The fix updates HeapMerger to use writer buffer (no need to copy memory, also writer buffer is 1MB instead of 4KB). Additionally fixed small issue in FileWriter (looks like `ssize_t` instead of `size_t` is a typo, the argument should be unsigned)
Testing: all HeapDump-related tests on Oracle supported platforms ------------- Commit messages: - fix Changes: https://git.openjdk.org/jdk/pull/18850/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18850&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8320215 Stats: 22 lines in 3 files changed: 9 ins; 4 del; 9 mod Patch: https://git.openjdk.org/jdk/pull/18850.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18850/head:pull/18850 PR: https://git.openjdk.org/jdk/pull/18850
