Patchwork [google/gcc-4.8] Port gcov intermediate format from google/gcc-4.7

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Submitter Sharad Singhai
Date May 24, 2013, 9:32 p.m.
Message ID <CAKxPW65ALAZ91XUe0xVfwiuB+yvem6=t2Q48h4sVsJU8OFC88w@mail.gmail.com>
Download mbox | patch
Permalink /patch/246291/
State New
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Comments

Sharad Singhai - May 24, 2013, 9:32 p.m.
Hi,

This patch forward ports r175134 from google/gcc-4.7 into
google/gcc-4.8. The intermediate format is a bit simplified. I am also
planning to propose this for trunk in a separate message.

Bootstrapped and tested on x86_64. Okay for google/gcc-4_8?

Thanks,
Sharad

2013-05-24   Sharad Singhai  <singhai@google.com>

* gcov.c (print_usage): Handle new options.
(process_args): Handle new options.
(get_gcov_file_intermediate_name): New function.
(output_intermediate_file): New function.
(generate_results): Handle new option.
(release_function): Relase demangled name.
(read_graph_file): Handle demangled name.
(output_lines): Ditto.
* doc/gcov.texi: Document gcov intermediate format.

testsuite/ChangeLog:

2013-05-24   Sharad Singhai  <singhai@google.com>

* g++.dg/gcov/gcov-8.C: New testcase.
* lib/gcov.exp: Handle intermediate format.


 @command{gcov} should be run with the current directory the same as that
Xinliang David Li - May 25, 2013, 2:42 a.m.
On Fri, May 24, 2013 at 2:32 PM, Sharad Singhai <singhai@google.com> wrote:
>        if (flag_gcov_file)
>   {
> -  char *gcov_file_name
> -    = make_gcov_file_name (file_name, src->coverage.name);
> +          if (flag_intermediate_format)
> +            /* Output the intermediate format without requiring source
> +               files.  This outputs a section to a *single* file.  */
> +            output_intermediate_file (gcov_file_intermediate, src);

Is there an indentation issue here?



> +          else
> +            {
> +              char *gcov_file_name
> +                = make_gcov_file_name (file_name, src->coverage.name);
>


Try to avoid the following format only changes by reorganization --
for instance refactor the following part into a helper function.

Ok for google branch with those change.  Please submit the change to trunk asap.

thanks,

David

> -  if (src->coverage.lines)
> -    {
> -      FILE *gcov_file = fopen (gcov_file_name, "w");
> +              if (src->coverage.lines)
> +                {
> +                  FILE *gcov_file = fopen (gcov_file_name, "w");
>
> -      if (gcov_file)
> - {
> -  fnotice (stdout, "Creating '%s'\n", gcov_file_name);
> -  output_lines (gcov_file, src);
> -  if (ferror (gcov_file))
> -    fnotice (stderr, "Error writing output file '%s'\n",
> -     gcov_file_name);
> -  fclose (gcov_file);
> - }
> -      else
> - fnotice (stderr, "Could not open output file '%s'\n",
> - gcov_file_name);
> -    }
> -  else
> -    {
> -      unlink (gcov_file_name);
> -      fnotice (stdout, "Removing '%s'\n", gcov_file_name);
> -    }
> -  free (gcov_file_name);
> - }
> -      fnotice (stdout, "\n");
> +                  if (gcov_file)
> +                    {
> +                      fnotice (stdout, "Creating '%s'\n", gcov_file_name);
> +                      output_lines (gcov_file, src);
> +                      if (ferror (gcov_file))
> +                        fnotice (stderr, "Error writing output file '%s'\n",
> +                                 gcov_file_name);
> +                      fclose (gcov_file);
> +                    }
> +                  else
> +                    fnotice (stderr, "Could not open output file '%s'\n",
> +                             gcov_file_name);
> +                }
> +              else
> +                {
> +                  unlink (gcov_file_name);
> +                  fnotice (stdout, "Removing '%s'\n", gcov_file_name);
> +                }
> +              free (gcov_file_name);
> +            }
> +          fnotice (stdout, "\n");
> +        }
>      }
>
> +  if (flag_gcov_file && flag_intermediate_format)
> +    {
> +      /* Now we've finished writing the intermediate file.  */
> +      fclose (gcov_file_intermediate);
