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.
144 lines
5.1 KiB
144 lines
5.1 KiB
/*
|
|
* Copyright (C) 2014 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.
|
|
*/
|
|
|
|
#ifndef ART_COMPILER_OPTIMIZING_GRAPH_CHECKER_H_
|
|
#define ART_COMPILER_OPTIMIZING_GRAPH_CHECKER_H_
|
|
|
|
#include <ostream>
|
|
|
|
#include "base/arena_bit_vector.h"
|
|
#include "base/bit_vector-inl.h"
|
|
#include "base/scoped_arena_allocator.h"
|
|
#include "nodes.h"
|
|
|
|
namespace art {
|
|
|
|
class CodeGenerator;
|
|
|
|
// A control-flow graph visitor performing various checks.
|
|
class GraphChecker : public HGraphDelegateVisitor {
|
|
public:
|
|
explicit GraphChecker(HGraph* graph,
|
|
CodeGenerator* codegen = nullptr,
|
|
const char* dump_prefix = "art::GraphChecker: ")
|
|
: HGraphDelegateVisitor(graph),
|
|
errors_(graph->GetAllocator()->Adapter(kArenaAllocGraphChecker)),
|
|
dump_prefix_(dump_prefix),
|
|
allocator_(graph->GetArenaStack()),
|
|
seen_ids_(&allocator_, graph->GetCurrentInstructionId(), false, kArenaAllocGraphChecker),
|
|
codegen_(codegen) {
|
|
seen_ids_.ClearAllBits();
|
|
}
|
|
|
|
// Check the whole graph. The pass_change parameter indicates whether changes
|
|
// may have occurred during the just executed pass. The default value is
|
|
// conservatively "true" (something may have changed). The last_size parameter
|
|
// and return value pass along the observed graph sizes.
|
|
size_t Run(bool pass_change = true, size_t last_size = 0);
|
|
|
|
void VisitBasicBlock(HBasicBlock* block) override;
|
|
|
|
void VisitInstruction(HInstruction* instruction) override;
|
|
void VisitPhi(HPhi* phi) override;
|
|
|
|
void VisitBinaryOperation(HBinaryOperation* op) override;
|
|
void VisitBooleanNot(HBooleanNot* instruction) override;
|
|
void VisitBoundType(HBoundType* instruction) override;
|
|
void VisitBoundsCheck(HBoundsCheck* check) override;
|
|
void VisitCheckCast(HCheckCast* check) override;
|
|
void VisitCondition(HCondition* op) override;
|
|
void VisitConstant(HConstant* instruction) override;
|
|
void VisitDeoptimize(HDeoptimize* instruction) override;
|
|
void VisitIf(HIf* instruction) override;
|
|
void VisitInstanceOf(HInstanceOf* check) override;
|
|
void VisitInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke) override;
|
|
void VisitLoadException(HLoadException* load) override;
|
|
void VisitNeg(HNeg* instruction) override;
|
|
void VisitPackedSwitch(HPackedSwitch* instruction) override;
|
|
void VisitReturn(HReturn* ret) override;
|
|
void VisitReturnVoid(HReturnVoid* ret) override;
|
|
void VisitSelect(HSelect* instruction) override;
|
|
void VisitTryBoundary(HTryBoundary* try_boundary) override;
|
|
void VisitTypeConversion(HTypeConversion* instruction) override;
|
|
|
|
void VisitVecOperation(HVecOperation* instruction) override;
|
|
|
|
void CheckTypeCheckBitstringInput(HTypeCheckInstruction* check,
|
|
size_t input_pos,
|
|
bool check_value,
|
|
uint32_t expected_value,
|
|
const char* name);
|
|
void HandleTypeCheckInstruction(HTypeCheckInstruction* instruction);
|
|
void HandleLoop(HBasicBlock* loop_header);
|
|
void HandleBooleanInput(HInstruction* instruction, size_t input_index);
|
|
|
|
// Was the last visit of the graph valid?
|
|
bool IsValid() const {
|
|
return errors_.empty();
|
|
}
|
|
|
|
// Get the list of detected errors.
|
|
const ArenaVector<std::string>& GetErrors() const {
|
|
return errors_;
|
|
}
|
|
|
|
// Print detected errors on output stream `os`.
|
|
void Dump(std::ostream& os) const {
|
|
for (size_t i = 0, e = errors_.size(); i < e; ++i) {
|
|
os << dump_prefix_ << errors_[i] << std::endl;
|
|
}
|
|
}
|
|
|
|
// Enable/Disable the reference type info check.
|
|
//
|
|
// Return: the previous status of the check.
|
|
bool SetRefTypeInfoCheckEnabled(bool value = true) {
|
|
bool old_value = check_reference_type_info_;
|
|
check_reference_type_info_ = value;
|
|
return old_value;
|
|
}
|
|
|
|
protected:
|
|
// Report a new error.
|
|
void AddError(const std::string& error) {
|
|
errors_.push_back(error);
|
|
}
|
|
|
|
// The block currently visited.
|
|
HBasicBlock* current_block_ = nullptr;
|
|
// Errors encountered while checking the graph.
|
|
ArenaVector<std::string> errors_;
|
|
|
|
private:
|
|
// String displayed before dumped errors.
|
|
const char* const dump_prefix_;
|
|
ScopedArenaAllocator allocator_;
|
|
ArenaBitVector seen_ids_;
|
|
// Whether to perform the reference type info check for instructions which use or produce
|
|
// object references, e.g. HNewInstance, HLoadClass.
|
|
// The default value is true.
|
|
bool check_reference_type_info_ = true;
|
|
|
|
// Used to access target information.
|
|
CodeGenerator* codegen_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(GraphChecker);
|
|
};
|
|
|
|
} // namespace art
|
|
|
|
#endif // ART_COMPILER_OPTIMIZING_GRAPH_CHECKER_H_
|