strace ./example 2>&1 | grep -E"open|read|write|close" 这种方法可以迅速聚焦到与问题相关的系统调用,省去浏览大量无关信息的麻烦。 在调试程序时,时间戳信息有助于分析程序的性能瓶颈。strace支持通过-tt选项在输出中添加时间戳,这样可以看到每个系统调用的精确时间: strace -tt ./example 结合时间戳信息,...
上面只输出指定ls命令的系统调用,在strace输出的最后面同时也输出了ls命令的结果 If you want to trace multiple system calls use the “-e trace=” option. The following example displays both open and read system calls. 如果想trace多个系统调用,可以使用"-e strace="选项,下面展示了open和read命令的系统...
The BUFFER parameter applies only to conventional path Export. It has no effect on a direct path Export. For direct path Exports, use the RECORDLENGTH parameter to specify the size of the buffer that Export uses for writing to the export file. Example: Calculating Buffer Size This section show...
The BUFFER parameter applies only to conventional path Export. It has no effect on a direct path Export. For direct path Exports, use the RECORDLENGTH parameter to specify the size of the buffer that Export uses for writing to the export file. Example: Calculating Buffer Size This section show...
file descriptors listed in the specified set. For example, to see all input activity on file descriptors 3 and 5 use -e read=3,5. Note that this is independent from the normal tracing of the read(2) system call which is controlled by the option -e trace=read. ...
file descriptors listed in the specified set. For example, to see all input activity on file descriptors 3 and 5 use -e read=3,5. Note that this is independent from the normal tracing of the read(2) system call which is controlled by the option -e trace=read. ...
Example 1 A sample output of the strace command: The following example outputs all trace messages from the module or driver whose module ID is 41: strace 41 all all The following example outputs those trace messages from driver or module ID 41 with sub-IDs 0, 1, or 2: strace 41 0 ...
For example, trace=open,close,read,write means to only trace those four system calls. Be careful when making inferences about the user/kernel boundary if only a subset of system calls are being monitored. The default is trace=all. -e trace=file Trace all system calls which take a file ...
假设我们有一个简单的C语言程序example.c,我们想要使用strace来跟踪它的执行: 代码语言:txt 复制 #include <stdio.h> #include <stdlib.h> int main() { FILE *file = fopen("test.txt", "w"); if (file == NULL) { perror("Failed to open file"); return 1; } fprintf(file, "Hello, World...
Structure pointers are dereferenced and the members are displayed as appropriate. In all cases arguments are formattedinthemostC-like fashion possible. For example, the essence of thecommand‘‘ls-l/dev/null’’ is captured as: lstat("/dev/null",{st_mode=S_IFCHR|0666,st_rdev=makedev(1,...