1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
Adds AllowEnhancedClassRedefinition argument.
diff --git a/src/share/vm/runtime/arguments.cpp b/src/share/vm/runtime/arguments.cpp
--- a/src/share/vm/runtime/arguments.cpp
+++ b/src/share/vm/runtime/arguments.cpp
@@ -59,8 +59,8 @@
#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.sun.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
@@ -1507,6 +1507,10 @@
void Arguments::set_ergonomics_flags() {
+ if (AllowEnhancedClassRedefinition) {
+ // (DCEVM) enforces serial GC
+ FLAG_SET_ERGO(bool, UseSerialGC, true);
+ }
if (os::is_server_class_machine()) {
// If no other collector is requested explicitly,
// let the VM select the collector based on
@@ -1948,6 +1952,17 @@
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 --git a/src/share/vm/runtime/globals.hpp b/src/share/vm/runtime/globals.hpp
--- a/src/share/vm/runtime/globals.hpp
+++ b/src/share/vm/runtime/globals.hpp
@@ -1273,6 +1273,9 @@
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") \
\
|
