mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-12 19:50:09 +00:00
d35a78db57
Fixes #4960 * Switches to using enum classes with an underlying type to avoid undefined behaviour
340 lines
13 KiB
C++
340 lines
13 KiB
C++
// Copyright (c) 2020 Vasyl Teliman
|
|
//
|
|
// 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/transformation_add_synonym.h"
|
|
|
|
#include <utility>
|
|
|
|
#include "source/fuzz/fuzzer_util.h"
|
|
#include "source/fuzz/instruction_descriptor.h"
|
|
|
|
namespace spvtools {
|
|
namespace fuzz {
|
|
|
|
TransformationAddSynonym::TransformationAddSynonym(
|
|
protobufs::TransformationAddSynonym message)
|
|
: message_(std::move(message)) {}
|
|
|
|
TransformationAddSynonym::TransformationAddSynonym(
|
|
uint32_t result_id,
|
|
protobufs::TransformationAddSynonym::SynonymType synonym_type,
|
|
uint32_t synonym_fresh_id,
|
|
const protobufs::InstructionDescriptor& insert_before) {
|
|
message_.set_result_id(result_id);
|
|
message_.set_synonym_type(synonym_type);
|
|
message_.set_synonym_fresh_id(synonym_fresh_id);
|
|
*message_.mutable_insert_before() = insert_before;
|
|
}
|
|
|
|
bool TransformationAddSynonym::IsApplicable(
|
|
opt::IRContext* ir_context,
|
|
const TransformationContext& transformation_context) const {
|
|
assert(protobufs::TransformationAddSynonym::SynonymType_IsValid(
|
|
message_.synonym_type()) &&
|
|
"Synonym type is invalid");
|
|
|
|
// |synonym_fresh_id| must be fresh.
|
|
if (!fuzzerutil::IsFreshId(ir_context, message_.synonym_fresh_id())) {
|
|
return false;
|
|
}
|
|
|
|
// Check that |message_.result_id| is valid.
|
|
auto* synonym = ir_context->get_def_use_mgr()->GetDef(message_.result_id());
|
|
if (!synonym) {
|
|
return false;
|
|
}
|
|
|
|
// Check that we can apply |synonym_type| to |result_id|.
|
|
if (!IsInstructionValid(ir_context, transformation_context, synonym,
|
|
message_.synonym_type())) {
|
|
return false;
|
|
}
|
|
|
|
// Check that |insert_before| is valid.
|
|
auto* insert_before_inst =
|
|
FindInstruction(message_.insert_before(), ir_context);
|
|
if (!insert_before_inst) {
|
|
return false;
|
|
}
|
|
|
|
const auto* insert_before_inst_block =
|
|
ir_context->get_instr_block(insert_before_inst);
|
|
assert(insert_before_inst_block &&
|
|
"|insert_before_inst| must be in some block");
|
|
|
|
if (transformation_context.GetFactManager()->BlockIsDead(
|
|
insert_before_inst_block->id())) {
|
|
// We don't create synonyms in dead blocks.
|
|
return false;
|
|
}
|
|
|
|
// Check that we can insert |message._synonymous_instruction| before
|
|
// |message_.insert_before| instruction. We use OpIAdd to represent some
|
|
// instruction that can produce a synonym.
|
|
if (!fuzzerutil::CanInsertOpcodeBeforeInstruction(spv::Op::OpIAdd,
|
|
insert_before_inst)) {
|
|
return false;
|
|
}
|
|
|
|
// A constant instruction must be present in the module if required.
|
|
if (IsAdditionalConstantRequired(message_.synonym_type()) &&
|
|
MaybeGetConstantId(ir_context, transformation_context) == 0) {
|
|
return false;
|
|
}
|
|
|
|
// Domination rules must be satisfied.
