[Crash-utility] [PATCH v2 1/2] dynamically allocate schedulers_buf
crash can simply determinate length of xen schedulers struct.
static const struct scheduler *schedulers[] = {
...
};
Signed-off-by: Nikola Pajkovsky <npajkovsky(a)suse.cz>
---
xen_hyper.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/xen_hyper.c b/xen_hyper.c
index 27e44c6e733d..479aa1acfd43 100644
--- a/xen_hyper.c
+++ b/xen_hyper.c
@@ -435,7 +435,6 @@ xen_hyper_misc_init(void)
/*
* Do initialization for scheduler of Xen Hyper system here.
*/
-#define XEN_HYPER_SCHEDULERS_ARRAY_CNT 10
#define XEN_HYPER_SCHEDULER_NAME 1024
static void
@@ -443,7 +442,8 @@ xen_hyper_schedule_init(void)
{
ulong addr, opt_sched, schedulers, opt_name;
long scheduler_opt_name;
- long schedulers_buf[XEN_HYPER_SCHEDULERS_ARRAY_CNT];
+ long *schedulers_buf;
+ int nr_schedulers;
struct xen_hyper_sched_context *schc;
char *buf;
char opt_name_buf[XEN_HYPER_OPT_SCHED_SIZE];
@@ -469,15 +469,17 @@ xen_hyper_schedule_init(void)
XEN_HYPER_OPT_SCHED_SIZE, "opt_sched,", RETURN_ON_ERROR)) {
error(FATAL, "cannot read opt_sched,.\n");
}
+ nr_schedulers = get_array_length("schedulers", 0, 0);
+ schedulers_buf = (long *)GETBUF(nr_schedulers * sizeof(long));
schedulers = symbol_value("schedulers");
addr = schedulers;
while (xhscht->name == NULL) {
if (!readmem(addr, KVADDR, schedulers_buf,
- sizeof(long) * XEN_HYPER_SCHEDULERS_ARRAY_CNT,
- "schedulers", RETURN_ON_ERROR)) {
+ sizeof(long) * nr_schedulers,
+ "schedulers", RETURN_ON_ERROR)) {
error(FATAL, "cannot read schedulers.\n");
}
- for (i = 0; i < XEN_HYPER_SCHEDULERS_ARRAY_CNT; i++) {
+ for (i = 0; i < nr_schedulers; i++) {
if (schedulers_buf[i] == 0) {
error(FATAL, "schedule data not found.\n");
}
@@ -514,9 +516,10 @@ xen_hyper_schedule_init(void)
strncpy(xhscht->name, buf, strlen(buf));
break;
}
- addr += sizeof(long) * XEN_HYPER_SCHEDULERS_ARRAY_CNT;
+ addr += sizeof(long) * nr_schedulers;
}
FREEBUF(buf);
+ FREEBUF(schedulers_buf);
/* get schedule_data information */
if((xhscht->sched_context_array =
--
2.13.6