[Qemu-trivial] [PATCH v6 09/10] tcg: check return value of fopen()

[zhanghailiang]

From: Li Liu <address@hidden>

Give a warning message if fopen() failed to open the log file.

Reviewed-by: Alex Bennée <address@hidden>
Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Li Liu <address@hidden>
---
 tcg/tcg.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tcg/tcg.c b/tcg/tcg.c
index c068990..8f50d2a 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2406,6 +2406,10 @@ static void dump_op_count(void)
     int i;
     FILE *f;
     f = fopen("/tmp/op.log", "w");
+    if (f == NULL) {
+        fprintf(stderr, "Failed to open /tmp/op.log\n");
+        return;
+    }
     for(i = INDEX_op_end; i < NB_OPS; i++) {
         fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, 
tcg_table_op_count[i]);
     }
-- 
1.7.12.4