diff options
Diffstat (limited to 'winsup/cygwin/mcount.c')
| -rw-r--r-- | winsup/cygwin/mcount.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/winsup/cygwin/mcount.c b/winsup/cygwin/mcount.c index fad672881..6111b355a 100644 --- a/winsup/cygwin/mcount.c +++ b/winsup/cygwin/mcount.c @@ -41,6 +41,7 @@ static char rcsid[] = "$OpenBSD: mcount.c,v 1.6 1997/07/23 21:11:27 kstailey Exp #endif #include <sys/types.h> #include "gmon.h" +#include "winsup.h" /* * mcount is called on entry to each function compiled with the profiling @@ -70,11 +71,12 @@ _MCOUNT_DECL (size_t frompc, size_t selfpc) p = &_gmonparam; /* * check that we are profiling - * and that we aren't recursively invoked. + * and that we aren't recursively invoked by this thread + * or entered anew by any other thread. */ - if (p->state != GMON_PROF_ON) + if (InterlockedCompareExchange ( + &p->state, GMON_PROF_BUSY, GMON_PROF_ON) != GMON_PROF_ON) return; - p->state = GMON_PROF_BUSY; /* * check that frompcindex is a reasonable pc value. * for example: signal catchers get called from the stack, @@ -162,10 +164,10 @@ _MCOUNT_DECL (size_t frompc, size_t selfpc) } } done: - p->state = GMON_PROF_ON; + InterlockedExchange (&p->state, GMON_PROF_ON); return; overflow: - p->state = GMON_PROF_ERROR; + InterlockedExchange (&p->state, GMON_PROF_ERROR); return; } |