Revert "Revert "JIT root tables.""
Also contains Revert "Support kJitTableAddress in x86/arm/arm64."
This reverts commit 4acd03638fcdb4e5d1666f8eec7eb3bf6d6be035.
This reverts commit 997d1217830c0a18b70faeabd53c04700a87d7d9.
Test: ART_USE_READ_BARRIER=true/false test-art-host test-art-target
Change-Id: I77cb1e9bf8f1b4c58b72d3cf5ca31ced2aaa1ea3
diff --git a/compiler/optimizing/code_generator.cc b/compiler/optimizing/code_generator.cc
index 8b450e1..a5f248d 100644
--- a/compiler/optimizing/code_generator.cc
+++ b/compiler/optimizing/code_generator.cc
@@ -1375,4 +1375,30 @@
return klass->GetDisableIntrinsicFlagOffset().Uint32Value();
}
+void CodeGenerator::EmitJitRoots(uint8_t* code,
+ Handle<mirror::ObjectArray<mirror::Object>> roots,
+ const uint8_t* roots_data,
+ Handle<mirror::DexCache> outer_dex_cache) {
+ DCHECK_EQ(static_cast<size_t>(roots->GetLength()), GetNumberOfJitRoots());
+ StackHandleScope<1> hs(Thread::Current());
+ MutableHandle<mirror::DexCache> h_dex_cache(hs.NewHandle<mirror::DexCache>(nullptr));
+ ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
+ size_t index = 0;
+ for (auto& entry : jit_string_roots_) {
+ const DexFile& entry_dex_file = *entry.first.dex_file;
+ // Avoid the expensive FindDexCache call by checking if the string is
+ // in the compiled method's dex file.
+ h_dex_cache.Assign(IsSameDexFile(*outer_dex_cache->GetDexFile(), entry_dex_file)
+ ? outer_dex_cache.Get()
+ : class_linker->FindDexCache(hs.Self(), entry_dex_file));
+ mirror::String* string = class_linker->LookupString(
+ entry_dex_file, entry.first.string_index, h_dex_cache);
+ DCHECK(string != nullptr) << "JIT roots require strings to have been loaded";
+ roots->Set(index, string);
+ entry.second = index;
+ ++index;
+ }
+ EmitJitRootPatches(code, roots_data);
+}
+
} // namespace art
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index bf246ad..a5d19ab 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -32,6 +32,7 @@
#include "optimizing_compiler_stats.h"
#include "read_barrier_option.h"
#include "stack_map_stream.h"
+#include "string_reference.h"
#include "utils/label.h"
namespace art {
@@ -335,6 +336,17 @@
void BuildStackMaps(MemoryRegion region, const DexFile::CodeItem& code_item);
size_t ComputeStackMapsSize();
+ size_t GetNumberOfJitRoots() const {
+ return jit_string_roots_.size();
+ }
+
+ // Fills the `literals` array with literals collected during code generation.
+ // Also emits literal patches.
+ void EmitJitRoots(uint8_t* code,
+ Handle<mirror::ObjectArray<mirror::Object>> roots,
+ const uint8_t* roots_data,
+ Handle<mirror::DexCache> outer_dex_cache)
+ REQUIRES_SHARED(Locks::mutator_lock_);
bool IsLeafMethod() const {
return is_leaf_;
@@ -515,6 +527,26 @@
virtual HLoadClass::LoadKind GetSupportedLoadClassKind(
HLoadClass::LoadKind desired_class_load_kind) = 0;
+ static LocationSummary::CallKind GetLoadStringCallKind(HLoadString* load) {
+ switch (load->GetLoadKind()) {
+ case HLoadString::LoadKind::kBssEntry:
+ DCHECK(load->NeedsEnvironment());
+ return LocationSummary::kCallOnSlowPath;
+ case HLoadString::LoadKind::kDexCacheViaMethod:
+ DCHECK(load->NeedsEnvironment());
+ return LocationSummary::kCallOnMainOnly;
+ case HLoadString::LoadKind::kJitTableAddress:
+ DCHECK(!load->NeedsEnvironment());
+ return kEmitCompilerReadBarrier
+ ? LocationSummary::kCallOnSlowPath
+ : LocationSummary::kNoCall;
+ break;
+ default:
+ DCHECK(!load->NeedsEnvironment());
+ return LocationSummary::kNoCall;
+ }
+ }
+
// Check if the desired_dispatch_info is supported. If it is, return it,
// otherwise return a fall-back info that should be used instead.
virtual HInvokeStaticOrDirect::DispatchInfo GetSupportedInvokeStaticOrDirectDispatch(
@@ -571,6 +603,8 @@
fpu_callee_save_mask_(fpu_callee_save_mask),
stack_map_stream_(graph->GetArena()),
block_order_(nullptr),
+ jit_string_roots_(StringReferenceValueComparator(),
+ graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
disasm_info_(nullptr),
stats_(stats),
graph_(graph),
@@ -637,6 +671,12 @@
return current_slow_path_;
}
+ // Emit the patches assocatied with JIT roots. Only applies to JIT compiled code.
+ virtual void EmitJitRootPatches(uint8_t* code ATTRIBUTE_UNUSED,
+ const uint8_t* roots_data ATTRIBUTE_UNUSED) {
+ DCHECK_EQ(jit_string_roots_.size(), 0u);
+ }
+
// Frame size required for this method.
uint32_t frame_size_;
uint32_t core_spill_mask_;
@@ -662,6 +702,11 @@
// The order to use for code generation.
const ArenaVector<HBasicBlock*>* block_order_;
+ // Maps a StringReference (dex_file, string_index) to the index in the literal table.
+ // Entries are intially added with a 0 index, and `EmitJitRoots` will compute all the
+ // indices.
+ ArenaSafeMap<StringReference, size_t, StringReferenceValueComparator> jit_string_roots_;
+
DisassemblyInformation* disasm_info_;
private:
diff --git a/compiler/optimizing/code_generator_arm.cc b/compiler/optimizing/code_generator_arm.cc
index 7c72d00..035c02e 100644
--- a/compiler/optimizing/code_generator_arm.cc
+++ b/compiler/optimizing/code_generator_arm.cc
@@ -1222,7 +1222,9 @@
graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
pc_relative_type_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
boot_image_address_patches_(std::less<uint32_t>(),
- graph->GetArena()->Adapter(kArenaAllocCodeGenerator)) {
+ graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
+ jit_string_patches_(StringReferenceValueComparator(),
+ graph->GetArena()->Adapter(kArenaAllocCodeGenerator)) {
// Always save the LR register to mimic Quick.
