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Author	SHA1	Message	Date
Dmitry V. Levin	38a34c9349	Add copyright headers to some files which lack them Before this change, all files that exist since 20th century had copyright headers, while most files that appeared later didn't. This change fixes the inconsistency by adding missing copyright headers. It doesn't mean that copyright headers became maintained. In my view, git history provides much better information on this subject and is much more accurate than copyright headers.	2015-12-17 17:56:48 +00:00
Dmitry V. Levin	38593e942a	Rewrite signal mask decoding without sigset_t The sigset_t provided by libc is not quite convenient. In glibc, sigset_t is an array with space for 1024 bits, which is much more than required: all architectures supported by Linux have only 64 signals except MIPS, which has 128. In bionic libc, LP32 sigset_t is only 4 bytes long, which is less than necessary. With this change, signal mask is decoded without use of intermediate sigset_t structure, which saves us some cpu cycles in case of glibc with its inflated sigset_t, and enables build with libcs where sigset_t is broken. Old implementation used to check each signal number in the given signal mask twice using sigismember(). New implementation is based on popcount and next_set_bit() so it's noticeably faster. * configure.ac: Check for __builtin_popcount. * signal.c: Ensure that NSIG >= 32. (sprintsigmask, sprintsigmask_long, printsigmask): Remove. (popcount32, sprintsigmask_n): New functions. (tprintsigmask_addr, sprintsigmask_val, tprintsigmask_val): New macros. (print_sigset_addr_len, sys_sigsetmask, sys_sigreturn, sys_siggetmask, sys_sigsuspend, sys_sigprocmask, decode_new_sigaction): Update to use new signal mask decoding interface. * tests/sigaction.c (main): Add a test with almost filled signal mask. * tests/sigaction.awk: Update.	2014-02-27 00:28:39 +00:00
Dmitry V. Levin	66a15a5bb8	tests: add a test for rt_sigaction output Since "struct sigaction" varies between architectures, rt_sigaction decoding sometimes produces incorrect output. This test is expected to catch basic rt_sigaction decoding bugs. Based on a patch proposed by Chris Dearman. * tests/sigaction.c: New file. * tests/sigaction.awk: Likewise. * tests/sigaction.sh: New test. * tests/Makefile.am (check_PROGRAMS): Add sigaction. (TESTS): Add sigaction.sh. (EXTRA_DIST): Add sigaction.awk. * tests/.gitignore: Add sigaction.	2014-01-08 17:48:25 +00:00

Author

SHA1

Message

Date

Dmitry V. Levin

38a34c9349

Add copyright headers to some files which lack them

Before this change, all files that exist since 20th century had
copyright headers, while most files that appeared later didn't.  This
change fixes the inconsistency by adding missing copyright headers.

It doesn't mean that copyright headers became maintained.  In my view,
git history provides much better information on this subject and is much
more accurate than copyright headers.

2015-12-17 17:56:48 +00:00

Dmitry V. Levin

38593e942a

Rewrite signal mask decoding without sigset_t

The sigset_t provided by libc is not quite convenient.
In glibc, sigset_t is an array with space for 1024 bits, which is much
more than required: all architectures supported by Linux have only 64
signals except MIPS, which has 128.
In bionic libc, LP32 sigset_t is only 4 bytes long, which is less than
necessary.

With this change, signal mask is decoded without use of intermediate
sigset_t structure, which saves us some cpu cycles in case of glibc with
its inflated sigset_t, and enables build with libcs where sigset_t is
broken.

Old implementation used to check each signal number in the given signal
mask twice using sigismember().
New implementation is based on popcount and next_set_bit() so it's
noticeably faster.

* configure.ac: Check for __builtin_popcount.
* signal.c: Ensure that NSIG >= 32.
(sprintsigmask, sprintsigmask_long, printsigmask): Remove.
(popcount32, sprintsigmask_n): New functions.
(tprintsigmask_addr, sprintsigmask_val, tprintsigmask_val): New macros.
(print_sigset_addr_len, sys_sigsetmask, sys_sigreturn, sys_siggetmask,
sys_sigsuspend, sys_sigprocmask, decode_new_sigaction): Update to use
new signal mask decoding interface.
* tests/sigaction.c (main): Add a test with almost filled signal mask.
* tests/sigaction.awk: Update.

2014-02-27 00:28:39 +00:00

Dmitry V. Levin

66a15a5bb8

tests: add a test for rt_sigaction output

Since "struct sigaction" varies between architectures, rt_sigaction
decoding sometimes produces incorrect output.  This test is expected
to catch basic rt_sigaction decoding bugs.

Based on a patch proposed by Chris Dearman.

* tests/sigaction.c: New file.
* tests/sigaction.awk: Likewise.
* tests/sigaction.sh: New test.
* tests/Makefile.am (check_PROGRAMS): Add sigaction.
(TESTS): Add sigaction.sh.
(EXTRA_DIST): Add sigaction.awk.
* tests/.gitignore: Add sigaction.

2014-01-08 17:48:25 +00:00

3 Commits