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netbsd: add more robust error handling for sysctl HW_IOSTATS

This commit is contained in:
nia 2021-08-09 08:57:14 +02:00 committed by BenBE
parent 5b8654d341
commit 324f9d048d
1 changed files with 16 additions and 8 deletions
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24
netbsd/Platform.c
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@ -335,15 +335,23 @@ bool Platform_getDiskIO(DiskIOData* data) {
struct io_sysctl *iostats = NULL;
size_t size = 0;
/* get the size of the IO statistic array */
(void)sysctl(mib, __arraycount(mib), iostats, &size, NULL, 0);
if (size == 0)
return false;
for (int retry = 3; retry > 0; retry--) {
/* get the size of the IO statistic array */
if (sysctl(mib, __arraycount(mib), iostats, &size, NULL, 0) < 0)
CRT_fatalError("Unable to get size of io_sysctl");
iostats = xMalloc(size);
if (sysctl(mib, __arraycount(mib), iostats, &size, NULL, 0) < 0) {
free(iostats);
return false;
if (size == 0) {
free(iostats);
return false;
}
iostats = xRealloc(iostats, size);
if (sysctl(mib, __arraycount(mib), iostats, &size, NULL, 0) == 0)
break;
if (errno != ENOMEM)
CRT_fatalError("Unable to get disk IO statistics");
}
uint64_t bytesReadSum = 0;