kc3-lang/angle/src/tests/compiler_tests/RewriteDoWhile_test.cpp

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• Author : Olli Etuaho
  Date : 2017-07-21 11:10:26
  Hash : 590f6235
  Message : Fix getting temporary id in RewriteDoWhile There's been a long-standing bug in RewriteDoWhile where it would only call nextTemporaryId() after it had created the temporary variable. This escalated into a null pointer dereference in the recent symbol table refactoring, and initializing the traverser with the symbol table was also missing. BUG=chromium:747244 TEST=angle_unittests Change-Id: I8987a609bb5d7d49e3c3e284fc42a2e53e38dafa Reviewed-on: https://chromium-review.googlesource.com/580887 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

• src/tests/compiler_tests/RewriteDoWhile_test.cpp

• //
  // Copyright (c) 2017 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // RewriteDoWhile_test.cpp:
  //   Tests that the RewriteDoWhile AST transform works correctly.
  //
  
  #include "GLSLANG/ShaderLang.h"
  #include "angle_gl.h"
  #include "gtest/gtest.h"
  #include "tests/test_utils/ShaderCompileTreeTest.h"
  
  using namespace sh;
  
  class RewriteDoWhileCrashTest : public ShaderCompileTreeTest
  {
    public:
      RewriteDoWhileCrashTest() {}
  
    protected:
      ::GLenum getShaderType() const override { return GL_FRAGMENT_SHADER; }
      ShShaderSpec getShaderSpec() const override { return SH_GLES3_1_SPEC; }
  
      void SetUp() override
      {
          mExtraCompileOptions |= SH_REWRITE_DO_WHILE_LOOPS;
          ShaderCompileTreeTest::SetUp();
      }
  };
  
  // Make sure that the RewriteDoWhile step doesn't crash due to creating temp symbols before calling
  // nextTemporaryId(). Regression test.
  TEST_F(RewriteDoWhileCrashTest, RunsSuccessfully)
  {
      const std::string &shaderString =
          "#version 300 es\n"
          "precision mediump float;\n"
          "uniform int u;\n"
          "out vec4 my_FragColor;\n"
          "void main()\n"
          "{\n"
          "    int foo = 1;"
          "    do\n"
          "    {\n"
          "         foo *= u;\n"
          "    } while (foo < 8);\n"
          "    my_FragColor = vec4(foo) * 0.1;"
          "}\n";
      if (!compile(shaderString))
      {
          FAIL() << "Shader compilation failed, expecting success:\n" << mInfoLog;
      }
  }