You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
786 lines
36 KiB
786 lines
36 KiB
/*
|
|
* Copyright (C) 2011 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "jni_compiler.h"
|
|
|
|
#include <algorithm>
|
|
#include <fstream>
|
|
#include <ios>
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
#include "art_method.h"
|
|
#include "base/arena_allocator.h"
|
|
#include "base/arena_containers.h"
|
|
#include "base/enums.h"
|
|
#include "base/logging.h" // For VLOG.
|
|
#include "base/macros.h"
|
|
#include "base/malloc_arena_pool.h"
|
|
#include "base/memory_region.h"
|
|
#include "base/utils.h"
|
|
#include "calling_convention.h"
|
|
#include "class_linker.h"
|
|
#include "dwarf/debug_frame_opcode_writer.h"
|
|
#include "dex/dex_file-inl.h"
|
|
#include "driver/compiler_options.h"
|
|
#include "entrypoints/quick/quick_entrypoints.h"
|
|
#include "jni/jni_env_ext.h"
|
|
#include "thread.h"
|
|
#include "utils/arm/managed_register_arm.h"
|
|
#include "utils/arm64/managed_register_arm64.h"
|
|
#include "utils/assembler.h"
|
|
#include "utils/jni_macro_assembler.h"
|
|
#include "utils/managed_register.h"
|
|
#include "utils/x86/managed_register_x86.h"
|
|
|
|
#define __ jni_asm->
|
|
|
|
namespace art {
|
|
|
|
template <PointerSize kPointerSize>
|
|
static void CopyParameter(JNIMacroAssembler<kPointerSize>* jni_asm,
|
|
ManagedRuntimeCallingConvention* mr_conv,
|
|
JniCallingConvention* jni_conv);
|
|
template <PointerSize kPointerSize>
|
|
static void SetNativeParameter(JNIMacroAssembler<kPointerSize>* jni_asm,
|
|
JniCallingConvention* jni_conv,
|
|
ManagedRegister in_reg);
|
|
|
|
template <PointerSize kPointerSize>
|
|
static std::unique_ptr<JNIMacroAssembler<kPointerSize>> GetMacroAssembler(
|
|
ArenaAllocator* allocator, InstructionSet isa, const InstructionSetFeatures* features) {
|
|
return JNIMacroAssembler<kPointerSize>::Create(allocator, isa, features);
|
|
}
|
|
|
|
enum class JniEntrypoint {
|
|
kStart,
|
|
kEnd
|
|
};
|
|
|
|
template <PointerSize kPointerSize>
|
|
static ThreadOffset<kPointerSize> GetJniEntrypointThreadOffset(JniEntrypoint which,
|
|
bool reference_return,
|
|
bool is_synchronized,
|
|
bool is_fast_native) {
|
|
if (which == JniEntrypoint::kStart) { // JniMethodStart
|
|
ThreadOffset<kPointerSize> jni_start =
|
|
is_synchronized
|
|
? QUICK_ENTRYPOINT_OFFSET(kPointerSize, pJniMethodStartSynchronized)
|
|
: (is_fast_native
|
|
? QUICK_ENTRYPOINT_OFFSET(kPointerSize, pJniMethodFastStart)
|
|
: QUICK_ENTRYPOINT_OFFSET(kPointerSize, pJniMethodStart));
|
|
|
|
return jni_start;
|
|
} else { // JniMethodEnd
|
|
ThreadOffset<kPointerSize> jni_end(-1);
|
|
if (reference_return) {
|
|
// Pass result.
|
|
jni_end = is_synchronized
|
|
? QUICK_ENTRYPOINT_OFFSET(kPointerSize, pJniMethodEndWithReferenceSynchronized)
|
|
: (is_fast_native
|
|
? QUICK_ENTRYPOINT_OFFSET(kPointerSize, pJniMethodFastEndWithReference)
|
|
: QUICK_ENTRYPOINT_OFFSET(kPointerSize, pJniMethodEndWithReference));
|
|
} else {
|
|
jni_end = is_synchronized
|
|
? QUICK_ENTRYPOINT_OFFSET(kPointerSize, pJniMethodEndSynchronized)
|
|
: (is_fast_native
|
|
? QUICK_ENTRYPOINT_OFFSET(kPointerSize, pJniMethodFastEnd)
|
|
: QUICK_ENTRYPOINT_OFFSET(kPointerSize, pJniMethodEnd));
|
|
}
|
|
|
|
return jni_end;
|
|
}
|
|
}
|
|
|
|
|
|
// Generate the JNI bridge for the given method, general contract:
|
|
// - Arguments are in the managed runtime format, either on stack or in
|
|
// registers, a reference to the method object is supplied as part of this
|
|
// convention.
