mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-25 13:00:04 +00:00
d35a78db57
Fixes #4960 * Switches to using enum classes with an underlying type to avoid undefined behaviour
104 lines
4.1 KiB
C++
104 lines
4.1 KiB
C++
// Copyright (c) 2020 André Perez Maselco
|
|
//
|
|
// 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 "source/fuzz/fuzzer_pass_inline_functions.h"
|
|
|
|
#include "source/fuzz/fuzzer_util.h"
|
|
#include "source/fuzz/instruction_descriptor.h"
|
|
#include "source/fuzz/transformation_inline_function.h"
|
|
#include "source/fuzz/transformation_split_block.h"
|
|
|
|
namespace spvtools {
|
|
namespace fuzz {
|
|
|
|
FuzzerPassInlineFunctions::FuzzerPassInlineFunctions(
|
|
opt::IRContext* ir_context, TransformationContext* transformation_context,
|
|
FuzzerContext* fuzzer_context,
|
|
protobufs::TransformationSequence* transformations,
|
|
bool ignore_inapplicable_transformations)
|
|
: FuzzerPass(ir_context, transformation_context, fuzzer_context,
|
|
transformations, ignore_inapplicable_transformations) {}
|
|
|
|
void FuzzerPassInlineFunctions::Apply() {
|
|
// |function_call_instructions| are the instructions that will be inlined.
|
|
// First, they will be collected and then do the inlining in another loop.
|
|
// This avoids changing the module while it is being inspected.
|
|
std::vector<opt::Instruction*> function_call_instructions;
|
|
|
|
for (auto& function : *GetIRContext()->module()) {
|
|
for (auto& block : function) {
|
|
for (auto& instruction : block) {
|
|
if (!GetFuzzerContext()->ChoosePercentage(
|
|
GetFuzzerContext()->GetChanceOfInliningFunction())) {
|
|
continue;
|
|
}
|
|
|
|
// |instruction| must be suitable for inlining.
|
|
if (!TransformationInlineFunction::IsSuitableForInlining(
|
|
GetIRContext(), &instruction)) {
|
|
continue;
|
|
}
|
|
|
|
function_call_instructions.push_back(&instruction);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Once the function calls have been collected, it's time to actually create
|
|
// and apply the inlining transformations.
|
|
for (auto& function_call_instruction : function_call_instructions) {
|
|
// If |function_call_instruction| is not the penultimate instruction in its
|
|
// block or its block termination instruction is not OpBranch, then try to
|
|
// split |function_call_block| such that the conditions are met.
|
|
auto* function_call_block =
|
|
GetIRContext()->get_instr_block(function_call_instruction);
|
|
if ((function_call_instruction != &*--function_call_block->tail() ||
|
|
function_call_block->terminator()->opcode() != spv::Op::OpBranch) &&
|
|
!MaybeApplyTransformation(TransformationSplitBlock(
|
|
MakeInstructionDescriptor(GetIRContext(),
|
|
function_call_instruction->NextNode()),
|
|
GetFuzzerContext()->GetFreshId()))) {
|
|
continue;
|
|
}
|
|
|
|
auto* called_function = fuzzerutil::FindFunction(
|
|
GetIRContext(), function_call_instruction->GetSingleWordInOperand(0));
|
|
|
|
// Mapping the called function instructions.
|
|
std::map<uint32_t, uint32_t> result_id_map;
|
|
for (auto& called_function_block : *called_function) {
|
|
// The called function entry block label will not be inlined.
|
|
if (&called_function_block != &*called_function->entry()) {
|
|
result_id_map[called_function_block.GetLabelInst()->result_id()] =
|
|
GetFuzzerContext()->GetFreshId();
|
|
}
|
|
|
|
for (auto& instruction_to_inline : called_function_block) {
|
|
// The instructions are mapped to fresh ids.
|
|
if (instruction_to_inline.HasResultId()) {
|
|
result_id_map[instruction_to_inline.result_id()] =
|
|
GetFuzzerContext()->GetFreshId();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Applies the inline function transformation.
|
|
ApplyTransformation(TransformationInlineFunction(
|
|
function_call_instruction->result_id(), result_id_map));
|
|
}
|
|
}
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|