Check RUBY_THREAD_TIMESLICE value

nobu · nobu · commit 57f6329ba7aa · 2024-12-18T11:12:34.000+09:00
diff --git a/thread.c b/thread.c
@@ -5511,7 +5511,13 @@ Init_Thread(void)
     const char * ptr = getenv("RUBY_THREAD_TIMESLICE");
 
     if (ptr) {
-        thread_default_quantum_ms = (uint32_t)strtol(ptr, NULL, 0);
+        long quantum = strtol(ptr, NULL, 0);
+        if (quantum > 0 && quantum <= UINT32_MAX) {
+            thread_default_quantum_ms = (uint32_t)quantum;
+        }
+        else if (0) {
+            fprintf(stderr, "Ignored RUBY_THREAD_TIMESLICE=%s\n", ptr);
+        }
     }
 
     {

Original file line number	Diff line number	Diff line change
`@@ -5511,7 +5511,13 @@ Init_Thread(void)`
`5511`	`5511`	`const char * ptr = getenv("RUBY_THREAD_TIMESLICE");`
`5512`	`5512`
`5513`	`5513`	`if (ptr) {`
`5514`		`- thread_default_quantum_ms = (uint32_t)strtol(ptr, NULL, 0);`
	`5514`	`+ long quantum = strtol(ptr, NULL, 0);`
	`5515`	`+ if (quantum > 0 && quantum <= UINT32_MAX) {`
	`5516`	`+ thread_default_quantum_ms = (uint32_t)quantum;`
	`5517`	`+ }`
	`5518`	`+ else if (0) {`
	`5519`	`+ fprintf(stderr, "Ignored RUBY_THREAD_TIMESLICE=%s\n", ptr);`
	`5520`	`+ }`
`5515`	`5521`	`}`
`5516`	`5522`
`5517`	`5523`	`{`