AddAllocatedRegister(Location::RegisterLocation(LR));
}
@@ -5901,6 +5903,9 @@
case HLoadString::LoadKind::kBssEntry:
DCHECK(!Runtime::Current()->UseJitCompilation());
break;
+ case HLoadString::LoadKind::kJitTableAddress:
+ DCHECK(Runtime::Current()->UseJitCompilation());
+ break;
case HLoadString::LoadKind::kDexCacheViaMethod:
break;
}
@@ -5908,13 +5913,8 @@
}
void LocationsBuilderARM::VisitLoadString(HLoadString* load) {
- LocationSummary::CallKind call_kind = load->NeedsEnvironment()
- ? ((load->GetLoadKind() == HLoadString::LoadKind::kDexCacheViaMethod)
- ? LocationSummary::kCallOnMainOnly
- : LocationSummary::kCallOnSlowPath)
- : LocationSummary::kNoCall;
+ LocationSummary::CallKind call_kind = CodeGenerator::GetLoadStringCallKind(load);
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(load, call_kind);
-
HLoadString::LoadKind load_kind = load->GetLoadKind();
if (load_kind == HLoadString::LoadKind::kDexCacheViaMethod) {
locations->SetOut(Location::RegisterLocation(R0));
@@ -5987,6 +5987,13 @@
__ Bind(slow_path->GetExitLabel());
return;
}
+ case HLoadString::LoadKind::kJitTableAddress: {
+ __ LoadLiteral(out, codegen_->DeduplicateJitStringLiteral(load->GetDexFile(),
+ load->GetStringIndex()));
+ // /* GcRoot<mirror::String> */ out = *out
+ GenerateGcRootFieldLoad(load, out_loc, out, /* offset */ 0, kCompilerReadBarrierOption);
+ return;
+ }
default:
break;
}
@@ -7343,6 +7350,14 @@
return DeduplicateUint32Literal(address, &uint32_literals_);
}
+Literal* CodeGeneratorARM::DeduplicateJitStringLiteral(const DexFile& dex_file,
+ uint32_t string_index) {
+ jit_string_roots_.Overwrite(StringReference(&dex_file, string_index), /* placeholder */ 0u);
+ return jit_string_patches_.GetOrCreate(
+ StringReference(&dex_file, string_index),
+ [this]() { return __ NewLiteral<uint32_t>(/* placeholder */ 0u); });
+}
+
template <LinkerPatch (*Factory)(size_t, const DexFile*, uint32_t, uint32_t)>
inline void CodeGeneratorARM::EmitPcRelativeLinkerPatches(
const ArenaDeque<PcRelativePatchInfo>& infos,
@@ -7659,6 +7674,21 @@
}
}
+void CodeGeneratorARM::EmitJitRootPatches(uint8_t* code, const uint8_t* roots_data) {
+ for (const auto& entry : jit_string_patches_) {
+ const auto& it = jit_string_roots_.find(entry.first);
+ DCHECK(it != jit_string_roots_.end());
+ size_t index_in_table = it->second;
+ Literal* literal = entry.second;
+ DCHECK(literal->GetLabel()->IsBound());
+ uint32_t literal_offset = literal->GetLabel()->Position();
+ uintptr_t address =
+ reinterpret_cast<uintptr_t>(roots_data) + index_in_table * sizeof(GcRoot<mirror::Object>);
+ uint8_t* data = code + literal_offset;
+ reinterpret_cast<uint32_t*>(data)[0] = dchecked_integral_cast<uint32_t>(address);
+ }
+}
+
#undef __
#undef QUICK_ENTRY_POINT
diff --git a/compiler/optimizing/code_generator_arm.h b/compiler/optimizing/code_generator_arm.h
index f95dd57..8ace3da 100644
--- a/compiler/optimizing/code_generator_arm.h
+++ b/compiler/optimizing/code_generator_arm.h
@@ -488,9 +488,12 @@
Literal* DeduplicateBootImageTypeLiteral(const DexFile& dex_file, uint32_t type_index);
Literal* DeduplicateBootImageAddressLiteral(uint32_t address);
Literal* DeduplicateDexCacheAddressLiteral(uint32_t address);
+ Literal* DeduplicateJitStringLiteral(const DexFile& dex_file, uint32_t string_index);
void EmitLinkerPatches(ArenaVector<LinkerPatch>* linker_patches) OVERRIDE;
+ void EmitJitRootPatches(uint8_t* code, const uint8_t* roots_data) OVERRIDE;
+
// Fast path implementation of ReadBarrier::Barrier for a heap
// reference field load when Baker's read barriers are used.
void GenerateFieldLoadWithBakerReadBarrier(HInstruction* instruction,
@@ -591,9 +594,9 @@
using Uint32ToLiteralMap = ArenaSafeMap<uint32_t, Literal*>;
using MethodToLiteralMap = ArenaSafeMap<MethodReference, Literal*, MethodReferenceComparator>;
- using BootStringToLiteralMap = ArenaSafeMap<StringReference,
- Literal*,
- StringReferenceValueComparator>;
+ using StringToLiteralMap = ArenaSafeMap<StringReference,
+ Literal*,
+ StringReferenceValueComparator>;
using BootTypeToLiteralMap = ArenaSafeMap<TypeReference,
Literal*,
TypeReferenceValueComparator>;
@@ -605,7 +608,6 @@
PcRelativePatchInfo* NewPcRelativePatch(const DexFile& dex_file,
uint32_t offset_or_index,
ArenaDeque<PcRelativePatchInfo>* patches);
-
template <LinkerPatch (*Factory)(size_t, const DexFile*, uint32_t, uint32_t)>
static void EmitPcRelativeLinkerPatches(const ArenaDeque<PcRelativePatchInfo>& infos,
ArenaVector<LinkerPatch>* linker_patches);
@@ -630,7 +632,7 @@
// PC-relative patch info for each HArmDexCacheArraysBase.
ArenaDeque<PcRelativePatchInfo> pc_relative_dex_cache_patches_;
// Deduplication map for boot string literals for kBootImageLinkTimeAddress.
- BootStringToLiteralMap boot_image_string_patches_;
+ StringToLiteralMap boot_image_string_patches_;
// PC-relative String patch info; type depends on configuration (app .bss or boot image PIC).
ArenaDeque<PcRelativePatchInfo> pc_relative_string_patches_;
// Deduplication map for boot type literals for kBootImageLinkTimeAddress.
@@ -640,6 +642,9 @@
// Deduplication map for patchable boot image addresses.
Uint32ToLiteralMap boot_image_address_patches_;
+ // Patches for string literals in JIT compiled code.