|
|
//
|
|
template <PointerSize kPointerSize>
|
|
static JniCompiledMethod ArtJniCompileMethodInternal(const CompilerOptions& compiler_options,
|
|
uint32_t access_flags,
|
|
uint32_t method_idx,
|
|
const DexFile& dex_file) {
|
|
const bool is_native = (access_flags & kAccNative) != 0;
|
|
CHECK(is_native);
|
|
const bool is_static = (access_flags & kAccStatic) != 0;
|
|
const bool is_synchronized = (access_flags & kAccSynchronized) != 0;
|
|
const char* shorty = dex_file.GetMethodShorty(dex_file.GetMethodId(method_idx));
|
|
InstructionSet instruction_set = compiler_options.GetInstructionSet();
|
|
const InstructionSetFeatures* instruction_set_features =
|
|
compiler_options.GetInstructionSetFeatures();
|
|
|
|
// i.e. if the method was annotated with @FastNative
|
|
const bool is_fast_native = (access_flags & kAccFastNative) != 0u;
|
|
|
|
// i.e. if the method was annotated with @CriticalNative
|
|
const bool is_critical_native = (access_flags & kAccCriticalNative) != 0u;
|
|
|
|
VLOG(jni) << "JniCompile: Method :: "
|
|
<< dex_file.PrettyMethod(method_idx, /* with signature */ true)
|
|
<< " :: access_flags = " << std::hex << access_flags << std::dec;
|
|
|
|
if (UNLIKELY(is_fast_native)) {
|
|
VLOG(jni) << "JniCompile: Fast native method detected :: "
|
|
<< dex_file.PrettyMethod(method_idx, /* with signature */ true);
|
|
}
|
|
|
|
if (UNLIKELY(is_critical_native)) {
|
|
VLOG(jni) << "JniCompile: Critical native method detected :: "
|
|
<< dex_file.PrettyMethod(method_idx, /* with signature */ true);
|
|
}
|
|
|
|
if (kIsDebugBuild) {
|
|
// Don't allow both @FastNative and @CriticalNative. They are mutually exclusive.
|
|
if (UNLIKELY(is_fast_native && is_critical_native)) {
|
|
LOG(FATAL) << "JniCompile: Method cannot be both @CriticalNative and @FastNative"
|
|
<< dex_file.PrettyMethod(method_idx, /* with_signature= */ true);
|
|
}
|
|
|
|
// @CriticalNative - extra checks:
|
|
// -- Don't allow virtual criticals
|
|
// -- Don't allow synchronized criticals
|
|
// -- Don't allow any objects as parameter or return value
|
|
if (UNLIKELY(is_critical_native)) {
|
|
CHECK(is_static)
|
|
<< "@CriticalNative functions cannot be virtual since that would"
|
|
<< "require passing a reference parameter (this), which is illegal "
|
|
<< dex_file.PrettyMethod(method_idx, /* with_signature= */ true);
|
|
CHECK(!is_synchronized)
|
|
<< "@CriticalNative functions cannot be synchronized since that would"
|
|
<< "require passing a (class and/or this) reference parameter, which is illegal "
|
|
<< dex_file.PrettyMethod(method_idx, /* with_signature= */ true);
|
|
for (size_t i = 0; i < strlen(shorty); ++i) {
|
|
CHECK_NE(Primitive::kPrimNot, Primitive::GetType(shorty[i]))
|
|
<< "@CriticalNative methods' shorty types must not have illegal references "
|
|
<< dex_file.PrettyMethod(method_idx, /* with_signature= */ true);
|
|
}
|
|
}
|
|
}
|
|
|
|
MallocArenaPool pool;
|
|
ArenaAllocator allocator(&pool);
|
|
|
|
// Calling conventions used to iterate over parameters to method
|
|
std::unique_ptr<JniCallingConvention> main_jni_conv =
|
|
JniCallingConvention::Create(&allocator,
|
|
is_static,
|
|
is_synchronized,
|
|
is_critical_native,
|
|
shorty,
|
|
instruction_set);
|
|
bool reference_return = main_jni_conv->IsReturnAReference();
|
|
|
|
std::unique_ptr<ManagedRuntimeCallingConvention> mr_conv(
|
|
ManagedRuntimeCallingConvention::Create(
|
|
&allocator, is_static, is_synchronized, shorty, instruction_set));
|
|
|
|
// Calling conventions to call into JNI method "end" possibly passing a returned reference, the
|
|
// method and the current thread.
|
|
const char* jni_end_shorty;
|
|
if (reference_return && is_synchronized) {
|
|
jni_end_shorty = "ILL";
|
|
} else if (reference_return) {
|
|
jni_end_shorty = "IL";
|
|
} else if (is_synchronized) {
|
|
jni_end_shorty = "VL";
|
|
} else {
|
|
jni_end_shorty = "V";
|
|
}
|
|
|
|
std::unique_ptr<JniCallingConvention> end_jni_conv(
|
|
JniCallingConvention::Create(&allocator,
|
|
is_static,
|
|
is_synchronized,
|
|
is_critical_native,
|
|
jni_end_shorty,
|
|
instruction_set));
|
|
|
|
// Assembler that holds generated instructions
|
|
std::unique_ptr<JNIMacroAssembler<kPointerSize>> jni_asm =
|
|
GetMacroAssembler<kPointerSize>(&allocator, instruction_set, instruction_set_features);
|
|
jni_asm->cfi().SetEnabled(compiler_options.GenerateAnyDebugInfo());
|
|
jni_asm->SetEmitRunTimeChecksInDebugMode(compiler_options.EmitRunTimeChecksInDebugMode());
|
|
|
|
// 1. Build the frame saving all callee saves, Method*, and PC return address.
|
|
// For @CriticalNative, this includes space for out args, otherwise just the managed frame.
