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/*
* 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 "compiled_method.h"
namespace art {
CompiledCode::CompiledCode(InstructionSet instruction_set, const std::vector<uint8_t>& code)
: instruction_set_(instruction_set), code_(code) {
CHECK_NE(code.size(), 0U);
}
CompiledCode::CompiledCode(InstructionSet instruction_set,
const std::string& elf_object,
const std::string& symbol)
: instruction_set_(instruction_set), symbol_(symbol) {
CHECK_NE(elf_object.size(), 0U);
CHECK_NE(symbol.size(), 0U);
// TODO: we shouldn't just shove ELF objects in as "code" but
// change to have different kinds of compiled methods. This is
// being deferred until we work on hybrid execution or at least
// until we work on batch compilation.
code_.resize(elf_object.size());
memcpy(&code_[0], &elf_object[0], elf_object.size());
}
uint32_t CompiledCode::AlignCode(uint32_t offset) const {
return AlignCode(offset, instruction_set_);
}
uint32_t CompiledCode::AlignCode(uint32_t offset, InstructionSet instruction_set) {
switch (instruction_set) {
case kArm:
case kThumb2:
return RoundUp(offset, kArmAlignment);
case kMips:
return RoundUp(offset, kMipsAlignment);
case kX86:
return RoundUp(offset, kX86Alignment);
default:
LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
return 0;
}
}
size_t CompiledCode::CodeDelta() const {
switch (instruction_set_) {
case kArm:
case kMips:
case kX86:
return 0;
case kThumb2: {
// +1 to set the low-order bit so a BLX will switch to Thumb mode
return 1;
}
default:
LOG(FATAL) << "Unknown InstructionSet: " << instruction_set_;
return 0;
}
}
const void* CompiledCode::CodePointer(const void* code_pointer,
InstructionSet instruction_set) {
switch (instruction_set) {
case kArm:
case kMips:
case kX86:
return code_pointer;
case kThumb2: {
uintptr_t address = reinterpret_cast<uintptr_t>(code_pointer);
// Set the low-order bit so a BLX will switch to Thumb mode
address |= 0x1;
return reinterpret_cast<const void*>(address);
}
default:
LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
return NULL;
}
}
#if defined(ART_USE_PORTABLE_COMPILER)
const std::string& CompiledCode::GetSymbol() const {
CHECK_NE(0U, symbol_.size());
return symbol_;
}
const std::vector<uint32_t>& CompiledCode::GetOatdataOffsetsToCompliledCodeOffset() const {
CHECK_NE(0U, oatdata_offsets_to_compiled_code_offset_.size()) << symbol_;
return oatdata_offsets_to_compiled_code_offset_;
}
void CompiledCode::AddOatdataOffsetToCompliledCodeOffset(uint32_t offset) {
oatdata_offsets_to_compiled_code_offset_.push_back(offset);
}
#endif
CompiledMethod::CompiledMethod(InstructionSet instruction_set,
const std::vector<uint8_t>& code,
const size_t frame_size_in_bytes,
const uint32_t core_spill_mask,
const uint32_t fp_spill_mask,
const std::vector<uint32_t>& mapping_table,
const std::vector<uint16_t>& vmap_table,
const std::vector<uint8_t>& native_gc_map)
: CompiledCode(instruction_set, code), frame_size_in_bytes_(frame_size_in_bytes),
core_spill_mask_(core_spill_mask), fp_spill_mask_(fp_spill_mask),
gc_map_(native_gc_map) {
DCHECK_EQ(vmap_table.size(),
static_cast<uint32_t>(__builtin_popcount(core_spill_mask)
+ __builtin_popcount(fp_spill_mask)));
CHECK_LE(vmap_table.size(), (1U << 16) - 1); // length must fit in 2^16-1
std::vector<uint32_t> length_prefixed_mapping_table;
length_prefixed_mapping_table.push_back(mapping_table.size());
length_prefixed_mapping_table.insert(length_prefixed_mapping_table.end(),
mapping_table.begin(),
mapping_table.end());
DCHECK_EQ(mapping_table.size() + 1, length_prefixed_mapping_table.size());
std::vector<uint16_t> length_prefixed_vmap_table;
length_prefixed_vmap_table.push_back(vmap_table.size());
length_prefixed_vmap_table.insert(length_prefixed_vmap_table.end(),
vmap_table.begin(),
vmap_table.end());
DCHECK_EQ(vmap_table.size() + 1, length_prefixed_vmap_table.size());
DCHECK_EQ(vmap_table.size(), length_prefixed_vmap_table[0]);
mapping_table_ = length_prefixed_mapping_table;
vmap_table_ = length_prefixed_vmap_table;
DCHECK_EQ(vmap_table_[0], static_cast<uint32_t>(__builtin_popcount(core_spill_mask) + __builtin_popcount(fp_spill_mask)));
}
CompiledMethod::CompiledMethod(InstructionSet instruction_set,
const std::vector<uint8_t>& code,
const size_t frame_size_in_bytes,
const uint32_t core_spill_mask,
const uint32_t fp_spill_mask)
: CompiledCode(instruction_set, code),
frame_size_in_bytes_(frame_size_in_bytes),
core_spill_mask_(core_spill_mask), fp_spill_mask_(fp_spill_mask) {}
} // namespace art
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