RFR: 8331201: UBSAN enabled build reports on Linux x86_64 runtime error: shift exponent 65 is too large for 64-bit type 'long unsigned int' [v4]

[Afshin Zafari]

> The issue existed in making Fingerprints of method names. Each parameter in the methods' arguments is decoded as a 4-bits value. The 64-bits `fingertprint_t` can hold up to 14 parameters plus return type and static bit. To make the Fingerprint, the signature is iterated one parameter at a time and the corresponding code is accumulated after shifting the bits up.
> Some compilers do not mask the shift value to the base size and UBSAN catches the case. 
> In this PR, the number of parameters (`_param_count`) is used and compared with the max (14) to do the shift operation safely. The pre-existing `_param_size` is not reflecting the number of parameters, since it is incremented by 2 for `T_DOUBLE` and `T_LONG` types.

Afshin Zafari has updated the pull request incrementally with one additional commit since the last revision:

  count member is removed. Axel's suggestion is implemented.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22807/files
  - new: https://git.openjdk.org/jdk/pull/22807/files/00239755..442818d6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22807&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22807&range=02-03

  Stats: 11 lines in 2 files changed: 1 ins; 4 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/22807.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22807/head:pull/22807

PR: https://git.openjdk.org/jdk/pull/22807