|
|
const size_t managed_frame_size = main_jni_conv->FrameSize();
|
|
const size_t main_out_arg_size = main_jni_conv->OutFrameSize();
|
|
size_t current_frame_size = is_critical_native ? main_out_arg_size : managed_frame_size;
|
|
ManagedRegister method_register =
|
|
is_critical_native ? ManagedRegister::NoRegister() : mr_conv->MethodRegister();
|
|
ArrayRef<const ManagedRegister> callee_save_regs = main_jni_conv->CalleeSaveRegisters();
|
|
__ BuildFrame(current_frame_size, method_register, callee_save_regs);
|
|
DCHECK_EQ(jni_asm->cfi().GetCurrentCFAOffset(), static_cast<int>(current_frame_size));
|
|
|
|
if (LIKELY(!is_critical_native)) {
|
|
// Spill all register arguments.
|
|
// TODO: Pass these in a single call to let the assembler use multi-register stores.
|
|
// TODO: Spill native stack args straight to their stack locations (adjust SP earlier).
|
|
mr_conv->ResetIterator(FrameOffset(current_frame_size));
|
|
for (; mr_conv->HasNext(); mr_conv->Next()) {
|
|
if (mr_conv->IsCurrentParamInRegister()) {
|
|
size_t size = mr_conv->IsCurrentParamALongOrDouble() ? 8u : 4u;
|
|
__ Store(mr_conv->CurrentParamStackOffset(), mr_conv->CurrentParamRegister(), size);
|
|
}
|
|
}
|
|
|
|
// 2. Write out the end of the quick frames.
|
|
__ StoreStackPointerToThread(Thread::TopOfManagedStackOffset<kPointerSize>());
|
|
|
|
// NOTE: @CriticalNative does not need to store the stack pointer to the thread
|
|
// because garbage collections are disabled within the execution of a
|
|
// @CriticalNative method.
|
|
// (TODO: We could probably disable it for @FastNative too).
|
|
} // if (!is_critical_native)
|
|
|
|
// 3. Move frame down to allow space for out going args.
|
|
size_t current_out_arg_size = main_out_arg_size;
|
|
if (UNLIKELY(is_critical_native)) {
|
|
DCHECK_EQ(main_out_arg_size, current_frame_size);
|
|
} else {
|
|
__ IncreaseFrameSize(main_out_arg_size);
|
|
current_frame_size += main_out_arg_size;
|
|
}
|
|
|
|
// 4. Check if we need to go to the slow path to emit the read barrier for the declaring class
|
|
// in the method for a static call.
|
|
// Skip this for @CriticalNative because we're not passing a `jclass` to the native method.
|
|
std::unique_ptr<JNIMacroLabel> jclass_read_barrier_slow_path;
|
|
std::unique_ptr<JNIMacroLabel> jclass_read_barrier_return;
|
|
if (kUseReadBarrier && is_static && !is_critical_native) {
|
|
jclass_read_barrier_slow_path = __ CreateLabel();
|
|
jclass_read_barrier_return = __ CreateLabel();
|
|
|
|
// Check if gc_is_marking is set -- if it's not, we don't need a read barrier.
|
|
__ TestGcMarking(jclass_read_barrier_slow_path.get(), JNIMacroUnaryCondition::kNotZero);
|
|
|
|
// If marking, the slow path returns after the check.
|
|
__ Bind(jclass_read_barrier_return.get());
|
|
}
|
|
|
|
// 5. Call into appropriate JniMethodStart passing Thread* so that transition out of Runnable
|
|
// can occur. The result is the saved JNI local state that is restored by the exit call. We
|
|
// abuse the JNI calling convention here, that is guaranteed to support passing 2 pointer
|
|
// arguments.
|
|
constexpr size_t cookie_size = JniCallingConvention::SavedLocalReferenceCookieSize();
|
|
ManagedRegister saved_cookie_register = ManagedRegister::NoRegister();
|
|
if (LIKELY(!is_critical_native)) {
|
|
// Skip this for @CriticalNative methods. They do not call JniMethodStart.
|
|
ThreadOffset<kPointerSize> jni_start(
|
|
GetJniEntrypointThreadOffset<kPointerSize>(JniEntrypoint::kStart,
|
|
reference_return,
|
|
is_synchronized,
|
|
is_fast_native).SizeValue());
|
|
main_jni_conv->ResetIterator(FrameOffset(main_out_arg_size));
|
|
if (is_synchronized) {
|
|
// Pass object for locking.
|
|
if (is_static) {
|
|
// Pass the pointer to the method's declaring class as the first argument.
|
|
DCHECK_EQ(ArtMethod::DeclaringClassOffset().SizeValue(), 0u);
|
|
SetNativeParameter(jni_asm.get(), main_jni_conv.get(), method_register);
|
|
} else {
|
|
// TODO: Use the register that still holds the `this` reference.
|
|
mr_conv->ResetIterator(FrameOffset(current_frame_size));
|
|
FrameOffset this_offset = mr_conv->CurrentParamStackOffset();
|
|
if (main_jni_conv->IsCurrentParamOnStack()) {
|
|
FrameOffset out_off = main_jni_conv->CurrentParamStackOffset();
|
|
__ CreateJObject(out_off, this_offset, /*null_allowed=*/ false);
|
|
} else {
|
|
ManagedRegister out_reg = main_jni_conv->CurrentParamRegister();
|
|
__ CreateJObject(out_reg,
|
|
this_offset,
|
|
ManagedRegister::NoRegister(),
|
|
/*null_allowed=*/ false);
|
|
}
|
|
}
|
|
main_jni_conv->Next();
|
|
}
|
|
if (main_jni_conv->IsCurrentParamInRegister()) {
|
|
__ GetCurrentThread(main_jni_conv->CurrentParamRegister());
|
|
__ Call(main_jni_conv->CurrentParamRegister(), Offset(jni_start));
|
|
} else {
|
|
__ GetCurrentThread(main_jni_conv->CurrentParamStackOffset());
|
|
__ CallFromThread(jni_start);
|
|
}
|
|
method_register = ManagedRegister::NoRegister(); // Method register is clobbered.
