83 lines
1.6 KiB
Rust
83 lines
1.6 KiB
Rust
// NB: Don't rely on other core mods here as this has to move into the rt
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import unsafe::reinterpret_cast;
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import ptr::offset;
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import sys::size_of;
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type Word = uint;
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class Frame {
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let fp: *Word;
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new(fp: *Word) {
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self.fp = fp;
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}
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}
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fn walk_stack(visit: fn(Frame) -> bool) {
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debug!{"beginning stack walk"};
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do frame_address |frame_pointer| {
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let mut frame_address: *Word = unsafe {
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reinterpret_cast(frame_pointer)
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};
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loop {
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let fr = Frame(frame_address);
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debug!{"frame: %x", unsafe { reinterpret_cast(fr.fp) }};
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visit(fr);
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unsafe {
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let next_fp: **Word = reinterpret_cast(frame_address);
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frame_address = *next_fp;
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if *frame_address == 0u {
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debug!{"encountered task_start_wrapper. ending walk"};
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// This is the task_start_wrapper_frame. There is
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// no stack beneath it and it is a foreign frame.
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break;
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}
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}
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}
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}
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}
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#[test]
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fn test_simple() {
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for walk_stack |_frame| {
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}
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}
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#[test]
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fn test_simple_deep() {
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fn run(i: int) {
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if i == 0 { return }
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for walk_stack |_frame| {
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unsafe {
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breakpoint();
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}
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}
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run(i - 1);
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}
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run(10);
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}
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fn breakpoint() {
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rustrt::rust_dbg_breakpoint()
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}
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fn frame_address(f: fn(*u8)) {
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rusti::frame_address(f)
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}
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extern mod rustrt {
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fn rust_dbg_breakpoint();
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}
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#[abi = "rust-intrinsic"]
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extern mod rusti {
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fn frame_address(f: fn(*u8));
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}
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