https://bugs.kde.org/show_bug.cgi?id=472973
Bug ID: 472973
Summary: add debuginfod client support for source code
downloading on the fly
Classification: Developer tools
Product: kcachegrind
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: josef.weidendor...@gmx.de
Reporter: f...@redhat.com
Target Milestone: ---
Several modern linux distros run debuginfo + source code downloading service
called debuginfod - https://sourceware.org/elfutils/Debuginfod.html .
kcachegrind could take advantage to download source code to binaries and
especially shared libraries being profiled. This could get rid of many
occurrences of the "There is no source available for ...." diagnostics.
The simplest way to use it would be to extend libviews/sourceview.cpp to call
out to "debuginfod-find $PATH source $SOURCEFILE", consume its standard output
as a file name (if rc==0). That file should contain the contents of the source
file.
In the case of callgrind output files, $PATH would probably come from "ob=(N)
$PATH" and "cob=(N) $PATH", and $SOURCEFILE is the nearby "fi=(N) $SOURCEFILE".
callgrind.out:
[...]
cob=(2) /usr/lib64/libc.so.6
[...]
fi=(349) /usr/src/debug/glibc-2.37-4.fc38.x86_64/libio/libioP.h
% debuginfod-find /usr/lib64/libc.so.6 source
/usr/src/debug/glibc-2.37-4.fc38.x86_64/libio/libioP.h
/home/you/.cache/debuginfod_client/SOMETHING/ELSE.h
% cat /home/you/.cache/debuginfod_client/SOMETHING/ELSE.h
/* ..... glibc goodness ..... */
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