ggcov-webdb - Online in the Cloud

PROGRAM:

NAME

ggcov-webdb - generate intermediate database for ggcov web interface

SYNOPSIS

ggcov-webdb [[-r] directory|file] ...

DESCRIPTION

Ggcov-webdb generates an intermediate database and tree of source files from a development
directory, in the form of a tarball. The files in this tarball are later used by the
ggcov PHP pages to present test coverage data to WWW browsers.

Test coverage data is produced by C and C++ programs compiled with gcc -fprofile-arcs
-ftest-coverage. So the combination of ggcov-webdb and the ggcov PHP pages is basically a
WWW replacement for the gcov program that comes with gcc.

The intermediate database approach is used to handle the common case where the development
machine and the web server machine are separate. The database contains coverage data in
an indexed, platform-independent, PHP-friendly form. Because the database format is
platform-independant the PHP pages can be deployed on web servers of a different
architecture to the development machines. In fact the ggcov web pages support any web
server that meets the following criteria:

· supports PHP version 4.3 or later, and

· provides the dba extension with the db4 provider (which ggcov uses to read the
intermediate database), and

· provides the gd extension (which ggcov uses to generate the bargraphs on the
Summary page).

The sourceforge.net project web server is an example of such a server.

Ggcov-webdb produces a gzipped tarball containing the intermediate database itself and
copies of all the source files which are mentioned in the database. This is all the
information that the ggcov web pages need, in one bundle which is convenient to copy from
the development machine to the web server. Usually this tarball would be extracted into a
subdirectory of /var/ggcov/tests/ on the web server.

Arguments are used to specify how to find coverage data files. The arguments can
combinations of:

directory
The directory is scanned for source files, which are handled as if they had been
specified on the commandline (except that missing coverage data files are silently
ignored). If the -r flag is in effect, sub-directories are scanned recursively.
Multiple directories can be specified and are scanned in the order given.

executable
The executable file is scanned for debugging records which contain source file
names, and each source file which exists is handled as if it had been specified on
the command line (except that missing coverage data files are silently ignored).
Any shared libraries on which the executable depends are also scanned. Multiple
executables can be specified and are scanned in the order given. This feature is
only available on some platforms (for example, i386-linux).

source-file
Is any regular file ending in one of the file extensions .c, .cc, .cxx, .cpp, or
.C. Source files are matched to their corresponding coverage data files (.gcno and
.gcda files, or .bb, .bbg, and .da files with older compilers) and object files by
searching for a file of the same basename and the appropriate extension first in
the same directory as the source file and then in all the directories specified on
the command line (in the order they were specified).

OPTIONS

-f test.tgz, --output-file=test.tgz
Generate output to filename test.tgz instead of the default ggcov.webdb.tgz. The
special filename - can be used to generate output to stdout.

-o dir, --object-directory=dir
Add the directory dir to the search path for object files and coverage data files.

-r, --recursive
When a directory is specified on the command line, search for coverage data files
recursively in all child directories.

-X symbols, --suppress-ifdef=symbols
Do not include in statistics or summaries, code inside C pre-processor directives
which depend on any of the given symbols. One or more symbols may be given,
separated by commas or whitespace. Ggcov-webdb understands the following subset of
the C pre-processor command set:

· #if SYMBOL
· #if defined(SYMBOL)
· #ifdef SYMBOL
· #ifndef SYMBOL
· #else
· #endif

For example, -X DEBUG will suppress the fprintf() call in this code:

unsigned int
my_function(unsigned int x)
{
x += 42;
#ifdef DEBUG
fprintf(stderr, "my_function: x=%u\n", x);
#endif
return x;
}

This option is useful for suppressing test infrastructure code, debugging code, or
other code which is compiled into the coverage test executable but whose coverage
is not significant.

-Y words, --suppress-comment=words
Do not include in statistics or summaries, code on lines which also contains a
single-line comment comprising only one of the given words. One or more symbols
may be given, separated by commas or whitespace. For example, specifying -Y
IGNOREME will suppress the assert() in this code:

unsigned int
my_function(unsigned int x)
{
x += 42;
assert(x >= 42); /* IGNOREME */
return x;
}

This option is useful for suppressing test infrastructure code, debugging code, or
other code which is compiled into the coverage test executable but whose coverage
is not significant.

-Z startword,endword,...

--suppress-comment-between=startword,endword,...
Do not include in statistics or summaries, code on lines between those containing a
single-line comment comprising only startword and the next single-line comment
comprising only endword. Two or more symbols may be given, in pairs, separated by
commas or whitespace. For example, -Z STARTIGNORE,ENDIGNORE will suppress the
entire function in this code:

/* STARTIGNORE */
unsigned int
my_function(unsigned int x)
{
x += 42;
return x;
}
// ENDIGNORE

This option is useful for suppressing test infrastructure code, debugging code, or
other code which is compiled into the coverage test executable but whose coverage
is not significant.

EXAMPLES

Generate intermediate database for all the available source in the executable a.out (on
some platforms only), and install as test foo in the default tests location.

mkdir /var/ggcov/tests/foo
ggcov-webdb -f - a.out |
(cd /var/ggcov/tests/foo ; tar -xzf - )

Generate intermediate database for all the C source in the current directory.

ggcov-webdb *.c

Generate intermediate database for all the C source in one directory where the object
files and test coverage data files are in different directories:

ggcov-webdb /foo/obj/ /foo/cov-data/ /foo/src/

Use ggcov-webdb online using onworks.net services