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40 lines
1.4 KiB
Rust
40 lines
1.4 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use crate::sampler::{NativeStack, Sampler};
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type MonitoredThreadId = usize; // TODO: use winapi
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#[allow(dead_code)]
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pub struct WindowsSampler {
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thread_id: MonitoredThreadId,
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}
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impl WindowsSampler {
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#[allow(unsafe_code, dead_code)]
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pub fn new() -> Box<Sampler> {
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let thread_id = 0; // TODO: use winapi::um::processthreadsapi::GetThreadId
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Box::new(WindowsSampler { thread_id })
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}
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}
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impl Sampler for WindowsSampler {
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fn suspend_and_sample_thread(&self) -> Result<NativeStack, ()> {
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// Warning: The "critical section" begins here.
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// In the critical section:
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// we must not do any dynamic memory allocation,
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// nor try to acquire any lock
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// or any other unshareable resource.
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// TODO:
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// 1: use winapi::um::processthreadsapi::SuspendThread
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// 2: use winapi::um::processthreadsapi::GetThreadContext
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// 3: populate registers using the context, see
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// https://dxr.mozilla.org/mozilla-central/source/tools/profiler/core/platform-win32.cpp#129
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// 4: use winapi::um::processthreadsapi::ResumeThread
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// NOTE: End of "critical section".
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Err(())
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}
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}
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