RFR: 8351334: [ubsan] memoryReserver.cpp:552:60: runtime error: applying non-zero offset 1073741824 to null pointer

[Francesco Andreuzzi]

On Wed, 27 Aug 2025 11:24:07 GMT, Afshin Zafari <azafari at openjdk.org> wrote:

> The minimum acceptable value was 0 where using it as address was problematic according to UBSAN.
> The acceptable value is changed to 64K.
> 
> Tests:
> linux-x64 tier1

src/hotspot/share/memory/memoryReserver.cpp line 552:

> 550: 
> 551:   char* aligned_heap_base_min_address = align_up((char*)HeapBaseMinAddress, alignment);
> 552:   assert(aligned_heap_base_min_address != 0,"Should not be 0");

Suggestion:

  assert(aligned_heap_base_min_address != 0, "Should not be 0");

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PR Review Comment: https://git.openjdk.org/jdk/pull/26955#discussion_r2304663375