> +      XDELETEVEC (gcov_file_intermediate_name);
> +    }
> +
>    if (!file_name)
>      executed_summary (total_lines, total_executed);
>  }
> @@ -766,6 +914,9 @@ release_function (function_t *fn)
>      }
>    free (fn->blocks);
>    free (fn->counts);
> +  if (flag_demangled_names && fn->demangled_name != fn->name)
> +    free (fn->demangled_name);
> +  free (fn->name);
>  }
>
>  /* Release all memory used.  */
> @@ -1051,6 +1202,12 @@ read_graph_file (void)
>
>    fn = XCNEW (function_t);
>    fn->name = function_name;
> +          if (flag_demangled_names)
> +            {
> +              fn->demangled_name = cplus_demangle (fn->name, DMGL_PARAMS);
> +              if (!fn->demangled_name)
> +                fn->demangled_name = fn->name;
> +            }
>    fn->ident = ident;
>    fn->lineno_checksum = lineno_checksum;
>    fn->cfg_checksum = cfg_checksum;
> @@ -2280,7 +2437,8 @@ output_lines (FILE *gcov_file, const source_t *src
>      if (arc->fake)
>        return_count -= arc->count;
>
> -  fprintf (gcov_file, "function %s", fn->name);
> +  fprintf (gcov_file, "function %s", flag_demangled_names ?
> +                   fn->demangled_name : fn->name);
>    fprintf (gcov_file, " called %s",
>     format_gcov (called_count, 0, -1));
>    fprintf (gcov_file, " returned %s",
> Index: doc/gcov.texi
> ===================================================================
> --- doc/gcov.texi (revision 199269)
> +++ doc/gcov.texi (working copy)
> @@ -131,6 +131,8 @@ gcov [@option{-v}|@option{--version}] [@option{-h}
>       [@option{-o}|@option{--object-directory} @var{directory|file}]
>       [@option{-s}|@option{--source-prefix} @var{directory}]
>       [@option{-d}|@option{--display-progress}]
> +     [@option{-i}|@option{--intermediate-format}]
> +     [@option{-m}|@option{--demangled-names}]
>       @var{files}
>  @c man end
>  @c man begin SEEALSO
> @@ -232,6 +234,50 @@ Unconditional branches are normally not interestin
>  @itemx --display-progress
>  Display the progress on the standard output.
>
> +@item -i
> +@itemx --intermediate-format
> +Output gcov file in an easy-to-parse intermediate text format that can
> +be used by @command{lcov} or other tools. The output is a single
> +@file{.gcov} file per @file{.gcda} file. No source code is required.
> +
> +The format of the intermediate @file{.gcov} file is plain text with
> +one entry per line
> +
> +@smallexample
> +file:@var{source_file_name}
> +function:@var{line_number},@var{execution_count},@var{function_name}
> +lcount:@var{line number},@var{execution_count}
> +branch:@var{line_number},@var{branch_coverage_type}
> +
> +Where the @var{branch_coverage_type} is
> +   notexec (Branch not executed)
> +   taken (Branch executed and taken)
> +   nottaken (Branch executed, but not taken)
> +
> +There can be multiple @var{file} entries in an intermediate gcov
> +file. All entries following a @var{file} pertain to that source file
> +until the next @var{file} entry.
> +@end smallexample
> +
> +Here is a sample when @option{-i} is used in conjuction with
> @option{-b} option:
> +
> +@smallexample
> +file:array.cc
> +function:11,1,_Z3sumRKSt6vectorIPiSaIS0_EE
> +function:22,1,main
> +lcount:11,1
> +lcount:12,1
> +lcount:14,1
> +branch:14,taken
> +lcount:26,1
> +branch:28,nottaken
> +@end smallexample
> +
> +@item -m
> +@itemx --demangled-names
> +Display demangled function names in output. The default is to show
> +mangled function names.
> +
>  @end table
>
>  @command{gcov} should be run with the current directory the same as that
Sharad Singhai - May 28, 2013, 6:45 p.m.
On Fri, May 24, 2013 at 7:42 PM, Xinliang David Li <davidxl@google.com> wrote:
> On Fri, May 24, 2013 at 2:32 PM, Sharad Singhai <singhai@google.com> wrote:
>>        if (flag_gcov_file)
>>   {
>> -  char *gcov_file_name
>> -    = make_gcov_file_name (file_name, src->coverage.name);
>> +          if (flag_intermediate_format)
>> +            /* Output the intermediate format without requiring source
>> +               files.  This outputs a section to a *single* file.  */
>> +            output_intermediate_file (gcov_file_intermediate, src);
>
> Is there an indentation issue here?

