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| -rw-r--r-- | CHANGELOG.md | 2 | ||||
| -rw-r--r-- | src/sys/ptrace.rs | 34 |
2 files changed, 36 insertions, 0 deletions
diff --git a/CHANGELOG.md b/CHANGELOG.md index 2571a71e..e434e5c4 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -24,6 +24,8 @@ This project adheres to [Semantic Versioning](http://semver.org/). ## [0.10.0] 2018-01-26 ### Added +- Added specialized wrapper: `sys::ptrace::step` + ([#852](https://github.com/nix-rust/nix/pull/852)) - Added `AioCb::from_ptr` and `AioCb::from_mut_ptr` ([#820](https://github.com/nix-rust/nix/pull/820)) - Added specialized wrappers: `sys::ptrace::{traceme, syscall, cont, attach}`. Using the matching routines diff --git a/src/sys/ptrace.rs b/src/sys/ptrace.rs index 90c12e43..4fb4f5b5 100644 --- a/src/sys/ptrace.rs +++ b/src/sys/ptrace.rs @@ -280,3 +280,37 @@ pub fn cont<T: Into<Option<Signal>>>(pid: Pid, sig: T) -> Result<()> { } } +/// Move the stopped tracee process forward by a single step as with +/// `ptrace(PTRACE_SINGLESTEP, ...)` +/// +/// Advances the execution of the process with PID `pid` by a single step optionally delivering a +/// signal specified by `sig`. +/// +/// # Example +/// ```rust +/// extern crate nix; +/// use nix::sys::ptrace::step; +/// use nix::unistd::Pid; +/// use nix::sys::signal::Signal; +/// use nix::sys::wait::*; +/// fn main() { +/// // If a process changes state to the stopped state because of a SIGUSR1 +/// // signal, this will step the process forward and forward the user +/// // signal to the stopped process +/// match waitpid(Pid::from_raw(-1), None) { +/// Ok(WaitStatus::Stopped(pid, Signal::SIGUSR1)) => { +/// let _ = step(pid, Signal::SIGUSR1); +/// } +/// _ => {}, +/// } +/// } +/// ``` +pub fn step<T: Into<Option<Signal>>>(pid: Pid, sig: T) -> Result<()> { + let data = match sig.into() { + Some(s) => s as i32 as *mut c_void, + None => ptr::null_mut(), + }; + unsafe { + ptrace_other(Request::PTRACE_SINGLESTEP, pid, ptr::null_mut(), data).map(|_| ()) + } +} |