diff options
Diffstat (limited to 'internal/eventloop.go')
| -rw-r--r-- | internal/eventloop.go | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/internal/eventloop.go b/internal/eventloop.go index f7bfa9a..18f02c4 100644 --- a/internal/eventloop.go +++ b/internal/eventloop.go @@ -266,13 +266,15 @@ func (e *eventLoop) syscallExit(exitEv event.Event, ch chan<- *event.Pair) { if !ok { panic("expected a file.FdFile") } + if fdFile.Flags == -1 { + fmt.Println("DEBUG flags is -1", fdFile) + } // See fcntl(2) for implementation details switch v.Cmd { case syscall.F_SETFL: - fmt.Println("DEBUG", fdFile) canChange := syscall.O_APPEND | syscall.O_ASYNC | syscall.O_DIRECT | syscall.O_NOATIME | syscall.O_NONBLOCK - *fdFile.Flags |= (int32(v.Arg) & int32(canChange)) + fdFile.Flags |= (int32(v.Arg) & int32(canChange)) ev.File = fdFile e.files[fd] = fdFile case syscall.F_DUPFD: @@ -281,7 +283,7 @@ func (e *eventLoop) syscallExit(exitEv event.Event, ch chan<- *event.Pair) { case syscall.F_DUPFD_CLOEXEC: newFd := int32(retEvent.Ret) duppedFd := fdFile.Dup(newFd) - *duppedFd.Flags |= syscall.O_CLOEXEC + duppedFd.Flags |= syscall.O_CLOEXEC e.files[newFd] = duppedFd } @@ -292,7 +294,6 @@ func (e *eventLoop) syscallExit(exitEv event.Event, ch chan<- *event.Pair) { // TODO: implement dup syscall // TODO: implement dup2 syscall // TODO: implement dup3 syscall - // TODO: Yes, on Linux, when you use the `fork` syscall to create a subprocess, the child process shares the same file descriptors as the parent process. If the child process changes the file modes of these open file descriptors (e.g., by using `fcntl` or similar system calls), those changes will be reflected in the parent process as well, since they reference the same underlying file table entries. ev.PrevPair, _ = e.prevPairs[ev.EnterEv.GetTid()] ev.CalculateDurations() |