Hello Martin,
On 23/03/2022 13:19, Martin Liška wrote:
On 3/23/22 10:34, Sebastian Huber wrote:
Hello.
Thanks for the patch. Note we're in stage4, so the patch can eventually go
in in the next stage1.
ok, good.
The gcov_profile_merge() already had code to deal with profile
information
which had no counterpart to merge with. For profile information from
files
with no associated counterpart, the profile information is simply used
as is
with the weighting transformation applied. Make sure that
gcov_profile_merge()
works with an empty target profile list. Return the merged profile list.
Can you please provide a simple demo with a pair of profiles
where I'll see what changes?
The background for this feature is that I would like to combine the gcov
information obtained from several test executables. Each test executable
will print something like this (log.txt):
*** BEGIN OF GCOV INFO ***
/home/EB/sebastian_h/src/lwip/b-xilinx_zynq_a9_qemu/init.gcda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...
*** END OF GCOV INFO ***
The attached script reads the log file and creates the *.gcda files
using gcov-tool. Initially, the target files do not exist.
gcc/
* gcov-tool.cc (gcov_profile_merge): Adjust return type.
(profile_merge): Allow merging of directories which contain no
profile
files.
libgcc/
* libgcov-util.c (gcov_profile_merge): Return the list of merged
profiles. Accept empty target and source profile lists.
---
gcc/gcov-tool.cc | 27 ++++++++++-----------------
libgcc/libgcov-util.c | 15 +++++++++------
2 files changed, 19 insertions(+), 23 deletions(-)
diff --git a/gcc/gcov-tool.cc b/gcc/gcov-tool.cc
index f4e42ae763c..2e4083a664d 100644
--- a/gcc/gcov-tool.cc
+++ b/gcc/gcov-tool.cc
@@ -40,7 +40,8 @@ see the files COPYING3 and COPYING.RUNTIME
respectively. If not, see
#endif
#include <getopt.h>
-extern int gcov_profile_merge (struct gcov_info*, struct gcov_info*,
int, int);
+extern struct gcov_info *gcov_profile_merge (struct gcov_info*,
+ struct gcov_info*, int, int);
extern int gcov_profile_overlap (struct gcov_info*, struct gcov_info*);
extern int gcov_profile_normalize (struct gcov_info*, gcov_type);
extern int gcov_profile_scale (struct gcov_info*, float, int, int);
@@ -141,26 +142,18 @@ profile_merge (const char *d1, const char *d2,
const char *out, int w1, int w2)
{
struct gcov_info *d1_profile;
struct gcov_info *d2_profile;
- int ret;
+ struct gcov_info *merged_profile;
d1_profile = gcov_read_profile_dir (d1, 0);
- if (!d1_profile)
- return 1;
-
- if (d2)
- {
- d2_profile = gcov_read_profile_dir (d2, 0);
- if (!d2_profile)
- return 1;
+ d2_profile = gcov_read_profile_dir (d2, 0);
Is it fine calling 'gcov_read_profile_dir (d2, 0)' without 'if (d2)'?
Yes, the caller ensures that d1 and d2 are both provided:
if (argc - optind != 2)
merge_usage ();
return profile_merge (argv[optind], argv[optind+1], output_dir, w1, w2);
Maybe we should provide a better error message, if the user doesn't
provide two directories instead of the general usage message.
- /* The actual merge: we overwrite to d1_profile. */
- ret = gcov_profile_merge (d1_profile, d2_profile, w1, w2);
+ /* The actual merge: we overwrite to d1_profile. */
+ merged_profile = gcov_profile_merge (d1_profile, d2_profile, w1, w2);
- if (ret)
- return ret;
- }
-
- gcov_output_files (out, d1_profile);
+ if (merged_profile)
+ gcov_output_files (out, merged_profile);
+ else if (verbose)
+ fnotice (stdout, "no profile files were merged\n");
return 0;
}
diff --git a/libgcc/libgcov-util.c b/libgcc/libgcov-util.c
index ba7fb924b53..e5496f4ade2 100644
--- a/libgcc/libgcov-util.c
+++ b/libgcc/libgcov-util.c
@@ -677,13 +677,13 @@ find_match_gcov_info (struct gcov_info **array,
int size,
Return 0 on success: without mismatch.
Reutrn 1 on error. */
Please adjust the function comment.
Oh, yes.
--
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Herr Sebastian HUBER
Dornierstr. 4
82178 Puchheim
Germany
email: sebastian.hu...@embedded-brains.de
phone: +49-89-18 94 741 - 16
fax: +49-89-18 94 741 - 08
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Unsere Datenschutzerklärung finden Sie hier:
https://embedded-brains.de/datenschutzerklaerung/
#!/usr/bin/env python
# SPDX-License-Identifier: BSD-2-Clause
""" Read log file and create *.gcda files. """
# Copyright (C) 2022 embedded brains GmbH (http://www.embedded-brains.de)
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import base64
import os
import subprocess
import sys
import tempfile
def _longest_common_prefix(names):
names = sorted(names)
try:
shortest = names[0]
except KeyError:
return ""
prefix = ""
longest = names[-1]
for idx, char in enumerate(shortest):
if longest[idx] == char:
prefix += char
else:
break
return prefix
gcov_info = {}
for name in sys.argv[1:]:
with open(name, "r") as log:
after = log.read().split("*** BEGIN OF GCOV INFO ***")[1]
before = after.split("*** END OF GCOV INFO ***")[0]
for block in before.split("\n\n"):
if block:
gcov_file, gcov_data = block.split("\n", 1)
gcov_info[gcov_file] = base64.b64decode(gcov_data)
prefix = _longest_common_prefix(gcov_info.keys())
with tempfile.TemporaryDirectory() as tmp_dir:
for gcov_file, gcov_data in gcov_info.items():
name = os.path.join(tmp_dir, gcov_file[len(prefix):])
print(name)
os.makedirs(os.path.dirname(name), exist_ok=True)
with open(name, "wb") as out:
out.write(gcov_data)
subprocess.run(["gcov-tool", "merge", "-v", "-o", prefix, prefix, tmp_dir])
*** BEGIN OF GCOV INFO ***
/home/EB/sebastian_h/src/lwip/b-xilinx_zynq_a9_qemu/init.gcda
YWRjZ1IzMEKtLjW3AAAAAQMAAADcaps855EX05p4KUUAAKEBOgAAAAEAAAAAAAAAAQAAAAAAAAAB
AAAAAAAAAAEAAAAAAAAAAQAAAAAAAAABAAAAAAAAAAEAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAEA
AAAAAAAAAQAAAAAAAAABAAAAAAAAAAEAAAAAAAAAAQAAAAAAAAABAAAAAAAAAAEAAAAAAAAAAQAA
AAAAAAABAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAABAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAEAAAAAAAAAAQAAAAAAAAABAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAABAwAAACXn3k16
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2wAAoQECAAAAAQAAAAAAAAAAAAABAwAAAIvy4CE9FxuM6Old2wAAoQECAAAAAQAAAAAAAAAAAAAB
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AAAAAQAAAAAAAAAAAAABAwAAAKSSXEjQFDluuIMwpAAAoQH+////AAAAAA==
/home/EB/sebastian_h/src/lwip/b-xilinx_zynq_a9_qemu/iodumpgcovinfo.gcda
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/home/EB/sebastian_h/src/lwip/b-xilinx_zynq_a9_qemu/src/core/inet_chksum.gcda
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*** END OF GCOV INFO ***
