On Tue, 27 Aug 2024 05:18:27 GMT, Chris Plummer <cjplum...@openjdk.org> wrote:
> I found this:
>
> ```
> // should we parse DLL symbol table in Java code or use
> // Windbg's native lookup facility? By default, we use
> // native lookup so that we can take advantage of '.pdb'
> // files, if available.
> useNativeLookup = true;
> String str =
> System.getProperty("sun.jvm.hotspot.debugger.windbg.disableNativeLookup");
> if (str != null) {
> useNativeLookup = false;
> }
> ```
>
> I'm not sure what is meant by "take advantage of '.pbp' files". Is it perhaps
> a more reliable or complete database of symbols, or perhaps it is faster? In
> any case, I'd be interested in seeing if all our tests still pass when
> useNativeLookup is false.
As far as I understand .pdb files contain symbol information.
I run tier1,tier2,hs-tier5-svc with
"-Dsun.jvm.hotspot.debugger.windbg.disableNativeLookup=yes" on windows-x64 and
windows-x64-debug
Got 110 failures; all failures on debug build, most of them with NPE:
Error: java.lang.NullPointerException: Cannot invoke
"sun.jvm.hotspot.debugger.Address.getJBooleanAt(long)" because "address" is null
java.lang.NullPointerException: Cannot invoke
"sun.jvm.hotspot.debugger.Address.getJBooleanAt(long)" because "address" is null
at
jdk.hotspot.agent/sun.jvm.hotspot.runtime.VM.isSharingEnabled(VM.java:940)
at
jdk.hotspot.agent/sun.jvm.hotspot.types.basic.BasicTypeDataBase.findDynamicTypeForAddress(BasicTypeDataBase.java:240)
...
-------------
PR Comment: https://git.openjdk.org/jdk/pull/20684#issuecomment-2313681655
