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如何像cp file1 file2使用 ftrace 工具一样跟踪命令?

我想查看我使用时调用的所有函数,cp file1 file2但我不知道该怎么做。任何人都可以帮助我并在终端中写下执行此操作的确切命令吗?

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使用以下脚本,您可以使用它来跟踪您想要的任何命令。取自这里,我稍作修改,您可以在 /tmp/mytrace.txt 获得跟踪输出。示例用法:script.sh cp file1 file2

#!/bin/bash     
DPATH="/sys/kernel/debug/tracing"
PID=$$
TEMP="/tmp/mytrace.txt"
## Quick basic checks
[ `id -u` -ne 0  ]  &&  { echo "needs to be root" ; exit 1; }  # check for root permissions
[ -z $1 ] && { echo "needs process name as argument" ; exit 1; } # check for args to this function
mount | grep -i debugfs &> /dev/null
[ $? -ne 0 ] && { echo "debugfs not mounted, mount it first"; exit 1; } #checks for debugfs mount

# flush existing trace data
echo nop > $DPATH/current_tracer

# set function tracer
echo function_graph > $DPATH/current_tracer

# enable the current tracer
#echo 1 > $DPATH/tracing_on

# write current process id to set_ftrace_pid file
echo $PID > $DPATH/set_ftrace_pid

# start the tracing
echo 1 > $DPATH/tracing_on
# execute the process
exec $* > /dev/null 2>&1 &
#echo "$*"

`cat $DPATH/trace > $TEMP`

echo 0 > $DPATH/tracing_on

echo nop > $DPATH/current_tracer
于 2013-09-09T09:51:07.830 回答