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The following are examples of py_syscolors.d.

This is a simple script to trace the flow of Python functons and system
calls made, and renders the output in color ("colour") using terminal
escape sequences (which you can tweak by modifying the script).

Here it traces the example program, Code/Python/func_abc.py.

WARNING: This output is full of terminal escape sequences, so if you are
trying to view this through an editor or web browser - it may look awful.
Try viewing this using "more" (although, depending on your terminal, it
still may look awful).

# py_syscolors.d -c ./func_abc.py
C    PID  DELTA(us)              FILE:LINE TYPE     -- NAME
0 145544          2                 ":-    syscall  -> munmap
0 145544         34                 ":-    syscall  <- munmap
0 145544         56                 ":-    syscall  -> mmap
0 145544         19                 ":-    syscall  <- mmap
0 145544         42                 ":-    syscall  -> setcontext
0 145544         10                 ":-    syscall  <- setcontext
0 145544          9                 ":-    syscall  -> getrlimit
0 145544         10                 ":-    syscall  <- getrlimit
0 145544          9                 ":-    syscall  -> getpid
0 145544          8                 ":-    syscall  <- getpid
0 145544         68                 ":-    syscall  -> setcontext
0 145544          8                 ":-    syscall  <- setcontext
0 145544        121                 ":-    syscall  -> sigpending
0 145544          9                 ":-    syscall  <- sigpending
0 145544        172                 ":-    syscall  -> open64
0 145544        114                 ":-    syscall  <- open64
0 145544         14                 ":-    syscall  -> ioctl
0 145544      28209                 ":-    syscall  <- ioctl
0 145544        285                 ":-    syscall  -> close
0 145544         31                 ":-    syscall  <- close
0 145544         41                 ":-    syscall  -> open64
0 145544         88                 ":-    syscall  <- open64
0 145544          9                 ":-    syscall  -> ioctl
0 145544        293                 ":-    syscall  <- ioctl
0 145544         11                 ":-    syscall  -> close
0 145544         13                 ":-    syscall  <- close
0 145544       1182                 ":-    syscall  -> sysi86
0 145544         12                 ":-    syscall  <- sysi86
0 145544        143                 ":-    syscall  -> sysconfig
0 145544         53                 ":-    syscall  <- sysconfig
0 145544         95                 ":-    syscall  -> open64
0 145544         22                 ":-    syscall  <- open64
0 145544         11                 ":-    syscall  -> fstat64
0 145544         10                 ":-    syscall  <- fstat64
0 145544         31                 ":-    syscall  -> ioctl
0 145544         42                 ":-    syscall  <- ioctl
0 145544         24                 ":-    syscall  -> brk
0 145544         10                 ":-    syscall  <- brk
0 145544          8                 ":-    syscall  -> brk
0 145544         17                 ":-    syscall  <- brk
0 145544         30                 ":-    syscall  -> sysconfig
0 145544          8                 ":-    syscall  <- sysconfig
0 145544         32                 ":-    syscall  -> brk
0 145544          7                 ":-    syscall  <- brk
0 145544          8                 ":-    syscall  -> brk

[... 1400 lines truncated ...]

0 145544          8                 ":-    syscall    -> fstat64
0 145544          7                 ":-    syscall    <- fstat64
0 145544         11                 ":-    syscall    -> read
0 145544          8                 ":-    syscall    <- read
0 145544         29                 ":-    syscall    -> brk
0 145544          8                 ":-    syscall    <- brk
0 145544          8                 ":-    syscall    -> brk
0 145544         10                 ":-    syscall    <- brk
0 145544        393                 ":-    syscall    -> llseek
0 145544          8                 ":-    syscall    <- llseek
0 145544          9                 ":-    syscall    -> close
0 145544          9                 ":-    syscall    <- close
0 145544         14        aliases.py:17   func       -> ?
0 145544         57        aliases.py:18   func       <- ?