+ StringToLiteralMap jit_string_patches_;
+
DISALLOW_COPY_AND_ASSIGN(CodeGeneratorARM);
};
diff --git a/compiler/optimizing/code_generator_arm64.cc b/compiler/optimizing/code_generator_arm64.cc
index 35b1605..ea57990 100644
--- a/compiler/optimizing/code_generator_arm64.cc
+++ b/compiler/optimizing/code_generator_arm64.cc
@@ -1166,7 +1166,9 @@
graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
pc_relative_type_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
boot_image_address_patches_(std::less<uint32_t>(),
- graph->GetArena()->Adapter(kArenaAllocCodeGenerator)) {
+ graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
+ jit_string_patches_(StringReferenceValueComparator(),
+ graph->GetArena()->Adapter(kArenaAllocCodeGenerator)) {
// Save the link register (containing the return address) to mimic Quick.
AddAllocatedRegister(LocationFrom(lr));
}
@@ -4138,6 +4140,14 @@
return DeduplicateUint64Literal(address);
}
+vixl::aarch64::Literal<uint32_t>* CodeGeneratorARM64::DeduplicateJitStringLiteral(
+ const DexFile& dex_file, uint32_t string_index) {
+ jit_string_roots_.Overwrite(StringReference(&dex_file, string_index), /* placeholder */ 0u);
+ return jit_string_patches_.GetOrCreate(
+ StringReference(&dex_file, string_index),
+ [this]() { return __ CreateLiteralDestroyedWithPool<uint32_t>(/* placeholder */ 0u); });
+}
+
void CodeGeneratorARM64::EmitAdrpPlaceholder(vixl::aarch64::Label* fixup_label,
vixl::aarch64::Register reg) {
DCHECK(reg.IsX());
@@ -4523,16 +4533,15 @@
break;
case HLoadString::LoadKind::kDexCacheViaMethod:
break;
+ case HLoadString::LoadKind::kJitTableAddress:
+ DCHECK(Runtime::Current()->UseJitCompilation());
+ break;
}
return desired_string_load_kind;
}
void LocationsBuilderARM64::VisitLoadString(HLoadString* load) {
- LocationSummary::CallKind call_kind = load->NeedsEnvironment()
- ? ((load->GetLoadKind() == HLoadString::LoadKind::kDexCacheViaMethod)
- ? LocationSummary::kCallOnMainOnly
- : LocationSummary::kCallOnSlowPath)
- : LocationSummary::kNoCall;
+ LocationSummary::CallKind call_kind = CodeGenerator::GetLoadStringCallKind(load);
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(load, call_kind);
if (load->GetLoadKind() == HLoadString::LoadKind::kDexCacheViaMethod) {
InvokeRuntimeCallingConvention calling_convention;
@@ -4558,6 +4567,7 @@
void InstructionCodeGeneratorARM64::VisitLoadString(HLoadString* load) {
Register out = OutputRegister(load);
+ Location out_loc = load->GetLocations()->Out();
switch (load->GetLoadKind()) {
case HLoadString::LoadKind::kBootImageLinkTimeAddress:
@@ -4594,9 +4604,9 @@
// Add LDR with its PC-relative String patch.
vixl::aarch64::Label* ldr_label =
codegen_->NewPcRelativeStringPatch(dex_file, string_index, adrp_label);
- // /* GcRoot<mirror::Class> */ out = *(base_address + offset) /* PC-relative */
+ // /* GcRoot<mirror::String> */ out = *(base_address + offset) /* PC-relative */
GenerateGcRootFieldLoad(load,
- load->GetLocations()->Out(),
+ out_loc,
temp,
/* offset placeholder */ 0u,
ldr_label,
@@ -4608,6 +4618,17 @@
__ Bind(slow_path->GetExitLabel());
return;
}
+ case HLoadString::LoadKind::kJitTableAddress: {
+ __ Ldr(out, codegen_->DeduplicateJitStringLiteral(load->GetDexFile(),
+ load->GetStringIndex()));
+ GenerateGcRootFieldLoad(load,
+ out_loc,
+ out.X(),
+ /* offset */ 0,
+ /* fixup_label */ nullptr,
+ kCompilerReadBarrierOption);
+ return;
+ }
default:
break;
}
@@ -5727,7 +5748,19 @@
}
}
-
+void CodeGeneratorARM64::EmitJitRootPatches(uint8_t* code, const uint8_t* roots_data) {
+ for (const auto& entry : jit_string_patches_) {
+ const auto& it = jit_string_roots_.find(entry.first);
+ DCHECK(it != jit_string_roots_.end());
+ size_t index_in_table = it->second;
+ vixl::aarch64::Literal<uint32_t>* literal = entry.second;
+ uint32_t literal_offset = literal->GetOffset();
+ uintptr_t address =
+ reinterpret_cast<uintptr_t>(roots_data) + index_in_table * sizeof(GcRoot<mirror::Object>);
+ uint8_t* data = code + literal_offset;
+ reinterpret_cast<uint32_t*>(data)[0] = dchecked_integral_cast<uint32_t>(address);
+ }
+}
#undef __
#undef QUICK_ENTRY_POINT
diff --git a/compiler/optimizing/code_generator_arm64.h b/compiler/optimizing/code_generator_arm64.h
index 0e8d4fd..a2ab607 100644
--- a/compiler/optimizing/code_generator_arm64.h
+++ b/compiler/optimizing/code_generator_arm64.h
@@ -565,6 +565,8 @@
uint32_t type_index);
vixl::aarch64::Literal<uint32_t>* DeduplicateBootImageAddressLiteral(uint64_t address);
vixl::aarch64::Literal<uint64_t>* DeduplicateDexCacheAddressLiteral(uint64_t address);
+ vixl::aarch64::Literal<uint32_t>* DeduplicateJitStringLiteral(const DexFile& dex_file,
+ uint32_t string_index);
void EmitAdrpPlaceholder(vixl::aarch64::Label* fixup_label, vixl::aarch64::Register reg);
void EmitAddPlaceholder(vixl::aarch64::Label* fixup_label,
@@ -576,6 +578,8 @@
void EmitLinkerPatches(ArenaVector<LinkerPatch>* linker_patches) OVERRIDE;
+ void EmitJitRootPatches(uint8_t* code, const uint8_t* roots_data) OVERRIDE;
+
// Fast path implementation of ReadBarrier::Barrier for a heap
// reference field load when Baker's read barriers are used.
void GenerateFieldLoadWithBakerReadBarrier(HInstruction* instruction,
@@ -673,9 +677,9 @@
using MethodToLiteralMap = ArenaSafeMap<MethodReference,
vixl::aarch64::Literal<uint64_t>*,
MethodReferenceComparator>;
- using BootStringToLiteralMap = ArenaSafeMap<StringReference,
- vixl::aarch64::Literal<uint32_t>*,
- StringReferenceValueComparator>;
+ using StringToLiteralMap = ArenaSafeMap<StringReference,
+ vixl::aarch64::Literal<uint32_t>*,
+ StringReferenceValueComparator>;
using BootTypeToLiteralMap = ArenaSafeMap<TypeReference,
vixl::aarch64::Literal<uint32_t>*,
TypeReferenceValueComparator>;
@@ -739,7 +743,7 @@
// PC-relative DexCache access info.
