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Bug 1190777 - Add null checks to prevent bad dereferences. r=kamidphish

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This commit is contained in:
Kyle 2015-08-11 10:17:16 -04:00
parent 92b3e3e9e6
commit 83c89c4bbf
1 changed files with 25 additions and 9 deletions
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34
dom/canvas/WebGLShaderValidator.cpp
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@ -209,12 +209,23 @@ StartsWith(const std::string& haystack, const char (&needle)[N])
bool
ShaderValidator::CanLinkTo(const ShaderValidator* prev, nsCString* const out_log) const
{
{
const std::vector<sh::Uniform>& vertList = *ShGetUniforms(prev->mHandle);
const std::vector<sh::Uniform>& fragList = *ShGetUniforms(mHandle);
if (!prev) {
nsPrintfCString error("Passed in NULL prev ShaderValidator.");
*out_log = error;
return false;
}
for (auto itrFrag = fragList.begin(); itrFrag != fragList.end(); ++itrFrag) {
for (auto itrVert = vertList.begin(); itrVert != vertList.end(); ++itrVert) {
{
const std::vector<sh::Uniform>* vertPtr = ShGetUniforms(prev->mHandle);
const std::vector<sh::Uniform>* fragPtr = ShGetUniforms(mHandle);
if (!vertPtr || !fragPtr) {
nsPrintfCString error("Could not create uniform list.");
*out_log = error;
return false;
}
for (auto itrFrag = fragPtr->begin(); itrFrag != fragPtr->end(); ++itrFrag) {
for (auto itrVert = vertPtr->begin(); itrVert != vertPtr->end(); ++itrVert) {
if (itrVert->name != itrFrag->name)
continue;
@ -231,12 +242,17 @@ ShaderValidator::CanLinkTo(const ShaderValidator* prev, nsCString* const out_log
}
}
{
const std::vector<sh::Varying>& vertList = *ShGetVaryings(prev->mHandle);
const std::vector<sh::Varying>& fragList = *ShGetVaryings(mHandle);
const std::vector<sh::Varying>* vertPtr = ShGetVaryings(prev->mHandle);
const std::vector<sh::Varying>* fragPtr = ShGetVaryings(mHandle);
if (!vertPtr || !fragPtr) {
nsPrintfCString error("Could not create varying list.");
*out_log = error;
return false;
}
nsTArray<ShVariableInfo> staticUseVaryingList;
for (auto itrFrag = fragList.begin(); itrFrag != fragList.end(); ++itrFrag) {
for (auto itrFrag = fragPtr->begin(); itrFrag != fragPtr->end(); ++itrFrag) {
const ShVariableInfo varInfo = { itrFrag->type,
(int)itrFrag->elementCount() };
@ -251,7 +267,7 @@ ShaderValidator::CanLinkTo(const ShaderValidator* prev, nsCString* const out_log
bool definedInVertShader = false;
bool staticVertUse = false;
for (auto itrVert = vertList.begin(); itrVert != vertList.end(); ++itrVert) {
for (auto itrVert = vertPtr->begin(); itrVert != vertPtr->end(); ++itrVert) {
if (itrVert->name != itrFrag->name)
continue;