0 145544         20                 ":-    syscall    -> llseek
0 145544          8                 ":-    syscall    <- llseek
0 145544          8                 ":-    syscall    -> close
0 145544          8                 ":-    syscall    <- close
0 145544         15       __init__.py:43   func       -> CodecRegistryError
0 145544         12       __init__.py:45   func       <- CodecRegistryError
0 145544         26       __init__.py:145  func     <- ?
0 145544         18                 ":-    syscall  -> llseek
0 145544          8                 ":-    syscall  <- llseek
0 145544          8                 ":-    syscall  -> close
0 145544          9                 ":-    syscall  <- close
0 145544         13       __init__.py:69   func     -> search_function
0 145544         14       __init__.py:47   func       -> normalize_encoding
0 145544         18       __init__.py:67   func       <- normalize_encoding
0 145544         29                 ":-    syscall    -> stat64
0 145544         20                 ":-    syscall    <- stat64
0 145544         10                 ":-    syscall    -> open64
0 145544         18                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         17                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         18                 ":-    syscall    <- open64
0 145544          9                 ":-    syscall    -> fstat64
0 145544          8                 ":-    syscall    <- fstat64
0 145544          8                 ":-    syscall    -> open64
0 145544         18                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> fstat64
0 145544          8                 ":-    syscall    <- fstat64
0 145544          9                 ":-    syscall    -> fstat64
0 145544          7                 ":-    syscall    <- fstat64
0 145544          8                 ":-    syscall    -> ioctl
0 145544          7                 ":-    syscall    <- ioctl
0 145544          8                 ":-    syscall    -> read
0 145544         19                 ":-    syscall    <- read
0 145544          8                 ":-    syscall    -> fstat64
0 145544          8                 ":-    syscall    <- fstat64
0 145544          8                 ":-    syscall    -> read
0 145544          8                 ":-    syscall    <- read
0 145544         22                 ":-    syscall    -> llseek
0 145544          8                 ":-    syscall    <- llseek
0 145544          8                 ":-    syscall    -> close
0 145544          9                 ":-    syscall    <- close
0 145544         12          ascii.py:8    func       -> ?
0 145544         16          ascii.py:13   func         -> Codec
0 145544         12          ascii.py:18   func         <- Codec
0 145544         22          ascii.py:20   func         -> StreamWriter
0 145544         11          ascii.py:21   func         <- StreamWriter
0 145544         20          ascii.py:23   func         -> StreamReader
0 145544         11          ascii.py:24   func         <- StreamReader
0 145544         32          ascii.py:26   func         -> StreamConverter
0 145544         12          ascii.py:29   func         <- StreamConverter
0 145544         21          ascii.py:33   func       <- ?
0 145544         17                 ":-    syscall    -> llseek
0 145544          8                 ":-    syscall    <- llseek
0 145544          8                 ":-    syscall    -> close
0 145544          8                 ":-    syscall    <- close
0 145544         13          ascii.py:33   func       -> getregentry
0 145544         12          ascii.py:35   func       <- getregentry
0 145544         34       __init__.py:142  func     <- search_function
0 145544         23                 ":-    syscall  -> ioctl
0 145544         42                 ":-    syscall  <- ioctl
0 145544         11                 ":-    syscall  -> ioctl
0 145544          9                 ":-    syscall  <- ioctl
0 145544         12                 ":-    syscall  -> readlink
0 145544         16                 ":-    syscall  <- readlink
0 145544         20                 ":-    syscall  -> resolvepath
0 145544         18                 ":-    syscall  <- resolvepath
0 145544         12                 ":-    syscall  -> getcwd
0 145544         20                 ":-    syscall  <- getcwd
0 145544         27                 ":-    syscall  -> ioctl
0 145544          8                 ":-    syscall  <- ioctl
0 145544         14                 ":-    syscall  -> llseek
0 145544          7                 ":-    syscall  <- llseek
0 145544          8                 ":-    syscall  -> fstat64
0 145544          8                 ":-    syscall  <- fstat64
0 145544          8                 ":-    syscall  -> fstat64
0 145544          7                 ":-    syscall  <- fstat64
0 145544          8                 ":-    syscall  -> ioctl
0 145544          7                 ":-    syscall  <- ioctl
0 145544          8                 ":-    syscall  -> read
0 145544         19                 ":-    syscall  <- read
0 145544          9                 ":-    syscall  -> llseek
0 145544          7                 ":-    syscall  <- llseek
0 145544          8                 ":-    syscall  -> llseek
0 145544          7                 ":-    syscall  <- llseek
0 145544         12                 ":-    syscall  -> read
0 145544         13                 ":-    syscall  <- read
0 145544        105                 ":-    syscall  -> read
0 145544          9                 ":-    syscall  <- read
0 145544         10                 ":-    syscall  -> llseek
0 145544          7                 ":-    syscall  <- llseek
0 145544          8                 ":-    syscall  -> close
0 145544          9                 ":-    syscall  <- close
0 145544        117       func_abc.py:3    func     -> ?
