mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-10-19 19:40:13 +00:00
fe10239f92
This change adds fuzzer passes that sprinkle loads and stores into a module at random, with stores restricted to occur in either dead blocks, or to use pointers for which it is known that the pointee value does not influence the module's overall behaviour. The change also generalises the VariableValueIsArbitrary fact to PointeeValueIsIrrelevant, to allow stores through access chains or object copies of variables whose values are known to be irrelevant. The change includes some other minor refactorings.
286 lines
10 KiB
C++
286 lines
10 KiB
C++
// Copyright (c) 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "source/fuzz/transformation_add_global_variable.h"
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#include "test/fuzz/fuzz_test_util.h"
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namespace spvtools {
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namespace fuzz {
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namespace {
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TEST(TransformationAddGlobalVariableTest, BasicTest) {
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std::string shader = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %4 "main"
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OpExecutionMode %4 OriginUpperLeft
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OpSource ESSL 310
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%2 = OpTypeVoid
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%3 = OpTypeFunction %2
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%6 = OpTypeFloat 32
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%7 = OpTypeInt 32 1
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%8 = OpTypeVector %6 2
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%9 = OpTypePointer Function %6
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%10 = OpTypePointer Private %6
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%20 = OpTypePointer Uniform %6
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%11 = OpTypePointer Function %7
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%12 = OpTypePointer Private %7
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%13 = OpTypePointer Private %8
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%14 = OpVariable %10 Private
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%15 = OpVariable %20 Uniform
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%16 = OpConstant %7 1
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%17 = OpTypePointer Private %10
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%18 = OpTypeBool
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%19 = OpTypePointer Private %18
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%21 = OpConstantTrue %18
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%22 = OpConstantFalse %18
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%4 = OpFunction %2 None %3
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%5 = OpLabel
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OpReturn
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OpFunctionEnd
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)";
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const auto env = SPV_ENV_UNIVERSAL_1_3;
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const auto consumer = nullptr;
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const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
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ASSERT_TRUE(IsValid(env, context.get()));
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FactManager fact_manager;
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// Id already in use
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ASSERT_FALSE(TransformationAddGlobalVariable(4, 10, 0, true)
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.IsApplicable(context.get(), fact_manager));
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// %1 is not a type
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ASSERT_FALSE(TransformationAddGlobalVariable(100, 1, 0, false)
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.IsApplicable(context.get(), fact_manager));
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// %7 is not a pointer type
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ASSERT_FALSE(TransformationAddGlobalVariable(100, 7, 0, true)
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.IsApplicable(context.get(), fact_manager));
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// %9 does not have Private storage class
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ASSERT_FALSE(TransformationAddGlobalVariable(100, 9, 0, false)
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.IsApplicable(context.get(), fact_manager));
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// %15 does not have Private storage class
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ASSERT_FALSE(TransformationAddGlobalVariable(100, 15, 0, true)
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.IsApplicable(context.get(), fact_manager));
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// %10 is a pointer to float, while %16 is an int constant
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ASSERT_FALSE(TransformationAddGlobalVariable(100, 10, 16, false)
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.IsApplicable(context.get(), fact_manager));
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// %10 is a Private pointer to float, while %15 is a variable with type
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// Uniform float pointer
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ASSERT_FALSE(TransformationAddGlobalVariable(100, 10, 15, true)
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.IsApplicable(context.get(), fact_manager));
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// %12 is a Private pointer to int, while %10 is a variable with type
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// Private float pointer
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ASSERT_FALSE(TransformationAddGlobalVariable(100, 12, 10, false)
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.IsApplicable(context.get(), fact_manager));
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// %10 is pointer-to-float, and %14 has type pointer-to-float; that's not OK
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// since the initializer's type should be the *pointee* type.
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ASSERT_FALSE(TransformationAddGlobalVariable(104, 10, 14, true)
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.IsApplicable(context.get(), fact_manager));
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// This would work in principle, but logical addressing does not allow
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// a pointer to a pointer.