Yes, fixed.

>
>
>
>> +          else
>> +            {
>> +              char *gcov_file_name
>> +                = make_gcov_file_name (file_name, src->coverage.name);
>>
>
>
> Try to avoid the following format only changes by reorganization --
> for instance refactor the following part into a helper function.

Fixed by adding helper function 'output_gcov_file'.

>
> Ok for google branch with those change.  Please submit the change to trunk asap.

Proposed for trunk in
http://gcc.gnu.org/ml/gcc-patches/2013-05/msg01657.html. I will commit
this patch to google 4.8 branch after one more round of testing.

Thanks,
Sharad

>
> thanks,
>
> David
>
>> -  if (src->coverage.lines)
>> -    {
>> -      FILE *gcov_file = fopen (gcov_file_name, "w");
>> +              if (src->coverage.lines)
>> +                {
>> +                  FILE *gcov_file = fopen (gcov_file_name, "w");
>>
>> -      if (gcov_file)
>> - {
>> -  fnotice (stdout, "Creating '%s'\n", gcov_file_name);
>> -  output_lines (gcov_file, src);
>> -  if (ferror (gcov_file))
>> -    fnotice (stderr, "Error writing output file '%s'\n",
>> -     gcov_file_name);
>> -  fclose (gcov_file);
>> - }
>> -      else
>> - fnotice (stderr, "Could not open output file '%s'\n",
>> - gcov_file_name);
>> -    }
>> -  else
>> -    {
>> -      unlink (gcov_file_name);
>> -      fnotice (stdout, "Removing '%s'\n", gcov_file_name);
>> -    }
>> -  free (gcov_file_name);
>> - }
>> -      fnotice (stdout, "\n");
>> +                  if (gcov_file)
>> +                    {
>> +                      fnotice (stdout, "Creating '%s'\n", gcov_file_name);
>> +                      output_lines (gcov_file, src);
>> +                      if (ferror (gcov_file))
>> +                        fnotice (stderr, "Error writing output file '%s'\n",
>> +                                 gcov_file_name);
>> +                      fclose (gcov_file);
>> +                    }
>> +                  else
>> +                    fnotice (stderr, "Could not open output file '%s'\n",
>> +                             gcov_file_name);
>> +                }
>> +              else
>> +                {
>> +                  unlink (gcov_file_name);
>> +                  fnotice (stdout, "Removing '%s'\n", gcov_file_name);
>> +                }
>> +              free (gcov_file_name);
>> +            }
>> +          fnotice (stdout, "\n");
>> +        }
>>      }
>>
>> +  if (flag_gcov_file && flag_intermediate_format)
>> +    {
>> +      /* Now we've finished writing the intermediate file.  */
>> +      fclose (gcov_file_intermediate);
>> +      XDELETEVEC (gcov_file_intermediate_name);
>> +    }
>> +
>>    if (!file_name)
>>      executed_summary (total_lines, total_executed);
>>  }
>> @@ -766,6 +914,9 @@ release_function (function_t *fn)
>>      }
>>    free (fn->blocks);
>>    free (fn->counts);
>> +  if (flag_demangled_names && fn->demangled_name != fn->name)
>> +    free (fn->demangled_name);
>> +  free (fn->name);
>>  }
>>
>>  /* Release all memory used.  */
>> @@ -1051,6 +1202,12 @@ read_graph_file (void)
>>
>>    fn = XCNEW (function_t);
>>    fn->name = function_name;
>> +          if (flag_demangled_names)
>> +            {
>> +              fn->demangled_name = cplus_demangle (fn->name, DMGL_PARAMS);
>> +              if (!fn->demangled_name)
>> +                fn->demangled_name = fn->name;
>> +            }
>>    fn->ident = ident;
>>    fn->lineno_checksum = lineno_checksum;
>>    fn->cfg_checksum = cfg_checksum;
>> @@ -2280,7 +2437,8 @@ output_lines (FILE *gcov_file, const source_t *src
>>      if (arc->fake)
>>        return_count -= arc->count;
>>
>> -  fprintf (gcov_file, "function %s", fn->name);
>> +  fprintf (gcov_file, "function %s", flag_demangled_names ?
>> +                   fn->demangled_name : fn->name);
>>    fprintf (gcov_file, " called %s",
>>     format_gcov (called_count, 0, -1));
>>    fprintf (gcov_file, " returned %s",
>> Index: doc/gcov.texi
>> ===================================================================
>> --- doc/gcov.texi (revision 199269)
>> +++ doc/gcov.texi (working copy)
>> @@ -131,6 +131,8 @@ gcov [@option{-v}|@option{--version}] [@option{-h}
>>       [@option{-o}|@option{--object-directory} @var{directory|file}]
>>       [@option{-s}|@option{--source-prefix} @var{directory}]
>>       [@option{-d}|@option{--display-progress}]
>> +     [@option{-i}|@option{--intermediate-format}]
>> +     [@option{-m}|@option{--demangled-names}]
>>       @var{files}
>>  @c man end
>>  @c man begin SEEALSO
>> @@ -232,6 +234,50 @@ Unconditional branches are normally not interestin
>>  @itemx --display-progress
>>  Display the progress on the standard output.
>>
>> +@item -i
>> +@itemx --intermediate-format
>> +Output gcov file in an easy-to-parse intermediate text format that can
>> +be used by @command{lcov} or other tools. The output is a single
>> +@file{.gcov} file per @file{.gcda} file. No source code is required.
>> +
>> +The format of the intermediate @file{.gcov} file is plain text with
>> +one entry per line
>> +
>> +@smallexample
>> +file:@var{source_file_name}
>> +function:@var{line_number},@var{execution_count},@var{function_name}
>> +lcount:@var{line number},@var{execution_count}
>> +branch:@var{line_number},@var{branch_coverage_type}
>> +
>> +Where the @var{branch_coverage_type} is
>> +   notexec (Branch not executed)
>> +   taken (Branch executed and taken)
>> +   nottaken (Branch executed, but not taken)
>> +
>> +There can be multiple @var{file} entries in an intermediate gcov
>> +file. All entries following a @var{file} pertain to that source file
>> +until the next @var{file} entry.
>> +@end smallexample
>> +
>> +Here is a sample when @option{-i} is used in conjuction with
>> @option{-b} option:
>> +
>> +@smallexample
>> +file:array.cc
>> +function:11,1,_Z3sumRKSt6vectorIPiSaIS0_EE
>> +function:22,1,main
>> +lcount:11,1
>> +lcount:12,1
>> +lcount:14,1
>> +branch:14,taken
>> +lcount:26,1
>> +branch:28,nottaken
>> +@end smallexample
>> +
>> +@item -m
>> +@itemx --demangled-names
>> +Display demangled function names in output. The default is to show
>> +mangled function names.
>> +
>>  @end table
>>
>>  @command{gcov} should be run with the current directory the same as that
Sharad Singhai - May 28, 2013, 8:17 p.m.
All tests passed. Committed as r199390 in google/gcc-4_8.

