RFR: 8292981: Unify and restructure integer printing format specifiers [v8]

[Stefan Karlsson]

> Today we have some inconsistencies in how we name our integer printing format specifiers. I'd like to change this to be consistent. 
> 
> This patch comes from a discussion in #10028, which snowballed into restructuring the format specifiers. The main issues was that my original patch used PTR<size>_FORMAT to print integers with the format 0x000<value>. The reviewers felt that it was wrong to use PTR format specifiers when printing integers. I agree with that.
> 
> We do have format specifiers to print hex values out of integers, though they don't 0-pad like the PTR macros do, and only some of the prepend 0x.
> 
> I'd like to suggest that we use a convention to specify what we want. This is the current proposal:
> 
> // Guide to the suffixes used in the format specifiers for integers:
> //        - print the decimal value:                   745565
> //  _X    - print as hexadecimal, without leading 0s: 0x12345
> //  _X_0  - print as hexadecimal, with leading 0s: 0x00012345
> //  _H    - print as hexadecimal, without 0x prefix
> //  _W(w) - prints w sized string with the given value right
> //          adjusted. Use -w to print left adjusted.
> //
> // Note that the PTR format specifiers print using 0x with leading zeros,
> // just like the _X_0 version for integers.
> 
> 
> The patch also removes PTR32_FORMAT and PTR64_FORMAT and replace them with the corresponding integer format specifiers.

Stefan Karlsson has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains eight additional commits since the last revision:

 - Merge remote-tracking branch 'upstream/master' into 8292981_unify_integer_format_specifiers
 - Merge branch 'master' into 8292981_unify_integer_format_specifiers
 - Remove _H variants
 - Removed extraneous 0x
 - Move INTPTR_FORMAT_H_W to Shenandoah
 - Use PTR_FORMAT in AIX code
 - Fix Shenandoah
 - 8292981: Unify and restructure integer printing format specifiers

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10042/files
  - new: https://git.openjdk.org/jdk/pull/10042/files/52220b7d..6c1cdc84

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10042&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10042&range=06-07

  Stats: 4552 lines in 177 files changed: 2348 ins; 817 del; 1387 mod
  Patch: https://git.openjdk.org/jdk/pull/10042.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10042/head:pull/10042

PR: https://git.openjdk.org/jdk/pull/10042