ArenaDeque<PcRelativePatchInfo> pc_relative_dex_cache_patches_;
// Deduplication map for boot string literals for kBootImageLinkTimeAddress.
- BootStringToLiteralMap boot_image_string_patches_;
+ StringToLiteralMap boot_image_string_patches_;
// PC-relative String patch info; type depends on configuration (app .bss or boot image PIC).
ArenaDeque<PcRelativePatchInfo> pc_relative_string_patches_;
// Deduplication map for boot type literals for kBootImageLinkTimeAddress.
@@ -749,6 +753,9 @@
// Deduplication map for patchable boot image addresses.
Uint32ToLiteralMap boot_image_address_patches_;
+ // Patches for string literals in JIT compiled code.
+ StringToLiteralMap jit_string_patches_;
+
DISALLOW_COPY_AND_ASSIGN(CodeGeneratorARM64);
};
diff --git a/compiler/optimizing/code_generator_mips.cc b/compiler/optimizing/code_generator_mips.cc
index f169eb0..0936ac0 100644
--- a/compiler/optimizing/code_generator_mips.cc
+++ b/compiler/optimizing/code_generator_mips.cc
@@ -5215,6 +5215,11 @@
case HLoadString::LoadKind::kDexCacheViaMethod:
fallback_load = false;
break;
+ case HLoadString::LoadKind::kJitTableAddress:
+ DCHECK(Runtime::Current()->UseJitCompilation());
+ // TODO: implement.
+ fallback_load = true;
+ break;
}
if (fallback_load) {
desired_string_load_kind = HLoadString::LoadKind::kDexCacheViaMethod;
diff --git a/compiler/optimizing/code_generator_x86.cc b/compiler/optimizing/code_generator_x86.cc
index 2a9e21d..c7addce 100644
--- a/compiler/optimizing/code_generator_x86.cc
+++ b/compiler/optimizing/code_generator_x86.cc
@@ -1020,6 +1020,7 @@
simple_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
string_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
type_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
+ jit_string_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
constant_area_start_(-1),
fixups_to_jump_tables_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
method_address_offset_(-1) {
@@ -6226,16 +6227,15 @@
break;
case HLoadString::LoadKind::kDexCacheViaMethod:
break;
+ case HLoadString::LoadKind::kJitTableAddress:
+ DCHECK(Runtime::Current()->UseJitCompilation());
+ break;
}
return desired_string_load_kind;
}
void LocationsBuilderX86::VisitLoadString(HLoadString* load) {
- LocationSummary::CallKind call_kind = (load->NeedsEnvironment() || kEmitCompilerReadBarrier)
- ? ((load->GetLoadKind() == HLoadString::LoadKind::kDexCacheViaMethod)
- ? LocationSummary::kCallOnMainOnly
- : LocationSummary::kCallOnSlowPath)
- : LocationSummary::kNoCall;
+ LocationSummary::CallKind call_kind = CodeGenerator::GetLoadStringCallKind(load);
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(load, call_kind);
HLoadString::LoadKind load_kind = load->GetLoadKind();
if (load_kind == HLoadString::LoadKind::kBootImageLinkTimePcRelative ||
@@ -6260,6 +6260,14 @@
}
}
+Label* CodeGeneratorX86::NewJitRootStringPatch(const DexFile& dex_file, uint32_t dex_index) {
+ jit_string_roots_.Overwrite(StringReference(&dex_file, dex_index), /* placeholder */ 0u);
+ // Add a patch entry and return the label.
+ jit_string_patches_.emplace_back(dex_file, dex_index);
+ PatchInfo<Label>* info = &jit_string_patches_.back();
+ return &info->label;
+}
+
void InstructionCodeGeneratorX86::VisitLoadString(HLoadString* load) {
LocationSummary* locations = load->GetLocations();
Location out_loc = locations->Out();
@@ -6288,7 +6296,7 @@
Register method_address = locations->InAt(0).AsRegister<Register>();
Address address = Address(method_address, CodeGeneratorX86::kDummy32BitOffset);
Label* fixup_label = codegen_->NewStringBssEntryPatch(load);
- // /* GcRoot<mirror::Class> */ out = *address /* PC-relative */
+ // /* GcRoot<mirror::String> */ out = *address /* PC-relative */
GenerateGcRootFieldLoad(load, out_loc, address, fixup_label, kCompilerReadBarrierOption);
SlowPathCode* slow_path = new (GetGraph()->GetArena()) LoadStringSlowPathX86(load);
codegen_->AddSlowPath(slow_path);
@@ -6297,6 +6305,14 @@
__ Bind(slow_path->GetExitLabel());
return;
}
+ case HLoadString::LoadKind::kJitTableAddress: {
+ Address address = Address::Absolute(CodeGeneratorX86::kDummy32BitOffset);
+ Label* fixup_label = codegen_->NewJitRootStringPatch(
+ load->GetDexFile(), load->GetStringIndex());
+ // /* GcRoot<mirror::String> */ out = *address
+ GenerateGcRootFieldLoad(load, out_loc, address, fixup_label, kCompilerReadBarrierOption);
+ return;
+ }
default:
break;
}
@@ -7722,6 +7738,20 @@
}
}
+void CodeGeneratorX86::EmitJitRootPatches(uint8_t* code, const uint8_t* roots_data) {
+ for (const PatchInfo<Label>& info : jit_string_patches_) {
+ const auto& it = jit_string_roots_.find(StringReference(&info.dex_file, info.index));
+ DCHECK(it != jit_string_roots_.end());
+ size_t index_in_table = it->second;
+ uint32_t code_offset = info.label.Position() - kLabelPositionToLiteralOffsetAdjustment;
+ uintptr_t address =
+ reinterpret_cast<uintptr_t>(roots_data) + index_in_table * sizeof(GcRoot<mirror::Object>);
+ typedef __attribute__((__aligned__(1))) uint32_t unaligned_uint32_t;
+ reinterpret_cast<unaligned_uint32_t*>(code + code_offset)[0] =
+ dchecked_integral_cast<uint32_t>(address);
+ }
+}
+
#undef __
} // namespace x86
diff --git a/compiler/optimizing/code_generator_x86.h b/compiler/optimizing/code_generator_x86.h
index 164231b..16ea6b5 100644
--- a/compiler/optimizing/code_generator_x86.h
+++ b/compiler/optimizing/code_generator_x86.h
@@ -414,12 +414,15 @@
void RecordTypePatch(HLoadClass* load_class);
Label* NewStringBssEntryPatch(HLoadString* load_string);
Label* NewPcRelativeDexCacheArrayPatch(const DexFile& dex_file, uint32_t element_offset);
+ Label* NewJitRootStringPatch(const DexFile& dex_file, uint32_t dex_index);
void MoveFromReturnRegister(Location trg, Primitive::Type type) OVERRIDE;
// Emit linker patches.
