[glibc/azanella/clang] Handle abort call for -fexceptions call

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c7fbd2d41ba5acc69c5fe10af5dfce2821eb8b36

commit c7fbd2d41ba5acc69c5fe10af5dfce2821eb8b36
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Fri Apr 1 14:17:07 2022 -0300

    Handle abort call for -fexceptions call
    
    clang might generate an abort call when cleanup functions (set by
    __attribute__ ((cleanup)) calls functions not marked as nothrow.
    We can mitigate by marking some internal functions as __THROW,
    but it is not possible for functions that issue used-provided
    callbacks (for instance pthread_once).

Diff:
---
 sysdeps/generic/symbol-hacks.h | 7 +++++++
 sysdeps/nptl/lowlevellock.h    | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/sysdeps/generic/symbol-hacks.h b/sysdeps/generic/symbol-hacks.h
index 1115e4c0a7..560116d575 100644
--- a/sysdeps/generic/symbol-hacks.h
+++ b/sysdeps/generic/symbol-hacks.h
@@ -6,6 +6,13 @@ asm ("memmove = __GI_memmove");
 asm ("memset = __GI_memset");
 asm ("memcpy = __GI_memcpy");
 
+/* clang might generate an abort call when cleanup functions (set by
+   __attribute__ ((cleanup)) calls functions not marked as nothrow.
+   We can mitigate by marking some internal functions as __THROW,
+   but it is not possible for functions that issue used-provided
+   callbacks (for instance pthread_once).  */
+asm ("abort = __GI_abort");
+
 /* Some targets do not use __stack_chk_fail_local.  In libc.so,
    redirect __stack_chk_fail to a hidden reference
    __stack_chk_fail_local, to avoid the PLT reference.
diff --git a/sysdeps/nptl/lowlevellock.h b/sysdeps/nptl/lowlevellock.h
index 1fc4936a6c..4a769b799a 100644
--- a/sysdeps/nptl/lowlevellock.h
+++ b/sysdeps/nptl/lowlevellock.h
@@ -125,9 +125,9 @@ libc_hidden_proto (__lll_lock_wait)
 #define lll_cond_lock(futex, private) __lll_cond_lock (&(futex), private)
 
 
-extern void __lll_lock_wake_private (int *futex);
+extern void __lll_lock_wake_private (int *futex) __THROW;
 libc_hidden_proto (__lll_lock_wake_private)
-extern void __lll_lock_wake (int *futex, int private);
+extern void __lll_lock_wake (int *futex, int private) __THROW;
 libc_hidden_proto (__lll_lock_wake)
 
 /* This is an expression rather than a statement even though its value is