|
|
return fuzzerutil::IdIsAvailableBeforeInstruction(
|
|
ir_context, insert_before_inst, message_.result_id());
|
|
}
|
|
|
|
void TransformationAddSynonym::Apply(
|
|
opt::IRContext* ir_context,
|
|
TransformationContext* transformation_context) const {
|
|
// Add a synonymous instruction.
|
|
auto new_instruction =
|
|
MakeSynonymousInstruction(ir_context, *transformation_context);
|
|
auto new_instruction_ptr = new_instruction.get();
|
|
auto insert_before = FindInstruction(message_.insert_before(), ir_context);
|
|
insert_before->InsertBefore(std::move(new_instruction));
|
|
|
|
fuzzerutil::UpdateModuleIdBound(ir_context, message_.synonym_fresh_id());
|
|
|
|
// Inform the def-use manager about the new instruction and record its basic
|
|
// block.
|
|
ir_context->get_def_use_mgr()->AnalyzeInstDefUse(new_instruction_ptr);
|
|
ir_context->set_instr_block(new_instruction_ptr,
|
|
ir_context->get_instr_block(insert_before));
|
|
|
|
// Propagate PointeeValueIsIrrelevant fact.
|
|
const auto* new_synonym_type = ir_context->get_type_mgr()->GetType(
|
|
fuzzerutil::GetTypeId(ir_context, message_.synonym_fresh_id()));
|
|
assert(new_synonym_type && "New synonym should have a valid type");
|
|
|
|
if (transformation_context->GetFactManager()->PointeeValueIsIrrelevant(
|
|
message_.result_id()) &&
|
|
new_synonym_type->AsPointer()) {
|
|
transformation_context->GetFactManager()->AddFactValueOfPointeeIsIrrelevant(
|
|
message_.synonym_fresh_id());
|
|
}
|
|
|
|
// Mark two ids as synonymous.
|
|
transformation_context->GetFactManager()->AddFactDataSynonym(
|
|
MakeDataDescriptor(message_.result_id(), {}),
|
|
MakeDataDescriptor(message_.synonym_fresh_id(), {}));
|
|
}
|
|
|
|
protobufs::Transformation TransformationAddSynonym::ToMessage() const {
|
|
protobufs::Transformation result;
|
|
*result.mutable_add_synonym() = message_;
|
|
return result;
|
|
}
|
|
|
|
bool TransformationAddSynonym::IsInstructionValid(
|
|
opt::IRContext* ir_context,
|
|
const TransformationContext& transformation_context, opt::Instruction* inst,
|
|
protobufs::TransformationAddSynonym::SynonymType synonym_type) {
|
|
// Instruction must have a result id, type id. We skip OpUndef and
|
|
// OpConstantNull.
|
|
if (!inst || !inst->result_id() || !inst->type_id() ||
|
|
inst->opcode() == spv::Op::OpUndef ||
|
|
inst->opcode() == spv::Op::OpConstantNull) {
|
|
return false;
|
|
}
|
|
|
|
if (!fuzzerutil::CanMakeSynonymOf(ir_context, transformation_context,
|
|
*inst)) {
|
|
return false;
|
|
}
|
|
|
|
switch (synonym_type) {
|
|
case protobufs::TransformationAddSynonym::ADD_ZERO:
|
|
case protobufs::TransformationAddSynonym::SUB_ZERO:
|
|
case protobufs::TransformationAddSynonym::MUL_ONE: {
|
|
// The instruction must be either scalar or vector of integers or floats.
|
|
const auto* type = ir_context->get_type_mgr()->GetType(inst->type_id());
|
|
assert(type && "Instruction's result id is invalid");
|
|
|
|
if (const auto* vector = type->AsVector()) {
|
|
return vector->element_type()->AsInteger() ||
|
|
vector->element_type()->AsFloat();
|
|
}
|
|
|
|
return type->AsInteger() || type->AsFloat();
|
|
}
|
|
case protobufs::TransformationAddSynonym::BITWISE_OR:
|
|
case protobufs::TransformationAddSynonym::BITWISE_XOR: {
|
|
// The instruction must be either an integer or a vector of integers.
