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emulator: Guard interrupt status with mutex lock

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This prevents an interrupt from being triggered when we happen to be
enabling/disabling global interrupt.

BUG=chrome-os-partner:19235
TEST=Repeatedly run interrupt test
BRANCH=None

Change-Id: I0163aff801ddbcee4aedba7a78966d97336c79ca
Signed-off-by: Vic (Chun-Ju) Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/181920
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
This commit is contained in:
Vic (Chun-Ju) Yang
2014-01-08 15:28:53 +08:00
committed by chrome-internal-fetch
parent 61d2652ca4
commit 10081abeb6
1 changed files with 8 additions and 2 deletions
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10
core/host/task.c
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@@ -121,12 +121,16 @@ int in_interrupt_context(void)
void interrupt_disable(void)
{
pthread_mutex_lock(&interrupt_lock);
interrupt_disabled = 1;
pthread_mutex_unlock(&interrupt_lock);
}
void interrupt_enable(void)
{
pthread_mutex_lock(&interrupt_lock);
interrupt_disabled = 0;
pthread_mutex_unlock(&interrupt_lock);
}
static void _task_execute_isr(int sig)
@@ -210,9 +214,11 @@ static void task_register_interrupt(void)
void task_trigger_test_interrupt(void (*isr)(void))
{
if (interrupt_disabled)
return;
pthread_mutex_lock(&interrupt_lock);
if (interrupt_disabled) {
pthread_mutex_unlock(&interrupt_lock);
return;
}
/* Suspend current task and excute ISR */
pending_isr = isr;