Try ubsan together with asan

uNetworkingAB · web-flow · commit 44247fe0bce5 · 2026-04-04T04:24:39.000+02:00
diff --git a/build.c b/build.c
@@ -74,8 +74,8 @@ int main(int argc, char **argv) {
 
     // WITH_ASAN builds with sanitizers
     if (env_is("WITH_ASAN", "1")) {
-        strcat(CXXFLAGS, " -fsanitize=address -g");
-        strcat(LDFLAGS, " -lasan");
+        strcat(CXXFLAGS, " -fsanitize=address,undefined -g");
+        strcat(LDFLAGS, " -lasan -lubsan");
     }
 
     if (!strcmp(argv[1], "examples")) {

Original file line number	Diff line number	Diff line change
`@@ -74,8 +74,8 @@ int main(int argc, char **argv) {`
`74`	`74`
`75`	`75`	`// WITH_ASAN builds with sanitizers`
`76`	`76`	`if (env_is("WITH_ASAN", "1")) {`
`77`		`- strcat(CXXFLAGS, " -fsanitize=address -g");`
`78`		`- strcat(LDFLAGS, " -lasan");`
	`77`	`+ strcat(CXXFLAGS, " -fsanitize=address,undefined -g");`
	`78`	`+ strcat(LDFLAGS, " -lasan -lubsan");`
`79`	`79`	`}`
`80`	`80`
`81`	`81`	`if (!strcmp(argv[1], "examples")) {`