints->pAllocObjectResolved = art_quick_alloc_object_resolved##suffix; \
    173     qpoints->pAllocObjectInitialized = art_quick_alloc_object_initialized##suffix; \
    174     qpoints->pAllocObjectWithChecks = art_quick_alloc_object_with_checks##suffix; \
    175     qpoints->pAllocStringFromBytes = art_quick_alloc_string_from_bytes##suffix; \
    176     qpoints->pAllocStringFromChars = art_quick_alloc_string_from_chars##suffix; \
    177     qpoints->pAllocStringFromString = art_quick_alloc_string_from_string##suffix; \
    178   } \
    179 }
    180 
    181 // Generate the entrypoint functions.
    182 #if !defined(__APPLE__) || !defined(__LP64__)
    183 GENERATE_ENTRYPOINTS(_dlmalloc)
    184 GENERATE_ENTRYPOINTS(_rosalloc)
    185 GENERATE_ENTRYPOINTS(_bump_pointer)
    186 GENERATE_ENTRYPOINTS(_tlab)
    187 GENERATE_ENTRYPOINTS(_region)
    188 GENERATE_ENTRYPOINTS(_region_tlab)
    189 #endif
    190 
    191 static bool entry_points_instrumented = false;
    192 static gc::AllocatorType entry_points_allocator = gc::kAllocatorTypeDlMalloc;
    193 
    194 void SetQuickAllocEntryPointsAllocator(gc::AllocatorType allocator) {
    195   entry_points_allocator = allocator;
    196 }
    197 
    198 void SetQuickAllocEntryPointsInstrumented(bool instrumented) {
    199   entry_points_instrumented = instrumented;
    200 }
    201 
    202 void ResetQuickAllocEntryPoints(QuickEntryPoints* qpoints, bool is_marking) {
    203 #if !defined(__APPLE__) || !defined(__LP64__)
    204   switch (entry_points_allocator) {
    205     case gc::kAllocatorTypeDlMalloc: {
    206       SetQuickAllocEntryPoints_dlmalloc(qpoints, entry_points_instrumented);
    207       return;
    208     }
    209     case gc::kAllocatorTypeRosAlloc: {
    210       SetQuickAllocEntryPoints_rosalloc(qpoints, entry_points_instrumented);
    211       return;
    212     }
    213     case gc::kAllocatorTypeBumpPointer: {
    214       CHECK(kMovingCollector);
    215       SetQuickAllocEntryPoints_bump_pointer(qpoints, entry_points_instrumented);
    216       return;
    217     }
    218     case gc::kAllocatorTypeTLAB: {
    219       CHECK(kMovingCollector);
    220       SetQuickAllocEntryPoints_tlab(qpoints, entry_points_instrumented);
    221       return;
    222     }
    223     case gc::kAllocatorTypeRegion: {
    224       CHECK(kMovingCollector);
    225       SetQuickAllocEntryPoints_region(qpoints, entry_points_instrumented);
    226       return;
    227     }
    228     case gc::kAllocatorTypeRegionTLAB: {
    229       CHECK(kMovingCollector);
    230       if (is_marking) {
    231         SetQuickAllocEntryPoints_region_tlab(qpoints, entry_points_instrumented);
    232       } else {
    233         // Not marking means we need no read barriers and can just use the normal TLAB case.
    234         SetQuickAllocEntryPoints_tlab(qpoints, entry_points_instrumented);
    235       }
    236       return;
    237     }
    238     default:
    239       break;
    240   }
    241 #else
    242   UNUSED(qpoints);
    243   UNUSED(is_marking);
    244 #endif
    245   UNIMPLEMENTED(FATAL);
    246   UNREACHABLE();
    247 }
    248 
    249 }  // namespace art
    250