[Bug go/64999] s390x libgo test failure in TestMemoryProfiler

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64999

--- Comment #31 from Ian Lance Taylor <ian at airs dot com> ---
> Why is it important to be able to map a file:line to a single PC?

The problem is that the Go code in the runtime/pprof package assumes that it
can take a single PC value and map that to a meaningful file/line.  Which it
can, but with gccgo it loses inlining information.


>> But there is no useful file/line information in a signal handler anyhow.
>
> I would imagine file:line information *is* useful for user written signal handlers and in case of a panic or crash.

Sorry, I misspoke.  I meant signal trampoline--the code in the C library that
is invoked by the kernel--not signal handler.