Integrated: 8314029: Add file name parameter to Compiler.perfmap

[Yi-Fan Tsai]

On Thu, 21 Sep 2023 20:43:56 GMT, Yi-Fan Tsai <duke at openjdk.org> wrote:

> `jcmd Compiler.perfmap` uses the hard-coded file name for a perf map: `/tmp/perf-%d.map`. This change adds an optional argument for specifying a file name.
> 
> `jcmd PID help Compiler.perfmap` shows the following usage.
> 
> 
> Compiler.perfmap
> Write map file for Linux perf tool.
> 
> Impact: Low
> 
> Syntax : Compiler.perfmap  [<filename>]
> 
> Arguments:
>         filename : [optional] Name of the map file (STRING, no default value)
> 
> 
> The following section of man page is also updated. (`man -l src/jdk.jcmd/share/man/jcmd.1`)
> 
> 
>        Compiler.perfmap [arguments] (Linux only)
>               Write map file for Linux perf tool.
> 
>               Impact: Low
> 
>               arguments:
> 
>               · filename: (Optional) Name of the map file (STRING, no default value)
> 
>               If filename is not specified, a default file name is chosen using the pid of the target JVM process.  For example, if the pid is 12345,  then
>               the default filename will be /tmp/perf-12345.map.

This pull request has now been integrated.

Changeset: a5122d7f
Author:    Yi-Fan Tsai <yftsai at amazon.com>
Committer: Paul Hohensee <phh at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/a5122d7f6c36a4c98ea4bea7a7c8081e2a4dadca
Stats:     56 lines in 6 files changed: 37 ins; 3 del; 16 mod

8314029: Add file name parameter to Compiler.perfmap

Reviewed-by: cjplummer, eastigeevich

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PR: https://git.openjdk.org/jdk/pull/15871