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(unw): Initialize "lock" member. Switch to ANSI99-style initializers.

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(ia64_init): Use unw.lock to protect against races during
	initialization.  Disable signal delivery during initialization
	to ensure thread-safety (e.g., unw_init_local() may call
	ia64_init() and the former must be thread-safe).

(Logical change 1.111)
This commit is contained in:
hp.com!davidm 2003-11-19 03:11:25 +00:00
parent 3cc1ec6be9
commit 8e71bb0ab2
1 changed files with 54 additions and 39 deletions
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93
src/ia64/global-ia64.c
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@ -27,14 +27,15 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
struct ia64_global_unwind_state unw = struct ia64_global_unwind_state unw =
{ {
needs_initialization: 1, .needs_initialization = 1,
save_order: { .lock = PTHREAD_MUTEX_INITIALIZER,
.save_order = {
IA64_REG_IP, IA64_REG_PFS, IA64_REG_PSP, IA64_REG_PR, IA64_REG_IP, IA64_REG_PFS, IA64_REG_PSP, IA64_REG_PR,
IA64_REG_UNAT, IA64_REG_LC, IA64_REG_FPSR, IA64_REG_PRI_UNAT_GR IA64_REG_UNAT, IA64_REG_LC, IA64_REG_FPSR, IA64_REG_PRI_UNAT_GR
}, },
#if UNW_DEBUG #if UNW_DEBUG
debug_level: 0, .debug_level = 0,
preg_name: { .preg_name = {
"pri_unat_gr", "pri_unat_mem", "psp", "bsp", "bspstore", "pri_unat_gr", "pri_unat_mem", "psp", "bsp", "bspstore",
"ar.pfs", "ar.rnat", "rp", "ar.pfs", "ar.rnat", "rp",
"r4", "r5", "r6", "r7", "r4", "r5", "r6", "r7",
@ -73,53 +74,67 @@ ia64_init (void)
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xfe,
0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
}; };
sigset_t saved_sigmask;
uint8_t *lep, *bep; uint8_t *lep, *bep;
long i; long i;
mi_init (); sigprocmask (SIG_SETMASK, &unwi_full_sigmask, &saved_sigmask);
mutex_lock (&unw.lock);
{
if (!unw.needs_initialization)
/* another thread else beat us to it... */
goto out;
mempool_init (&unw.reg_state_pool, sizeof (struct ia64_reg_state), 0); unw.needs_initialization = 0;
mempool_init (&unw.labeled_state_pool,
sizeof (struct ia64_labeled_state), 0);
unw.r0 = 0; mi_init ();
unw.f0.raw.bits[0] = 0;
unw.f0.raw.bits[1] = 0;
lep = (uint8_t *) &unw.f1_le + 16; mempool_init (&unw.reg_state_pool, sizeof (struct ia64_reg_state), 0);
bep = (uint8_t *) &unw.f1_be; mempool_init (&unw.labeled_state_pool,
for (i = 0; i < 16; ++i) sizeof (struct ia64_labeled_state), 0);
{
*--lep = f1_bytes[i];
*bep++ = f1_bytes[i];
}
lep = (uint8_t *) &unw.nat_val_le + 16; unw.r0 = 0;
bep = (uint8_t *) &unw.nat_val_be; unw.f0.raw.bits[0] = 0;
for (i = 0; i < 16; ++i) unw.f0.raw.bits[1] = 0;
{
*--lep = nat_val_bytes[i];
*bep++ = nat_val_bytes[i];
}
lep = (uint8_t *) &unw.int_val_le + 16; lep = (uint8_t *) &unw.f1_le + 16;
bep = (uint8_t *) &unw.int_val_be; bep = (uint8_t *) &unw.f1_be;
for (i = 0; i < 16; ++i) for (i = 0; i < 16; ++i)
{ {
*--lep = int_val_bytes[i]; *--lep = f1_bytes[i];
*bep++ = int_val_bytes[i]; *bep++ = f1_bytes[i];
} }
if (8*sizeof(unw_hash_index_t) < IA64_LOG_UNW_HASH_SIZE) lep = (uint8_t *) &unw.nat_val_le + 16;
unw_hash_index_t_is_too_narrow (); bep = (uint8_t *) &unw.nat_val_be;
for (i = 0; i < 16; ++i)
{
*--lep = nat_val_bytes[i];
*bep++ = nat_val_bytes[i];
}
lep = (uint8_t *) &unw.int_val_le + 16;
bep = (uint8_t *) &unw.int_val_be;
for (i = 0; i < 16; ++i)
{
*--lep = int_val_bytes[i];
*bep++ = int_val_bytes[i];
}
if (8*sizeof(unw_hash_index_t) < IA64_LOG_UNW_HASH_SIZE)
unw_hash_index_t_is_too_narrow ();
#ifndef UNW_REMOTE_ONLY #ifndef UNW_REMOTE_ONLY
_Uia64_local_addr_space_init (); _Uia64_local_addr_space_init ();
# ifndef UNW_GENERIC_ONLY # ifndef UNW_GENERIC_ONLY
{ {
extern void _ULia64_local_addr_space_init (void); extern void _ULia64_local_addr_space_init (void);
_ULia64_local_addr_space_init (); _ULia64_local_addr_space_init ();
} }
# endif # endif
#endif #endif
}
out:
mutex_unlock (&unw.lock);
sigprocmask (SIG_SETMASK, &saved_sigmask, NULL);
} }