|
|
if (is_synchronized) { // Check for exceptions from monitor enter.
|
|
__ ExceptionPoll(main_out_arg_size);
|
|
}
|
|
|
|
// Store into stack_frame[saved_cookie_offset] the return value of JniMethodStart.
|
|
saved_cookie_register = main_jni_conv->SavedLocalReferenceCookieRegister();
|
|
__ Move(saved_cookie_register, main_jni_conv->IntReturnRegister(), cookie_size);
|
|
}
|
|
|
|
// 6. Fill arguments.
|
|
if (UNLIKELY(is_critical_native)) {
|
|
ArenaVector<ArgumentLocation> src_args(allocator.Adapter());
|
|
ArenaVector<ArgumentLocation> dest_args(allocator.Adapter());
|
|
// Move the method pointer to the hidden argument register.
|
|
size_t pointer_size = static_cast<size_t>(kPointerSize);
|
|
dest_args.push_back(ArgumentLocation(main_jni_conv->HiddenArgumentRegister(), pointer_size));
|
|
src_args.push_back(ArgumentLocation(mr_conv->MethodRegister(), pointer_size));
|
|
// Move normal arguments to their locations.
|
|
mr_conv->ResetIterator(FrameOffset(current_frame_size));
|
|
main_jni_conv->ResetIterator(FrameOffset(main_out_arg_size));
|
|
for (; mr_conv->HasNext(); mr_conv->Next(), main_jni_conv->Next()) {
|
|
DCHECK(main_jni_conv->HasNext());
|
|
size_t size = mr_conv->IsCurrentParamALongOrDouble() ? 8u : 4u;
|
|
src_args.push_back(mr_conv->IsCurrentParamInRegister()
|
|
? ArgumentLocation(mr_conv->CurrentParamRegister(), size)
|
|
: ArgumentLocation(mr_conv->CurrentParamStackOffset(), size));
|
|
dest_args.push_back(main_jni_conv->IsCurrentParamInRegister()
|
|
? ArgumentLocation(main_jni_conv->CurrentParamRegister(), size)
|
|
: ArgumentLocation(main_jni_conv->CurrentParamStackOffset(), size));
|
|
}
|
|
DCHECK(!main_jni_conv->HasNext());
|
|
__ MoveArguments(ArrayRef<ArgumentLocation>(dest_args), ArrayRef<ArgumentLocation>(src_args));
|
|
} else {
|
|
// Iterate over arguments placing values from managed calling convention in
|
|
// to the convention required for a native call (shuffling). For references
|
|
// place an index/pointer to the reference after checking whether it is
|
|
// null (which must be encoded as null).
|
|
// Note: we do this prior to materializing the JNIEnv* and static's jclass to
|
|
// give as many free registers for the shuffle as possible.
|
|
mr_conv->ResetIterator(FrameOffset(current_frame_size));
|
|
uint32_t args_count = 0;
|
|
while (mr_conv->HasNext()) {
|
|
args_count++;
|
|
mr_conv->Next();
|
|
}
|
|
|
|
// Do a backward pass over arguments, so that the generated code will be "mov
|
|
// R2, R3; mov R1, R2" instead of "mov R1, R2; mov R2, R3."
|
|
// TODO: A reverse iterator to improve readability.
|
|
// TODO: This is currently useless as all archs spill args when building the frame.
|
|
// To avoid the full spilling, we would have to do one pass before the BuildFrame()
|
|
// to determine which arg registers are clobbered before they are needed.
|
|
for (uint32_t i = 0; i < args_count; ++i) {
|
|
mr_conv->ResetIterator(FrameOffset(current_frame_size));
|
|
main_jni_conv->ResetIterator(FrameOffset(main_out_arg_size));
|
|
|
|
// Skip the extra JNI parameters for now.
|
|
main_jni_conv->Next(); // Skip JNIEnv*.
|
|
if (is_static) {
|
|
main_jni_conv->Next(); // Skip Class for now.
|
|
}
|
|
// Skip to the argument we're interested in.
|
|
for (uint32_t j = 0; j < args_count - i - 1; ++j) {
|
|
mr_conv->Next();
|
|
main_jni_conv->Next();
|
|
}
|
|
CopyParameter(jni_asm.get(), mr_conv.get(), main_jni_conv.get());
|
|
}
|
|
|
|
// 7. For static method, create jclass argument as a pointer to the method's declaring class.
|
|
if (is_static) {
|
|
main_jni_conv->ResetIterator(FrameOffset(main_out_arg_size));
|
|
main_jni_conv->Next(); // Skip JNIEnv*
|
|
// Load reference to the method's declaring class. The method register has been
|
|
// clobbered by the above call, so we need to load the method from the stack.
|
|
FrameOffset method_offset =
|
|
FrameOffset(current_out_arg_size + mr_conv->MethodStackOffset().SizeValue());
|
|
DCHECK_EQ(ArtMethod::DeclaringClassOffset().SizeValue(), 0u);
|
|
if (main_jni_conv->IsCurrentParamOnStack()) {
|
|
FrameOffset out_off = main_jni_conv->CurrentParamStackOffset();
|
|
__ Copy(out_off, method_offset, static_cast<size_t>(kPointerSize));
|
|
// TODO(x86): Get hold of the register used to copy the method pointer,
|
|
// so that we can use it also for loading the method entrypoint below.