void EmitLinkerPatches(ArenaVector<LinkerPatch>* linker_patches) OVERRIDE;
+ void EmitJitRootPatches(uint8_t* code, const uint8_t* roots_data) OVERRIDE;
+
// Emit a write barrier.
void MarkGCCard(Register temp,
Register card,
@@ -616,6 +619,9 @@
// Type patch locations.
ArenaDeque<PatchInfo<Label>> type_patches_;
+ // Patches for string root accesses in JIT compiled code.
+ ArenaDeque<PatchInfo<Label>> jit_string_patches_;
+
// Offset to the start of the constant area in the assembled code.
// Used for fixups to the constant area.
int32_t constant_area_start_;
diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index cb89e50..7be887f 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -1266,7 +1266,8 @@
simple_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
string_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
type_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
- fixups_to_jump_tables_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)) {
+ fixups_to_jump_tables_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)),
+ jit_string_patches_(graph->GetArena()->Adapter(kArenaAllocCodeGenerator)) {
AddAllocatedRegister(Location::RegisterLocation(kFakeReturnRegister));
}
@@ -5638,16 +5639,15 @@
break;
case HLoadString::LoadKind::kDexCacheViaMethod:
break;
+ case HLoadString::LoadKind::kJitTableAddress:
+ DCHECK(Runtime::Current()->UseJitCompilation());
+ break;
}
return desired_string_load_kind;
}
void LocationsBuilderX86_64::VisitLoadString(HLoadString* load) {
- LocationSummary::CallKind call_kind = load->NeedsEnvironment()
- ? ((load->GetLoadKind() == HLoadString::LoadKind::kDexCacheViaMethod)
- ? LocationSummary::kCallOnMainOnly
- : LocationSummary::kCallOnSlowPath)
- : LocationSummary::kNoCall;
+ LocationSummary::CallKind call_kind = CodeGenerator::GetLoadStringCallKind(load);
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(load, call_kind);
if (load->GetLoadKind() == HLoadString::LoadKind::kDexCacheViaMethod) {
locations->SetOut(Location::RegisterLocation(RAX));
@@ -5667,6 +5667,14 @@
}
}
+Label* CodeGeneratorX86_64::NewJitRootStringPatch(const DexFile& dex_file, uint32_t dex_index) {
+ jit_string_roots_.Overwrite(StringReference(&dex_file, dex_index), /* placeholder */ 0u);
+ // Add a patch entry and return the label.
+ jit_string_patches_.emplace_back(dex_file, dex_index);
+ PatchInfo<Label>* info = &jit_string_patches_.back();
+ return &info->label;
+}
+
void InstructionCodeGeneratorX86_64::VisitLoadString(HLoadString* load) {
LocationSummary* locations = load->GetLocations();
Location out_loc = locations->Out();
@@ -5698,6 +5706,15 @@
__ Bind(slow_path->GetExitLabel());
return;
}
+ case HLoadString::LoadKind::kJitTableAddress: {
+ Address address = Address::Absolute(CodeGeneratorX86_64::kDummy32BitOffset,
+ /* no_rip */ true);
+ Label* fixup_label =
+ codegen_->NewJitRootStringPatch(load->GetDexFile(), load->GetStringIndex());
+ // /* GcRoot<mirror::String> */ out = *address
+ GenerateGcRootFieldLoad(load, out_loc, address, fixup_label, kCompilerReadBarrierOption);
+ return;
+ }
default:
break;
}
@@ -7076,6 +7093,20 @@
}
}
+void CodeGeneratorX86_64::EmitJitRootPatches(uint8_t* code, const uint8_t* roots_data) {
+ for (const PatchInfo<Label>& info : jit_string_patches_) {
+ const auto& it = jit_string_roots_.find(StringReference(&info.dex_file, info.index));
+ DCHECK(it != jit_string_roots_.end());
+ size_t index_in_table = it->second;
+ uint32_t code_offset = info.label.Position() - kLabelPositionToLiteralOffsetAdjustment;
+ uintptr_t address =
+ reinterpret_cast<uintptr_t>(roots_data) + index_in_table * sizeof(GcRoot<mirror::Object>);
+ typedef __attribute__((__aligned__(1))) uint32_t unaligned_uint32_t;
+ reinterpret_cast<unaligned_uint32_t*>(code + code_offset)[0] =
+ dchecked_integral_cast<uint32_t>(address);
+ }
+}
+
#undef __
} // namespace x86_64
diff --git a/compiler/optimizing/code_generator_x86_64.h b/compiler/optimizing/code_generator_x86_64.h
index e5a4152..0f70b15 100644
--- a/compiler/optimizing/code_generator_x86_64.h
+++ b/compiler/optimizing/code_generator_x86_64.h
@@ -412,11 +412,14 @@
void RecordTypePatch(HLoadClass* load_class);
Label* NewStringBssEntryPatch(HLoadString* load_string);
Label* NewPcRelativeDexCacheArrayPatch(const DexFile& dex_file, uint32_t element_offset);
+ Label* NewJitRootStringPatch(const DexFile& dex_file, uint32_t dex_index);
void MoveFromReturnRegister(Location trg, Primitive::Type type) OVERRIDE;
void EmitLinkerPatches(ArenaVector<LinkerPatch>* linker_patches) OVERRIDE;
+ void EmitJitRootPatches(uint8_t* code, const uint8_t* roots_data) OVERRIDE;
+
const X86_64InstructionSetFeatures& GetInstructionSetFeatures() const {
return isa_features_;
}
@@ -602,6 +605,9 @@
// Fixups for jump tables need to be handled specially.
