From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: =?UTF-8?q?Renaud=20M=C3=A9trich?= <rmetrich@redhat.com>

Date: Sat, 23 Nov 2019 14:57:41 +0100

Subject: [PATCH] New --with-debug-timestamps configure flag to prepend debug

 traces with absolute and relative timestamp

MIME-Version: 1.0

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Content-Transfer-Encoding: 8bit

Signed-off-by: Renaud Métrich <rmetrich@redhat.com>

---

 configure.ac          | 18 ++++++++++++++++++

 grub-core/kern/misc.c | 20 ++++++++++++++++++++

 config.h.in           |  1 +

 3 files changed, 39 insertions(+)

diff --git a/configure.ac b/configure.ac

index 9323c1254..0059b938a 100644

--- a/configure.ac

+++ b/configure.ac

@@ -1514,6 +1514,17 @@ else

 fi

 AC_SUBST([BOOT_TIME_STATS])

+AC_ARG_WITH([debug-timestamps],

+	   AS_HELP_STRING([--with-debug-timestamps],

+                          [prepend debug traces with absolute and relative timestamps]))

+

+if test x$with_debug_timestamps = xyes; then

+  DEBUG_WITH_TIMESTAMPS=1

+else

+  DEBUG_WITH_TIMESTAMPS=0

+fi

+AC_SUBST([DEBUG_WITH_TIMESTAMPS])

+

 AC_ARG_ENABLE([grub-emu-sdl],

 	      [AS_HELP_STRING([--enable-grub-emu-sdl],

                              [build and install the `grub-emu' debugging utility with SDL support (default=guessed)])])

@@ -2092,6 +2103,7 @@ AM_CONDITIONAL([COND_APPLE_LINKER], [test x$TARGET_APPLE_LINKER = x1])

 AM_CONDITIONAL([COND_ENABLE_EFIEMU], [test x$enable_efiemu = xyes])

 AM_CONDITIONAL([COND_ENABLE_CACHE_STATS], [test x$DISK_CACHE_STATS = x1])

 AM_CONDITIONAL([COND_ENABLE_BOOT_TIME_STATS], [test x$BOOT_TIME_STATS = x1])

+AM_CONDITIONAL([COND_DEBUG_WITH_TIMESTAMPS], [test x$DEBUG_WITH_TIMESTAMPS = x1])

 AM_CONDITIONAL([COND_HAVE_CXX], [test x$HAVE_CXX = xyes])

@@ -2187,6 +2199,12 @@ else

 echo With boot time statistics: No

 fi

+if [ x"$with_debug_timestamps" = xyes ]; then

+echo Debug traces with timestamps: Yes

+else

+echo Debug traces with timestamps: No

+fi

+

 if [ x"$efiemu_excuse" = x ]; then

 echo efiemu runtime: Yes

 else

diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c

index c034f49f9..11f2974fc 100644

--- a/grub-core/kern/misc.c

+++ b/grub-core/kern/misc.c

@@ -25,6 +25,9 @@

 #include <grub/env.h>

 #include <grub/i18n.h>

 #include <grub/backtrace.h>

+#if DEBUG_WITH_TIMESTAMPS

+#include <grub/time.h>

+#endif

 union printf_arg

 {

@@ -179,9 +182,26 @@ grub_real_dprintf (const char *file, const int line, const char *condition,

 		   const char *fmt, ...)

 {

   va_list args;

+#if DEBUG_WITH_TIMESTAMPS

+  static long unsigned int last_time = 0;

+  static int last_had_cr = 1;

+#endif

   if (grub_debug_enabled (condition))

     {

+#if DEBUG_WITH_TIMESTAMPS

+      /* Don't print timestamp if last printed message isn't terminated yet */

+      if (last_had_cr) {

+        long unsigned int tmabs = (long unsigned int) grub_get_time_ms();

+        long unsigned int tmrel = tmabs - last_time;

+        last_time = tmabs;

+        grub_printf ("%3lu.%03lus +%2lu.%03lus ", tmabs / 1000, tmabs % 1000, tmrel / 1000, tmrel % 1000);

+      }

+      if (fmt[grub_strlen(fmt)-1] == '\n')

+        last_had_cr = 1;

+      else

+        last_had_cr = 0;

+#endif

       grub_printf ("%s:%d: ", file, line);

       va_start (args, fmt);

       grub_vprintf (fmt, args);

diff --git a/config.h.in b/config.h.in

index 9e8f9911b..d15480b41 100644

--- a/config.h.in

+++ b/config.h.in

@@ -12,6 +12,7 @@

 /* Define to 1 to enable disk cache statistics.  */

 #define DISK_CACHE_STATS @DISK_CACHE_STATS@

 #define BOOT_TIME_STATS @BOOT_TIME_STATS@

+#define DEBUG_WITH_TIMESTAMPS @DEBUG_WITH_TIMESTAMPS@

 /* We don't need those.  */

 #define MINILZO_CFG_SKIP_LZO_PTR 1