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| author | Florian Weimer <fweimer@redhat.com> | 2016-05-12 08:54:17 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2016-05-12 15:26:55 +0200 |
| commit | 56290d6e762c1194547e73ff0b948cd79d3a1e03 (patch) | |
| tree | c6025736ee13b24a908e7d12496d47b636592345 /ChangeLog | |
| parent | cd065b68439076971640047cc6eaada27dcfd0f7 (diff) | |
| download | glibc-56290d6e762c1194547e73ff0b948cd79d3a1e03.tar.gz glibc-56290d6e762c1194547e73ff0b948cd79d3a1e03.tar.xz glibc-56290d6e762c1194547e73ff0b948cd79d3a1e03.zip | |
Increase fork signal safety for single-threaded processes [BZ #19703]
This provides a band-aid and addresses the scenario where fork is called from a signal handler while the process is in the malloc subsystem (or has acquired the libio list lock). It does not address the general issue of async-signal-safety of fork; multi-threaded processes are not covered, and some glibc subsystems have fork handlers which are not async-signal-safe.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index dee85ca13e..e623247085 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,15 @@ 2016-05-12 Florian Weimer <fweimer@redhat.com> + [BZ #19703] + Partially async-signal-safe fork for single-threaded processes. + * sysdeps/nptl/fork.c (__libc_fork): Introduce multiple_threads + variable. Do not acquire and reset/release malloc and libio locks + in single-threaded processes. + * malloc/tst-mallocfork2.c: New file. + * malloc/Makefile (tests): Add it. + +2016-05-12 Florian Weimer <fweimer@redhat.com> + * sysdeps/posix/getaddrinfo.c (gaih_inet_serv): Add tmpbuf argument. Use scratch buffer instead of extend_alloca. (gethosts): Use scratch buffer instead of extend_alloca. |