ArenaVector<JumpTableRIPFixup*> fixups_to_jump_tables_;
+ // Patches for string literals in JIT compiled code.
+ ArenaDeque<PatchInfo<Label>> jit_string_patches_;
+
DISALLOW_COPY_AND_ASSIGN(CodeGeneratorX86_64);
};
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index e0c582a..215ed54 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -5690,7 +5690,10 @@
// all other types are unavailable.
kDexCacheViaMethod,
- kLast = kDexCacheViaMethod
+ // Load from the root table associated with the JIT compiled method.
+ kJitTableAddress,
+
+ kLast = kJitTableAddress,
};
HLoadString(HCurrentMethod* current_method,
@@ -5748,7 +5751,8 @@
LoadKind load_kind = GetLoadKind();
if (load_kind == LoadKind::kBootImageLinkTimeAddress ||
load_kind == LoadKind::kBootImageLinkTimePcRelative ||
- load_kind == LoadKind::kBootImageAddress) {
+ load_kind == LoadKind::kBootImageAddress ||
+ load_kind == LoadKind::kJitTableAddress) {
return false;
}
return !IsInDexCache();
@@ -5801,7 +5805,8 @@
return load_kind == LoadKind::kBootImageLinkTimeAddress ||
load_kind == LoadKind::kBootImageLinkTimePcRelative ||
load_kind == LoadKind::kBssEntry ||
- load_kind == LoadKind::kDexCacheViaMethod;
+ load_kind == LoadKind::kDexCacheViaMethod ||
+ load_kind == LoadKind::kJitTableAddress;
}
static bool HasAddress(LoadKind load_kind) {
diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index 6f84cdc..1add660 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -117,6 +117,7 @@
size_t GetSize() const { return size_; }
const ArenaVector<uint8_t>& GetMemory() const { return memory_; }
+ uint8_t* GetData() { return memory_.data(); }
private:
ArenaVector<uint8_t> memory_;
@@ -1126,7 +1127,7 @@
jit::JitCodeCache* code_cache,
ArtMethod* method,
bool osr) {
- StackHandleScope<2> hs(self);
+ StackHandleScope<3> hs(self);
Handle<mirror::ClassLoader> class_loader(hs.NewHandle(
method->GetDeclaringClass()->GetClassLoader()));
Handle<mirror::DexCache> dex_cache(hs.NewHandle(method->GetDexCache()));
@@ -1172,22 +1173,43 @@
}
size_t stack_map_size = codegen->ComputeStackMapsSize();
- uint8_t* stack_map_data = code_cache->ReserveData(self, stack_map_size, method);
- if (stack_map_data == nullptr) {
+ size_t number_of_roots = codegen->GetNumberOfJitRoots();
+ ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
+ // We allocate an object array to ensure the JIT roots that we will collect in EmitJitRoots
+ // will be visible by the GC between EmitLiterals and CommitCode. Once CommitCode is
+ // executed, this array is not needed.
+ Handle<mirror::ObjectArray<mirror::Object>> roots(
+ hs.NewHandle(mirror::ObjectArray<mirror::Object>::Alloc(
+ self, class_linker->GetClassRoot(ClassLinker::kObjectArrayClass), number_of_roots)));
+ if (roots.Get() == nullptr) {
+ // Out of memory, just clear the exception to avoid any Java exception uncaught problems.
+ DCHECK(self->IsExceptionPending());
+ self->ClearException();
+ return false;
+ }
+ uint8_t* stack_map_data = nullptr;
+ uint8_t* roots_data = nullptr;
+ code_cache->ReserveData(
+ self, stack_map_size, number_of_roots, method, &stack_map_data, &roots_data);
+ if (stack_map_data == nullptr || roots_data == nullptr) {
return false;
}
MaybeRecordStat(MethodCompilationStat::kCompiled);
codegen->BuildStackMaps(MemoryRegion(stack_map_data, stack_map_size), *code_item);
+ codegen->EmitJitRoots(code_allocator.GetData(), roots, roots_data, dex_cache);
+
const void* code = code_cache->CommitCode(
self,
method,
stack_map_data,
+ roots_data,
codegen->HasEmptyFrame() ? 0 : codegen->GetFrameSize(),
codegen->GetCoreSpillMask(),
codegen->GetFpuSpillMask(),
code_allocator.GetMemory().data(),
code_allocator.GetSize(),
- osr);
+ osr,
+ roots);
if (code == nullptr) {
code_cache->ClearData(self, stack_map_data);
diff --git a/compiler/optimizing/sharpening.cc b/compiler/optimizing/sharpening.cc
index 63e4ca6..15254ed 100644
--- a/compiler/optimizing/sharpening.cc
+++ b/compiler/optimizing/sharpening.cc
@@ -281,7 +281,8 @@
: hs.NewHandle(class_linker->FindDexCache(soa.Self(), dex_file));
if (codegen_->GetCompilerOptions().IsBootImage()) {
- // Compiling boot image. Resolve the string and allocate it if needed.
+ // Compiling boot image. Resolve the string and allocate it if needed, to ensure
+ // the string will be added to the boot image.
DCHECK(!runtime->UseJitCompilation());
mirror::String* string = class_linker->ResolveString(dex_file, string_index, dex_cache);
CHECK(string != nullptr);
@@ -297,10 +298,14 @@
} else if (runtime->UseJitCompilation()) {
// TODO: Make sure we don't set the "compile PIC" flag for JIT as that's bogus.
// DCHECK(!codegen_->GetCompilerOptions().GetCompilePic());
- mirror::String* string = dex_cache->GetResolvedString(string_index);
- if (string != nullptr && runtime->GetHeap()->ObjectIsInBootImageSpace(string)) {
- desired_load_kind = HLoadString::LoadKind::kBootImageAddress;
- address = reinterpret_cast64<uint64_t>(string);
+ mirror::String* string = class_linker->LookupString(dex_file, string_index, dex_cache);
+ if (string != nullptr) {
+ if (runtime->GetHeap()->ObjectIsInBootImageSpace(string)) {
+ desired_load_kind = HLoadString::LoadKind::kBootImageAddress;
+ address = reinterpret_cast64<uint64_t>(string);
+ } else {
+ desired_load_kind = HLoadString::LoadKind::kJitTableAddress;
+ }
}
} else {
// AOT app compilation. Try to lookup the string without allocating if not found.
