[PATCH 0/1] MR4635: ntdll: Avoid abort process when internal string printing function used for debugging.

[江仪 陈 (＠meshine)]

Description: The printing function (non-Windows application call) used by Wine developers
is unnecessary to abort process when the string is super long. For example, the developer
 prints a long commandline of wwmapp.exe by MESSAGE. As a result, the process cannot be
started, and the conference function cannot be used.

Signed-off-by: chenjiangyi 
Change-Id: If06f0309f9745777f89b07dff8d302cb34b2a90e

[PATCH 1/1] ntdll: Avoid abort process when internal string printing function used for debugging.

[chenjiangyi]

From: chenjiangyi

Description: The printing function (non-Windows application call) used by Wine developers
is unnecessary to abort process when the string is super long. For example, the developer
 prints a long commandline of wwmapp.exe by MESSAGE. As a result, the process cannot be
started, and the conference function cannot be used.

Signed-off-by: chenjiangyi 
Change-Id: If06f0309f9745777f89b07dff8d302cb34b2a90e
---
 dlls/ntdll/unix/debug.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/dlls/ntdll/unix/debug.c b/dlls/ntdll/unix/debug.c
index e73ee05fc03..26d1f7a76f7 100644
--- a/dlls/ntdll/unix/debug.c
+++ b/dlls/ntdll/unix/debug.c
@@ -81,12 +81,15 @@ static int append_output( struct debug_info *info, const char *str, size_t len )
 {
     if (len >= sizeof(info->output) - info->out_pos)
     {
-       fprintf( stderr, "wine_dbg_output: debugstr buffer overflow (contents: '%s')\n", info->output );
-       info->out_pos = 0;
-       abort();
+       fprintf( stderr, "wine_dbg_output: string to be output exceeds the debugstr buffer and to be truncated !!!\n");
+       len = sizeof(info->output) - info->out_pos - 1;
+       info->output[sizeof(info->output) - 1] = 0;
+    }
+    if(len)
+    {
+        memcpy( info->output + info->out_pos, str, len );
+        info->out_pos += len;
     }
-    memcpy( info->output + info->out_pos, str, len );
-    info->out_pos += len;
     return len;
 }