[Qemu-devel] [PATCH] mttcg: translate-all: Enable locking debug in a debug build

[Pranith Kumar <bobby.prani@gmail.com>]

Enable tcg lock debug asserts in a debug build by default instead of
relying on DEBUG_LOCKING. None of the other DEBUG_* macros have
asserts, so this patch removes DEBUG_LOCKING and enable these asserts
in a debug build.

CC: Richard Henderson <rth@twiddle.net>
CC: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
---
 translate-all.c | 49 ++++++++++++-------------------------------------
 1 file changed, 12 insertions(+), 37 deletions(-)

diff --git a/translate-all.c b/translate-all.c
index cf828aa..a3325dc 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -60,7 +60,6 @@
 
 /* #define DEBUG_TB_INVALIDATE */
 /* #define DEBUG_TB_FLUSH */
-/* #define DEBUG_LOCKING */
 /* make various TB consistency checks */
 /* #define DEBUG_TB_CHECK */
 
@@ -75,24 +74,10 @@
  * access to the memory related structures are protected with the
  * mmap_lock.
  */
-#ifdef DEBUG_LOCKING
-#define DEBUG_MEM_LOCKS 1
-#else
-#define DEBUG_MEM_LOCKS 0
-#endif
-
 #ifdef CONFIG_SOFTMMU
-#define assert_memory_lock() do {           \
-        if (DEBUG_MEM_LOCKS) {              \
-            g_assert(have_tb_lock);         \
-        }                                   \
-    } while (0)
+#define assert_memory_lock() tcg_debug_assert(have_tb_lock)
 #else
-#define assert_memory_lock() do {               \
-        if (DEBUG_MEM_LOCKS) {                  \
-            g_assert(have_mmap_lock());         \
-        }                                       \
-    } while (0)
+#define assert_memory_lock() tcg_debug_assert(have_mmap_lock())
 #endif
 
 #define SMC_BITMAP_USE_THRESHOLD 10
@@ -172,16 +157,19 @@ static void page_table_config_init(void)
     assert(v_l2_levels >= 0);
 }
 
+#define assert_tb_locked() tcg_debug_assert(have_tb_lock)
+#define assert_tb_unlocked() tcg_debug_assert(!have_tb_lock)
+
 void tb_lock(void)
 {
-    assert(!have_tb_lock);
+    assert_tb_unlocked();
     qemu_mutex_lock(&tcg_ctx.tb_ctx.tb_lock);
     have_tb_lock++;
 }
 
 void tb_unlock(void)
 {
-    assert(have_tb_lock);
+    assert_tb_locked();
     have_tb_lock--;
     qemu_mutex_unlock(&tcg_ctx.tb_ctx.tb_lock);
 }
@@ -194,19 +182,6 @@ void tb_lock_reset(void)
     }
 }
 
-#ifdef DEBUG_LOCKING
-#define DEBUG_TB_LOCKS 1
-#else
-#define DEBUG_TB_LOCKS 0
-#endif
-
-#define assert_tb_lock() do {               \
-        if (DEBUG_TB_LOCKS) {               \
-            g_assert(have_tb_lock);         \
-        }                                   \
-    } while (0)
-
-
 static TranslationBlock *tb_find_pc(uintptr_t tc_ptr);
 
 void cpu_gen_init(void)
@@ -840,7 +815,7 @@ static TranslationBlock *tb_alloc(target_ulong pc)
 {
     TranslationBlock *tb;
 
-    assert_tb_lock();
+    assert_tb_locked();
 
     if (tcg_ctx.tb_ctx.nb_tbs >= tcg_ctx.code_gen_max_blocks) {
         return NULL;
@@ -855,7 +830,7 @@ static TranslationBlock *tb_alloc(target_ulong pc)
 /* Called with tb_lock held.  */
 void tb_free(TranslationBlock *tb)
 {
-    assert_tb_lock();
+    assert_tb_locked();
 
     /* In practice this is mostly used for single use temporary TB
        Ignore the hard cases and just back up if this TB happens to
@@ -1097,7 +1072,7 @@ void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr)
     uint32_t h;
     tb_page_addr_t phys_pc;
 
-    assert_tb_lock();
+    assert_tb_locked();
 
     atomic_set(&tb->invalid, true);
 
@@ -1412,7 +1387,7 @@ static void tb_invalidate_phys_range_1(tb_page_addr_t start, tb_page_addr_t end)
 #ifdef CONFIG_SOFTMMU
 void tb_invalidate_phys_range(tb_page_addr_t start, tb_page_addr_t end)
 {
-    assert_tb_lock();
+    assert_tb_locked();
     tb_invalidate_phys_range_1(start, end);
 }
 #else
@@ -1455,7 +1430,7 @@ void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
 #endif /* TARGET_HAS_PRECISE_SMC */
 
     assert_memory_lock();
-    assert_tb_lock();
+    assert_tb_locked();
 
     p = page_find(start >> TARGET_PAGE_BITS);
     if (!p) {
-- 
2.10.2