Thanks,
Sharad

On Tue, May 28, 2013 at 11:45 AM, Sharad Singhai <singhai@google.com> wrote:
> On Fri, May 24, 2013 at 7:42 PM, Xinliang David Li <davidxl@google.com> wrote:
>> On Fri, May 24, 2013 at 2:32 PM, Sharad Singhai <singhai@google.com> wrote:
>>>        if (flag_gcov_file)
>>>   {
>>> -  char *gcov_file_name
>>> -    = make_gcov_file_name (file_name, src->coverage.name);
>>> +          if (flag_intermediate_format)
>>> +            /* Output the intermediate format without requiring source
>>> +               files.  This outputs a section to a *single* file.  */
>>> +            output_intermediate_file (gcov_file_intermediate, src);
>>
>> Is there an indentation issue here?
>
> Yes, fixed.
>
>>
>>
>>
>>> +          else
>>> +            {
>>> +              char *gcov_file_name
>>> +                = make_gcov_file_name (file_name, src->coverage.name);
>>>
>>
>>
>> Try to avoid the following format only changes by reorganization --
>> for instance refactor the following part into a helper function.
>
> Fixed by adding helper function 'output_gcov_file'.
>
>>
>> Ok for google branch with those change.  Please submit the change to trunk asap.
>
> Proposed for trunk in
> http://gcc.gnu.org/ml/gcc-patches/2013-05/msg01657.html. I will commit
> this patch to google 4.8 branch after one more round of testing.
>
> Thanks,
> Sharad
>
>>
>> thanks,
>>
>> David
>>
>>> -  if (src->coverage.lines)
>>> -    {
>>> -      FILE *gcov_file = fopen (gcov_file_name, "w");
>>> +              if (src->coverage.lines)
>>> +                {
>>> +                  FILE *gcov_file = fopen (gcov_file_name, "w");
>>>
>>> -      if (gcov_file)
>>> - {
>>> -  fnotice (stdout, "Creating '%s'\n", gcov_file_name);
>>> -  output_lines (gcov_file, src);
>>> -  if (ferror (gcov_file))
>>> -    fnotice (stderr, "Error writing output file '%s'\n",
>>> -     gcov_file_name);
>>> -  fclose (gcov_file);
>>> - }
>>> -      else
>>> - fnotice (stderr, "Could not open output file '%s'\n",
>>> - gcov_file_name);
>>> -    }
>>> -  else
>>> -    {
>>> -      unlink (gcov_file_name);
>>> -      fnotice (stdout, "Removing '%s'\n", gcov_file_name);
>>> -    }
>>> -  free (gcov_file_name);
>>> - }
>>> -      fnotice (stdout, "\n");
>>> +                  if (gcov_file)
>>> +                    {
>>> +                      fnotice (stdout, "Creating '%s'\n", gcov_file_name);
>>> +                      output_lines (gcov_file, src);
>>> +                      if (ferror (gcov_file))
>>> +                        fnotice (stderr, "Error writing output file '%s'\n",
>>> +                                 gcov_file_name);
>>> +                      fclose (gcov_file);
>>> +                    }
>>> +                  else
>>> +                    fnotice (stderr, "Could not open output file '%s'\n",
>>> +                             gcov_file_name);
>>> +                }
>>> +              else
>>> +                {
>>> +                  unlink (gcov_file_name);
>>> +                  fnotice (stdout, "Removing '%s'\n", gcov_file_name);
>>> +                }
>>> +              free (gcov_file_name);
>>> +            }
>>> +          fnotice (stdout, "\n");
>>> +        }
>>>      }
>>>
>>> +  if (flag_gcov_file && flag_intermediate_format)
>>> +    {
>>> +      /* Now we've finished writing the intermediate file.  */
>>> +      fclose (gcov_file_intermediate);
>>> +      XDELETEVEC (gcov_file_intermediate_name);
>>> +    }
>>> +
>>>    if (!file_name)
>>>      executed_summary (total_lines, total_executed);
>>>  }
>>> @@ -766,6 +914,9 @@ release_function (function_t *fn)
>>>      }
>>>    free (fn->blocks);
>>>    free (fn->counts);
>>> +  if (flag_demangled_names && fn->demangled_name != fn->name)
>>> +    free (fn->demangled_name);
>>> +  free (fn->name);
>>>  }
>>>
>>>  /* Release all memory used.  */
>>> @@ -1051,6 +1202,12 @@ read_graph_file (void)
>>>
>>>    fn = XCNEW (function_t);
>>>    fn->name = function_name;
>>> +          if (flag_demangled_names)
>>> +            {
>>> +              fn->demangled_name = cplus_demangle (fn->name, DMGL_PARAMS);
>>> +              if (!fn->demangled_name)
>>> +                fn->demangled_name = fn->name;
>>> +            }
>>>    fn->ident = ident;
>>>    fn->lineno_checksum = lineno_checksum;
>>>    fn->cfg_checksum = cfg_checksum;
>>> @@ -2280,7 +2437,8 @@ output_lines (FILE *gcov_file, const source_t *src
>>>      if (arc->fake)
>>>        return_count -= arc->count;
>>>
>>> -  fprintf (gcov_file, "function %s", fn->name);
>>> +  fprintf (gcov_file, "function %s", flag_demangled_names ?
>>> +                   fn->demangled_name : fn->name);
>>>    fprintf (gcov_file, " called %s",
>>>     format_gcov (called_count, 0, -1));
>>>    fprintf (gcov_file, " returned %s",
>>> Index: doc/gcov.texi
>>> ===================================================================
>>> --- doc/gcov.texi (revision 199269)
>>> +++ doc/gcov.texi (working copy)
>>> @@ -131,6 +131,8 @@ gcov [@option{-v}|@option{--version}] [@option{-h}
>>>       [@option{-o}|@option{--object-directory} @var{directory|file}]
>>>       [@option{-s}|@option{--source-prefix} @var{directory}]
>>>       [@option{-d}|@option{--display-progress}]
>>> +     [@option{-i}|@option{--intermediate-format}]
>>> +     [@option{-m}|@option{--demangled-names}]
>>>       @var{files}
>>>  @c man end
>>>  @c man begin SEEALSO
>>> @@ -232,6 +234,50 @@ Unconditional branches are normally not interestin
>>>  @itemx --display-progress
>>>  Display the progress on the standard output.
>>>
>>> +@item -i
>>> +@itemx --intermediate-format
>>> +Output gcov file in an easy-to-parse intermediate text format that can
>>> +be used by @command{lcov} or other tools. The output is a single
>>> +@file{.gcov} file per @file{.gcda} file. No source code is required.
>>> +
>>> +The format of the intermediate @file{.gcov} file is plain text with
>>> +one entry per line
>>> +
>>> +@smallexample
>>> +file:@var{source_file_name}
>>> +function:@var{line_number},@var{execution_count},@var{function_name}
>>> +lcount:@var{line number},@var{execution_count}
>>> +branch:@var{line_number},@var{branch_coverage_type}
>>> +
>>> +Where the @var{branch_coverage_type} is
>>> +   notexec (Branch not executed)
>>> +   taken (Branch executed and taken)
>>> +   nottaken (Branch executed, but not taken)
>>> +
>>> +There can be multiple @var{file} entries in an intermediate gcov
>>> +file. All entries following a @var{file} pertain to that source file
>>> +until the next @var{file} entry.
>>> +@end smallexample
>>> +
>>> +Here is a sample when @option{-i} is used in conjuction with
>>> @option{-b} option:
>>> +
>>> +@smallexample
>>> +file:array.cc
>>> +function:11,1,_Z3sumRKSt6vectorIPiSaIS0_EE
>>> +function:22,1,main
>>> +lcount:11,1
>>> +lcount:12,1
>>> +lcount:14,1
>>> +branch:14,taken
>>> +lcount:26,1
>>> +branch:28,nottaken
>>> +@end smallexample
>>> +
>>> +@item -m
>>> +@itemx --demangled-names
>>> +Display demangled function names in output. The default is to show
>>> +mangled function names.
>>> +
>>>  @end table
>>>
>>>  @command{gcov} should be run with the current directory the same as that