0 145544         20                 ":-    syscall    -> stat64
0 145544         15                 ":-    syscall    <- stat64
0 145544         10                 ":-    syscall    -> stat64
0 145544         13                 ":-    syscall    <- stat64
0 145544         10                 ":-    syscall    -> open64
0 145544         15                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         13                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         13                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         13                 ":-    syscall    <- open64
0 145544          9                 ":-    syscall    -> stat64
0 145544         13                 ":-    syscall    <- stat64
0 145544          9                 ":-    syscall    -> open64
0 145544         13                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         13                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         13                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         13                 ":-    syscall    <- open64
0 145544          9                 ":-    syscall    -> stat64
0 145544         15                 ":-    syscall    <- stat64
0 145544          8                 ":-    syscall    -> open64
0 145544         15                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         15                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         15                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         15                 ":-    syscall    <- open64
0 145544          9                 ":-    syscall    -> stat64
0 145544         17                 ":-    syscall    <- stat64
0 145544          9                 ":-    syscall    -> open64
0 145544         17                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         16                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         16                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         16                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> stat64
0 145544         17                 ":-    syscall    <- stat64
0 145544          8                 ":-    syscall    -> open64
0 145544         17                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         16                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         16                 ":-    syscall    <- open64
0 145544          8                 ":-    syscall    -> open64
0 145544         16                 ":-    syscall    <- open64
0 145544          9                 ":-    syscall    -> stat64
0 145544         17                 ":-    syscall    <- stat64
0 145544          8                 ":-    syscall    -> open64
0 145544         19                 ":-    syscall    <- open64
0 145544         14                 ":-    syscall    -> fstat64
0 145544          9                 ":-    syscall    <- fstat64
0 145544         20                 ":-    syscall    -> xstat
0 145544         18                 ":-    syscall    <- xstat
0 145544          8                 ":-    syscall    -> resolvepath
0 145544         19                 ":-    syscall    <- resolvepath
0 145544         10                 ":-    syscall    -> open
0 145544         19                 ":-    syscall    <- open
0 145544         10                 ":-    syscall    -> mmap
0 145544         21                 ":-    syscall    <- mmap
0 145544         33                 ":-    syscall    -> mmap
0 145544         13                 ":-    syscall    <- mmap
0 145544          9                 ":-    syscall    -> mmap
0 145544         16                 ":-    syscall    <- mmap
0 145544          8                 ":-    syscall    -> mmap
0 145544         11                 ":-    syscall    <- mmap
0 145544         34                 ":-    syscall    -> munmap
0 145544         11                 ":-    syscall    <- munmap
0 145544         43                 ":-    syscall    -> memcntl
0 145544         13                 ":-    syscall    <- memcntl
0 145544          8                 ":-    syscall    -> close
0 145544          9                 ":-    syscall    <- close
0 145544         30                 ":-    syscall    -> mprotect
0 145544         13                 ":-    syscall    <- mprotect
0 145544        169                 ":-    syscall    -> mprotect
0 145544         13                 ":-    syscall    <- mprotect
0 145544          2                 ":-    syscall  <- nosys
0 145544        280                 ":-    syscall  -> open
0 145544         90                 ":-    syscall  <- open
0 145544        154                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        214                 ":-    syscall  -> ioctl
0 145544        301                 ":-    syscall  <- ioctl
0 145544        186                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        210                 ":-    syscall  -> close
0 145544         18                 ":-    syscall  <- close
0 145544        146                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        208                 ":-    syscall  -> open
0 145544         73                 ":-    syscall  <- open
0 145544        151                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        209                 ":-    syscall  -> ioctl
