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2000-04-25  Ulrich Drepper  <drepper@redhat.com>

	* elf/dl-profile.c (_dl_mcount): Try to be thread-safe while not
	setting the state to GMON_PROF_BUSY.
This commit is contained in:
Ulrich Drepper 2000-04-25 07:40:56 +00:00
parent 128e2b0f0e
commit d472655c75
4 changed files with 28 additions and 11 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2000-04-25 Ulrich Drepper <drepper@redhat.com>
* elf/dl-profile.c (_dl_mcount): Try to be thread-safe while not
setting the state to GMON_PROF_BUSY.
2000-04-24 Ulrich Drepper <drepper@redhat.com>
* elf/dl-profile.c (_dl_start_profile): define all variables which

25
elf/dl-profile.c
View File

@ -154,11 +154,11 @@ struct here_fromstruct
uint16_t link;
};
static uint16_t *tos;
static volatile uint16_t *tos;
static struct here_fromstruct *froms;
static size_t fromlimit;
static size_t fromidx;
static uint32_t fromlimit;
static volatile uint32_t fromidx;
static uintptr_t lowpc;
static size_t textsize;
@ -431,12 +431,15 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
void
_dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc)
{
uint16_t *topcindex;
volatile uint16_t *topcindex;
size_t i, fromindex;
struct here_fromstruct *fromp;
#if 0
/* XXX I think this is now not necessary anymore. */
if (! compare_and_swap (&state, GMON_PROF_ON, GMON_PROF_BUSY))
return;
#endif
/* Compute relative addresses. The shared object can be loaded at
any address. The value of frompc could be anything. We cannot
@ -491,31 +494,32 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc)
size_t newfromidx;
to_index = (data[narcs].self_pc
/ (hashfraction * sizeof (*tos)));
newfromidx = fromidx++;
newfromidx = exchange_and_add (&fromidx, 1) + 1;
froms[newfromidx].here = &data[narcs];
froms[newfromidx].link = tos[to_index];
tos[to_index] = newfromidx;
++narcs;
atomic_add (&narcs, 1);
}
/* If we still have no entry stop searching and insert. */
if (*topcindex == 0)
{
size_t newarc = 1 + exchange_and_add (narcsp, 1);
uint_fast32_t newarc = 1 + exchange_and_add (narcsp, 1);
/* In rare cases it could happen that all entries in FROMS are
occupied. So we cannot count this anymore. */
if (newarc >= fromlimit)
goto done;
fromp = &froms[*topcindex = fromidx++];
*topcindex = exchange_and_add (&fromidx, 1) + 1;
fromp = &froms[*topcindex];
fromp->here = &data[newarc];
data[newarc].from_pc = frompc;
data[newarc].self_pc = selfpc;
data[newarc].count = 0;
fromp->link = 0;
++narcs;
atomic_add (&narcs, 1);
break;
}
@ -531,5 +535,8 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc)
atomic_add (&fromp->here->count, 1);
done:
#if 0
/* XXX See above, Shouldn't be necessary anymore. */
state = GMON_PROF_ON;
#endif
}

5
linuxthreads/ChangeLog
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@ -1,3 +1,8 @@
2000-04-25 Ulrich Drepper <drepper@redhat.com>
* sysdeps/i386/i686/pt-machine.h: Do not use "../useldt.h" for
now. First gcc must be fixed (more concrete: libgcc).
2000-04-24 Ulrich Drepper <drepper@redhat.com>
* pthread.c: Remove special treatement for interrupt handlers on x86.

4
linuxthreads/sysdeps/i386/i686/pt-machine.h
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@ -1,6 +1,6 @@
/* Machine-dependent pthreads configuration and inline functions.
i686 version.
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <rth@tamu.edu>.
@ -64,4 +64,4 @@ __compare_and_swap (long int *p, long int oldval, long int newval)
/* Use the LDT implementation only if the kernel is fixed. */
#include "../useldt.h"
//#include "../useldt.h"