Patch

Index: testsuite/g++.dg/gcov/gcov-8.C
===================================================================
--- testsuite/g++.dg/gcov/gcov-8.C (revision 0)
+++ testsuite/g++.dg/gcov/gcov-8.C (revision 0)
@@ -0,0 +1,35 @@ 
+/* Verify that intermediate coverage format can be generated for
simple code. */
+
+/* { dg-options "-fprofile-arcs -ftest-coverage" } */
+/* { dg-do run { target native } } */
+
+class C {
+public:
+  C()
+  {
+    i = 0;
+  }
+  ~C() {}
+  void seti (int j)
+  {
+    if (j > 0)
+      i = j;
+    else
+      i = 0;
+  }
+private:
+  int i;
+};
+
+void foo()
+{
+  C c;
+  c.seti (1);
+}
+
+int main()
+{
+  foo();
+}
+
+/* { dg-final { run-gcov intermediate { -i -b gcov-8.C } } } */
Index: testsuite/lib/gcov.exp
===================================================================
--- testsuite/lib/gcov.exp (revision 199269)
+++ testsuite/lib/gcov.exp (working copy)
@@ -70,7 +70,62 @@  proc verify-lines { testname testcase file } {
     return $failed
 }

+
 #
+# verify-intermediate -- check that intermediate file has certain lines
+#
+# TESTNAME is the name of the test, including unique flags.
+# TESTCASE is the name of the test.
+# FILE is the name of the gcov output file.
+#
+# Checks are very loose, they are based on certain tags being present
+# in the output. They do not check for exact expected execution
+# counts. For that the regular gcov format should be checked.
+#
+proc verify-intermediate { testname testcase file } {
+    set failed 0
+    set srcfile 0
+    set function 0
+    set lcount 0
+    set branch 0
+    set fd [open $file r]
+    while { [gets $fd line] >= 0 } {
+ if [regexp "^file:" $line] {
+    incr srcfile
+ }
+ if [regexp "^function:(\[0-9\]+),(\[0-9\]+),.*" $line] {
+    incr function
+ }
+ if [regexp "^lcount:(\[0-9\]+),(\[0-9\]+)" $line] {
+    incr lcount
+ }
+ if [regexp "^branch:(\[0-9\]+),(taken|nottaken|notexec)" $line] {
+    incr branch
+ }
+    }
+
+    # We should see at least one tag of each type
+    if {$srcfile == 0} {
+ fail "$testname expected 'file:' tag not found"
+ incr failed
+    }
+    if {$function == 0} {
+ fail "$testname expected 'function:' tag not found"
+ incr failed
+    }
+    if {$lcount == 0} {
+ fail "$testname expected 'lcount:' tag not found"
+ incr failed
+    }
+    if {$branch == 0} {
+ fail "$testname expected 'branch:' tag not found"
+ incr failed
+    }
+    return $failed
+}
+
+
+#
 # verify-branches -- check that branch percentages are as expected
 #
 # TESTNAME is the name of the test, including unique flags.
@@ -248,6 +303,8 @@  proc run-gcov { args } {
     set gcov_args ""
     set gcov_verify_calls 0
     set gcov_verify_branches 0
+    set gcov_verify_lines 1
+    set gcov_verify_intermediate 0
     set gcov_execute_xfail ""
     set gcov_verify_xfail ""
     set xfailed 0
@@ -257,6 +314,11 @@  proc run-gcov { args } {
   set gcov_verify_calls 1
  } elseif { $a == "branches" } {
   set gcov_verify_branches 1
+ } elseif { $a == "intermediate" } {
+  set gcov_verify_intermediate 1
+  set gcov_verify_calls 0
+  set gcov_verify_branches 0
+  set gcov_verify_lines 0
  } elseif { $gcov_args == "" } {
     set gcov_args $a
  } else {
@@ -297,7 +359,12 @@  proc run-gcov { args } {
     remote_upload host $testcase.gcov $testcase.gcov

     # Check that line execution counts are as expected.
-    set lfailed [verify-lines $testname $testcase $testcase.gcov]
+    if { $gcov_verify_lines } {
+ # Check that line execution counts are as expected.
+ set lfailed [verify-lines $testname $testcase $testcase.gcov]
+    } else {
+ set lfailed 0
+    }

