静态分析C语言生成函数调用关系的利器——cflow（二）

uname -a

sudo apt-get install cflow
sudo apt-get install graphviz

/*
 * Copyright (c) 2002-2007 Niels Provos <provos@citi.umich.edu>
 * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
 *
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */
#include "event2/event-config.h"
#include "util-internal.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifndef _WIN32
#include <unistd.h>
#include <sys/time.h>
#endif
#include <errno.h>

#include "event2/event.h"
#include "event2/event_compat.h"
#include "event2/event_struct.h"

int called = 0;

#define NEVENT	20000

struct event *ev[NEVENT];

struct evutil_weakrand_state weakrand_state;

static int
rand_int(int n)
{
	return evutil_weakrand_(&weakrand_state) % n;
}

static void
time_cb(evutil_socket_t fd, short event, void *arg)
{
	struct timeval tv;
	int i, j;

	called++;

	if (called < 10*NEVENT) {
		for (i = 0; i < 10; i++) {
			j = rand_int(NEVENT);
			tv.tv_sec = 0;
			tv.tv_usec = rand_int(50000);
			if (tv.tv_usec % 2 || called < NEVENT)
				evtimer_add(ev[j], &tv);
			else
				evtimer_del(ev[j]);
		}
	}
}

int
main(int argc, char **argv)
{
	struct event_base *base;
	struct timeval tv;
	int i;

#ifdef _WIN32
	WORD wVersionRequested;
	WSADATA wsaData;

	wVersionRequested = MAKEWORD(2, 2);

	(void) WSAStartup(wVersionRequested, &wsaData);
#endif

	evutil_weakrand_seed_(&weakrand_state, 0);

	if (getenv("EVENT_DEBUG_LOGGING_ALL")) {
		event_enable_debug_logging(EVENT_DBG_ALL);
	}

	base = event_base_new();

	for (i = 0; i < NEVENT; i++) {
		ev[i] = evtimer_new(base, time_cb, event_self_cbarg());
		tv.tv_sec = 0;
		tv.tv_usec = rand_int(50000);
		evtimer_add(ev[i], &tv);
	}

	i = event_base_dispatch(base);

	printf("event_base_dispatch=%d, called=%d, EVENT=%d\n",
		i, called, NEVENT);

	if (i == 1 && called >= NEVENT) {
		return EXIT_SUCCESS;
	} else {
		return EXIT_FAILURE;
	}
}

cflow ./test/test-time.c --format=dot > test_time.dot
dot -T gif test_time.dot -o test_time.gif  

cflow  ./test/test-time.c ./*.c --format=dot > test_time.dot

cflow ./test/test-time.c ./*.c \
 -i^s --brief \
 --define '__attribute__\(c\)'\
 --define '__typeof\(c\)=int' \
 --symbol __inline:=inline\
 --symbol __inline__:=inline\
 --symbol __const__:=const\
 --symbol __const:=const\
 --symbol __restrict:=restrict\
 --symbol __extension__:qualifier\
 --symbol __asm__:wrapper\
 --symbol __nonnull:wrapper\
 --symbol __wur:wrapper \
 --format=dot > test_time.dot

mkdir build && cd build
cmake ..     # Default to Unix Makefiles.
make

find -name "event-config.h" 

cflow ./test/test-time.c ./*.c \
 -i^s --brief \
 --define '__attribute__\(c\)'\
 --define '__typeof\(c\)=int' \
 --symbol __inline:=inline\
 --symbol __inline__:=inline\
 --symbol __const__:=const\
 --symbol __const:=const\
 --symbol __restrict:=restrict\
 --symbol __extension__:qualifier\
 --symbol __asm__:wrapper\
 --symbol __nonnull:wrapper\
 --symbol __wur:wrapper \
 --include-dir=./build/include/ \
 --format=dot > test_time.dot

cflow ./test/test-time.c ./*.c \
 -i^s --brief \
 --define '__attribute__\(c\)'\
 --define '__typeof\(c\)=int' \
 --symbol __inline:=inline\
 --symbol __inline__:=inline\
 --symbol __const__:=const\
 --symbol __const:=const\
 --symbol __restrict:=restrict\
 --symbol __extension__:qualifier\
 --symbol __asm__:wrapper\
 --symbol __nonnull:wrapper\
 --symbol __wur:wrapper \
 --include-dir=./build/include/ \
 --include-dir=./include \
 --include-dir=./ \
 --format=dot > test_time.dot

/* blk0() and blk() perform the initial expand. */
/* I got the idea of expanding during the round function from SSLeay */
#if defined(LITTLE_ENDIAN)
#define blk0(i)                                                                \
    (block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) |                       \
                   (rol(block->l[i], 8) & 0x00FF00FF))
#elif defined(BIG_ENDIAN)
#define blk0(i) block->l[i]
#else
#error "Endianness not defined!"
#endif

echo -n I | od -to2 | head -n1 | cut -f2 -d" " | cut -c6 

cflow ./test/test-time.c ./*.c \
 -i^s --brief \
 --define '__attribute__\(c\)'\
 --define '__typeof\(c\)=int' \
 --symbol __inline:=inline\
 --symbol __inline__:=inline\
 --symbol __const__:=const\
 --symbol __const:=const\
 --symbol __restrict:=restrict\
 --symbol __extension__:qualifier\
 --symbol __asm__:wrapper\
 --symbol __nonnull:wrapper\
 --symbol __wur:wrapper \
 --include-dir=./build/include/ \
 --include-dir=./include \
 --include-dir=./ \
 -D LITTLE_ENDIAN \
 --format=dot > test_time.dot

dot -T gif test_time.dot -o test_time.gif  

dot -T svg test_time.dot -o test_time.svg