@@ -322,6 +327,7 @@
case HLoadString::LoadKind::kBootImageLinkTimePcRelative:
case HLoadString::LoadKind::kBssEntry:
case HLoadString::LoadKind::kDexCacheViaMethod:
+ case HLoadString::LoadKind::kJitTableAddress:
load_string->SetLoadKindWithStringReference(load_kind, dex_file, string_index);
break;
case HLoadString::LoadKind::kBootImageAddress:
diff --git a/runtime/jit/jit_code_cache.cc b/runtime/jit/jit_code_cache.cc
index a26d850..2143adc 100644
--- a/runtime/jit/jit_code_cache.cc
+++ b/runtime/jit/jit_code_cache.cc
@@ -80,8 +80,18 @@
std::string error_str;
// Map name specific for android_os_Debug.cpp accounting.
+ // Map in low 4gb to simplify accessing root tables for x86_64.
+ // We could do PC-relative addressing to avoid this problem, but that
+ // would require reserving code and data area before submitting, which
+ // means more windows for the code memory to be RWX.
MemMap* data_map = MemMap::MapAnonymous(
- "data-code-cache", nullptr, max_capacity, kProtAll, false, false, &error_str, use_ashmem);
+ "data-code-cache", nullptr,
+ max_capacity,
+ kProtAll,
+ /* low_4gb */ true,
+ /* reuse */ false,
+ &error_str,
+ use_ashmem);
if (data_map == nullptr) {
std::ostringstream oss;
oss << "Failed to create read write execute cache: " << error_str << " size=" << max_capacity;
@@ -197,34 +207,40 @@
uint8_t* JitCodeCache::CommitCode(Thread* self,
ArtMethod* method,
- const uint8_t* vmap_table,
+ uint8_t* stack_map,
+ uint8_t* roots_data,
size_t frame_size_in_bytes,
size_t core_spill_mask,
size_t fp_spill_mask,
const uint8_t* code,
size_t code_size,
- bool osr) {
+ bool osr,
+ Handle<mirror::ObjectArray<mirror::Object>> roots) {
uint8_t* result = CommitCodeInternal(self,
method,
- vmap_table,
+ stack_map,
+ roots_data,
frame_size_in_bytes,
core_spill_mask,
fp_spill_mask,
code,
code_size,
- osr);
+ osr,
+ roots);
if (result == nullptr) {
// Retry.
GarbageCollectCache(self);
result = CommitCodeInternal(self,
method,
- vmap_table,
+ stack_map,
+ roots_data,
frame_size_in_bytes,
core_spill_mask,
fp_spill_mask,
code,
code_size,
- osr);
+ osr,
+ roots);
}
return result;
}
@@ -243,20 +259,67 @@
return reinterpret_cast<uintptr_t>(code) - RoundUp(sizeof(OatQuickMethodHeader), alignment);
}
+static uint32_t ComputeRootTableSize(uint32_t number_of_roots) {
+ return sizeof(uint32_t) + number_of_roots * sizeof(GcRoot<mirror::Object>);
+}
+
+static uint32_t GetNumberOfRoots(const uint8_t* stack_map) {
+ // The length of the table is stored just before the stack map (and therefore at the end of
+ // the table itself), in order to be able to fetch it from a `stack_map` pointer.
+ return reinterpret_cast<const uint32_t*>(stack_map)[-1];
+}
+
+static void FillRootTable(uint8_t* roots_data, Handle<mirror::ObjectArray<mirror::Object>> roots)
+ REQUIRES_SHARED(Locks::mutator_lock_) {
+ GcRoot<mirror::Object>* gc_roots = reinterpret_cast<GcRoot<mirror::Object>*>(roots_data);
+ uint32_t length = roots->GetLength();
+ // Put all roots in `roots_data`.
+ for (uint32_t i = 0; i < length; ++i) {
+ gc_roots[i] = GcRoot<mirror::Object>(roots->Get(i));
+ }
+ // Store the length of the table at the end. This will allow fetching it from a `stack_map`
+ // pointer.
+ reinterpret_cast<uint32_t*>(gc_roots + length)[0] = length;
+}
+
+static uint8_t* GetRootTable(const void* code_ptr, uint32_t* number_of_roots = nullptr) {
+ OatQuickMethodHeader* method_header = OatQuickMethodHeader::FromCodePointer(code_ptr);
+ uint8_t* data = method_header->GetOptimizedCodeInfoPtr();
+ uint32_t roots = GetNumberOfRoots(data);
+ if (number_of_roots != nullptr) {
+ *number_of_roots = roots;
+ }
+ return data - ComputeRootTableSize(roots);
+}
+
+void JitCodeCache::SweepRootTables(IsMarkedVisitor* visitor) {
+ MutexLock mu(Thread::Current(), lock_);
+ for (const auto& entry : method_code_map_) {
+ uint32_t number_of_roots = 0;
+ uint8_t* roots_data = GetRootTable(entry.first, &number_of_roots);
+ GcRoot<mirror::Object>* roots = reinterpret_cast<GcRoot<mirror::Object>*>(roots_data);
+ for (uint32_t i = 0; i < number_of_roots; ++i) {
+ // This does not need a read barrier because this is called by GC.
+ mirror::Object* object = roots[i].Read<kWithoutReadBarrier>();
+ DCHECK(object != nullptr);
+ mirror::Object* new_string = visitor->IsMarked(object);
+ // We know the string is marked because it's a strongly-interned string that
+ // is always alive.
+ // TODO: Do not use IsMarked for j.l.Class, and adjust once we move this method
+ // out of the weak access/creation pause. b/32167580
+ DCHECK(new_string != nullptr);
+ DCHECK(new_string->IsString());
+ roots[i] = GcRoot<mirror::Object>(new_string);
+ }
+ }
+}
+
void JitCodeCache::FreeCode(const void* code_ptr, ArtMethod* method ATTRIBUTE_UNUSED) {
uintptr_t allocation = FromCodeToAllocation(code_ptr);
- const OatQuickMethodHeader* method_header = OatQuickMethodHeader::FromCodePointer(code_ptr);
// Notify native debugger that we are about to remove the code.
// It does nothing if we are not using native debugger.
DeleteJITCodeEntryForAddress(reinterpret_cast<uintptr_t>(code_ptr));
-
- // Use the offset directly to prevent sanity check that the method is
- // compiled with optimizing.
- // TODO(ngeoffray): Clean up.