|
|
const auto* type = ir_context->get_type_mgr()->GetType(inst->type_id());
|
|
assert(type && "Instruction's result id is invalid");
|
|
|
|
if (const auto* vector = type->AsVector()) {
|
|
return vector->element_type()->AsInteger();
|
|
}
|
|
|
|
return type->AsInteger();
|
|
}
|
|
case protobufs::TransformationAddSynonym::COPY_OBJECT:
|
|
// All checks for OpCopyObject are handled by
|
|
// fuzzerutil::CanMakeSynonymOf.
|
|
return true;
|
|
case protobufs::TransformationAddSynonym::LOGICAL_AND:
|
|
case protobufs::TransformationAddSynonym::LOGICAL_OR: {
|
|
// The instruction must be either a scalar or a vector of booleans.
|
|
const auto* type = ir_context->get_type_mgr()->GetType(inst->type_id());
|
|
assert(type && "Instruction's result id is invalid");
|
|
return (type->AsVector() && type->AsVector()->element_type()->AsBool()) ||
|
|
type->AsBool();
|
|
}
|
|
default:
|
|
assert(false && "Synonym type is not supported");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<opt::Instruction>
|
|
TransformationAddSynonym::MakeSynonymousInstruction(
|
|
opt::IRContext* ir_context,
|
|
const TransformationContext& transformation_context) const {
|
|
auto synonym_type_id =
|
|
fuzzerutil::GetTypeId(ir_context, message_.result_id());
|
|
assert(synonym_type_id && "Synonym has invalid type id");
|
|
auto opcode = spv::Op::OpNop;
|
|
const auto* synonym_type =
|
|
ir_context->get_type_mgr()->GetType(synonym_type_id);
|
|
assert(synonym_type && "Synonym has invalid type");
|
|
|
|
auto is_integral = (synonym_type->AsVector() &&
|
|
synonym_type->AsVector()->element_type()->AsInteger()) ||
|
|
synonym_type->AsInteger();
|
|
|
|
switch (message_.synonym_type()) {
|
|
case protobufs::TransformationAddSynonym::SUB_ZERO:
|
|
opcode = is_integral ? spv::Op::OpISub : spv::Op::OpFSub;
|
|
break;
|
|
case protobufs::TransformationAddSynonym::MUL_ONE:
|
|
opcode = is_integral ? spv::Op::OpIMul : spv::Op::OpFMul;
|
|
break;
|
|
case protobufs::TransformationAddSynonym::ADD_ZERO:
|
|
opcode = is_integral ? spv::Op::OpIAdd : spv::Op::OpFAdd;
|
|
break;
|
|
case protobufs::TransformationAddSynonym::LOGICAL_OR:
|
|
opcode = spv::Op::OpLogicalOr;
|
|
break;
|
|
case protobufs::TransformationAddSynonym::LOGICAL_AND:
|
|
opcode = spv::Op::OpLogicalAnd;
|
|
break;
|
|
case protobufs::TransformationAddSynonym::BITWISE_OR:
|
|
opcode = spv::Op::OpBitwiseOr;
|
|
break;
|
|
case protobufs::TransformationAddSynonym::BITWISE_XOR:
|
|
opcode = spv::Op::OpBitwiseXor;
|
|
break;
|
|
|
|
case protobufs::TransformationAddSynonym::COPY_OBJECT:
|
|
return MakeUnique<opt::Instruction>(
|
|
ir_context, spv::Op::OpCopyObject, synonym_type_id,
|
|
message_.synonym_fresh_id(),
|
|
opt::Instruction::OperandList{
|
|
{SPV_OPERAND_TYPE_ID, {message_.result_id()}}});
|
|
|
|
default:
|
|
assert(false && "Unhandled synonym type");
|
|
return nullptr;
|
|
}
|
|
|
|
return MakeUnique<opt::Instruction>(
|
|
ir_context, opcode, synonym_type_id, message_.synonym_fresh_id(),
|
|
opt::Instruction::OperandList{
|
|
{SPV_OPERAND_TYPE_ID, {message_.result_id()}},
