commit 200b6a5a0ea3e1e154663b0fc575bfe2becf177d
Author: Mark Wielaard <mark@klomp.org>
Date:   Wed Jul 21 17:55:40 2021 +0200

    m_debuginfo/debuginfo.c VG_(get_fnname_kind) _start is below main
    
    With glibc 2.34 we might see the _start symbol as the frame that
    called main instead of directly after __libc_start_main or
    generic_start_main.
    
    Fixes memcheck/tests/badjump[2], memcheck/tests/origin4-many,
    helgrind/tests/tc04_free_lock, helgrind/tests/tc09_bad_unlock
    and helgrind/tests/tc20_verifywrap.

diff --git a/coregrind/m_debuginfo/debuginfo.c b/coregrind/m_debuginfo/debuginfo.c
index bc2578b37..e2218f266 100644
--- a/coregrind/m_debuginfo/debuginfo.c
+++ b/coregrind/m_debuginfo/debuginfo.c
@@ -2289,6 +2289,7 @@ Vg_FnNameKind VG_(get_fnname_kind) ( const HChar* name )
        VG_STREQN(18, "__libc_start_main.", name) || // gcc optimization
        VG_STREQ("generic_start_main", name) ||  // Yellow Dog doggedness
        VG_STREQN(19, "generic_start_main.", name) || // gcc optimization
+       VG_STREQ("_start", name) ||
 #      elif defined(VGO_darwin)
        // See readmacho.c for an explanation of this.
        VG_STREQ("start_according_to_valgrind", name) ||  // Darwin, darling