From 99b8a25e941e54537bf39ca2f265c345f393f112 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 7 May 2011 23:23:58 -0400 Subject: 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. --- dist/config.mak | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'dist/config.mak') diff --git a/dist/config.mak b/dist/config.mak index 691e3ce1..66aa44cd 100644 --- a/dist/config.mak +++ b/dist/config.mak @@ -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 -- cgit v1.2.1