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linux: ensure that all CPUs have model information

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Tim Bradshaw 2012-12-20 22:26:34 +00:00 committed by Ben Noordhuis
parent 98bcddc8dd
commit bc0c61cd7f
1 changed files with 22 additions and 0 deletions
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22
src/unix/linux/linux-core.c
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@ -550,11 +550,13 @@ static void read_models(unsigned int numcpus, uv_cpu_info_t* ci) {
static const char model_marker[] = "";
static const char speed_marker[] = "";
#endif
static const char bogus_model[] = "unknown";
unsigned int model_idx;
unsigned int speed_idx;
char buf[1024];
char* model;
FILE* fp;
char* inferred_model;
fp = fopen("/proc/cpuinfo", "r");
if (fp == NULL)
@ -583,6 +585,26 @@ static void read_models(unsigned int numcpus, uv_cpu_info_t* ci) {
}
}
fclose(fp);
/* Now we want to make sure that all the models contain *something*:
* it's not safe to leave them as null.
*/
if (model_idx == 0) {
/* No models at all: fake up the first one. */
ci[0].model = strndup(bogus_model, sizeof(bogus_model) - 1);
model_idx = 1;
}
/* Not enough models, but we do have at least one. So we'll just
* copy the rest down: it might be better to indicate somehow that
* the remaining ones have been guessed.
*/
inferred_model = ci[model_idx - 1].model;
while (model_idx < numcpus) {
ci[model_idx].model = strndup(inferred_model, strlen(inferred_model));
model_idx++;
}
}