Hi, On Tue, Jan 15, 2019 at 01:35:40PM -0300, Arnaldo Carvalho de Melo wrote: > Em Tue, Jan 15, 2019 at 04:13:16PM +0000, Nick Clifton escreveu: > > Hi Jiri, > > > > > When perf is built with annobin plugin (RHEL8 build) extra symbols > > > are added to its binary: > > > > A bit of background for those wondering why annobin is creating > > these symbols: Annobin is a plugin for gcc that records data > > about how object file were built. It is specifically designed > > to be able to cope with files that are built using multiple > > different sets of optimization options. (Eg because of #pragma > > directives or function specific optimization attributes). It > > generates notes to cover each compiled region of code, and it > > needs the symbols in order to be able to determine exactly which > > areas in a linked binary were compiled with which options. > > Humm, it would be nice for perf annotate to show those options when one > navigates the annotation, something like press some hotkey and see the > optimization flags used. Is there any library that gets those > annotations and put them in some linked list that we could use in > tools/perf/?
If it's just an ELF note, we could parse it directly. https://developers.redhat.com/blog/2018/02/20/annobin-storing-information-binaries/ Thanks, Namhyung