|
|
} else {
|
|
ManagedRegister out_reg = main_jni_conv->CurrentParamRegister();
|
|
__ Load(out_reg, method_offset, static_cast<size_t>(kPointerSize));
|
|
// Reuse the register also for loading the method entrypoint below.
|
|
method_register = out_reg;
|
|
}
|
|
}
|
|
|
|
// Set the iterator back to the incoming Method*.
|
|
main_jni_conv->ResetIterator(FrameOffset(main_out_arg_size));
|
|
|
|
// 8. Create 1st argument, the JNI environment ptr.
|
|
// Register that will hold local indirect reference table
|
|
if (main_jni_conv->IsCurrentParamInRegister()) {
|
|
ManagedRegister jni_env = main_jni_conv->CurrentParamRegister();
|
|
__ LoadRawPtrFromThread(jni_env, Thread::JniEnvOffset<kPointerSize>());
|
|
} else {
|
|
FrameOffset jni_env = main_jni_conv->CurrentParamStackOffset();
|
|
__ CopyRawPtrFromThread(jni_env, Thread::JniEnvOffset<kPointerSize>());
|
|
}
|
|
}
|
|
|
|
// 9. Plant call to native code associated with method.
|
|
MemberOffset jni_entrypoint_offset =
|
|
ArtMethod::EntryPointFromJniOffset(InstructionSetPointerSize(instruction_set));
|
|
if (UNLIKELY(is_critical_native)) {
|
|
if (main_jni_conv->UseTailCall()) {
|
|
__ Jump(main_jni_conv->HiddenArgumentRegister(), jni_entrypoint_offset);
|
|
} else {
|
|
__ Call(main_jni_conv->HiddenArgumentRegister(), jni_entrypoint_offset);
|
|
}
|
|
} else {
|
|
if (method_register.IsRegister()) {
|
|
__ Call(method_register, jni_entrypoint_offset);
|
|
} else {
|
|
__ Call(FrameOffset(current_out_arg_size + mr_conv->MethodStackOffset().SizeValue()),
|
|
jni_entrypoint_offset);
|
|
}
|
|
}
|
|
|
|
// 10. Fix differences in result widths.
|
|
if (main_jni_conv->RequiresSmallResultTypeExtension()) {
|
|
DCHECK(main_jni_conv->HasSmallReturnType());
|
|
CHECK(!is_critical_native || !main_jni_conv->UseTailCall());
|
|
if (main_jni_conv->GetReturnType() == Primitive::kPrimByte ||
|
|
main_jni_conv->GetReturnType() == Primitive::kPrimShort) {
|
|
__ SignExtend(main_jni_conv->ReturnRegister(),
|
|
Primitive::ComponentSize(main_jni_conv->GetReturnType()));
|
|
} else {
|
|
CHECK(main_jni_conv->GetReturnType() == Primitive::kPrimBoolean ||
|
|
main_jni_conv->GetReturnType() == Primitive::kPrimChar);
|
|
__ ZeroExtend(main_jni_conv->ReturnRegister(),
|
|
Primitive::ComponentSize(main_jni_conv->GetReturnType()));
|
|
}
|
|
}
|
|
|
|
// 11. Process return value
|
|
bool spill_return_value = main_jni_conv->SpillsReturnValue();
|
|
FrameOffset return_save_location =
|
|
spill_return_value ? main_jni_conv->ReturnValueSaveLocation() : FrameOffset(0);
|
|
if (spill_return_value) {
|
|
DCHECK(!is_critical_native);
|
|
// For normal JNI, store the return value on the stack because the call to
|
|
// JniMethodEnd will clobber the return value. It will be restored in (13).
|
|
CHECK_LT(return_save_location.Uint32Value(), current_frame_size);
|
|
__ Store(return_save_location,
|
|
main_jni_conv->ReturnRegister(),
|
|
main_jni_conv->SizeOfReturnValue());
|
|
} else if (UNLIKELY(is_critical_native) && main_jni_conv->SizeOfReturnValue() != 0) {
|
|
// For @CriticalNative only,
|
|
// move the JNI return register into the managed return register (if they don't match).
|
|
ManagedRegister jni_return_reg = main_jni_conv->ReturnRegister();
|
|
ManagedRegister mr_return_reg = mr_conv->ReturnRegister();
|
|
|
|
// Check if the JNI return register matches the managed return register.
|
|
// If they differ, only then do we have to do anything about it.
|
|
// Otherwise the return value is already in the right place when we return.
|
|
if (!jni_return_reg.Equals(mr_return_reg)) {
|
|
CHECK(!main_jni_conv->UseTailCall());
|
|
// This is typically only necessary on ARM32 due to native being softfloat
|
|
// while managed is hardfloat.
|
|
// -- For example VMOV {r0, r1} -> D0; VMOV r0 -> S0.
|
|
__ Move(mr_return_reg, jni_return_reg, main_jni_conv->SizeOfReturnValue());
|
|
} else if (jni_return_reg.IsNoRegister() && mr_return_reg.IsNoRegister()) {
|
|
// Check that if the return value is passed on the stack for some reason,
|
|
// that the size matches.
