Although I checked the manuals several time, I haven't found the origin of the name strace but it is likely system-call trace, since this is obvious. There are three bigger notes to say about strace. Note 1: Both these functions strace and ltrace are using the system call ptrace. So ptrace system call is effectively how strace works.

2011年3月31日 · strace works by using the ptrace system call which causes the kernel to halt the program being traced each time it enters or exits the kernel via a system call. The tracing program (in this case strace) can then inspect the state of the program by using ptrace. strace gets the arguments to each system call depending on how that system works. On ...

It can be installed on Debian/Ubuntu (and many other systems) with pip3 install strace-process-tree. The process below to capture data is the same for both (but use strace-process-tree instead to create the graph). Thanks Jan Tojnar. It seems the perl script may suffer from bit rot. For a cross platform solution with older busybox type ps, it ...

2013年2月4日 · strace -fp PID just does the right thing on my system (Ubuntu 20.04.1 LTS). The strace manual page points this out:-f Trace child processes as they are created by currently traced processes as a result of the fork(2), vfork(2) and clone(2) system calls.

2024年5月13日 · strace -p <PID>----> To attach a process to strace. "-p" option is for PID of the process. strace -e trace=read,write -p <PID>--> By this you can also trace a process/program for an event, like read and write (in this example). So here it will print all such events that include read and write system calls by the process.

2012年3月8日 · strace now has new options to track file descriptors:--decode-fds=set Decode various information associated with file descriptors. The default is decode-fds=none. set can include the following elements: path Print file paths.

The strace command is normally used as in strace commandname command args and it launches commandname-- easy, but in this Android use case, not helpful. However, strace has a -p option which is helpful to you: strace -p <process id> will let …

2020年8月9日 · The strace -e write=a,b flag shows write syscalls for file descriptors numbered from a to b, and -e write=all shows write syscalls to all file descriptors. What you're looking for is -e abbrev=none ; see the manpage:

2018年3月8日 · Strace can be used for tracing process by passing command for the process as below. strace -f -tt -o strace.log -D <SOME_COMMAND> But below command fails to trace the syscalls of started daemon process. strace -f -tt -o strace.log -D service nginx start. In this case the strace just traces syscall for /usr/sbin/service and terminates.

2011年7月13日 · Some of the arguments in these commands are quite long, and strace is abbreviating the arguments to execve (I see "..." after about 30 characters), preventing me from getting any useful information. after about 30 characters), preventing me …