     # If requested via the .x file, check that branch and call information
     # is correct.
@@ -311,15 +378,21 @@  proc run-gcov { args } {
     } else {
  set cfailed 0
     }
+    if { $gcov_verify_intermediate } {
+ # Check that intermediate format has the expected format
+ set ifailed [verify-intermediate $testname $testcase $testcase.gcov]
+    } else {
+ set ifailed 0
+    }

     # Report whether the gcov test passed or failed.  If there were
     # multiple failures then the message is a summary.
-    set tfailed [expr $lfailed + $bfailed + $cfailed]
+    set tfailed [expr $lfailed + $bfailed + $cfailed + $ifailed]
     if { $xfailed } {
  setup_xfail "*-*-*"
     }
     if { $tfailed > 0 } {
- fail "$testname gcov: $lfailed failures in line counts, $bfailed in
branch percentages, $cfailed in return percentages"
+ fail "$testname gcov: $lfailed failures in line counts, $bfailed in
branch percentages, $cfailed in return percentages, $ifailed in
intermediate format"
     } else {
  pass "$testname gcov"
  clean-gcov $testcase
Index: gcov.c
===================================================================
--- gcov.c (revision 199269)
+++ gcov.c (working copy)
@@ -37,6 +37,7 @@  along with Gcov; see the file COPYING3.  If not se
 #include "intl.h"
 #include "diagnostic.h"
 #include "version.h"
+#include "demangle.h"

 #include <getopt.h>

@@ -168,6 +169,7 @@  typedef struct function_info
 {
   /* Name of function.  */
   char *name;
+  char *demangled_name;
   unsigned ident;
   unsigned lineno_checksum;
   unsigned cfg_checksum;
@@ -325,6 +327,14 @@  static int flag_gcov_file = 1;

 static int flag_display_progress = 0;

+/* Output *.gcov file in intermediate format used by 'lcov'.  */
+
+static int flag_intermediate_format = 0;
+
+/* Output demangled function names.  */
+
+static int flag_demangled_names = 0;
+
 /* For included files, make the gcov output file name include the name
    of the input source file.  For example, if x.h is included in a.c,
    then the output file name is a.c##x.h.gcov instead of x.h.gcov.  */
@@ -461,21 +471,23 @@  print_usage (int error_p)
   fnotice (file, "Usage: gcov [OPTION]... SOURCE|OBJ...\n\n");
   fnotice (file, "Print code coverage information.\n\n");
   fnotice (file, "  -h, --help                      Print this help,
then exit\n");
-  fnotice (file, "  -v, --version                   Print version
number, then exit\n");
   fnotice (file, "  -a, --all-blocks                Show information
for every basic block\n");
   fnotice (file, "  -b, --branch-probabilities      Include branch
probabilities in output\n");
-  fnotice (file, "  -c, --branch-counts             Given counts of
branches taken\n\
+  fnotice (file, "  -c, --branch-counts             Output counts of
branches taken\n\
                                     rather than percentages\n");
-  fnotice (file, "  -n, --no-output                 Do not create an
output file\n");
+  fnotice (file, "  -d, --display-progress          Display progress
information\n");
+  fnotice (file, "  -f, --function-summaries        Output summaries
for each function\n");
+  fnotice (file, "  -i, --intermediate-format       Output .gcov file
in intermediate text format\n");
   fnotice (file, "  -l, --long-file-names           Use long output
file names for included\n\
                                     source files\n");
-  fnotice (file, "  -f, --function-summaries        Output summaries
for each function\n");
+  fnotice (file, "  -m, --demangled-names           Output demangled
function names\n");
+  fnotice (file, "  -n, --no-output                 Do not create an
output file\n");
   fnotice (file, "  -o, --object-directory DIR|FILE Search for object
files in DIR or called FILE\n");
+  fnotice (file, "  -p, --preserve-paths            Preserve all
pathname components\n");
+  fnotice (file, "  -r, --relative-only             Only show data
for relative sources\n");
   fnotice (file, "  -s, --source-prefix DIR         Source prefix to elide\n");
-  fnotice (file, "  -r, --relative-only             Only show data
for relative sources\n");
-  fnotice (file, "  -p, --preserve-paths            Preserve all
pathname components\n");
   fnotice (file, "  -u, --unconditional-branches    Show
unconditional branch counts too\n");
-  fnotice (file, "  -d, --display-progress          Display progress
information\n");
+  fnotice (file, "  -v, --version                   Print version
number, then exit\n");
   fnotice (file, "\nFor bug reporting instructions, please see:\n%s.\n",
    bug_report_url);
   exit (status);
@@ -503,9 +515,11 @@  static const struct option options[] =
   { "all-blocks",           no_argument,       NULL, 'a' },
   { "branch-probabilities", no_argument,       NULL, 'b' },
   { "branch-counts",        no_argument,       NULL, 'c' },
+  { "intermediate-format",  no_argument,       NULL, 'i' },
   { "no-output",            no_argument,       NULL, 'n' },
   { "long-file-names",      no_argument,       NULL, 'l' },
   { "function-summaries",   no_argument,       NULL, 'f' },
+  { "demangled-names",      no_argument,       NULL, 'm' },
   { "preserve-paths",       no_argument,       NULL, 'p' },
   { "relative-only",        no_argument,       NULL, 'r' },
   { "object-directory",     required_argument, NULL, 'o' },
@@ -523,7 +537,7 @@  process_args (int argc, char **argv)
 {
   int opt;

