https://bugs.kde.org/show_bug.cgi?id=397357
Bug ID: 397357
Summary: symbols not loaded with binutils-2.31.1 unless
-fuse-ld=gold specified to gcc/g++
Product: valgrind
Version: 3.13.0
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: jsew...@acm.org
Reporter: starlight.201...@binnacle.cx
Target Milestone: ---
Unusual setup here, running ancient distro and kernel but with recent/current
tools built from source.
Compiled and installed binutils-2.31.1 a week ago and just noticed that
valgrind no longer reads .debug_info from 64-bit ELF binaries unless gcc/g++ is
invoked with -fuse-ld=gold to select linking with gold linker.
Was at valgrind 3.10.0, immediately built and installed 3.13.0 which made no
difference. Problem appears independent of GCC version, tried 4.9.4 and 8.2,
both C and C++.
Invoking valgrind with --trace-symtab=yes -v shows symbols from prior binutils
generated libraries loading but for the target, loading fails with
{{{
------ Examining the program headers ------
PT_LOAD[2]: p_vaddr 0x400000 (prev 0x0)
PT_LOAD[2]: p_offset 0, p_filesz 7240, perms r--
--26491-- ELF section outside all mapped regions
------ ELF reading failed ------
------ name = xxxx
------ end ELF OBJECT -------------------------------------------------------
}}}
instead of progressing to PT_LOAD[3] and then
{{{
------ Examining the section headers ------
------ Finding image addresses for debug-info sections ------
------ The contents of .debug_ranges ------
------ The contents of .debug_abbrev ------
------ Parsing .debug_info section ------
------ .debug_info reading was successful ------
------ Canonicalising the acquired info ------
------ Notifying m_redir ------
------ name = xxxx
------ end ELF OBJECT -------------------------------------------------------
}}}
Appears the sort of issue worth fixing; or if too difficult, recognize and
recommend users link with gold.
Suggest valgrind complain when ELF reading fails. Without --trace-symtab=yes
no indication is present.
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