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src/hotspot/cpu/x86/vm_version_ext_x86.cpp
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rev 50985 : 8206977: Minor improvements of runtime code.
Reviewed-by: coleenp, lfoltan
@@ -468,23 +468,22 @@
return OS_OK;
}
size_t VM_Version_Ext::cpu_write_support_string(char* const buf, size_t buf_len) {
- assert(buf != NULL, "buffer is NULL!");
- assert(buf_len > 0, "buffer len not enough!");
+ guarantee(buf != NULL, "buffer is NULL!");
+ guarantee(buf_len > 0, "buffer len not enough!");
unsigned int flag = 0;
unsigned int fi = 0;
size_t written = 0;
const char* prefix = "";
#define WRITE_TO_BUF(string) \
{ \
int res = jio_snprintf(&buf[written], buf_len - written, "%s%s", prefix, string); \
- if (res < 0 || (size_t) res >= buf_len - 1) { \
- buf[buf_len-1] = '\0'; \
+ if (res < 0) { \
return buf_len - 1; \
} \
written += res; \
if (prefix[0] == '\0') { \
prefix = ", "; \
@@ -590,11 +589,11 @@
_cpuid_info.ext_cpuid1_ebx,
_cpuid_info.ext_cpuid1_ecx,
_cpuid_info.ext_cpuid1_edx);
if (outputLen < 0 || (size_t) outputLen >= buf_len - 1) {
- buf[buf_len-1] = '\0';
+ if (buf_len > 0) { buf[buf_len-1] = '\0'; }
return OS_ERR;
}
cpu_write_support_string(&buf[outputLen], buf_len - outputLen);
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