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coreboot-kgpe-d16/documentation/gcov.txt

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This patch contains our local modifications for gcov-io.h and libgcov.c.
The file gcov-iov.h is taken from a gcc build (produced at compile
time). The file gcov-io.c is unchanged.
--- gcc-4.7.2/gcc/gcov-io.h 2011-12-04 10:27:19.000000000 -0800
+++ coreboot/src/lib/gcov-io.h 2013-01-12 16:45:57.000000000 -0800
@@ -163,6 +163,24 @@
#ifndef GCC_GCOV_IO_H
#define GCC_GCOV_IO_H
+#ifdef __COREBOOT__
+#define GCOV_LINKAGE /* nothing */
+/* We need the definitions for
+ BITS_PER_UNIT and
+ LONG_LONG_TYPE_SIZE
+ They are defined in gcc/defaults.h and gcc/config/<arch_depend_files>
+ (like, gcc/config/i386/i386.h). And it can be overridden by setting
+ in build scripts. Here I hardcoded the value for x86. */
+#define BITS_PER_UNIT 8
+#define LONG_LONG_TYPE_SIZE 64
+
+/* There are many gcc_assertions. Set the vaule to 1 if we want a warning
+ message if the assertion fails. */
+#ifndef ENABLE_ASSERT_CHECKING
+#define ENABLE_ASSERT_CHECKING 1
+#endif
+#endif /* __COREBOOT__ */
+
#if IN_LIBGCOV
/* About the target */
@@ -232,7 +250,9 @@
is not also used in a DSO. */
#if IN_LIBGCOV
+#ifndef __COREBOOT__
#include "tconfig.h"
+#endif /* __COREBOOT__ */
#define gcov_var __gcov_var
#define gcov_open __gcov_open
@@ -455,8 +475,10 @@
/* Register a new object file module. */
extern void __gcov_init (struct gcov_info *) ATTRIBUTE_HIDDEN;
+#ifndef __COREBOOT__
/* Called before fork, to avoid double counting. */
extern void __gcov_flush (void) ATTRIBUTE_HIDDEN;
+#endif
/* The merge function that just sums the counters. */
extern void __gcov_merge_add (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
--- gcc-4.7.2/libgcc/libgcov.c 2012-01-11 10:50:21.000000000 -0800
+++ coreboot/src/lib/libgcov.c 2013-01-16 09:45:11.000000000 -0800
@@ -25,12 +25,41 @@
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
+#define __COREBOOT__
+#ifdef __COREBOOT__
+#include <stdlib.h>
+#include <string.h>
+#include <console/console.h>
+#include <assert.h>
+typedef s32 pid_t;
+#define gcc_assert(x) ASSERT(x)
+#define fprintf(file, x...) printk(BIOS_ERR, x)
+#define alloca(size) __builtin_alloca (size)
+#include "gcov-glue.c"
+
+/* Define MACROs to be used by coreboot compilation. */
+# define L_gcov
+# define L_gcov_interval_profiler
+# define L_gcov_pow2_profiler
+# define L_gcov_one_value_profiler
+# define L_gcov_indirect_call_profiler
+# define L_gcov_average_profiler
+# define L_gcov_ior_profiler
+
+# define HAVE_CC_TLS 0
+# define __GCOV_KERNEL__
+
+# define IN_LIBGCOV 1
+# define IN_GCOV 0
+#else /* __COREBOOT__ */
#include "tconfig.h"
#include "tsystem.h"
#include "coretypes.h"
#include "tm.h"
#include "libgcc_tm.h"
+#endif /* __COREBOOT__ */
+#ifndef __COREBOOT__
#if defined(inhibit_libc)
#define IN_LIBGCOV (-1)
#else
@@ -41,6 +70,7 @@
#define GCOV_LINKAGE /* nothing */
#endif
#endif
+#endif /* __COREBOOT__ */
#include "gcov-io.h"
#if defined(inhibit_libc)
@@ -68,12 +98,17 @@
#else
+#ifndef __COREBOOT__
#include <string.h>
#if GCOV_LOCKED
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#endif
+#else
+void __gcov_merge_add(gcov_type *counters __attribute__ ((unused)),
+ unsigned n_counters __attribute__ ((unused))) {}
+#endif /* __COREBOOT__ */
#ifdef L_gcov
#include "gcov-io.c"
@@ -99,6 +134,10 @@
static int
create_file_directory (char *filename)
{
+#ifdef __COREBOOT__
+ (void) filename;
+ return 0;
+#else
#if !defined(TARGET_POSIX_IO) && !defined(_WIN32)
(void) filename;
return -1;
@@ -137,6 +176,7 @@
};
return 0;
#endif
+#endif
}
static struct gcov_fn_buffer *
@@ -279,7 +319,7 @@
struct gcov_ctr_summary *cs_ptr;
const struct gcov_ctr_info *ci_ptr;
unsigned t_ix;
- int f_ix;
+ int f_ix = 0;
gcov_unsigned_t c_num;
const char *gcov_prefix;
int gcov_prefix_strip = 0;
@@ -329,6 +369,7 @@
}
}
+#ifndef __COREBOOT__
{
/* Check if the level of dirs to strip off specified. */
char *tmp = getenv("GCOV_PREFIX_STRIP");
@@ -352,6 +393,7 @@
prefix_length--;
}
else
+#endif
prefix_length = 0;
/* If no prefix was specified and a prefix stip, then we assume
@@ -696,8 +738,10 @@
if (filename_length > gcov_max_filename)
gcov_max_filename = filename_length;
+#ifndef __COREBOOT__
if (!gcov_list)
atexit (gcov_exit);
+#endif
info->next = gcov_list;
gcov_list = info;
@@ -767,14 +811,15 @@
#ifdef L_gcov_merge_single
/* The profile merging function for choosing the most common value.
- It is given an array COUNTERS of N_COUNTERS old counters and it
- reads the same number of counters from the gcov file. The counters
- are split into 3-tuples where the members of the tuple have
- meanings:
-
- -- the stored candidate on the most common value of the measured entity
- -- counter
- -- total number of evaluations of the value */
+ * It is given an array COUNTERS of N_COUNTERS old counters and it
+ * reads the same number of counters from the gcov file. The counters
+ * are split into 3-tuples where the members of the tuple have
+ * meanings:
+ *
+ * -- the stored candidate on the most common value of the measured entity
+ * -- counter
+ * -- total number of evaluations of the value
+ */
void
__gcov_merge_single (gcov_type *counters, unsigned n_counters)
{
@@ -805,15 +850,16 @@
#ifdef L_gcov_merge_delta
/* The profile merging function for choosing the most common
- difference between two consecutive evaluations of the value. It is
- given an array COUNTERS of N_COUNTERS old counters and it reads the
- same number of counters from the gcov file. The counters are split
- into 4-tuples where the members of the tuple have meanings:
-
- -- the last value of the measured entity
- -- the stored candidate on the most common difference
- -- counter
- -- total number of evaluations of the value */
+ * difference between two consecutive evaluations of the value. It is
+ * given an array COUNTERS of N_COUNTERS old counters and it reads the
+ * same number of counters from the gcov file. The counters are split
+ * into 4-tuples where the members of the tuple have meanings:
+ *
+ * -- the last value of the measured entity
+ * -- the stored candidate on the most common difference
+ * -- counter
+ * -- total number of evaluations of the value
+ */
void
__gcov_merge_delta (gcov_type *counters, unsigned n_counters)
{
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