-  while ((opt = getopt_long (argc, argv, "abcdfhlno:s:pruv", options, NULL)) !=
+  while ((opt = getopt_long (argc, argv, "abcdfhilmno:s:pruv",
options, NULL)) !=
          -1)
     {
       switch (opt)
@@ -546,6 +560,9 @@  process_args (int argc, char **argv)
  case 'l':
   flag_long_names = 1;
   break;
+ case 'm':
+  flag_demangled_names = 1;
+  break;
  case 'n':
   flag_gcov_file = 0;
   break;
@@ -565,6 +582,10 @@  process_args (int argc, char **argv)
  case 'u':
   flag_unconditional = 1;
   break;
+ case 'i':
+          flag_intermediate_format = 1;
+          flag_gcov_file = 1;
+          break;
         case 'd':
           flag_display_progress = 1;
           break;
@@ -580,6 +601,109 @@  process_args (int argc, char **argv)
   return optind;
 }

+/* Get the name of the gcov file.  The return value must be free'd.
+
+   It appends the '.gcov' extension to the *basename* of the file.
+   The resulting file name will be in PWD.
+
+   e.g.,
+   input: foo.da,       output: foo.da.gcov
+   input: a/b/foo.cc,   output: foo.cc.gcov  */
+
+static char *
+get_gcov_file_intermediate_name (const char *file_name)
+{
+  const char *gcov = ".gcov";
+  char *result;
+  const char *cptr;
+
+  /* Find the 'basename'.  */
+  cptr = lbasename (file_name);
+
+  result = XNEWVEC(char, strlen (cptr) + strlen (gcov) + 1);
+  sprintf (result, "%s%s", cptr, gcov);
+
+  return result;
+}
+
+/* Output the result in intermediate format used by 'lcov'.
+
+The intermediate format contains a single file named 'foo.cc.gcov',
+with no source code included. An example output is
+
+file:foo.cc
+function:5,1,_Z3foov
+function:13,1,main
+function:19,1,_GLOBAL__sub_I__Z3foov
+function:19,1,_Z41__static_initialization_and_destruction_0ii
+lcount:5,1
+lcount:7,9
+lcount:9,8
+lcount:11,1
+file:/.../iostream
+lcount:74,1
+file:/.../basic_ios.h
+file:/.../ostream
+file:/.../ios_base.h
+function:157,0,_ZStorSt12_Ios_IostateS_
+lcount:157,0
+file:/.../char_traits.h
+function:258,0,_ZNSt11char_traitsIcE6lengthEPKc
+lcount:258,0
+...
+
+The default format outputs multiple files: 'foo.cc.gcov',
+'iostream.gcov', 'ios_base.h.gcov', etc. with source code
+included. Instead the intermediate format here outputs only a single
+file 'foo.cc.gcov' similar to the above example. */
+
+static void
+output_intermediate_file (FILE *gcov_file, source_t *src)
+{
+  unsigned line_num;    /* current line number.  */
+  const line_t *line;   /* current line info ptr.  */
+  function_t *fn;       /* current function info ptr. */
+
+  fprintf (gcov_file, "file:%s\n", src->name);    /* source file name */
+
+  for (fn = src->functions; fn; fn = fn->line_next)
+    {
+      /* function:<name>,<line_number>,<execution_count> */
+      fprintf (gcov_file, "function:%d,%s,%s\n", fn->line,
+               format_gcov (fn->blocks[0].count, 0, -1),
+               flag_demangled_names ? fn->demangled_name : fn->name);
+    }
+
+  for (line_num = 1, line = &src->lines[line_num];
+       line_num < src->num_lines;
+       line_num++, line++)
+    {
+      arc_t *arc;
+      if (line->exists)
+        fprintf (gcov_file, "lcount:%u,%s\n", line_num, format_gcov
(line->count, 0, -1));
+      if (flag_branches)
+        for (arc = line->u.branches; arc; arc = arc->line_next)
+          {
+            if (!arc->is_unconditional && !arc->is_call_non_return)
+              {
+                const char *branch_type;
+                /* branch:<line_num>,<branch_coverage_type>
+                   branch_coverage_type
+                     : notexec (Branch not executed)
+                     : taken (Branch executed and taken)
+                     : nottaken (Branch executed, but not taken)
+                */
+                if (arc->src->count)
+                  branch_type = (arc->count > 0) ? "taken" : "nottaken";
+                else
+                  branch_type = "notexec";
+                fprintf(gcov_file, "branch:%d,%s\n", line_num, branch_type);
+              }
+          }
+    }
+}
+
+
 /* Process a single input file.  */

 static void
@@ -661,6 +785,8 @@  generate_results (const char *file_name)
   unsigned ix;
   source_t *src;
   function_t *fn;
+  FILE *gcov_file_intermediate = NULL;
+  char *gcov_file_intermediate_name = NULL;

   for (ix = n_sources, src = sources; ix--; src++)
     if (src->num_lines)
@@ -671,7 +797,7 @@  generate_results (const char *file_name)
       coverage_t coverage;

       memset (&coverage, 0, sizeof (coverage));
-      coverage.name = fn->name;
+      coverage.name = flag_demangled_names ? fn->demangled_name : fn->name;
       add_line_counts (flag_function_summary ? &coverage : NULL, fn);
       if (flag_function_summary)
  {
@@ -689,7 +815,15 @@  generate_results (const char *file_name)
       else
  file_name = canonicalize_name (file_name);
     }
-
+
+  if (flag_gcov_file && flag_intermediate_format)
+    {
+      /* Open the intermediate file.  */
+      gcov_file_intermediate_name =
+        get_gcov_file_intermediate_name (file_name);
+      gcov_file_intermediate = fopen (gcov_file_intermediate_name, "w");
+    }
+
   for (ix = n_sources, src = sources; ix--; src++)
     {
       if (flag_relative_only)
@@ -712,36 +846,50 @@  generate_results (const char *file_name)
       total_executed += src->coverage.lines_executed;
       if (flag_gcov_file)
  {
-  char *gcov_file_name
-    = make_gcov_file_name (file_name, src->coverage.name);
+          if (flag_intermediate_format)
+            /* Output the intermediate format without requiring source
+               files.  This outputs a section to a *single* file.  */
+            output_intermediate_file (gcov_file_intermediate, src);
+          else
+            {
+              char *gcov_file_name
+                = make_gcov_file_name (file_name, src->coverage.name);

