From 8869e1e6281139f2c12a9a774becd6c1f892274f Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Mon, 26 Aug 2013 20:52:14 +0200
Subject: [PATCH] lib/drmtest: don't complete fixtures with a longjmp

Longjmp creates havoc with stack variables of the current stackframe.
And since fixtures should be used to set up such variables creating
havoc isn't a great idea. With this I can revert a bunch of
bogus patches I've done to paper over this by moving stack variables
to be global.

The same issue is actually a feature for subtest blocks since subtests
should be independant anyway.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 lib/drmtest.c | 5 +++++
 lib/drmtest.h | 8 ++++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/lib/drmtest.c b/lib/drmtest.c
index 37d7da32..6247ef57 100644
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -666,6 +666,11 @@ bool __igt_fixture(void)
 	return true;
 }
 
+void __igt_fixture_complete(void)
+{
+	in_fixture = false;
+}
+
 void __igt_fixture_end(void)
 {
 	assert(in_fixture);
diff --git a/lib/drmtest.h b/lib/drmtest.h
index 1cada0cb..5fecb2b0 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -184,6 +184,7 @@ void igt_exit(void) __attribute__((noreturn));
 #define igt_require(expr) do { if (!(expr)) __igt_skip_check(__FILE__, __LINE__, __func__, #expr ); } while (0)
 
 bool __igt_fixture(void);
+void __igt_fixture_complete(void);
 void __igt_fixture_end(void) __attribute__((noreturn));
 /**
  * igt_fixture - annote global test fixture code
@@ -193,9 +194,12 @@ void __igt_fixture_end(void) __attribute__((noreturn));
  * enumeration (e.g. when enumerating on systemes without an intel gpu) such
  * blocks should be annotated with igt_fixture.
  */
-#define igt_fixture for (; __igt_fixture() && \
+#define igt_fixture for (int igt_tokencat(__tmpint,__LINE__) = 0; \
+			 igt_tokencat(__tmpint,__LINE__) < 1 && \
+			 __igt_fixture() && \
 			 (setjmp(igt_subtest_jmpbuf) == 0); \
-			 __igt_fixture_end())
+			 igt_tokencat(__tmpint,__LINE__) ++, \
+			 __igt_fixture_complete())
 
 /* check functions which auto-skip tests by calling igt_skip() */
 void gem_require_caching(int fd);