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4670071: loadClassInternal is too restrictive

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VM support for deadlock fix. Library fix in 4735126. See API proposal.

Reviewed-by: dholmes, blacklion
This commit is contained in:
Karen Kinnear 2009-01-05 13:44:03 -05:00
parent f05b009ce8
commit 315de68fc0
6 changed files with 138 additions and 66 deletions
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17
hotspot/src/share/vm/runtime/globals.hpp
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@ -835,8 +835,21 @@ class CommandLineFlags {
"Prints the system dictionary at exit") \
\
diagnostic(bool, UnsyncloadClass, false, \
"Unstable: VM calls loadClass unsynchronized. Custom classloader "\
"must call VM synchronized for findClass & defineClass") \
"Unstable: VM calls loadClass unsynchronized. Custom " \
"class loader must call VM synchronized for findClass " \
"and defineClass.") \
\
product(bool, AlwaysLockClassLoader, false, \
"Require the VM to acquire the class loader lock before calling " \
"loadClass() even for class loaders registering " \
"as parallel capable. Default false. ") \
\
product(bool, AllowParallelDefineClass, false, \
"Allow parallel defineClass requests for class loaders " \
"registering as parallel capable. Default false") \
\
product(bool, MustCallLoadClassInternal, false, \
"Call loadClassInternal() rather than loadClass().Default false") \
\
product_pd(bool, DontYieldALot, \
"Throw away obvious excess yield calls (for SOLARIS only)") \