- if (method_header->vmap_table_offset_ != 0) {
- const uint8_t* data = method_header->code_ - method_header->vmap_table_offset_;
- FreeData(const_cast<uint8_t*>(data));
- }
+ FreeData(GetRootTable(code_ptr));
FreeCode(reinterpret_cast<uint8_t*>(allocation));
}
@@ -308,13 +371,16 @@
uint8_t* JitCodeCache::CommitCodeInternal(Thread* self,
ArtMethod* method,
- const uint8_t* vmap_table,
+ uint8_t* stack_map,
+ uint8_t* roots_data,
size_t frame_size_in_bytes,
size_t core_spill_mask,
size_t fp_spill_mask,
const uint8_t* code,
size_t code_size,
- bool osr) {
+ bool osr,
+ Handle<mirror::ObjectArray<mirror::Object>> roots) {
+ DCHECK(stack_map != nullptr);
size_t alignment = GetInstructionSetAlignment(kRuntimeISA);
// Ensure the header ends up at expected instruction alignment.
size_t header_size = RoundUp(sizeof(OatQuickMethodHeader), alignment);
@@ -338,7 +404,7 @@
std::copy(code, code + code_size, code_ptr);
method_header = OatQuickMethodHeader::FromCodePointer(code_ptr);
new (method_header) OatQuickMethodHeader(
- (vmap_table == nullptr) ? 0 : code_ptr - vmap_table,
+ code_ptr - stack_map,
frame_size_in_bytes,
core_spill_mask,
fp_spill_mask,
@@ -353,6 +419,8 @@
{
MutexLock mu(self, lock_);
method_code_map_.Put(code_ptr, method);
+ // Fill the root table before updating the entry point.
+ FillRootTable(roots_data, roots);
if (osr) {
number_of_osr_compilations_++;
osr_code_map_.Put(method, code_ptr);
@@ -408,8 +476,14 @@
FreeData(reinterpret_cast<uint8_t*>(data));
}
-uint8_t* JitCodeCache::ReserveData(Thread* self, size_t size, ArtMethod* method) {
- size = RoundUp(size, sizeof(void*));
+void JitCodeCache::ReserveData(Thread* self,
+ size_t stack_map_size,
+ size_t number_of_roots,
+ ArtMethod* method,
+ uint8_t** stack_map_data,
+ uint8_t** roots_data) {
+ size_t table_size = ComputeRootTableSize(number_of_roots);
+ size_t size = RoundUp(stack_map_size + table_size, sizeof(void*));
uint8_t* result = nullptr;
{
@@ -436,7 +510,8 @@
<< " for stack maps of "
<< ArtMethod::PrettyMethod(method);
}
- return result;
+ *roots_data = result;
+ *stack_map_data = result + table_size;
}
class MarkCodeVisitor FINAL : public StackVisitor {
diff --git a/runtime/jit/jit_code_cache.h b/runtime/jit/jit_code_cache.h
index e15c93a..a97ef68 100644
--- a/runtime/jit/jit_code_cache.h
+++ b/runtime/jit/jit_code_cache.h
@@ -92,13 +92,15 @@
// Allocate and write code and its metadata to the code cache.
uint8_t* CommitCode(Thread* self,
ArtMethod* method,
- const uint8_t* vmap_table,
+ uint8_t* stack_map,
+ uint8_t* roots_data,
size_t frame_size_in_bytes,
size_t core_spill_mask,
size_t fp_spill_mask,
const uint8_t* code,
size_t code_size,
- bool osr)
+ bool osr,
+ Handle<mirror::ObjectArray<mirror::Object>> roots)
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!lock_);
@@ -108,8 +110,14 @@
// Return true if the code cache contains this method.
bool ContainsMethod(ArtMethod* method) REQUIRES(!lock_);
- // Reserve a region of data of size at least "size". Returns null if there is no more room.
- uint8_t* ReserveData(Thread* self, size_t size, ArtMethod* method)
+ // Allocate a region of data that contain `size` bytes, and potentially space
+ // for storing `number_of_roots` roots. Returns null if there is no more room.
+ void ReserveData(Thread* self,
+ size_t size,
+ size_t number_of_roots,
+ ArtMethod* method,
+ uint8_t** stack_map_data,
+ uint8_t** roots_data)
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!lock_);
@@ -188,6 +196,10 @@
bool IsOsrCompiled(ArtMethod* method) REQUIRES(!lock_);
+ void SweepRootTables(IsMarkedVisitor* visitor)
+ REQUIRES(!lock_)
+ REQUIRES_SHARED(Locks::mutator_lock_);
+
private:
// Take ownership of maps.
JitCodeCache(MemMap* code_map,
@@ -201,13 +213,15 @@
// allocation fails. Return null if the allocation fails.
uint8_t* CommitCodeInternal(Thread* self,
ArtMethod* method,
- const uint8_t* vmap_table,
+ uint8_t* stack_map,
+ uint8_t* roots_data,
size_t frame_size_in_bytes,
size_t core_spill_mask,
size_t fp_spill_mask,
const uint8_t* code,
size_t code_size,
- bool osr)
+ bool osr,
+ Handle<mirror::ObjectArray<mirror::Object>> roots)
REQUIRES(!lock_)
REQUIRES_SHARED(Locks::mutator_lock_);
diff --git a/runtime/oat_quick_method_header.h b/runtime/oat_quick_method_header.h
index ee5002f..4afca7d 100644
--- a/runtime/oat_quick_method_header.h
+++ b/runtime/oat_quick_method_header.h
@@ -67,6 +67,11 @@
return data;
}
+ uint8_t* GetOptimizedCodeInfoPtr() {
+ DCHECK(IsOptimized());
+ return code_ - vmap_table_offset_;
+ }
+
CodeInfo GetOptimizedCodeInfo() const {
return CodeInfo(GetOptimizedCodeInfoPtr());
}
diff --git a/runtime/runtime.cc b/runtime/runtime.cc
index ca65c2b..d90e896 100644
--- a/runtime/runtime.cc
+++ b/runtime/runtime.cc
@@ -81,6 +81,7 @@
#include "intern_table.h"
#include "interpreter/interpreter.h"
#include "jit/jit.h"
+#include "jit/jit_code_cache.h"
#include "jni_internal.h"
#include "linear_alloc.h"
#include "mirror/array.h"
@@ -491,6 +492,14 @@
GetMonitorList()->SweepMonitorList(visitor);
GetJavaVM()->SweepJniWeakGlobals(visitor);
GetHeap()->SweepAllocationRecords(visitor);
+ if (GetJit() != nullptr) {
+ // Visit JIT literal tables. Objects in these tables are classes and strings
+ // and only classes can be affected by class unloading. The strings always
+ // stay alive as they are strongly interned.
+ // TODO: Move this closer to CleanupClassLoaders, to avoid blocking weak accesses
+ // from mutators. See b/32167580.
+ GetJit()->GetCodeCache()->SweepRootTables(visitor);
+ }
// All other generic system-weak holders.
for (gc::AbstractSystemWeakHolder* holder : system_weak_holders_) {
