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First phase of memory management rewrite (see backend/utils/mmgr/README

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for details).  It doesn't really do that much yet, since there are no
short-term memory contexts in the executor, but the infrastructure is
in place and long-term contexts are handled reasonably.  A few long-
standing bugs have been fixed, such as 'VACUUM; anything' in a single
query string crashing.  Also, out-of-memory is now considered a
recoverable ERROR, not FATAL.
Eliminate a large amount of crufty, now-dead code in and around
memory management.
Fix problem with holding off SIGTRAP, SIGSEGV, etc in postmaster and
backend startup.
This commit is contained in:
Tom Lane
2000-06-28 03:33:33 +00:00
parent b601c8d882
commit 1aebc3618a
74 changed files with 2325 additions and 3296 deletions
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40
src/backend/libpq/pqsignal.c
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@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/libpq/pqsignal.c,v 1.15 2000/06/11 11:39:50 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/libpq/pqsignal.c,v 1.16 2000/06/28 03:31:41 tgl Exp $
*
* NOTES
* This shouldn't be in libpq, but the monitor and some other
@@ -44,6 +44,44 @@
#include "libpq/pqsignal.h"
/*
* Initialize BlockSig and UnBlockSig.
*
* BlockSig is the set of signals to block when we are trying to block
* signals. This includes all signals we normally expect to get, but NOT
* signals that should never be turned off.
*
* UnBlockSig is the set of signals to block when we don't want to block
* signals (is this ever nonzero??)
*/
void
pqinitmask(void)
{
#ifdef HAVE_SIGPROCMASK
sigemptyset(&UnBlockSig);
sigfillset(&BlockSig);
sigdelset(&BlockSig, SIGABRT);
sigdelset(&BlockSig, SIGILL);
sigdelset(&BlockSig, SIGSEGV);
sigdelset(&BlockSig, SIGBUS);
sigdelset(&BlockSig, SIGTRAP);
sigdelset(&BlockSig, SIGCONT);
sigdelset(&BlockSig, SIGSYS);
#else
UnBlockSig = 0;
BlockSig = sigmask(SIGHUP) | sigmask(SIGQUIT) |
sigmask(SIGTERM) | sigmask(SIGALRM) |
sigmask(SIGINT) | sigmask(SIGUSR1) |
sigmask(SIGUSR2) | sigmask(SIGCHLD) |
sigmask(SIGWINCH) | sigmask(SIGFPE);
#endif
}
/*
* Set up a signal handler
*/
pqsigfunc
pqsignal(int signo, pqsigfunc func)
{