restructure results

1 files changed, 36 insertions, 0 deletions

diff --git a/results/classifier/zero-shot-user-mode/syscall/1716292 b/results/classifier/zero-shot-user-mode/syscall/1716292
new file mode 100644
index 000000000..1253cd970
--- /dev/null
+++ b/results/classifier/zero-shot-user-mode/syscall/1716292
@@ -0,0 +1,36 @@
+syscall: 0.526
+instruction: 0.387
+runtime: 0.087
+
+
+
+User mode emulation returns wrong value for write(fd, NULL, 0)
+
+QEMU version: latest master (fcea73709b966a7ded9efa7b106ea50c7fe9025c)
+OS version: Ubuntu 14.04.3
+Configured with: ../configure --target-list=x86_64-linux-user
+
+QEMU Linux usermode emulation does not handle write() syscalls with zero length and a null pointer correctly: on Linux this returns 0, but in emulation this returns -1.
+
+I ran into this while using an aarch64 abuild-tar from Alpine Linux in user-mode emulation; here's the minimized reproduction test case:
+
+zhuowei@zhuowei-tablet:/tmp$ cat writezerobytes.c
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int main() {
+	ssize_t ret = write(STDOUT_FILENO, NULL, 0);
+	fprintf(stderr, "write returned %ld\n", ret);
+	return 0;
+}
+zhuowei@zhuowei-tablet:/tmp$ gcc -o writezerobytes writezerobytes.c
+zhuowei@zhuowei-tablet:/tmp$ uname -a
+Linux zhuowei-tablet 3.13.0-129-generic #178-Ubuntu SMP Fri Aug 11 12:48:20 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
+zhuowei@zhuowei-tablet:/tmp$ ./writezerobytes 
+write returned 0        
+zhuowei@zhuowei-tablet:/tmp$ /media/zhuowei/redhd/docs/repos/qemu/build4/x86_64-linux-user/qemu-x86_64 ./writezerobytes
+write returned -1
+zhuowei@zhuowei-tablet:/tmp$ /media/zhuowei/redhd/docs/repos/qemu/build4/x86_64-linux-user/qemu-x86_64 --version
+qemu-x86_64 version 2.10.50 (v2.10.0-471-gfcea737-dirty)
+Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
\ No newline at end of file