RFR: 8346157: [Ubsan]: runtime error: pointer index expression with base 0x000000001000 overflowed to 0xfffffffffffffff0 [v4]

[Amit Kumar]

> Fixes ubsan warning in mallocTracker.cpp

Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:

  corrects end capping, removes here==0 bailout code, replaces 0x100000 with M

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22885/files
  - new: https://git.openjdk.org/jdk/pull/22885/files/cdab784e..88d5baa9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22885&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22885&range=02-03

  Stats: 7 lines in 1 file changed: 0 ins; 5 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/22885.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22885/head:pull/22885

PR: https://git.openjdk.org/jdk/pull/22885