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// Copyright (c) 2019 Google LLC
//
// 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_load.h"
#include "gtest/gtest.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/instruction_descriptor.h"
#include "test/fuzz/fuzz_test_util.h"
namespace spvtools {
namespace fuzz {
namespace {
TEST(TransformationLoadTest, BasicTest) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypeFloat 32
%8 = OpTypeStruct %6 %7
%9 = OpTypePointer Function %8
%10 = OpTypeFunction %6 %9
%14 = OpConstant %6 0
%15 = OpTypePointer Function %6
%51 = OpTypePointer Private %6
%21 = OpConstant %6 2
%23 = OpConstant %6 1
%24 = OpConstant %7 1
%25 = OpTypePointer Function %7
%50 = OpTypePointer Private %7
%34 = OpTypeBool
%35 = OpConstantFalse %34
%60 = OpConstantNull %50
%61 = OpUndef %51
%52 = OpVariable %50 Private
%53 = OpVariable %51 Private
%4 = OpFunction %2 None %3
%5 = OpLabel
%20 = OpVariable %9 Function
%27 = OpVariable %9 Function ; irrelevant
%22 = OpAccessChain %15 %20 %14
%44 = OpCopyObject %9 %20
%26 = OpAccessChain %25 %20 %23
%29 = OpFunctionCall %6 %12 %27
%30 = OpAccessChain %15 %20 %14
%45 = OpCopyObject %15 %30
%33 = OpAccessChain %15 %20 %14
OpSelectionMerge %37 None
OpBranchConditional %35 %36 %37
%36 = OpLabel
%38 = OpAccessChain %15 %20 %14
%40 = OpAccessChain %15 %20 %14
%43 = OpAccessChain %15 %20 %14
OpBranch %37
%37 = OpLabel
OpReturn
OpFunctionEnd
%12 = OpFunction %6 None %10
%11 = OpFunctionParameter %9 ; irrelevant
%13 = OpLabel
%46 = OpCopyObject %9 %11 ; irrelevant
%16 = OpAccessChain %15 %11 %14 ; irrelevant
OpReturnValue %21
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_4;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
transformation_context.GetFactManager()->AddFactValueOfPointeeIsIrrelevant(
27);
transformation_context.GetFactManager()->AddFactValueOfPointeeIsIrrelevant(
11);
transformation_context.GetFactManager()->AddFactValueOfPointeeIsIrrelevant(
46);
transformation_context.GetFactManager()->AddFactValueOfPointeeIsIrrelevant(
16);
transformation_context.GetFactManager()->AddFactValueOfPointeeIsIrrelevant(
52);
transformation_context.GetFactManager()->AddFactBlockIsDead(36);
// Variables with pointee types:
// 52 - ptr_to(7)
// 53 - ptr_to(6)
// 20 - ptr_to(8)
// 27 - ptr_to(8) - irrelevant
// Access chains with pointee type:
// 22 - ptr_to(6)
// 26 - ptr_to(6)
// 30 - ptr_to(6)
// 33 - ptr_to(6)
// 38 - ptr_to(6)
// 40 - ptr_to(6)
// 43 - ptr_to(6)
// 16 - ptr_to(6) - irrelevant
// Copied object with pointee type:
// 44 - ptr_to(8)
// 45 - ptr_to(6)
// 46 - ptr_to(8) - irrelevant
// Function parameters with pointee type:
// 11 - ptr_to(8) - irrelevant
// Pointers that cannot be used:
// 60 - null
// 61 - undefined
// Bad: id is not fresh
ASSERT_FALSE(TransformationLoad(
33, 33, MakeInstructionDescriptor(38, SpvOpAccessChain, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: attempt to load from 11 from outside its function
ASSERT_FALSE(TransformationLoad(
100, 11, MakeInstructionDescriptor(38, SpvOpAccessChain, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: pointer is not available
ASSERT_FALSE(TransformationLoad(
100, 33, MakeInstructionDescriptor(45, SpvOpCopyObject, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: attempt to insert before OpVariable
ASSERT_FALSE(TransformationLoad(
100, 27, MakeInstructionDescriptor(27, SpvOpVariable, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: pointer id does not exist
ASSERT_FALSE(
TransformationLoad(100, 1000,
MakeInstructionDescriptor(38, SpvOpAccessChain, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: pointer id exists but does not have a type