0 145544         45                 ":-    syscall  <- ioctl
0 145544        171                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        194                 ":-    syscall  -> close
0 145544         17                 ":-    syscall  <- close
0 145544        145                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        203                 ":-    syscall  -> open
0 145544         63                 ":-    syscall  <- open
0 145544        150                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        209                 ":-    syscall  -> ioctl
0 145544        280                 ":-    syscall  <- ioctl
0 145544        185                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        193                 ":-    syscall  -> close
0 145544         17                 ":-    syscall  <- close
0 145544        145                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        230                 ":-    syscall  -> open
0 145544         82                 ":-    syscall  <- open
0 145544        151                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        210                 ":-    syscall  -> ioctl
0 145544         45                 ":-    syscall  <- ioctl
0 145544        171                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        195                 ":-    syscall  -> close
0 145544         18                 ":-    syscall  <- close
0 145544        145                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        204                 ":-    syscall  -> open
0 145544         64                 ":-    syscall  <- open
0 145544        149                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        208                 ":-    syscall  -> ioctl
0 145544        283                 ":-    syscall  <- ioctl
0 145544        184                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        192                 ":-    syscall  -> close
0 145544         17                 ":-    syscall  <- close
0 145544        146                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        209                 ":-    syscall  -> open
0 145544         72                 ":-    syscall  <- open
0 145544        150                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        209                 ":-    syscall  -> ioctl
0 145544         45                 ":-    syscall  <- ioctl
0 145544        171                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        198                 ":-    syscall  -> close
0 145544         17                 ":-    syscall  <- close
0 145544        860                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        223                 ":-    syscall  -> open
0 145544         83                 ":-    syscall  <- open
0 145544        151                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        213                 ":-    syscall  -> ioctl
0 145544        281                 ":-    syscall  <- ioctl
0 145544        187                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        196                 ":-    syscall  -> close
0 145544         19                 ":-    syscall  <- close
0 145544        145                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        209                 ":-    syscall  -> open
0 145544         69                 ":-    syscall  <- open
0 145544        151                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        213                 ":-    syscall  -> ioctl
0 145544         47                 ":-    syscall  <- ioctl
0 145544        173                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        199                 ":-    syscall  -> close
0 145544         18                 ":-    syscall  <- close
0 145544        144                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        212                 ":-    syscall  -> open
0 145544         67                 ":-    syscall  <- open
0 145544        149                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        213                 ":-    syscall  -> ioctl
0 145544        282                 ":-    syscall  <- ioctl
0 145544        187                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        197                 ":-    syscall  -> close
0 145544         59                 ":-    syscall  <- close
0 145544        637                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        222                 ":-    syscall  -> open
0 145544         80                 ":-    syscall  <- open
0 145544        151                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        214                 ":-    syscall  -> ioctl
0 145544         47                 ":-    syscall  <- ioctl
0 145544        172                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        199                 ":-    syscall  -> close
0 145544         19                 ":-    syscall  <- close
0 145544        144                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        205                 ":-    syscall  -> open
0 145544         62                 ":-    syscall  <- open
0 145544        150                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        211                 ":-    syscall  -> ioctl
0 145544        304                 ":-    syscall  <- ioctl
