/* Store last executed instruction on each vCPU as a GString */
static GPtrArray *last_exec;
-static GMutex expand_array_lock;
+static GRWLock expand_array_lock;
static GPtrArray *imatches;
static GArray *amatches;
* Expand last_exec array.
*
* As we could have multiple threads trying to do this we need to
- * serialise the expansion under a lock. Threads accessing already
- * created entries can continue without issue even if the ptr array
- * gets reallocated during resize.
+ * serialise the expansion under a lock.
*/
static void expand_last_exec(int cpu_index)
{
- g_mutex_lock(&expand_array_lock);
+ g_rw_lock_writer_lock(&expand_array_lock);
while (cpu_index >= last_exec->len) {
GString *s = g_string_new(NULL);
g_ptr_array_add(last_exec, s);
}
- g_mutex_unlock(&expand_array_lock);
+ g_rw_lock_writer_unlock(&expand_array_lock);
}
/**
GString *s;
/* Find vCPU in array */
+ g_rw_lock_reader_lock(&expand_array_lock);
g_assert(cpu_index < last_exec->len);
s = g_ptr_array_index(last_exec, cpu_index);
+ g_rw_lock_reader_unlock(&expand_array_lock);
/* Indicate type of memory access */
if (qemu_plugin_mem_is_store(info)) {
GString *s;
/* Find or create vCPU in array */
+ g_rw_lock_reader_lock(&expand_array_lock);
if (cpu_index >= last_exec->len) {
+ g_rw_lock_reader_unlock(&expand_array_lock);
expand_last_exec(cpu_index);
+ g_rw_lock_reader_lock(&expand_array_lock);
}
s = g_ptr_array_index(last_exec, cpu_index);
+ g_rw_lock_reader_unlock(&expand_array_lock);
/* Print previous instruction in cache */
if (s->len) {