< prev index next > src/hotspot/share/runtime/arguments.cpp
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#ifndef CAN_SHOW_REGISTERS_ON_ASSERT
UNSUPPORTED_OPTION(ShowRegistersOnAssert);
#endif // CAN_SHOW_REGISTERS_ON_ASSERT
+ #ifdef _LP64
+ if (UseCompactObjectHeaders && FLAG_IS_CMDLINE(UseCompressedClassPointers) && !UseCompressedClassPointers) {
+ // If user specifies -UseCompressedClassPointers, disable compact headers with a warning.
+ warning("Compact object headers require compressed class pointers. Disabling compact object headers.");
+ FLAG_SET_DEFAULT(UseCompactObjectHeaders, false);
+ }
+ if (UseCompactObjectHeaders) {
+ if (!UseFastLocking) {
+ // Lilliput requires fast-locking.
+ FLAG_SET_DEFAULT(UseFastLocking, true);
+ }
+ if (UseBiasedLocking) {
+ FLAG_SET_DEFAULT(UseBiasedLocking, false);
+ }
+ }
+ if (!UseCompactObjectHeaders) {
+ FLAG_SET_DEFAULT(UseSharedSpaces, false);
+ }
+ #endif
+
return JNI_OK;
}
// Helper class for controlling the lifetime of JavaVMInitArgs
// objects. The contents of the JavaVMInitArgs are guaranteed to be
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