Hi Jeff, On Tue, Aug 17, 2021 at 03:40:08AM +0000, Jeff Lin via Elfutils-devel wrote: > I’ve written code to extract function from a shared object with > dwarf_begin api that finds the dwarf objects with the file > descriptor using dwarf_getfuncs. However, when I tried to parse the > same object that is loaded into memory first, dwarf_getfuncs is not > able to get the function. In the case of accessing the object that > is in memory, I used the following line to get the dwarf object: > > Elf *ehandle = elf_memory(const_cast<char *>(so_file), size); > Dwarf *dw = dwarf_begin_elf(ehandle, DWARF_C_READ, NULL); > > I am able to get the offset and tag with dwarf_nextcu, but errors > out with dwarf_getfuncs. Does anyone know why dwarf_getfuncs does > return properly when trying to process dwarf object that was store > in memory?
If the ELF in memory is the same as the ELF on disk I don't know why dwarf_getfuncs would work differently. Does the callback get called? Does dwarf_getfuncs return -1? What does dwarf_errmsg say? Cheers, Mark
