|author||Rich Felker <firstname.lastname@example.org>||2011-05-07 23:23:58 -0400|
|committer||Rich Felker <email@example.com>||2011-05-07 23:23:58 -0400|
overhaul implementation-internal signal protections
the new approach relies on the fact that the only ways to create sigset_t objects without invoking UB are to use the sig*set() functions, or from the masks returned by sigprocmask, sigaction, etc. or in the ucontext_t argument to a signal handler. thus, as long as sigfillset and sigaddset avoid adding the "protected" signals, there is no way the application will ever obtain a sigset_t including these bits, and thus no need to add the overhead of checking/clearing them when sigprocmask or sigaction is called. note that the old code actually *failed* to remove the bits from sa_mask when sigaction was called. the new implementations are also significantly smaller, simpler, and faster due to ignoring the useless "GNU HURD signals" 65-1024, which are not used and, if there's any sanity in the world, never will be used.
Diffstat (limited to 'dist')
1 files changed, 1 insertions, 1 deletions
diff --git a/dist/config.mak b/dist/config.mak
index 691e3ce1..66aa44cd 100644
@@ -18,7 +18,7 @@ exec_prefix = /usr/local
#CFLAGS += -fomit-frame-pointer -mno-accumulate-outgoing-args
# Uncomment for warnings (as errors). Might need tuning to your gcc version.
-#CFLAGS += -Werror -Wall -Wpointer-arith -Wcast-align -Wno-parentheses -Wno-char-subscripts -Wno-uninitialized -Wno-sequence-point -Wno-missing-braces -Wno-unused-value
+#CFLAGS += -Werror -Wall -Wpointer-arith -Wcast-align -Wno-parentheses -Wno-char-subscripts -Wno-uninitialized -Wno-sequence-point -Wno-missing-braces -Wno-unused-value -Wno-overflow -Wno-int-to-pointer-cast
# Uncomment if you want to build a shared library (experimental).
#LIBC_LIBS += lib/libc.so