RFR(XS): 7902477: JMH perfasm fails with lastest JDK 13

[Aleksey Shipilev]

Hi Nick,

On 10/30/19 10:37 AM, Nick Gasson wrote:
> As a workaround I changed the regex to anchor to the start of the line
> and require leading non-whitespace (the address on the line above has
> leading spaces where the stubs do not):
> 
>   Pattern.compile("^(\\S.*)( +)\\[(.+), (.+)[\\]\\[](.*)");

Can you show the example output where the original regexp fails? Because I think you are adding
another capture group here, which means the matcher indices at L850-751 below should be amended:

 846    Pattern pattern = Pattern.compile("^(\\S.*)( +)\\[(.+), (.+)[\\]\\[](.*)");
 847    Matcher matcher = pattern.matcher(line);
 848
 849    if (matcher.matches()) {
 850       Long startAddr = parseAddress(matcher.group(3));
 851       Long endAddr = parseAddress(matcher.group(4));

It is puzzling it works after your patch.

-- 
Thanks,
-Aleksey