|
|
{SPV_OPERAND_TYPE_ID,
|
|
{MaybeGetConstantId(ir_context, transformation_context)}}});
|
|
}
|
|
|
|
uint32_t TransformationAddSynonym::MaybeGetConstantId(
|
|
opt::IRContext* ir_context,
|
|
const TransformationContext& transformation_context) const {
|
|
assert(IsAdditionalConstantRequired(message_.synonym_type()) &&
|
|
"Synonym type doesn't require an additional constant");
|
|
|
|
auto synonym_type_id =
|
|
fuzzerutil::GetTypeId(ir_context, message_.result_id());
|
|
assert(synonym_type_id && "Synonym has invalid type id");
|
|
|
|
switch (message_.synonym_type()) {
|
|
case protobufs::TransformationAddSynonym::ADD_ZERO:
|
|
case protobufs::TransformationAddSynonym::SUB_ZERO:
|
|
case protobufs::TransformationAddSynonym::LOGICAL_OR:
|
|
case protobufs::TransformationAddSynonym::BITWISE_OR:
|
|
case protobufs::TransformationAddSynonym::BITWISE_XOR:
|
|
return fuzzerutil::MaybeGetZeroConstant(
|
|
ir_context, transformation_context, synonym_type_id, false);
|
|
case protobufs::TransformationAddSynonym::MUL_ONE:
|
|
case protobufs::TransformationAddSynonym::LOGICAL_AND: {
|
|
auto synonym_type = ir_context->get_type_mgr()->GetType(synonym_type_id);
|
|
assert(synonym_type && "Synonym has invalid type");
|
|
|
|
if (const auto* vector = synonym_type->AsVector()) {
|
|
auto element_type_id =
|
|
ir_context->get_type_mgr()->GetId(vector->element_type());
|
|
assert(element_type_id && "Vector's element type is invalid");
|
|
|
|
auto one_word =
|
|
vector->element_type()->AsFloat() ? fuzzerutil::FloatToWord(1) : 1u;
|
|
if (auto scalar_one_id = fuzzerutil::MaybeGetScalarConstant(
|
|
ir_context, transformation_context, {one_word}, element_type_id,
|
|
false)) {
|
|
return fuzzerutil::MaybeGetCompositeConstant(
|
|
ir_context, transformation_context,
|
|
std::vector<uint32_t>(vector->element_count(), scalar_one_id),
|
|
synonym_type_id, false);
|
|
}
|
|
|
|
return 0;
|
|
} else {
|
|
return fuzzerutil::MaybeGetScalarConstant(
|
|
ir_context, transformation_context,
|
|
{synonym_type->AsFloat() ? fuzzerutil::FloatToWord(1) : 1u},
|
|
synonym_type_id, false);
|
|
}
|
|
}
|
|
default:
|
|
// The assertion at the beginning of the function will fail in the debug
|
|
// mode.
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
bool TransformationAddSynonym::IsAdditionalConstantRequired(
|
|
protobufs::TransformationAddSynonym::SynonymType synonym_type) {
|
|
switch (synonym_type) {
|
|
case protobufs::TransformationAddSynonym::ADD_ZERO:
|
|
case protobufs::TransformationAddSynonym::SUB_ZERO:
|
|
case protobufs::TransformationAddSynonym::LOGICAL_OR:
|
|
case protobufs::TransformationAddSynonym::MUL_ONE:
|
|
case protobufs::TransformationAddSynonym::LOGICAL_AND:
|
|
case protobufs::TransformationAddSynonym::BITWISE_OR:
|
|
case protobufs::TransformationAddSynonym::BITWISE_XOR:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
std::unordered_set<uint32_t> TransformationAddSynonym::GetFreshIds() const {
|
|
return {message_.synonym_fresh_id()};
|
|
}
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|