-  if (src->coverage.lines)
-    {
-      FILE *gcov_file = fopen (gcov_file_name, "w");
+              if (src->coverage.lines)
+                {
+                  FILE *gcov_file = fopen (gcov_file_name, "w");

-      if (gcov_file)
- {
-  fnotice (stdout, "Creating '%s'\n", gcov_file_name);
-  output_lines (gcov_file, src);
-  if (ferror (gcov_file))
-    fnotice (stderr, "Error writing output file '%s'\n",
-     gcov_file_name);
-  fclose (gcov_file);
- }
-      else
- fnotice (stderr, "Could not open output file '%s'\n",
- gcov_file_name);
-    }
-  else
-    {
-      unlink (gcov_file_name);
-      fnotice (stdout, "Removing '%s'\n", gcov_file_name);
-    }
-  free (gcov_file_name);
- }
-      fnotice (stdout, "\n");
+                  if (gcov_file)
+                    {
+                      fnotice (stdout, "Creating '%s'\n", gcov_file_name);
+                      output_lines (gcov_file, src);
+                      if (ferror (gcov_file))
+                        fnotice (stderr, "Error writing output file '%s'\n",
+                                 gcov_file_name);
+                      fclose (gcov_file);
+                    }
+                  else
+                    fnotice (stderr, "Could not open output file '%s'\n",
+                             gcov_file_name);
+                }
+              else
+                {
+                  unlink (gcov_file_name);
+                  fnotice (stdout, "Removing '%s'\n", gcov_file_name);
+                }
+              free (gcov_file_name);
+            }
+          fnotice (stdout, "\n");
+        }
     }

+  if (flag_gcov_file && flag_intermediate_format)
+    {
+      /* Now we've finished writing the intermediate file.  */
+      fclose (gcov_file_intermediate);
+      XDELETEVEC (gcov_file_intermediate_name);
+    }
+
   if (!file_name)
     executed_summary (total_lines, total_executed);
 }
@@ -766,6 +914,9 @@  release_function (function_t *fn)
     }
   free (fn->blocks);
   free (fn->counts);
+  if (flag_demangled_names && fn->demangled_name != fn->name)
+    free (fn->demangled_name);
+  free (fn->name);
 }

 /* Release all memory used.  */
@@ -1051,6 +1202,12 @@  read_graph_file (void)

   fn = XCNEW (function_t);
   fn->name = function_name;
+          if (flag_demangled_names)
+            {
+              fn->demangled_name = cplus_demangle (fn->name, DMGL_PARAMS);
+              if (!fn->demangled_name)
+                fn->demangled_name = fn->name;
+            }
   fn->ident = ident;
   fn->lineno_checksum = lineno_checksum;
   fn->cfg_checksum = cfg_checksum;
@@ -2280,7 +2437,8 @@  output_lines (FILE *gcov_file, const source_t *src
     if (arc->fake)
       return_count -= arc->count;

-  fprintf (gcov_file, "function %s", fn->name);
+  fprintf (gcov_file, "function %s", flag_demangled_names ?
+                   fn->demangled_name : fn->name);
   fprintf (gcov_file, " called %s",
    format_gcov (called_count, 0, -1));
   fprintf (gcov_file, " returned %s",
Index: doc/gcov.texi
===================================================================
--- doc/gcov.texi (revision 199269)
+++ doc/gcov.texi (working copy)
@@ -131,6 +131,8 @@  gcov [@option{-v}|@option{--version}] [@option{-h}
      [@option{-o}|@option{--object-directory} @var{directory|file}]
      [@option{-s}|@option{--source-prefix} @var{directory}]
      [@option{-d}|@option{--display-progress}]
+     [@option{-i}|@option{--intermediate-format}]
+     [@option{-m}|@option{--demangled-names}]
      @var{files}
 @c man end
 @c man begin SEEALSO
@@ -232,6 +234,50 @@  Unconditional branches are normally not interestin
 @itemx --display-progress
 Display the progress on the standard output.

+@item -i
+@itemx --intermediate-format
+Output gcov file in an easy-to-parse intermediate text format that can
+be used by @command{lcov} or other tools. The output is a single
+@file{.gcov} file per @file{.gcda} file. No source code is required.
+
+The format of the intermediate @file{.gcov} file is plain text with
+one entry per line
+
+@smallexample
+file:@var{source_file_name}
+function:@var{line_number},@var{execution_count},@var{function_name}
+lcount:@var{line number},@var{execution_count}
+branch:@var{line_number},@var{branch_coverage_type}
+
+Where the @var{branch_coverage_type} is
+   notexec (Branch not executed)
+   taken (Branch executed and taken)
+   nottaken (Branch executed, but not taken)
+
+There can be multiple @var{file} entries in an intermediate gcov
+file. All entries following a @var{file} pertain to that source file
+until the next @var{file} entry.
+@end smallexample
+
+Here is a sample when @option{-i} is used in conjuction with
@option{-b} option:
+
+@smallexample
+file:array.cc
+function:11,1,_Z3sumRKSt6vectorIPiSaIS0_EE
+function:22,1,main
+lcount:11,1
+lcount:12,1
+lcount:14,1
+branch:14,taken
+lcount:26,1
+branch:28,nottaken
+@end smallexample
+
+@item -m
+@itemx --demangled-names
+Display demangled function names in output. The default is to show
+mangled function names.
+
 @end table