FWIW, the patch I am currently using is attached.
Bogdan
On Fri, Mar 22, 2019 at 11:38 AM Bogdan Harjoc <[email protected]> wrote:
>
> After building uclibc-1.0.31 with AddressSanitizer enabled (gcc7.3 and
> 8.2), asan complains at runtime that it's not the first library in the
> so-list.
>
> With a breakpoint on AsanCheckDynamicRTPrereqs which calls
> __dl_iterate_phdr, I see the first module that uClibc returns has
> info->libname = "/home/user/myapp", while on glibc-2.27, libname is an
> empty string. ASAN depends on seeing this empty string.
>
> Should __dl_iterate_phdr return an empty string here, or is there an
> alternative to get asan-enabled uClibc toolchains ?
>
> Thanks.
--- uClibc-ng-1.0.31/ldso/ldso/ldso.c 2019-03-22 11:45:09.767940921 +0200
+++ uClibc-ng-1.0.31/ldso/ldso/ldso.c 2019-03-22 11:45:14.309958978 +0200
@@ -712,7 +712,7 @@
continue;
#endif
/* OK, we have what we need - slip this one into the list. */
- app_tpnt = _dl_add_elf_hash_table(_dl_progname, app_tpnt->loadaddr,
+ app_tpnt = _dl_add_elf_hash_table("", app_tpnt->loadaddr,
app_tpnt->dynamic_info,
(unsigned long) DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr),
ppnt->p_filesz);
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