Date: Fri, 7 May 1999 13:10:47 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Doug Rabson <dfr@nlsystems.com> Cc: current@FreeBSD.ORG Subject: Re: Debugging FreeBSD user threads with gdb Message-ID: <199905072010.NAA46817@apollo.backplane.com> References: <Pine.BSF.4.05.9905072102080.10400-100000@herring.nlsystems.com>
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:--- uthread_create.c 1999/03/23 05:07:55 1.12
:+++ uthread_create.c 1999/05/06 15:27:33
:@@ -42,6 +42,8 @@
: #include "pthread_private.h"
: #include "libc_private.h"
:
:+static int next_tid = 1;
:+
: int
: pthread_create(pthread_t * thread, const pthread_attr_t * attr,
: void *(*start_routine) (void *), void *arg)
:@@ -87,6 +89,7 @@
: } else {
: /* Initialise the thread structure: */
: memset(new_thread, 0, sizeof(struct pthread));
:+ new_thread->tid = next_tid++;
:
:Doug Rabson Mail: dfr@nlsystems.com
:Nonlinear Systems Ltd. Phone: +44 181 442 9037
Hmmm. tid is only an int and some programs which create and destroy
threads a lot are almost certainly going to overflow it. 4 billion
is not hard to reach. This can result in duplicate tid's.
-Matt
Matthew Dillon
<dillon@backplane.com>
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