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# HG changeset patch
# Parent 7e9e421e88b58544d31212dd6961cdf51be5e5aa
diff -r 7e9e421e88b5 src/share/vm/runtime/arguments.cpp
--- a/src/share/vm/runtime/arguments.cpp Wed Apr 01 14:45:44 2015 -0700
+++ b/src/share/vm/runtime/arguments.cpp Mon Apr 06 10:54:01 2015 -0700
@@ -65,8 +65,8 @@
#include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
#endif // INCLUDE_ALL_GCS
-// Note: This is a special bug reporting site for the JVM
-#define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
+// (DCEVM) The DCE VM has its own JIRA bug tracking system.
+#define DEFAULT_VENDOR_URL_BUG "https://github.com/dcevm/dcevm/issues"
#define DEFAULT_JAVA_LAUNCHER "generic"
// Disable options not supported in this release, with a warning if they
@@ -1561,7 +1561,10 @@
}
void Arguments::select_gc_ergonomically() {
- if (os::is_server_class_machine()) {
+ if (AllowEnhancedClassRedefinition) {
+ // (DCEVM) enforces serial GC
+ FLAG_SET_ERGO(bool, UseSerialGC, true);
+ } else if (os::is_server_class_machine()) {
if (should_auto_select_low_pause_collector()) {
FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
} else {
@@ -2082,6 +2085,17 @@
if (UseConcMarkSweepGC || UseParNewGC) i++;
if (UseParallelGC || UseParallelOldGC) i++;
if (UseG1GC) i++;
+
+ if (AllowEnhancedClassRedefinition) {
+ // (DCEVM) Must use serial GC. This limitation applies because the instance size changing GC modifications
+ // are only built into the mark and compact algorithm.
+ if (!UseSerialGC && i >= 1) {
+ jio_fprintf(defaultStream::error_stream(),
+ "Must use the serial GC in the DCEVM\n");
+ status = false;
+ }
+ }
+
if (i > 1) {
jio_fprintf(defaultStream::error_stream(),
"Conflicting collector combinations in option list; "
diff -r 7e9e421e88b5 src/share/vm/runtime/globals.hpp
--- a/src/share/vm/runtime/globals.hpp Wed Apr 01 14:45:44 2015 -0700
+++ b/src/share/vm/runtime/globals.hpp Mon Apr 06 10:54:01 2015 -0700
@@ -1305,6 +1305,9 @@
product(intx, TraceRedefineClasses, 0, \
"Trace level for JVMTI RedefineClasses") \
\
+ product(bool, AllowEnhancedClassRedefinition, true, \
+ "Allow enhanced class redefinition beyond swapping method bodies")\
+ \
develop(bool, StressMethodComparator, false, \
"Run the MethodComparator on all loaded methods") \
\
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