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codegen: stop using export_name

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`export_name` creates external symbols that won't be removed when using `-Z
emit-stack-sizes`
This commit is contained in:
Jorge Aparicio 2018-12-02 17:35:26 +01:00
parent 9d0227bfeb
commit 35bb76ef5f
3 changed files with 61 additions and 55 deletions
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4
Cargo.toml
View file

@ -12,7 +12,7 @@ license = "MIT OR Apache-2.0"
name = "cortex-m-rtfm" name = "cortex-m-rtfm"
readme = "README.md" readme = "README.md"
repository = "https://github.com/japaric/cortex-m-rtfm" repository = "https://github.com/japaric/cortex-m-rtfm"
version = "0.4.0-beta.2" version = "0.4.0-beta.3"
[lib] [lib]
name = "rtfm" name = "rtfm"
@ -36,7 +36,7 @@ required-features = ["timer-queue"]
[dependencies] [dependencies]
cortex-m = "0.5.8" cortex-m = "0.5.8"
cortex-m-rt = "0.6.5" cortex-m-rt = "0.6.5"
cortex-m-rtfm-macros = { path = "macros", version = "0.4.0-beta.2" } cortex-m-rtfm-macros = { path = "macros", version = "0.4.0-beta.3" }
heapless = "0.4.0" heapless = "0.4.0"
owned-singleton = "0.1.0" owned-singleton = "0.1.0"

2
macros/Cargo.toml
View file

@ -8,7 +8,7 @@ license = "MIT OR Apache-2.0"
name = "cortex-m-rtfm-macros" name = "cortex-m-rtfm-macros"
readme = "../README.md" readme = "../README.md"
repository = "https://github.com/japaric/cortex-m-rtfm" repository = "https://github.com/japaric/cortex-m-rtfm"
version = "0.4.0-beta.2" version = "0.4.0-beta.3"
[lib] [lib]
proc-macro = true proc-macro = true

