Make fuzzbench debugging easier (#1574)

tokatoka · web-flow · commit 5b0e3dd3bcbe · 2023-09-29T18:32:09.000+02:00
* to make debugging easier

* debug
diff --git a/fuzzers/fuzzbench/src/lib.rs b/fuzzers/fuzzbench/src/lib.rs
@@ -386,7 +386,9 @@ fn fuzz(
     {
         let null_fd = file_null.as_raw_fd();
         dup2(null_fd, io::stdout().as_raw_fd())?;
-        dup2(null_fd, io::stderr().as_raw_fd())?;
+        if !std::env::var("LIBAFL_FUZZBENCH_DEBUG").is_ok() {
+            dup2(null_fd, io::stderr().as_raw_fd())?;
+        }
     }
     // reopen file to make sure we're at the end
     log.replace(OpenOptions::new().append(true).create(true).open(logfile)?);

Original file line number	Diff line number	Diff line change
`@@ -386,7 +386,9 @@ fn fuzz(`
`386`	`386`	`{`
`387`	`387`	`let null_fd = file_null.as_raw_fd();`
`388`	`388`	`dup2(null_fd, io::stdout().as_raw_fd())?;`
`389`		`- dup2(null_fd, io::stderr().as_raw_fd())?;`
	`389`	`+ if !std::env::var("LIBAFL_FUZZBENCH_DEBUG").is_ok() {`
	`390`	`+ dup2(null_fd, io::stderr().as_raw_fd())?;`
	`391`	`+ }`
`390`	`392`	`}`
`391`	`393`	`// reopen file to make sure we're at the end`
`392`	`394`	`log.replace(OpenOptions::new().append(true).create(true).open(logfile)?);`