RFR: 8358289: [asan] runtime/cds/appcds/aotCode/AOTCodeFlags.java reports heap-buffer-overflow in ArchiveBuilder [v3]

Vladimir Kozlov kvn at openjdk.org
Tue Jun 3 18:17:29 UTC 2025


> There is difference between AdapterFingerPrint allocation size [compute_size](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/runtime/sharedRuntime.cpp#L2227) which may not be aligned to HeapWord size and [size](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/runtime/sharedRuntime.cpp#L2421) used for copying during AOT cache build which is aligned and can be bigger than allocation size. 
> 
> I added asserts to `AdapterFingerPrint` and `AdapterHandlerEntry` to make sure sizes are correct. Both are used in AOT cache build.
> 
> I also moved `FreeHeap()` from `~AdapterFingerPrint()` to enforce the comment and simplify executed code.
> 
> Thanks to @MBaesken for finding the issue and @iklam for pointing the cause.
> 
> Testing tier1-3, xcomp, stress. Higher tiers are still running.

Vladimir Kozlov has updated the pull request incrementally with one additional commit since the last revision:

  Use one compute_size_in_words() method

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/25604/files
  - new: https://git.openjdk.org/jdk/pull/25604/files/9b67ceab..862e7826

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25604&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25604&range=01-02

  Stats: 10 lines in 1 file changed: 2 ins; 1 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/25604.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25604/head:pull/25604

PR: https://git.openjdk.org/jdk/pull/25604


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