Merge pull request #17260 from dsouzai/chtableAOTMismatch

Add CH Table AOT Feature Flag

runtime/compiler/runtime/RelocationRuntime.cpp

@@ -51,6 +51,7 @@
 #include "runtime/DataCache.hpp"
 #include "env/FrontEnd.hpp"
 #include "infra/Monitor.hpp"
+#include "env/PersistentCHTable.hpp"
 #include "env/PersistentInfo.hpp"
 #include "env/VMAccessCriticalSection.hpp"
 #include "env/CompilerEnv.hpp"
@@ -1085,6 +1086,8 @@ TR_SharedCacheRelocationRuntime::checkAOTHeaderFlags(const TR_AOTHeader *hdrInCa
       defaultMessage = generateError(J9NLS_RELOCATABLE_CODE_ACTIVE_CARD_TABLE_BASE_MISMATCH, "AOT header validation failed: Active Card Table Base feature mismatch.");
    if ((featureFlags & TR_FeatureFlag_ArrayHeaderShape) != (hdrInCache->featureFlags & TR_FeatureFlag_ArrayHeaderShape))
       defaultMessage = generateError(J9NLS_RELOCATABLE_CODE_ARRAY_HEADER_SHAPE_MISMATCH, "AOT header validation failed: Array header shape mismatch.");
+   if ((featureFlags & TR_FeatureFlag_CHTableEnabled) != (hdrInCache->featureFlags & TR_FeatureFlag_CHTableEnabled))
+      defaultMessage = generateError(J9NLS_RELOCATABLE_CODE_CH_TABLE_MISMATCH, "AOT header validation failed: CH Table mismatch.");
    if ((featureFlags & TR_FeatureFlag_SanityCheckEnd) != (hdrInCache->featureFlags & TR_FeatureFlag_SanityCheckEnd))
       defaultMessage = generateError(J9NLS_RELOCATABLE_CODE_HEADER_END_SANITY_BIT_MANGLED, "AOT header validation failed: Trailing sanity bit mismatch.");
 
@@ -1420,6 +1423,14 @@ TR_SharedCacheRelocationRuntime::generateFeatureFlags(TR_FrontEnd *fe)
    if (TR::Options::getCmdLineOptions()->isVariableActiveCardTableBase())
       featureFlags |= TR_FeatureFlag_IsVariableActiveCardTableBase;
 
+   TR::CompilationInfo *compInfo = TR::CompilationInfo::get();
+   TR_PersistentCHTable *cht = compInfo->getPersistentInfo()->getPersistentCHTable();
+   if (!TR::Options::getAOTCmdLineOptions()->getOption(TR_DisableCHOpts)
+       && cht && cht->isActive())
+      {
+      featureFlags |= TR_FeatureFlag_CHTableEnabled;
+      }
+
    return featureFlags;
    }
 

runtime/compiler/runtime/RelocationRuntime.hpp

@@ -80,6 +80,7 @@ typedef enum TR_AOTFeatureFlags
    TR_FeatureFlag_IsVariableHeapBaseForBarrierRange0 = 0x00004000,
    TR_FeatureFlag_IsVariableHeapSizeForBarrierRange0 = 0x00008000,
    TR_FeatureFlag_IsVariableActiveCardTableBase      = 0x00010000,
+   TR_FeatureFlag_CHTableEnabled                     = 0x00020000,
    TR_FeatureFlag_SanityCheckEnd                     = 0x80000000
    } TR_AOTFeatureFlags;
 

runtime/nls/jitm/j9jit.nls

@@ -413,3 +413,11 @@ J9NLS_RELOCATABLE_CODE_ARRAY_HEADER_SHAPE_MISMATCH.system_action=The compiler wi
 J9NLS_RELOCATABLE_CODE_ARRAY_HEADER_SHAPE_MISMATCH.user_response=Destroy and recreate the AOT code in the shared class cache for the current platform using the -Xshareclasses:reset option.
 J9NLS_RELOCATABLE_CODE_ARRAY_HEADER_SHAPE_MISMATCH.link=dita:///diag/appendixes/cmdline/cmdline_x.dita#cmdline_x/xshareclasses-reset
 # END NON-TRANSLATABLE
+
+J9NLS_RELOCATABLE_CODE_CH_TABLE_MISMATCH=CH Table mismatch. Ignoring AOT code in shared class cache.
+# START NON-TRANSLATABLE
+J9NLS_RELOCATABLE_CODE_CH_TABLE_MISMATCH.explanation=The JVM is not running in the same CH Table configuration as the one that generated the code in the SCC.
+J9NLS_RELOCATABLE_CODE_CH_TABLE_MISMATCH.system_action=The compiler will not generate AOT code. AOT code from the shared class cache will not be used.
+J9NLS_RELOCATABLE_CODE_CH_TABLE_MISMATCH.user_response=Destroy and recreate the AOT code in the shared class cache for the current platform using the -Xshareclasses:reset option.
+J9NLS_RELOCATABLE_CODE_CH_TABLE_MISMATCH.link=dita:///diag/appendixes/cmdline/cmdline_x.dita#cmdline_x/xshareclasses-reset
+# END NON-TRANSLATABLE