Advanced python tracing

strace python -m trace --trace myprog.py | grep -v 'write(1,'

Trace python statement execution and syscalls invoked during that simultaneously

Sample Output

echo 'print("Hello world!")' > helloworld.py; strace python -m trace --trace helloworld.py | grep -v 'write(1,'
execve("/usr/bin/python", ["python", "-m", "trace", "--trace", "helloworld.py"], [/* 22 vars */]) = 0
brk(0)                                  = 0x222e000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f364a418000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=81069, ...}) = 0
mmap(NULL, 81069, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f364a404000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
..snip...
write(1, " --- modulename: helloworld, fun"..., 188 --- modulename: helloworld, funcname: <module>
helloworld.py(1): print("Hello world!")
Hello world!
 --- modulename: trace, funcname: _unsettrace
trace.py(80):         sys.settrace(None)
) = 188
exit_group(0)                           = ?
+++ exited with 0 +++

By: roolebo

2016-05-27 21:01:01

grep python strace Linux debug python

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