ASSERT_FALSE(TransformationLoad(
100, 5, MakeInstructionDescriptor(38, SpvOpAccessChain, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: pointer id exists and has a type, but is not a pointer
ASSERT_FALSE(TransformationLoad(
100, 24, MakeInstructionDescriptor(38, SpvOpAccessChain, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: attempt to load from null pointer
ASSERT_FALSE(TransformationLoad(
100, 60, MakeInstructionDescriptor(38, SpvOpAccessChain, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: attempt to load from undefined pointer
ASSERT_FALSE(TransformationLoad(
100, 61, MakeInstructionDescriptor(38, SpvOpAccessChain, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: %40 is not available at the program point
ASSERT_FALSE(
TransformationLoad(100, 40, MakeInstructionDescriptor(37, SpvOpReturn, 0))
.IsApplicable(context.get(), transformation_context));
// Bad: The described instruction does not exist
ASSERT_FALSE(TransformationLoad(
100, 33, MakeInstructionDescriptor(1000, SpvOpReturn, 0))
.IsApplicable(context.get(), transformation_context));
{
TransformationLoad transformation(
100, 33, MakeInstructionDescriptor(38, SpvOpAccessChain, 0));
ASSERT_TRUE(
transformation.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(
context.get(), validator_options, kConsoleMessageConsumer));
}
{
TransformationLoad transformation(
101, 46, MakeInstructionDescriptor(16, SpvOpReturnValue, 0));
ASSERT_TRUE(
transformation.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(
context.get(), validator_options, kConsoleMessageConsumer));
}
{
TransformationLoad transformation(
102, 16, MakeInstructionDescriptor(16, SpvOpReturnValue, 0));
ASSERT_TRUE(
transformation.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(
context.get(), validator_options, kConsoleMessageConsumer));
}
{
TransformationLoad transformation(
103, 40, MakeInstructionDescriptor(43, SpvOpAccessChain, 0));
ASSERT_TRUE(
transformation.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(
context.get(), validator_options, kConsoleMessageConsumer));
}
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypeFloat 32
%8 = OpTypeStruct %6 %7
%9 = OpTypePointer Function %8
%10 = OpTypeFunction %6 %9
%14 = OpConstant %6 0
%15 = OpTypePointer Function %6
%51 = OpTypePointer Private %6
%21 = OpConstant %6 2
%23 = OpConstant %6 1
%24 = OpConstant %7 1
%25 = OpTypePointer Function %7
%50 = OpTypePointer Private %7
%34 = OpTypeBool
%35 = OpConstantFalse %34
%60 = OpConstantNull %50
%61 = OpUndef %51
%52 = OpVariable %50 Private
%53 = OpVariable %51 Private
%4 = OpFunction %2 None %3
%5 = OpLabel
%20 = OpVariable %9 Function
%27 = OpVariable %9 Function ; irrelevant
%22 = OpAccessChain %15 %20 %14
%44 = OpCopyObject %9 %20
%26 = OpAccessChain %25 %20 %23
%29 = OpFunctionCall %6 %12 %27
%30 = OpAccessChain %15 %20 %14
%45 = OpCopyObject %15 %30
%33 = OpAccessChain %15 %20 %14
OpSelectionMerge %37 None
OpBranchConditional %35 %36 %37
%36 = OpLabel
%100 = OpLoad %6 %33
%38 = OpAccessChain %15 %20 %14
%40 = OpAccessChain %15 %20 %14
%103 = OpLoad %6 %40
%43 = OpAccessChain %15 %20 %14
OpBranch %37
%37 = OpLabel
OpReturn
OpFunctionEnd
%12 = OpFunction %6 None %10
%11 = OpFunctionParameter %9 ; irrelevant
%13 = OpLabel
%46 = OpCopyObject %9 %11 ; irrelevant
%16 = OpAccessChain %15 %11 %14 ; irrelevant
%101 = OpLoad %8 %46
%102 = OpLoad %6 %16
OpReturnValue %21
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
} // namespace
} // namespace fuzz
} // namespace spvtools
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