Infrastructure: Make shared symbol-table cache complete, delete work around.

Fixes issue #370 and replaces PR #371.

glslang/Include/revision.h

@@ -2,5 +2,5 @@
 // For the version, it uses the latest git tag followed by the number of commits.
 // For the date, it uses the current date (when then script is run).
 
-#define GLSLANG_REVISION "SPIRV99.1394"
-#define GLSLANG_DATE "08-Aug-2016"
+#define GLSLANG_REVISION "SPIRV99.1396"
+#define GLSLANG_DATE "09-Aug-2016"

glslang/MachineIndependent/ShaderLang.cpp

@@ -146,6 +146,23 @@ int MapProfileToIndex(EProfile profile)
     return index;
 }
 
+const int SourceCount = 2;
+
+int MapSourceToIndex(EShSource source)
+{
+    int index = 0;
+
+    switch (source) {
+    case EShSourceGlsl: index = 0; break;
+    case EShSourceHlsl: index = 1; break;
+    default:                       break;
+    }
+
+    assert(index < SourceCount);
+
+    return index;
+}
+
 // only one of these needed for non-ES; ES needs 2 for different precision defaults of built-ins
 enum EPrecisionClass {
     EPcGeneral,
@@ -161,8 +178,8 @@ enum EPrecisionClass {
 // Each has a different set of built-ins, and we want to preserve that from
 // compile to compile.
 //
-TSymbolTable* CommonSymbolTable[VersionCount][SpvVersionCount][ProfileCount][EPcCount] = {};
-TSymbolTable* SharedSymbolTables[VersionCount][SpvVersionCount][ProfileCount][EShLangCount] = {};
+TSymbolTable* CommonSymbolTable[VersionCount][SpvVersionCount][ProfileCount][SourceCount][EPcCount] = {};
+TSymbolTable* SharedSymbolTables[VersionCount][SpvVersionCount][ProfileCount][SourceCount][EShLangCount] = {};
 
 TPoolAllocator* PerProcessGPA = 0;
 
@@ -305,7 +322,8 @@ void SetupBuiltinSymbolTable(int version, EProfile profile, const SpvVersion& sp
     int versionIndex = MapVersionToIndex(version);
     int spvVersionIndex = MapSpvVersionToIndex(spvVersion);
     int profileIndex = MapProfileToIndex(profile);
-    if (CommonSymbolTable[versionIndex][spvVersionIndex][profileIndex][EPcGeneral]) {
+    int sourceIndex = MapSourceToIndex(source);
+    if (CommonSymbolTable[versionIndex][spvVersionIndex][profileIndex][sourceIndex][EPcGeneral]) {
         glslang::ReleaseGlobalLock();
 
         return;
@@ -333,18 +351,18 @@ void SetupBuiltinSymbolTable(int version, EProfile profile, const SpvVersion& sp
     // Copy the local symbol tables from the new pool to the global tables using the process-global pool
     for (int precClass = 0; precClass < EPcCount; ++precClass) {
         if (! commonTable[precClass]->isEmpty()) {
-            CommonSymbolTable[versionIndex][spvVersionIndex][profileIndex][precClass] = new TSymbolTable;
-            CommonSymbolTable[versionIndex][spvVersionIndex][profileIndex][precClass]->copyTable(*commonTable[precClass]);
-            CommonSymbolTable[versionIndex][spvVersionIndex][profileIndex][precClass]->readOnly();
+            CommonSymbolTable[versionIndex][spvVersionIndex][profileIndex][sourceIndex][precClass] = new TSymbolTable;
+            CommonSymbolTable[versionIndex][spvVersionIndex][profileIndex][sourceIndex][precClass]->copyTable(*commonTable[precClass]);
+            CommonSymbolTable[versionIndex][spvVersionIndex][profileIndex][sourceIndex][precClass]->readOnly();
         }
     }
     for (int stage = 0; stage < EShLangCount; ++stage) {
         if (! stageTables[stage]->isEmpty()) {
-            SharedSymbolTables[versionIndex][spvVersionIndex][profileIndex][stage] = new TSymbolTable;
-            SharedSymbolTables[versionIndex][spvVersionIndex][profileIndex][stage]->adoptLevels(*CommonSymbolTable
-                              [versionIndex][spvVersionIndex][profileIndex][CommonIndex(profile, (EShLanguage)stage)]);
-            SharedSymbolTables[versionIndex][spvVersionIndex][profileIndex][stage]->copyTable(*stageTables[stage]);
-            SharedSymbolTables[versionIndex][spvVersionIndex][profileIndex][stage]->readOnly();
+            SharedSymbolTables[versionIndex][spvVersionIndex][profileIndex][sourceIndex][stage] = new TSymbolTable;
+            SharedSymbolTables[versionIndex][spvVersionIndex][profileIndex][sourceIndex][stage]->adoptLevels(*CommonSymbolTable
+                              [versionIndex][spvVersionIndex][profileIndex][sourceIndex][CommonIndex(profile, (EShLanguage)stage)]);
+            SharedSymbolTables[versionIndex][spvVersionIndex][profileIndex][sourceIndex][stage]->copyTable(*stageTables[stage]);
+            SharedSymbolTables[versionIndex][spvVersionIndex][profileIndex][sourceIndex][stage]->readOnly();
         }    
     }
 
