c语言 - 如何在 GNU cflow 中显示"only"定义的函数？

Question

我有一个C文件，如下所示：

// SPDX-License-Identifier: GPL-2.0
#include <linux/ieee80211.h>
#include <linux/export.h>
#include <net/cfg80211.h>
#include "nl80211.h"
#include "core.h"
#include "rdev-ops.h"
int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool notify)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err;
ASSERT_WDEV_LOCK(wdev);
if (!rdev->ops->stop_ap)
return -EOPNOTSUPP;
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
return -EOPNOTSUPP;
if (!wdev->beacon_interval)
return -ENOENT;
err = rdev_stop_ap(rdev, dev);
if (!err) {
wdev->conn_owner_nlportid = 0;
wdev->beacon_interval = 0;
memset(&wdev->chandef, 0, sizeof(wdev->chandef));
wdev->ssid_len = 0;
rdev_set_qos_map(rdev, dev, NULL);
if (notify)
nl80211_send_ap_stopped(wdev);
/* Should we apply the grace period during beaconing interface
* shutdown also?
*/
cfg80211_sched_dfs_chan_update(rdev);
}
schedule_work(&cfg80211_disconnect_work);
return err;
}
int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool notify)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err;
wdev_lock(wdev);
err = __cfg80211_stop_ap(rdev, dev, notify);
wdev_unlock(wdev);
return err;
}

执行命令cflow:cflow ap.c -i_ -d2 --omit-arguments --omit-symbol-name后，我得到输出：

__cfg80211_stop_ap() <int () at ap.c:9>:
ASSERT_WDEV_LOCK()
rdev_stop_ap()
memset()
rdev_set_qos_map()
nl80211_send_ap_stopped()
cfg80211_sched_dfs_chan_update()
schedule_work()
cfg80211_stop_ap() <int () at ap.c:48>:
wdev_lock()
__cfg80211_stop_ap() <int () at ap.c:9>:
wdev_unlock()

我想要的是不应该显示文件中找不到的函数。我想要我的输出像：

__cfg80211_stop_ap() <int () at ap.c:9>:
cfg80211_stop_ap() <int () at ap.c:48>:
__cfg80211_stop_ap() <int () at ap.c:9>:

Answer 1

您可以通过管道将其发送到如下的perl过滤器：

cflow ap.c | perl -e 'while(<>){if(/at ap.c/){print;}}'

Answer 2

基于Valter的回答，这里有一个使用sed进行过滤的版本：

cflow --brief --omit-arguments --omit-symbol-names --no-main stream_buffer.c 2>/dev/null | sed -n '/stream_buffer.c/p'

2>/dev/null部分用于抑制缺少定义的错误(在其他文件中定义某些函数时会出现这种情况(。

您可以将其封装在一个方便的脚本中，这样您就不必重复键入文件名：

cat cflowfile.sh                          
cflow --brief --omit-arguments --omit-symbol-names --no-main $1 2>/dev/null | sed -n '/'$1'/p' | sed -n 's/ <.*//p'

以下是在FreeRTOS的stream_buffer.c:上运行它的示例

./cflowfile.sh stream_buffer.c
ucStreamBufferGetStreamBufferType()
uxStreamBufferGetStreamBufferNumber()
vStreamBufferDelete()
vStreamBufferSetStreamBufferNumber()
xStreamBufferBytesAvailable()
prvBytesInBuffer()
xStreamBufferGenericCreateStatic()
prvInitialiseNewStreamBuffer()
xStreamBufferIsEmpty()
xStreamBufferIsFull()
xStreamBufferSpacesAvailable()
xStreamBufferNextMessageLengthBytes()
prvBytesInBuffer()
prvReadBytesFromBuffer()
xStreamBufferReceive()
prvBytesInBuffer()
prvReadMessageFromBuffer()
prvReadBytesFromBuffer()
xStreamBufferReceiveCompletedFromISR()
xStreamBufferReceiveFromISR()
prvBytesInBuffer()
prvReadMessageFromBuffer()
xStreamBufferReset()
prvInitialiseNewStreamBuffer()
xStreamBufferSend()
xStreamBufferSpacesAvailable()
prvWriteMessageToBuffer()
prvWriteBytesToBuffer()
prvBytesInBuffer()
xStreamBufferSendCompletedFromISR()
xStreamBufferSendFromISR()
xStreamBufferSpacesAvailable()
prvWriteMessageToBuffer()
prvBytesInBuffer()
xStreamBufferSetTriggerLevel()

不幸的是，我还没有找到一个很好的方法来使用cflow的--reverse选项。这可能需要一个自定义的后处理脚本来反转上面的输出，而不是简单地在cflow中使用--reverse标志。理想情况下，我们能够生成如下输出：

./todo-cflowfile-reverse.sh stream_buffer.c
prvBytesInBuffer()
xStreamBufferBytesAvailable()
xStreamBufferNextMessageLengthBytes()
xStreamBufferReceive()
xStreamBufferReceiveFromISR()
xStreamBufferSend()
xStreamBufferSendFromISR()
prvReadBytesFromBuffer()
prvReadMessageFromBuffer()
xStreamBufferReceive()
xStreamBufferReceiveFromISR()
xStreamBufferNextMessageLengthBytes()
prvInitialiseNewStreamBuffer()
xStreamBufferGenericCreateStatic()
xStreamBufferReset()
prvWriteBytesToBuffer()
prvWriteMessageToBuffer()
xStreamBufferSend()
xStreamBufferSendFromISR()
xStreamBufferSpacesAvailable()
xStreamBufferIsFull()
xStreamBufferSend()
xStreamBufferSendFromISR()