glxtrace: Intercept and flush on _exit.

As suggested in
https://github.com/apitrace/apitrace/issues/479#issuecomment-239666769

3 files changed, 23 insertions, 1 deletions

diff --git a/lib/os/os_posix.cpp b/lib/os/os_posix.cpp
index 74594c3f..7b621dbd 100644
--- a/lib/os/os_posix.cpp
+++ b/lib/os/os_posix.cpp
@@ -285,7 +285,7 @@ long long timeFrequency = 0LL;
 void
 abort(void)
 {
-    _exit(1);
+    _Exit(1);
 }
 
 
diff --git a/wrappers/dlsym.cpp b/wrappers/dlsym.cpp
index d7dc0865..2eda082a 100644
--- a/wrappers/dlsym.cpp
+++ b/wrappers/dlsym.cpp
@@ -228,3 +228,24 @@ void * dlopen(const char *filename, int flag)
 
     return handle;
 }
+
+
+#ifdef __linux__
+
+#include "trace_writer_local.hpp"
+
+/*
+ * Intercept _exit so we can flush our trace even when the app (eg. Wine)
+ * aborts.
+ *
+ * TODO: Currently we dispatch to _Exit, but for completness we should
+ * intercept _Exit too.
+ */
+void
+_exit(int status)
+{
+    trace::localWriter.flush();
+    _Exit(status);
+}
+
+#endif /* __linux__ */
diff --git a/wrappers/glxtrace.version b/wrappers/glxtrace.version
index 7d7a1624..0546a05e 100644
--- a/wrappers/glxtrace.version
+++ b/wrappers/glxtrace.version
@@ -4,6 +4,7 @@
         _fini;
         gl[A-Z]*;
         dlopen;
+	_exit;
     local:
         *;
 };