|
|
CHECK_EQ(main_jni_conv->SizeOfReturnValue(), mr_conv->SizeOfReturnValue());
|
|
}
|
|
}
|
|
|
|
if (LIKELY(!is_critical_native)) {
|
|
// Increase frame size for out args if needed by the end_jni_conv.
|
|
const size_t end_out_arg_size = end_jni_conv->OutFrameSize();
|
|
if (end_out_arg_size > current_out_arg_size) {
|
|
size_t out_arg_size_diff = end_out_arg_size - current_out_arg_size;
|
|
current_out_arg_size = end_out_arg_size;
|
|
__ IncreaseFrameSize(out_arg_size_diff);
|
|
current_frame_size += out_arg_size_diff;
|
|
return_save_location = FrameOffset(return_save_location.SizeValue() + out_arg_size_diff);
|
|
}
|
|
end_jni_conv->ResetIterator(FrameOffset(end_out_arg_size));
|
|
|
|
// 12. Call JniMethodEnd
|
|
ThreadOffset<kPointerSize> jni_end(
|
|
GetJniEntrypointThreadOffset<kPointerSize>(JniEntrypoint::kEnd,
|
|
reference_return,
|
|
is_synchronized,
|
|
is_fast_native).SizeValue());
|
|
if (reference_return) {
|
|
// Pass result.
|
|
SetNativeParameter(jni_asm.get(), end_jni_conv.get(), end_jni_conv->ReturnRegister());
|
|
end_jni_conv->Next();
|
|
}
|
|
// Pass saved local reference state.
|
|
if (end_jni_conv->IsCurrentParamOnStack()) {
|
|
FrameOffset out_off = end_jni_conv->CurrentParamStackOffset();
|
|
__ Store(out_off, saved_cookie_register, cookie_size);
|
|
} else {
|
|
ManagedRegister out_reg = end_jni_conv->CurrentParamRegister();
|
|
__ Move(out_reg, saved_cookie_register, cookie_size);
|
|
}
|
|
end_jni_conv->Next();
|
|
if (is_synchronized) {
|
|
// Pass object for unlocking.
|
|
if (is_static) {
|
|
// Load reference to the method's declaring class. The method register has been
|
|
// clobbered by the above call, so we need to load the method from the stack.
|
|
FrameOffset method_offset =
|
|
FrameOffset(current_out_arg_size + mr_conv->MethodStackOffset().SizeValue());
|
|
DCHECK_EQ(ArtMethod::DeclaringClassOffset().SizeValue(), 0u);
|
|
if (end_jni_conv->IsCurrentParamOnStack()) {
|
|
FrameOffset out_off = end_jni_conv->CurrentParamStackOffset();
|
|
__ Copy(out_off, method_offset, static_cast<size_t>(kPointerSize));
|
|
} else {
|
|
ManagedRegister out_reg = end_jni_conv->CurrentParamRegister();
|
|
__ Load(out_reg, method_offset, static_cast<size_t>(kPointerSize));
|
|
}
|
|
} else {
|
|
mr_conv->ResetIterator(FrameOffset(current_frame_size));
|
|
FrameOffset this_offset = mr_conv->CurrentParamStackOffset();
|
|
if (end_jni_conv->IsCurrentParamOnStack()) {
|
|
FrameOffset out_off = end_jni_conv->CurrentParamStackOffset();
|
|
__ CreateJObject(out_off, this_offset, /*null_allowed=*/ false);
|
|
} else {
|
|
ManagedRegister out_reg = end_jni_conv->CurrentParamRegister();
|
|
__ CreateJObject(out_reg,
|
|
this_offset,
|
|
ManagedRegister::NoRegister(),
|
|
/*null_allowed=*/ false);
|
|
}
|
|
}
|
|
end_jni_conv->Next();
|
|
}
|
|
if (end_jni_conv->IsCurrentParamInRegister()) {
|
|
__ GetCurrentThread(end_jni_conv->CurrentParamRegister());
|
|
__ Call(end_jni_conv->CurrentParamRegister(), Offset(jni_end));
|
|
} else {
|
|
__ GetCurrentThread(end_jni_conv->CurrentParamStackOffset());
|
|
__ CallFromThread(jni_end);
|
|
}
|
|
|
|
// 13. Reload return value
|
|
if (spill_return_value) {
|
|
__ Load(mr_conv->ReturnRegister(), return_save_location, mr_conv->SizeOfReturnValue());
|
|
}
|
|
} // if (!is_critical_native)
|
|
|
|
// 14. Move frame up now we're done with the out arg space.
|
|
// @CriticalNative remove out args together with the frame in RemoveFrame().
|
|
if (LIKELY(!is_critical_native)) {
|
|
__ DecreaseFrameSize(current_out_arg_size);
|
|
current_frame_size -= current_out_arg_size;
|
|
}
|
|
|
|
// 15. Process pending exceptions from JNI call or monitor exit.
|
|
// @CriticalNative methods do not need exception poll in the stub.
|
|
if (LIKELY(!is_critical_native)) {
|
|
__ ExceptionPoll(/* stack_adjust= */ 0);
|
|
}
|
|
|
|
// 16. Remove activation - need to restore callee save registers since the GC may have changed
|
|
// them.
|
|
DCHECK_EQ(jni_asm->cfi().GetCurrentCFAOffset(), static_cast<int>(current_frame_size));
|
|
if (LIKELY(!is_critical_native) || !main_jni_conv->UseTailCall()) {
|
|
// We expect the compiled method to possibly be suspended during its
|
|
// execution, except in the case of a CriticalNative method.