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ASSERT_FALSE(TransformationAddGlobalVariable(104, 17, 14, false)
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.IsApplicable(context.get(), fact_manager));
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TransformationAddGlobalVariable transformations[] = {
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// %100 = OpVariable %12 Private
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TransformationAddGlobalVariable(100, 12, 0, true),
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// %101 = OpVariable %10 Private
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TransformationAddGlobalVariable(101, 10, 0, false),
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// %102 = OpVariable %13 Private
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TransformationAddGlobalVariable(102, 13, 0, true),
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// %103 = OpVariable %12 Private %16
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TransformationAddGlobalVariable(103, 12, 16, false),
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// %104 = OpVariable %19 Private %21
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TransformationAddGlobalVariable(104, 19, 21, true),
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// %105 = OpVariable %19 Private %22
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TransformationAddGlobalVariable(105, 19, 22, false)};
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for (auto& transformation : transformations) {
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ASSERT_TRUE(transformation.IsApplicable(context.get(), fact_manager));
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transformation.Apply(context.get(), &fact_manager);
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}
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ASSERT_TRUE(fact_manager.PointeeValueIsIrrelevant(100));
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ASSERT_TRUE(fact_manager.PointeeValueIsIrrelevant(102));
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ASSERT_TRUE(fact_manager.PointeeValueIsIrrelevant(104));
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ASSERT_FALSE(fact_manager.PointeeValueIsIrrelevant(101));
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ASSERT_FALSE(fact_manager.PointeeValueIsIrrelevant(103));
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ASSERT_FALSE(fact_manager.PointeeValueIsIrrelevant(105));
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ASSERT_TRUE(IsValid(env, context.get()));
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std::string after_transformation = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %4 "main"
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OpExecutionMode %4 OriginUpperLeft
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OpSource ESSL 310
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%2 = OpTypeVoid
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%3 = OpTypeFunction %2
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%6 = OpTypeFloat 32
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%7 = OpTypeInt 32 1
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%8 = OpTypeVector %6 2
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%9 = OpTypePointer Function %6
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%10 = OpTypePointer Private %6
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%20 = OpTypePointer Uniform %6
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%11 = OpTypePointer Function %7
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%12 = OpTypePointer Private %7
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%13 = OpTypePointer Private %8
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%14 = OpVariable %10 Private
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%15 = OpVariable %20 Uniform
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%16 = OpConstant %7 1
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%17 = OpTypePointer Private %10
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%18 = OpTypeBool
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%19 = OpTypePointer Private %18
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%21 = OpConstantTrue %18
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%22 = OpConstantFalse %18
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%100 = OpVariable %12 Private
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%101 = OpVariable %10 Private
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%102 = OpVariable %13 Private
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%103 = OpVariable %12 Private %16
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%104 = OpVariable %19 Private %21
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%105 = OpVariable %19 Private %22
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%4 = OpFunction %2 None %3
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%5 = OpLabel
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OpReturn
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OpFunctionEnd
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)";
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ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
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}
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TEST(TransformationAddGlobalVariableTest, TestEntryPointInterfaceEnlargement) {
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// This checks that when global variables are added to a SPIR-V 1.4+ module,
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// they are also added to entry points of that module.
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std::string shader = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %4 "m1"
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OpEntryPoint Vertex %5 "m2"
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OpExecutionMode %4 OriginUpperLeft
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OpSource ESSL 310
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%2 = OpTypeVoid
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%3 = OpTypeFunction %2
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%6 = OpTypeFloat 32
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%7 = OpTypeInt 32 1
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%8 = OpTypeVector %6 2
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%9 = OpTypePointer Function %6
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%10 = OpTypePointer Private %6
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%20 = OpTypePointer Uniform %6
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%11 = OpTypePointer Function %7
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%12 = OpTypePointer Private %7
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%13 = OpTypePointer Private %8
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%14 = OpVariable %10 Private
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%15 = OpVariable %20 Uniform
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%16 = OpConstant %7 1
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%17 = OpTypePointer Private %10
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%18 = OpTypeBool
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%19 = OpTypePointer Private %18
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%21 = OpConstantTrue %18
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%4 = OpFunction %2 None %3
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%30 = OpLabel
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OpReturn
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OpFunctionEnd
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%5 = OpFunction %2 None %3
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%31 = OpLabel
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OpReturn
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OpFunctionEnd
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)";
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const auto env = SPV_ENV_UNIVERSAL_1_4;
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const auto consumer = nullptr;
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const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
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ASSERT_TRUE(IsValid(env, context.get()));
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FactManager fact_manager;
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TransformationAddGlobalVariable transformations[] = {
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// %100 = OpVariable %12 Private
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TransformationAddGlobalVariable(100, 12, 0, true),
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// %101 = OpVariable %12 Private %16
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TransformationAddGlobalVariable(101, 12, 16, false),
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// %102 = OpVariable %19 Private %21
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TransformationAddGlobalVariable(102, 19, 21, true)};
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for (auto& transformation : transformations) {
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ASSERT_TRUE(transformation.IsApplicable(context.get(), fact_manager));
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transformation.Apply(context.get(), &fact_manager);
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}
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ASSERT_TRUE(fact_manager.PointeeValueIsIrrelevant(100));
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ASSERT_TRUE(fact_manager.PointeeValueIsIrrelevant(102));
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ASSERT_FALSE(fact_manager.PointeeValueIsIrrelevant(101));
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ASSERT_TRUE(IsValid(env, context.get()));
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std::string after_transformation = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %4 "m1" %100 %101 %102
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OpEntryPoint Vertex %5 "m2" %100 %101 %102
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OpExecutionMode %4 OriginUpperLeft
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OpSource ESSL 310
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%2 = OpTypeVoid
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%3 = OpTypeFunction %2
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%6 = OpTypeFloat 32
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%7 = OpTypeInt 32 1
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%8 = OpTypeVector %6 2
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%9 = OpTypePointer Function %6
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%10 = OpTypePointer Private %6
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%20 = OpTypePointer Uniform %6
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%11 = OpTypePointer Function %7
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%12 = OpTypePointer Private %7
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%13 = OpTypePointer Private %8
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%14 = OpVariable %10 Private
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%15 = OpVariable %20 Uniform
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%16 = OpConstant %7 1
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%17 = OpTypePointer Private %10
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%18 = OpTypeBool
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%19 = OpTypePointer Private %18
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%21 = OpConstantTrue %18
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%100 = OpVariable %12 Private
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%101 = OpVariable %12 Private %16
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%102 = OpVariable %19 Private %21
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%4 = OpFunction %2 None %3
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%30 = OpLabel
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OpReturn
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OpFunctionEnd
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%5 = OpFunction %2 None %3
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%31 = OpLabel
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OpReturn
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OpFunctionEnd
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)";
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ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
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}
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} // namespace
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} // namespace fuzz
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} // namespace spvtools
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