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Full preemptive snapshot/resume.

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This commit is contained in:
losfair
2019-06-27 15:49:43 +08:00
parent 7d0b70bddf
commit 967027003d
15 changed files with 523 additions and 223 deletions
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28
lib/runtime-core/src/vm.rs
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@ -100,6 +100,8 @@ pub struct InternalCtx {
pub memory_bound: usize,
pub internals: *mut [u64; INTERNALS_SIZE], // TODO: Make this dynamic?
pub interrupt_signal_mem: *mut u8,
}
static INTERNAL_FIELDS: AtomicUsize = AtomicUsize::new(0);
@ -207,6 +209,17 @@ fn get_intrinsics_for_module(m: &ModuleInfo) -> *const Intrinsics {
}
}
#[cfg(all(unix, target_arch = "x86_64"))]
fn get_interrupt_signal_mem() -> *mut u8 {
unsafe { crate::alternative_stack::get_wasm_interrupt_signal_mem() }
}
#[cfg(not(all(unix, target_arch = "x86_64")))]
fn get_interrupt_signal_mem() -> *mut u8 {
static mut REGION: u64 = 0;
unsafe { &mut REGION as *mut u64 as *mut u8 }
}
impl Ctx {
#[doc(hidden)]
pub unsafe fn new(
@ -245,6 +258,8 @@ impl Ctx {
memory_bound: mem_bound,
internals: &mut local_backing.internals.0,
interrupt_signal_mem: get_interrupt_signal_mem(),
},
local_functions: local_backing.local_functions.as_ptr(),
@ -296,6 +311,8 @@ impl Ctx {
memory_bound: mem_bound,
internals: &mut local_backing.internals.0,
interrupt_signal_mem: get_interrupt_signal_mem(),
},
local_functions: local_backing.local_functions.as_ptr(),
@ -419,9 +436,13 @@ impl Ctx {
12 * (mem::size_of::<usize>() as u8)
}
pub fn offset_local_functions() -> u8 {
pub fn offset_interrupt_signal_mem() -> u8 {
13 * (mem::size_of::<usize>() as u8)
}
pub fn offset_local_functions() -> u8 {
14 * (mem::size_of::<usize>() as u8)
}
}
enum InnerFunc {}
@ -640,6 +661,11 @@ mod vm_offset_tests {
offset_of!(InternalCtx => internals).get_byte_offset(),
);
assert_eq!(
Ctx::offset_interrupt_signal_mem() as usize,
offset_of!(InternalCtx => interrupt_signal_mem).get_byte_offset(),
);
assert_eq!(
Ctx::offset_local_functions() as usize,
offset_of!(Ctx => local_functions).get_byte_offset(),