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From 56893a61aa4f0270fa8d1197b9848247f90fce0d Mon Sep 17 00:00:00 2001
From: Yousong Zhou <yszhou4tech@gmail.com>
Date: Fri, 24 Mar 2017 10:36:03 +0800
Subject: [PATCH] Fix invalid sigprocmask call
The POSIX document says
The pthread_sigmask() and sigprocmask() functions shall fail if:
[EINVAL]
The value of the how argument is not equal to one of the defined values.
and this is how musl-libc is currently doing. Fix the call to be safe
and correct
[1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_sigmask.html
gdb/ChangeLog:
2017-03-24 Yousong Zhou <yszhou4tech@gmail.com>
* common/signals-state-save-restore.c (save_original_signals_state):
Fix invalid sigprocmask call.
---
gdb/ChangeLog | 5 +++++
gdb/common/signals-state-save-restore.c | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
--- a/gdbsupport/signals-state-save-restore.cc
+++ b/gdbsupport/signals-state-save-restore.cc
@@ -38,7 +38,7 @@ save_original_signals_state (bool quiet)
int i;
int res;
- res = gdb_sigmask (0, NULL, &original_signal_mask);
+ res = gdb_sigmask (SIG_BLOCK, NULL, &original_signal_mask);
if (res == -1)
perror_with_name (("sigprocmask"));
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