RFR: 8318982: improve Exceptions::special_exception [v2]
Doug Simon
dnsimon at openjdk.org
Tue Oct 31 19:31:56 UTC 2023
> This PR consolidates the 2 almost identical versions of `Exceptions::special_exception` into a single method.
> If a special exception is thrown and `-Xlog:exceptions` is enabled, a log message is emitted and it indicates the special handling.
>
> Here's an example in the output from running `compiler/linkage/LinkageErrors.java` with `-Xlog:exceptions -Xcomp`:
>
> [0.194s][info][exceptions] Exception <java/lang/IllegalAccessError: class java.lang.module.ModuleDescriptor$1 tried to access private method 'void java.lang.module.ModuleDescriptor$Exports.<init>(java.util.Set, java.lang.String, java.util.Set, boolean)' (java.lang.module.ModuleDescriptor$1 and java.lang.module.ModuleDescriptor$Exports are in module java.base of loader 'bootstrap')> (0x0000000000000000)
> thrown [src/hotspot/share/interpreter/linkResolver.cpp, line 591]
> for thread 0x000000011e18c600
> thread cannot call Java, throwing pre-allocated exception: a 'java/lang/VirtualMachineError'{0x0000000772e06f00}
>
>
> The motivation for this change was work on [JDK-8318694](https://bugs.openjdk.org/browse/JDK-8318694) where it's useful to know when exceptions are thrown on a CompilerThread.
Doug Simon has updated the pull request incrementally with one additional commit since the last revision:
add missing ResourceMark
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/16401/files
- new: https://git.openjdk.org/jdk/pull/16401/files/98da6cab..f74fa5ee
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=16401&range=01
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=16401&range=00-01
Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
Patch: https://git.openjdk.org/jdk/pull/16401.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/16401/head:pull/16401
PR: https://git.openjdk.org/jdk/pull/16401
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