|
|
bool may_suspend = !is_critical_native;
|
|
__ RemoveFrame(current_frame_size, callee_save_regs, may_suspend);
|
|
DCHECK_EQ(jni_asm->cfi().GetCurrentCFAOffset(), static_cast<int>(current_frame_size));
|
|
}
|
|
|
|
// 17. Read barrier slow path for the declaring class in the method for a static call.
|
|
// Skip this for @CriticalNative because we're not passing a `jclass` to the native method.
|
|
if (kUseReadBarrier && is_static && !is_critical_native) {
|
|
__ Bind(jclass_read_barrier_slow_path.get());
|
|
|
|
// We do the marking check after adjusting for outgoing arguments. That ensures that
|
|
// we have space available for at least two params in case we need to pass the read
|
|
// barrier parameters on stack (only x86). But that means we must adjust the CFI
|
|
// offset accordingly as it does not include the outgoing args after `RemoveFrame().
|
|
if (main_out_arg_size != 0) {
|
|
// Note: The DW_CFA_def_cfa_offset emitted by `RemoveFrame()` above
|
|
// is useless when it is immediatelly overridden here but avoiding
|
|
// it adds a lot of code complexity for minimal gain.
|
|
jni_asm->cfi().AdjustCFAOffset(main_out_arg_size);
|
|
}
|
|
|
|
// We enter the slow path with the method register unclobbered.
|
|
method_register = mr_conv->MethodRegister();
|
|
|
|
// Construct slow path for read barrier:
|
|
//
|
|
// Call into the runtime's ReadBarrierJni and have it fix up
|
|
// the object address if it was moved.
|
|
|
|
ThreadOffset<kPointerSize> read_barrier = QUICK_ENTRYPOINT_OFFSET(kPointerSize,
|
|
pReadBarrierJni);
|
|
main_jni_conv->ResetIterator(FrameOffset(main_out_arg_size));
|
|
// Pass the pointer to the method's declaring class as the first argument.
|
|
DCHECK_EQ(ArtMethod::DeclaringClassOffset().SizeValue(), 0u);
|
|
SetNativeParameter(jni_asm.get(), main_jni_conv.get(), method_register);
|
|
main_jni_conv->Next();
|
|
// Pass the current thread as the second argument and call.
|
|
if (main_jni_conv->IsCurrentParamInRegister()) {
|
|
__ GetCurrentThread(main_jni_conv->CurrentParamRegister());
|
|
__ Call(main_jni_conv->CurrentParamRegister(), Offset(read_barrier));
|
|
} else {
|
|
__ GetCurrentThread(main_jni_conv->CurrentParamStackOffset());
|
|
__ CallFromThread(read_barrier);
|
|
}
|
|
if (is_synchronized) {
|
|
// Reload the method pointer in the slow path because it is needed
|
|
// as an argument for the `JniMethodStartSynchronized`.
|
|
__ Load(method_register,
|
|
FrameOffset(main_out_arg_size + mr_conv->MethodStackOffset().SizeValue()),
|
|
static_cast<size_t>(kPointerSize));
|
|
}
|
|
|
|
// Return to main path.
|
|
__ Jump(jclass_read_barrier_return.get());
|
|
|
|
// Undo the CFI offset adjustment at the start of the slow path.
|
|
if (main_out_arg_size != 0) {
|
|
jni_asm->cfi().AdjustCFAOffset(-main_out_arg_size);
|
|
}
|
|
}
|
|
|
|
// 18. Finalize code generation
|
|
__ FinalizeCode();
|
|
size_t cs = __ CodeSize();
|
|
std::vector<uint8_t> managed_code(cs);
|
|
MemoryRegion code(&managed_code[0], managed_code.size());
|
|
__ FinalizeInstructions(code);
|
|
|
|
return JniCompiledMethod(instruction_set,
|
|
std::move(managed_code),
|
|
managed_frame_size,
|
|
main_jni_conv->CoreSpillMask(),
|
|
main_jni_conv->FpSpillMask(),
|
|
ArrayRef<const uint8_t>(*jni_asm->cfi().data()));
|
|
}
|
|
|
|
// Copy a single parameter from the managed to the JNI calling convention.
|
|
template <PointerSize kPointerSize>
|
|
static void CopyParameter(JNIMacroAssembler<kPointerSize>* jni_asm,
|
|
ManagedRuntimeCallingConvention* mr_conv,
|
|
JniCallingConvention* jni_conv) {
|
|
// We spilled all registers, so use stack locations.
|
|
// TODO: Move args in registers for @CriticalNative.
|
|
bool input_in_reg = false; // mr_conv->IsCurrentParamInRegister();
|
|
bool output_in_reg = jni_conv->IsCurrentParamInRegister();
|
|
FrameOffset spilled_reference_offset(0);
|
|
bool null_allowed = false;
|
|
bool ref_param = jni_conv->IsCurrentParamAReference();
|
|
CHECK(!ref_param || mr_conv->IsCurrentParamAReference());
|
|
if (output_in_reg) { // output shouldn't straddle registers and stack
|
|
CHECK(!jni_conv->IsCurrentParamOnStack());
|
|
} else {
|
|
CHECK(jni_conv->IsCurrentParamOnStack());
|
|
}
|
|
// References are spilled to caller's reserved out vreg area.