0 145544        190                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        197                 ":-    syscall  -> close
0 145544         17                 ":-    syscall  <- close
0 145544        145                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        211                 ":-    syscall  -> open
0 145544         70                 ":-    syscall  <- open
0 145544        149                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        211                 ":-    syscall  -> ioctl
0 145544         46                 ":-    syscall  <- ioctl
0 145544        172                 ":-    syscall  -> lwp_exit
0 145544          2                 ":-    syscall  <- nosys
0 145544        260                 ":-    syscall  -> close
0 145544         26                 ":-    syscall  <- close
0 145544        160                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        207                 ":-    syscall  -> open
0 145544         79                 ":-    syscall  <- open
0 145544        151                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        216                 ":-    syscall  -> ioctl
0 145544        274                 ":-    syscall  <- ioctl
0 145544        187                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        195                 ":-    syscall  -> close
0 145544         17                 ":-    syscall  <- close
0 145544        145                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        211                 ":-    syscall  -> open
0 145544         70                 ":-    syscall  <- open
0 145544        149                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        214                 ":-    syscall  -> ioctl
0 145544         48                 ":-    syscall  <- ioctl
0 145544        173                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        201                 ":-    syscall  -> close
0 145544         17                 ":-    syscall  <- close
0 145544        145                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        211                 ":-    syscall  -> open
0 145544         65                 ":-    syscall  <- open
0 145544        150                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        213                 ":-    syscall  -> ioctl
0 145544        324                 ":-    syscall  <- ioctl
0 145544        342                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        203                 ":-    syscall  -> close
0 145544         19                 ":-    syscall  <- close
0 145544        145                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        213                 ":-    syscall  -> open
0 145544         76                 ":-    syscall  <- open
0 145544        150                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        214                 ":-    syscall  -> ioctl
0 145544         48                 ":-    syscall  <- ioctl
0 145544        174                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        198                 ":-    syscall  -> close
0 145544         18                 ":-    syscall  <- close
0 145544        146                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        206                 ":-    syscall  -> open
0 145544         63                 ":-    syscall  <- open
0 145544        150                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        213                 ":-    syscall  -> ioctl
0 145544        272                 ":-    syscall  <- ioctl
0 145544        185                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        194                 ":-    syscall  -> close
0 145544         17                 ":-    syscall  <- close
0 145544        146                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        213                 ":-    syscall  -> open
0 145544         70                 ":-    syscall  <- open
0 145544        151                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        214                 ":-    syscall  -> ioctl
0 145544         47                 ":-    syscall  <- ioctl
0 145544        173                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        236                 ":-    syscall  -> close
0 145544         23                 ":-    syscall  <- close
0 145544        156                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        210                 ":-    syscall  -> open
0 145544         76                 ":-    syscall  <- open
0 145544        150                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        214                 ":-    syscall  -> ioctl
0 145544        276                 ":-    syscall  <- ioctl
0 145544        187                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        197                 ":-    syscall  -> close
0 145544         17                 ":-    syscall  <- close
0 145544        145                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        211                 ":-    syscall  -> open
0 145544         71                 ":-    syscall  <- open
0 145544        149                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        214                 ":-    syscall  -> ioctl
0 145544         47                 ":-    syscall  <- ioctl
