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/*
* Copyright (C) 2012 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 "class_linker.h"
#include "compilation_unit.h"
#include "compiled_method.h"
#include "compiler.h"
#include "compiler_llvm.h"
#include "ir_builder.h"
#include "logging.h"
#include "oat_compilation_unit.h"
#include "object.h"
#include "runtime.h"
#include "utils_llvm.h"
#include <llvm/DerivedTypes.h>
#include <llvm/Function.h>
#include <llvm/Type.h>
namespace art {
namespace compiler_llvm {
JniCompiler::JniCompiler(CompilationUnit* cunit,
Compiler const& compiler,
OatCompilationUnit* oat_compilation_unit)
: cunit_(cunit), compiler_(&compiler), module_(cunit_->GetModule()),
context_(cunit_->GetLLVMContext()), irb_(*cunit_->GetIRBuilder()),
oat_compilation_unit_(oat_compilation_unit),
access_flags_(oat_compilation_unit->access_flags_),
method_idx_(oat_compilation_unit->method_idx_),
class_linker_(oat_compilation_unit->class_linker_),
class_loader_(oat_compilation_unit->class_loader_),
dex_cache_(oat_compilation_unit->dex_cache_),
dex_file_(oat_compilation_unit->dex_file_),
method_(dex_cache_->GetResolvedMethod(method_idx_)) {
// Check: Ensure that the method is resolved
CHECK_NE(method_, static_cast<art::Method*>(NULL));
// Check: Ensure that JNI compiler will only get "native" method
CHECK((access_flags_ & kAccNative) != 0);
}
CompiledMethod* JniCompiler::Compile() {
CreateFunction();
return new CompiledMethod(cunit_->GetInstructionSet(), func_);
}
void JniCompiler::CreateFunction() {
// LLVM function name
std::string func_name(LLVMLongName(method_));
// Get function type
llvm::FunctionType* func_type =
GetFunctionType(method_idx_, method_->IsStatic());
// Create function
func_ = llvm::Function::Create(func_type, llvm::Function::ExternalLinkage,
func_name, module_);
}
llvm::FunctionType* JniCompiler::GetFunctionType(uint32_t method_idx,
bool is_static) {
// Get method signature
DexFile::MethodId const& method_id = dex_file_->GetMethodId(method_idx);
uint32_t shorty_size;
char const* shorty = dex_file_->GetMethodShorty(method_id, &shorty_size);
CHECK_GE(shorty_size, 1u);
// Get return type
llvm::Type* ret_type = irb_.getJType(shorty[0], kAccurate);
// Get argument type
std::vector<llvm::Type*> args_type;
args_type.push_back(irb_.getJObjectTy()); // method object pointer
if (!is_static) {
args_type.push_back(irb_.getJType('L', kAccurate)); // "this" object pointer
}
for (uint32_t i = 1; i < shorty_size; ++i) {
args_type.push_back(irb_.getJType(shorty[i], kAccurate));
}
return llvm::FunctionType::get(ret_type, args_type, false);
}
} // namespace compiler_llvm
} // namespace art
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