[Qemu-devel] [PATCH v2 02/43] improve DPRINTF macros, add to savevm

["Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Improve the existing DPRINTF macros in migration.c and arch_init
by:
  1) Making them go to stderr rather than stdout (so you can run with
-nographic and redirect your debug to a file)
  2) Making them print the ms time with each debug - useful for
debugging latency issues

Add the same macro to savevm

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 arch_init.c |  5 ++++-
 migration.c | 12 ++++++++++++
 savevm.c    | 10 ++++++++++
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/arch_init.c b/arch_init.c
index 8ddaf35..eb6455a 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -53,9 +53,12 @@
 #include "hw/acpi/acpi.h"
 #include "qemu/host-utils.h"
 
+// #define DEBUG_ARCH_INIT
 #ifdef DEBUG_ARCH_INIT
 #define DPRINTF(fmt, ...) \
-    do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0)
+    do { fprintf(stderr,  "arch_init@%" PRId64 " " fmt "\n", \
+                          qemu_clock_get_ms(QEMU_CLOCK_REALTIME), \
+                          ## __VA_ARGS__); } while (0)
 #else
 #define DPRINTF(fmt, ...) \
     do { } while (0)
diff --git a/migration.c b/migration.c
index 8d675b3..e241370 100644
--- a/migration.c
+++ b/migration.c
@@ -26,6 +26,18 @@
 #include "qmp-commands.h"
 #include "trace.h"
 
+//#define DEBUG_MIGRATION
+
+#ifdef DEBUG_MIGRATION
+#define DPRINTF(fmt, ...) \
+    do { fprintf(stderr, "migration@%" PRId64 " " fmt "\n", \
+                          qemu_clock_get_ms(QEMU_CLOCK_REALTIME), \
+                          ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+    do { } while (0)
+#endif
+
 enum {
     MIG_STATE_ERROR = -1,
     MIG_STATE_NONE,
diff --git a/savevm.c b/savevm.c
index e19ae0a..c3a1f68 100644
--- a/savevm.c
+++ b/savevm.c
@@ -43,6 +43,16 @@
 #include "block/snapshot.h"
 #include "block/qapi.h"
 
+#ifdef DEBUG_SAVEVM
+#define DPRINTF(fmt, ...) \
+    do { fprintf(stderr, "savevm@%" PRId64 " " fmt "\n", \
+                          qemu_clock_get_ms(QEMU_CLOCK_REALTIME), \
+                          ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+    do { } while (0)
+#endif
+
 
 #ifndef ETH_P_RARP
 #define ETH_P_RARP 0x8035
-- 
1.9.3