executor/linux: stop dumping mount information when failed to open kcov file

Since ENOENT problem was solved by commit 318430cbb3b2ceef ("executor/linux:
change mount propagation type to private"), remove the debug code for this problem.

1 files changed, 1 insertions, 40 deletions

diff --git a/executor/executor_linux.h b/executor/executor_linux.h
index f8aed1791..e4e3ab56b 100644
--- a/executor/executor_linux.h
+++ b/executor/executor_linux.h
@@ -93,50 +93,11 @@ static intptr_t execute_syscall(const call_t* c, intptr_t a[kMaxArgs])
 	return res;
 }
 
-static void dump_dir(const char* path)
-{
-	DIR* dir = opendir(path);
-	struct dirent* d = NULL;
-	if (!dir)
-		return;
-	fprintf(stderr, "Index of %s\n", path);
-	while ((d = readdir(dir)) != NULL)
-		fprintf(stderr, "  %s\n", d->d_name);
-	closedir(dir);
-}
-
 static void cover_open(cover_t* cov, bool extra)
 {
 	int fd = open("/sys/kernel/debug/kcov", O_RDWR);
-	if (fd == -1) {
-		const int err = errno;
-		dump_dir("/");
-		dump_dir("/proc/");
-		dump_dir("/sys/");
-		if (mount("/proc/", "/proc/", "proc", 0, NULL))
-			fprintf(stderr, "Can't mount proc on /proc/\n");
-		if (chdir("/sys/"))
-			fprintf(stderr, "/sys/ does not exist.\n");
-		else if (chdir("/sys/kernel/"))
-			fprintf(stderr, "/sys/kernel/ does not exist.\n");
-		else if (chdir("/sys/kernel/debug/"))
-			fprintf(stderr, "/sys/kernel/debug/ does not exist.\n");
-		fd = open("/proc/mounts", O_RDONLY);
-		if (fd == -1) {
-			fprintf(stderr, "open of /proc/mounts failed.\n");
-			if (chdir("/proc/"))
-				fprintf(stderr, "/proc/ does not exist.\n");
-		} else {
-			static char buffer[4096];
-			int len;
-			fprintf(stderr, "Content of /proc/mounts\n");
-			while ((len = read(fd, buffer, sizeof(buffer))) > 0)
-				fwrite(buffer, 1, len, stderr);
-			close(fd);
-		}
-		errno = err;
+	if (fd == -1)
 		fail("open of /sys/kernel/debug/kcov failed");
-	}
 	if (dup2(fd, cov->fd) < 0)
 		fail("filed to dup2(%d, %d) cover fd", fd, cov->fd);
 	close(fd);