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[SIGAR-84] Prevent crash when perf counters are disabled

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This commit is contained in:
Doug MacEachern 2008-01-22 22:37:07 +00:00
parent 2959b4a4ea
commit 936a8a79c5
1 changed files with 29 additions and 2 deletions
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31
src/os/win32/win32_sigar.c
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@ -29,6 +29,7 @@
#define PERFBUF_SIZE 8192
#define PERF_TITLE_PROC 230
#define PERF_TITLE_MEM_KEY "4"
#define PERF_TITLE_PROC_KEY "230"
#define PERF_TITLE_CPU_KEY "238"
#define PERF_TITLE_DISK_KEY "236"
@ -139,6 +140,25 @@ static DWORD perfbuf_grow(sigar_t *sigar)
return sigar->perfbuf_size;
}
static char *get_counter_name(char *key)
{
if (strEQ(key, PERF_TITLE_MEM_KEY)) {
return "Memory";
}
else if (strEQ(key, PERF_TITLE_PROC_KEY)) {
return "Process";
}
else if (strEQ(key, PERF_TITLE_CPU_KEY)) {
return "Processor";
}
else if (strEQ(key, PERF_TITLE_DISK_KEY)) {
return "LogicalDisk";
}
else {
return key;
}
}
static PERF_OBJECT_TYPE *get_perf_object_inst(sigar_t *sigar,
char *counter_key,
DWORD inst, DWORD *err)
@ -167,6 +187,13 @@ static PERF_OBJECT_TYPE *get_perf_object_inst(sigar_t *sigar,
}
block = (PERF_DATA_BLOCK *)sigar->perfbuf;
if (block->NumObjectTypes == 0) {
counter_key = get_counter_name(counter_key);
sigar_strerror_printf(sigar, "No %s counters defined (disabled?)",
counter_key);
*err = -1;
return NULL;
}
object = PdhFirstObject(block);
/*
@ -197,7 +224,7 @@ static int get_swap_counters(sigar_t *sigar, sigar_swap_t *swap)
{
int status;
PERF_OBJECT_TYPE *object =
get_perf_object_inst(sigar, "4" /* Memory */, 0, &status);
get_perf_object_inst(sigar, PERF_TITLE_MEM_KEY, 0, &status);
PERF_INSTANCE_DEFINITION *inst;
PERF_COUNTER_DEFINITION *counter;
BYTE *data;
@ -646,7 +673,7 @@ static PERF_INSTANCE_DEFINITION *get_cpu_instance(sigar_t *sigar,
DWORD *perf_offsets,
DWORD *num, DWORD *err)
{
PERF_OBJECT_TYPE *object = get_perf_object(sigar, "238", err);
PERF_OBJECT_TYPE *object = get_perf_object(sigar, PERF_TITLE_CPU_KEY, err);
PERF_INSTANCE_DEFINITION *inst;
PERF_COUNTER_DEFINITION *counter;
DWORD i;