@@ -656,6 +674,7 @@ bool ProcessDeferred(
     TSymbolTable* cachedTable = SharedSymbolTables[MapVersionToIndex(version)]
                                                   [MapSpvVersionToIndex(spvVersion)]
                                                   [MapProfileToIndex(profile)]
+                                                  [MapSourceToIndex(source)]
                                                   [compiler->getLanguage()];
     
     // Dynamically allocate the symbol table so we can control when it is deallocated WRT the pool.
@@ -1092,9 +1111,11 @@ int __fastcall ShFinalize()
     for (int version = 0; version < VersionCount; ++version) {
         for (int spvVersion = 0; spvVersion < SpvVersionCount; ++spvVersion) {
             for (int p = 0; p < ProfileCount; ++p) {
-                for (int lang = 0; lang < EShLangCount; ++lang) {
-                    delete SharedSymbolTables[version][spvVersion][p][lang];
-                    SharedSymbolTables[version][spvVersion][p][lang] = 0;
+                for (int source = 0; source < SourceCount; ++source) {
+                    for (int stage = 0; stage < EShLangCount; ++stage) {
+                        delete SharedSymbolTables[version][spvVersion][p][source][stage];
+                        SharedSymbolTables[version][spvVersion][p][source][stage] = 0;
+                    }
                 }
             }
         }
@@ -1103,9 +1124,11 @@ int __fastcall ShFinalize()
     for (int version = 0; version < VersionCount; ++version) {
         for (int spvVersion = 0; spvVersion < SpvVersionCount; ++spvVersion) {
             for (int p = 0; p < ProfileCount; ++p) {
-                for (int pc = 0; pc < EPcCount; ++pc) {
-                    delete CommonSymbolTable[version][spvVersion][p][pc];
-                    CommonSymbolTable[version][spvVersion][p][pc] = 0;
+                for (int source = 0; source < SourceCount; ++source) {
+                    for (int pc = 0; pc < EPcCount; ++pc) {
+                        delete CommonSymbolTable[version][spvVersion][p][source][pc];
+                        CommonSymbolTable[version][spvVersion][p][source][pc] = 0;
+                    }
                 }
             }
         }

gtests/Initializer.h

@@ -40,46 +40,14 @@
 namespace glslangtest {
 
 // Initializes glslang on creation, and destroys it on completion.
-// And provides .Acquire() as a way to reinitialize glslang if semantics change.
 // This object is expected to be a singleton, so that internal glslang state
 // can be correctly handled.
 //
-// TODO(antiagainst): It's a known bug that some of the internal states need to
-// be reset if semantics change:
-//   https://github.com/KhronosGroup/glslang/issues/166
-// Therefore, the following mechanism is needed. Remove this once the above bug
-// gets fixed.
 class GlslangInitializer {
 public:
-    GlslangInitializer() : lastMessages(EShMsgCascadingErrors)
-    {
-        glslang::InitializeProcess();
-    }
+    GlslangInitializer()  { glslang::InitializeProcess(); }
 
     ~GlslangInitializer() { glslang::FinalizeProcess(); }
-
-    // A token indicates that the glslang is reinitialized (if necessary) to the
-    // required semantics. And that won't change until the token is destroyed.
-    class InitializationToken {
-    };
-
-    // Re-initializes glsl state iff the previous messages and the current
-    // messages are incompatible.  We assume external synchronization, i.e.
-    // there is at most one acquired token at any one time.
-    InitializationToken acquire(EShMessages new_messages)
-    {
-        if ((lastMessages ^ new_messages) &
-            (EShMsgVulkanRules | EShMsgSpvRules | EShMsgReadHlsl)) {
-            glslang::FinalizeProcess();
-            glslang::InitializeProcess();
-        }
-        lastMessages = new_messages;
-        return InitializationToken();
-    }
-
-private:
-
-    EShMessages lastMessages;
 };
 
 }  // namespace glslangtest

gtests/TestFixture.h

@@ -179,8 +179,6 @@ public:
 
         shader->setStringsWithLengths(&shaderStrings, &shaderLengths, 1);
         if (!entryPointName.empty()) shader->setEntryPoint(entryPointName.c_str());
-        // Reinitialize glslang if the semantics change.
-        GlobalTestSettings.initializer->acquire(controls);
         return shader->parse(
                 (resources ? resources : &glslang::DefaultTBuiltInResource),
                 defaultVersion, isForwardCompatible, controls);