* Jonathan Wakely: > On Fri, 17 Oct 2025 at 08:06, Florian Weimer wrote: >> >> * Jonathan Wakely: >> >> > With this change locations that don't have a source file look like this: >> > >> > 18# __libc_start_call_main at [0x7fd6568f6574] >> > 19# __libc_start_main@GLIBC_2.2.5 at [0x7fd6568f6627] >> > 20# _start at [0x4006a4] >> >> Note that DSO name plus offset would be significantly more useful than >> just the address, due to ASLR. > > I think that's the topic of > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110196 (although the > report seems to switch topic halfway through). > > I don't know how to get that info from libbacktrace, but the bug above > suggests using dladdr1 for it (I think dladdr would work too, and is > more portable).
Using _dl_find_object would be faster, but getting the real base address from the link map returned is currently non-trivial. (Currently, dladdr does not use _dl_find_object, and getting the symbol name is quite ineffiecient, too.) See the documentation of l_addr in the glibc manual. Thanks, Florian
