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On Darwin, detect and report a multithreaded postmaster.

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Darwin --enable-nls builds use a substitute setlocale() that may start a
thread.  Buildfarm member orangutan experienced BackendList corruption
on account of different postmaster threads executing signal handlers
simultaneously.  Furthermore, a multithreaded postmaster risks undefined
behavior from sigprocmask() and fork().  Emit LOG messages about the
problem and its workaround.  Back-patch to 9.0 (all supported versions).
This commit is contained in:
Noah Misch
2015-01-07 22:35:44 -05:00
parent 05bb4fcad4
commit 8dc83104ed
5 changed files with 61 additions and 2 deletions
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3
src/include/pg_config.h.in
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@@ -393,6 +393,9 @@
/* Define if you have POSIX threads libraries and header files. */
#undef HAVE_PTHREAD
/* Define to 1 if you have the `pthread_is_threaded_np' function. */
#undef HAVE_PTHREAD_IS_THREADED_NP
/* Define to 1 if you have the <pwd.h> header file. */
#undef HAVE_PWD_H