|
|
if (ref_param) {
|
|
null_allowed = mr_conv->IsCurrentArgPossiblyNull();
|
|
// Compute spilled reference offset. Note that null is spilled but the jobject
|
|
// passed to the native code must be null (not a pointer into the spilled value
|
|
// as with regular references).
|
|
spilled_reference_offset = mr_conv->CurrentParamStackOffset();
|
|
// Check that spilled reference offset is in the spill area in the caller's frame.
|
|
CHECK_GT(spilled_reference_offset.Uint32Value(), mr_conv->GetDisplacement().Uint32Value());
|
|
}
|
|
if (input_in_reg && output_in_reg) {
|
|
ManagedRegister in_reg = mr_conv->CurrentParamRegister();
|
|
ManagedRegister out_reg = jni_conv->CurrentParamRegister();
|
|
if (ref_param) {
|
|
__ CreateJObject(out_reg, spilled_reference_offset, in_reg, null_allowed);
|
|
} else {
|
|
if (!mr_conv->IsCurrentParamOnStack()) {
|
|
// regular non-straddling move
|
|
__ Move(out_reg, in_reg, mr_conv->CurrentParamSize());
|
|
} else {
|
|
UNIMPLEMENTED(FATAL); // we currently don't expect to see this case
|
|
}
|
|
}
|
|
} else if (!input_in_reg && !output_in_reg) {
|
|
FrameOffset out_off = jni_conv->CurrentParamStackOffset();
|
|
if (ref_param) {
|
|
__ CreateJObject(out_off, spilled_reference_offset, null_allowed);
|
|
} else {
|
|
FrameOffset in_off = mr_conv->CurrentParamStackOffset();
|
|
size_t param_size = mr_conv->CurrentParamSize();
|
|
CHECK_EQ(param_size, jni_conv->CurrentParamSize());
|
|
__ Copy(out_off, in_off, param_size);
|
|
}
|
|
} else if (!input_in_reg && output_in_reg) {
|
|
FrameOffset in_off = mr_conv->CurrentParamStackOffset();
|
|
ManagedRegister out_reg = jni_conv->CurrentParamRegister();
|
|
// Check that incoming stack arguments are above the current stack frame.
|
|
CHECK_GT(in_off.Uint32Value(), mr_conv->GetDisplacement().Uint32Value());
|
|
if (ref_param) {
|
|
__ CreateJObject(out_reg,
|
|
spilled_reference_offset,
|
|
ManagedRegister::NoRegister(),
|
|
null_allowed);
|
|
} else {
|
|
size_t param_size = mr_conv->CurrentParamSize();
|
|
CHECK_EQ(param_size, jni_conv->CurrentParamSize());
|
|
__ Load(out_reg, in_off, param_size);
|
|
}
|
|
} else {
|
|
CHECK(input_in_reg && !output_in_reg);
|
|
ManagedRegister in_reg = mr_conv->CurrentParamRegister();
|
|
FrameOffset out_off = jni_conv->CurrentParamStackOffset();
|
|
// Check outgoing argument is within frame part dedicated to out args.
|
|
CHECK_LT(out_off.Uint32Value(), jni_conv->GetDisplacement().Uint32Value());
|
|
if (ref_param) {
|
|
// TODO: recycle value in in_reg rather than reload from spill slot.
|
|
__ CreateJObject(out_off, spilled_reference_offset, null_allowed);
|
|
} else {
|
|
size_t param_size = mr_conv->CurrentParamSize();
|
|
CHECK_EQ(param_size, jni_conv->CurrentParamSize());
|
|
if (!mr_conv->IsCurrentParamOnStack()) {
|
|
// regular non-straddling store
|
|
__ Store(out_off, in_reg, param_size);
|
|
} else {
|
|
// store where input straddles registers and stack
|
|
CHECK_EQ(param_size, 8u);
|
|
FrameOffset in_off = mr_conv->CurrentParamStackOffset();
|
|
__ StoreSpanning(out_off, in_reg, in_off);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template <PointerSize kPointerSize>
|
|
static void SetNativeParameter(JNIMacroAssembler<kPointerSize>* jni_asm,
|
|
JniCallingConvention* jni_conv,
|
|
ManagedRegister in_reg) {
|
|
if (jni_conv->IsCurrentParamOnStack()) {
|
|
FrameOffset dest = jni_conv->CurrentParamStackOffset();
|
|
__ StoreRawPtr(dest, in_reg);
|
|
} else {
|
|
if (!jni_conv->CurrentParamRegister().Equals(in_reg)) {
|
|
__ Move(jni_conv->CurrentParamRegister(), in_reg, jni_conv->CurrentParamSize());
|
|
}
|
|
}
|
|
}
|
|
|
|
JniCompiledMethod ArtQuickJniCompileMethod(const CompilerOptions& compiler_options,
|
|
uint32_t access_flags,
|
|
uint32_t method_idx,
|
|
const DexFile& dex_file) {
|
|
if (Is64BitInstructionSet(compiler_options.GetInstructionSet())) {
|
|
return ArtJniCompileMethodInternal<PointerSize::k64>(
|
|
compiler_options, access_flags, method_idx, dex_file);
|
|
} else {
|
|
return ArtJniCompileMethodInternal<PointerSize::k32>(
|
|
compiler_options, access_flags, method_idx, dex_file);
|
|
}
|
|
}
|
|
|
|
} // namespace art
|