tree 2b7aa6b61df86256f767e99ff848f0c39b9707fc
parent b6483f853c3d646931bfa5f859d220ef9c7e3f3c
author sewardj <sewardj@a5019735-40e9-0310-863c-91ae7b9d1cf9> 1051387875 +0000
committer sewardj <sewardj@a5019735-40e9-0310-863c-91ae7b9d1cf9> 1051387875 +0000


Fix threading problems on glibc-2.3.2 or later.  Note this is *not*
NPTL support.

The behaviour of weak vs strong symbols seems to have changed in
glibc-2.3.2.  This caused problems in coregrind/vg_intercept.c,
wherein strong symbols in vg_libpthread.c were intended to
override weak symbols in vg_intercept.c, in order to give alternative
thread-safe implementations of some functions, poll(), select(), etc.

The change involves moving the nonblocking implementations of poll, etc
into vg_intercept.c, renaming them to (eg)  VGR_(poll), and routing
all calls to poll to VGR_(poll) [dually for other such fns].  This
means even single-threaded programs now use these functions, but
that doesn't strike me as harmful.

MERGE TO STABLE, if it doesn't break anything


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@1559 a5019735-40e9-0310-863c-91ae7b9d1cf9