0 145544        172                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        199                 ":-    syscall  -> close
0 145544         19                 ":-    syscall  <- close
0 145544        144                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        210                 ":-    syscall  -> open
0 145544         64                 ":-    syscall  <- open
0 145544        150                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        212                 ":-    syscall  -> ioctl
0 145544        297                 ":-    syscall  <- ioctl
0 145544        522                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        210                 ":-    syscall  -> close
0 145544         21                 ":-    syscall  <- close
0 145544        146                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        213                 ":-    syscall  -> open
0 145544         79                 ":-    syscall  <- open
0 145544        151                 ":-    syscall  -> lwp_exit
0 145544          0                 ":-    syscall  <- nosys
0 145544        213                 ":-    syscall  -> ioctl
0 145544         47                 ":-    syscall  <- ioctl
0 145544        173                 ":-    syscall  -> lwp_exit
0 145544          1                 ":-    syscall  <- nosys
0 145544        201                 ":-    syscall  -> close
0 145544         19                 ":-    syscall  <- close
0 145544        144                 ":-    syscall  -> lwp_exit
0 145544      91667                 ":-    syscall    -> munmap
0 145544         34                 ":-    syscall    <- munmap
0 145544         65                 ":-    syscall    -> gtime
0 145544          9                 ":-    syscall    <- gtime
0 145544         13                 ":-    syscall    -> open
0 145544         42                 ":-    syscall    <- open
0 145544         10                 ":-    syscall    -> fstat64
0 145544          9                 ":-    syscall    <- fstat64
0 145544          8                 ":-    syscall    -> read
0 145544         31                 ":-    syscall    <- read
0 145544          9                 ":-    syscall    -> close
0 145544         11                 ":-    syscall    <- close
0 145544         65                 ":-    syscall    -> llseek
0 145544          9                 ":-    syscall    <- llseek
0 145544          8                 ":-    syscall    -> close
0 145544          9                 ":-    syscall    <- close
0 145544         25       func_abc.py:14   func       -> func_a
0 145544         24                 ":-    syscall      -> ioctl
0 145544          9                 ":-    syscall      <- ioctl
0 145544          8                 ":-    syscall      -> fstat64
0 145544          8                 ":-    syscall      <- fstat64
0 145544          9                 ":-    syscall      -> fstat64
0 145544          7                 ":-    syscall      <- fstat64
0 145544         40                 ":-    syscall      -> pollsys
0 145544    1009424                 ":-    syscall      <- pollsys
0 145544         35       func_abc.py:9    func         -> func_b
0 145544         40                 ":-    syscall        -> pollsys
0 145544    1009681                 ":-    syscall        <- pollsys
0 145544         36       func_abc.py:5    func           -> func_c
0 145544         41                 ":-    syscall          -> pollsys
Function A
Function B
Function C
0 145544    1000116                 ":-    syscall          <- pollsys
0 145544         34       func_abc.py:7    func           <- func_c
0 145544         28       func_abc.py:12   func         <- func_b
0 145544         14       func_abc.py:17   func       <- func_a
0 145544         14       func_abc.py:19   func     <- ?
0 145544         26                 ":-    syscall  -> sigaction
0 145544         15                 ":-    syscall  <- sigaction
0 145544       1150                 ":-    syscall  -> write
0 145544         21                 ":-    syscall  <- write
0 145544        212                 ":-    syscall  -> open64
0 145544        116                 ":-    syscall  <- open64
0 145544         11                 ":-    syscall  -> ioctl
0 145544         24                 ":-    syscall  <- ioctl
0 145544         10                 ":-    syscall  -> close
0 145544         16                 ":-    syscall  <- close
0 145544          8                 ":-    syscall  -> open64
0 145544         32                 ":-    syscall  <- open64
0 145544          9                 ":-    syscall  -> ioctl
0 145544        169                 ":-    syscall  <- ioctl
0 145544         10                 ":-    syscall  -> close
0 145544         12                 ":-    syscall  <- close
0 145544         62                 ":-    syscall  -> rexit

Here you can see the output showing the path the script follows as it is
executed.

0 145544         35       func_abc.py:9    func         -> func_b
0 145544         40                 ":-    syscall        -> pollsys
0 145544    1009681                 ":-    syscall        <- pollsys
0 145544         36       func_abc.py:5    func           -> func_c

This excerpt shows line 9 of the script executing. It makes a pollsys syscall
in order to fulfill the request to sleep for one second, returns and then goes
to line 5.  Checking the logic flow of the example program, this makes sense.