Fix memory crash in vulakn writeUniformBuffers

src/gpu/vk/GrVkProgram.cpp

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "GrVkProgram.h"
 
 #include "GrPipeline.h"
@@ skipping 184 matching lines @@
 
 void GrVkProgram::writeUniformBuffers(const GrVkGpu* gpu) {
     fProgramDataManager.uploadUniformBuffers(gpu, fVertexUniformBuffer, fFragmentUniformBuffer);
 
     VkWriteDescriptorSet descriptorWrites[2];
     memset(descriptorWrites, 0, 2 * sizeof(VkWriteDescriptorSet));
 
     uint32_t firstUniformWrite = 0;
     uint32_t uniformBindingUpdateCount = 0;
 
+    VkDescriptorBufferInfo vertBufferInfo;
     // Vertex Uniform Buffer
     if (fVertexUniformBuffer.get()) {
         ++uniformBindingUpdateCount;
-        VkDescriptorBufferInfo vertBufferInfo;
         memset(&vertBufferInfo, 0, sizeof(VkDescriptorBufferInfo));
         vertBufferInfo.buffer = fVertexUniformBuffer->buffer();
         vertBufferInfo.offset = 0;
         vertBufferInfo.range = fVertexUniformBuffer->size();
 
         descriptorWrites[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
         descriptorWrites[0].pNext = nullptr;
         descriptorWrites[0].dstSet = fDescriptorSets[1];
         descriptorWrites[0].dstBinding = GrVkUniformHandler::kVertexBinding;
         descriptorWrites[0].dstArrayElement = 0;
         descriptorWrites[0].descriptorCount = 1;
         descriptorWrites[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
         descriptorWrites[0].pImageInfo = nullptr;
         descriptorWrites[0].pBufferInfo = &vertBufferInfo;
         descriptorWrites[0].pTexelBufferView = nullptr;
     }
 
+    VkDescriptorBufferInfo fragBufferInfo;
     // Fragment Uniform Buffer
     if (fFragmentUniformBuffer.get()) {
         if (0 == uniformBindingUpdateCount) {
             firstUniformWrite = 1;
         }
         ++uniformBindingUpdateCount;
-        VkDescriptorBufferInfo fragBufferInfo;
         memset(&fragBufferInfo, 0, sizeof(VkDescriptorBufferInfo));
         fragBufferInfo.buffer = fFragmentUniformBuffer->buffer();
         fragBufferInfo.offset = 0;
         fragBufferInfo.range = fFragmentUniformBuffer->size();
 
         descriptorWrites[1].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
         descriptorWrites[1].pNext = nullptr;
         descriptorWrites[1].dstSet = fDescriptorSets[1];
         descriptorWrites[1].dstBinding = GrVkUniformHandler::kFragBinding;;
         descriptorWrites[1].dstArrayElement = 0;
@@ skipping 115 matching lines @@
 
     for (int i = 0; i < fTextureViews.count(); ++i) {
         commandBuffer.addResource(fTextureViews[i]);
     }
 
     for (int i = 0; i < fTextures.count(); ++i) {
         commandBuffer.addResource(fTextures[i]);
     }
 #endif
 }