102
macros/src/codegen.rs
View file

@ -1,3 +1,5 @@
#![deny(warnings)]
use proc_macro::TokenStream; use proc_macro::TokenStream;
use std::{ use std::{
collections::HashMap, collections::HashMap,
@ -58,23 +60,23 @@ impl Default for Context {
fn default() -> Self { fn default() -> Self {
Context { Context {
#[cfg(feature = "timer-queue")] #[cfg(feature = "timer-queue")]
baseline: mk_ident(), baseline: mk_ident(None),
enums: HashMap::new(), enums: HashMap::new(),
free_queues: Aliases::new(), free_queues: Aliases::new(),
idle: mk_ident(), idle: mk_ident(Some("idle")),
init: mk_ident(), init: mk_ident(Some("init")),
inputs: Aliases::new(), inputs: Aliases::new(),
priority: mk_ident(), priority: mk_ident(None),
ready_queues: HashMap::new(), ready_queues: HashMap::new(),
statics: Aliases::new(), statics: Aliases::new(),
resources: HashMap::new(), resources: HashMap::new(),
#[cfg(feature = "timer-queue")] #[cfg(feature = "timer-queue")]
scheduleds: Aliases::new(), scheduleds: Aliases::new(),
spawn_fn: Aliases::new(), spawn_fn: Aliases::new(),
schedule_enum: mk_ident(), schedule_enum: mk_ident(None),
schedule_fn: Aliases::new(), schedule_fn: Aliases::new(),
tasks: Aliases::new(), tasks: Aliases::new(),
timer_queue: mk_ident(), timer_queue: mk_ident(None),
} }
} }
} }
@ -216,7 +218,7 @@ fn resources(ctxt: &mut Context, app: &App, analysis: &Analysis) -> proc_macro2:
pub static #mut_ #name: #ty = #expr; pub static #mut_ #name: #ty = #expr;
)); ));
let alias = mk_ident(); let alias = mk_ident(None);
if let Some(Ownership::Shared { ceiling }) = analysis.ownerships.get(name) { if let Some(Ownership::Shared { ceiling }) = analysis.ownerships.get(name) {
items.push(mk_resource( items.push(mk_resource(
ctxt, ctxt,
@ -231,7 +233,7 @@ fn resources(ctxt: &mut Context, app: &App, analysis: &Analysis) -> proc_macro2:
ctxt.statics.insert(name.clone(), alias); ctxt.statics.insert(name.clone(), alias);
} else { } else {
let alias = mk_ident(); let alias = mk_ident(None);
let symbol = format!("{}::{}", name, alias); let symbol = format!("{}::{}", name, alias);
items.push( items.push(
@ -239,14 +241,14 @@ fn resources(ctxt: &mut Context, app: &App, analysis: &Analysis) -> proc_macro2:
.map(|expr| { .map(|expr| {
quote!( quote!(
#(#attrs)* #(#attrs)*
#[export_name = #symbol] #[doc = #symbol]
static mut #alias: #ty = #expr; static mut #alias: #ty = #expr;
) )
}) })
.unwrap_or_else(|| { .unwrap_or_else(|| {
quote!( quote!(
#(#attrs)* #(#attrs)*
#[export_name = #symbol] #[doc = #symbol]
static mut #alias: rtfm::export::MaybeUninit<#ty> = static mut #alias: rtfm::export::MaybeUninit<#ty> =
rtfm::export::MaybeUninit::uninitialized(); rtfm::export::MaybeUninit::uninitialized();
) )
@ -282,7 +284,8 @@ fn resources(ctxt: &mut Context, app: &App, analysis: &Analysis) -> proc_macro2:
/// Resource proxies /// Resource proxies
pub mod resources { pub mod resources {
#(#module)* #(#module)*
})); }
));
} }
quote!(#(#items)*) quote!(#(#items)*)
@ -356,12 +359,10 @@ fn init(ctxt: &mut Context, app: &App, analysis: &Analysis) -> proc_macro2::Toke
let unsafety = &app.init.unsafety; let unsafety = &app.init.unsafety;
let device = &app.args.device; let device = &app.args.device;
let init = &ctxt.init; let init = &ctxt.init;
let name = format!("init::{}", init);
quote!( quote!(
#module #module
#(#attrs)* #(#attrs)*
#[export_name = #name]
#unsafety fn #init(mut core: rtfm::Peripherals) { #unsafety fn #init(mut core: rtfm::Peripherals) {
#(#locals)* #(#locals)*
@ -713,7 +714,7 @@ fn prelude(
needs_unsafe = true; needs_unsafe = true;
if ownership.is_owned() || mut_.is_none() { if ownership.is_owned() || mut_.is_none() {
defs.push(quote!(pub #name: &'a #mut_ #name)); defs.push(quote!(pub #name: &'a #mut_ #name));
let alias = mk_ident(); let alias = mk_ident(None);
items.push(quote!( items.push(quote!(
let #mut_ #alias = unsafe { let #mut_ #alias = unsafe {
<#name as owned_singleton::Singleton>::new() <#name as owned_singleton::Singleton>::new()
@ -723,7 +724,7 @@ fn prelude(
} else { } else {
may_call_lock = true; may_call_lock = true;
defs.push(quote!(pub #name: rtfm::Exclusive<'a, #name>)); defs.push(quote!(pub #name: rtfm::Exclusive<'a, #name>));
let alias = mk_ident(); let alias = mk_ident(None);
items.push(quote!( items.push(quote!(
let #mut_ #alias = unsafe { let #mut_ #alias = unsafe {
<#name as owned_singleton::Singleton>::new() <#name as owned_singleton::Singleton>::new()
@ -770,7 +771,7 @@ fn prelude(
} }
} }
let alias = mk_ident(); let alias = mk_ident(None);
let unsafety = if needs_unsafe { let unsafety = if needs_unsafe {
Some(quote!(unsafe)) Some(quote!(unsafe))
} else { } else {
@ -807,7 +808,7 @@ fn prelude(
continue; continue;
} }
ctxt.spawn_fn.insert(task.clone(), mk_ident()); ctxt.spawn_fn.insert(task.clone(), mk_ident(None));
} }
if kind.is_idle() { if kind.is_idle() {
@ -839,7 +840,7 @@ fn prelude(
continue; continue;
} }
ctxt.schedule_fn.insert(task.clone(), mk_ident()); ctxt.schedule_fn.insert(task.clone(), mk_ident(None));
} }
items.push(quote!( items.push(quote!(
@ -894,20 +895,19 @@ fn idle(
let unsafety = &idle.unsafety; let unsafety = &idle.unsafety;
let idle = &ctxt.idle; let idle = &ctxt.idle;
let name = format!("idle::{}", idle);
( (
quote!( quote!(
#module #module
#(#attrs)* #(#attrs)*
#[export_name = #name]
#unsafety fn #idle() -> ! { #unsafety fn #idle() -> ! {
#(#locals)* #(#locals)*
#prelude #prelude
#(#stmts)* #(#stmts)*
}), }
),
quote!(#idle()), quote!(#idle()),
) )
} else { } else {
@ -985,7 +985,8 @@ fn exceptions(ctxt: &mut Context, app: &App, analysis: &Analysis) -> Vec<proc_ma
rtfm::export::run(move || { rtfm::export::run(move || {
#(#stmts)* #(#stmts)*
}) })
}) }
)
}) })
.collect() .collect()
} }
@ -1057,7 +1058,8 @@ fn interrupts(
rtfm::export::run(move || { rtfm::export::run(move || {
#(#stmts)* #(#stmts)*
}) })
})); }
));
} }
(quote!(#(#root)*), quote!(#(#scoped)*)) (quote!(#(#root)*), quote!(#(#scoped)*))
@ -1067,10 +1069,10 @@ fn tasks(ctxt: &mut Context, app: &App, analysis: &Analysis) -> proc_macro2::Tok
let mut items = vec![]; let mut items = vec![];
for (name, task) in &app.tasks { for (name, task) in &app.tasks {
#[cfg(feature = "timer-queue")] #[cfg(feature = "timer-queue")]
let scheduleds_alias = mk_ident(); let scheduleds_alias = mk_ident(None);
let free_alias = mk_ident(); let free_alias = mk_ident(None);
let inputs_alias = mk_ident(); let inputs_alias = mk_ident(None);
let task_alias = mk_ident(); let task_alias = mk_ident(Some(&name.to_string()));
let attrs = &task.attrs; let attrs = &task.attrs;
let inputs = &task.inputs; let inputs = &task.inputs;
@ -1109,7 +1111,7 @@ fn tasks(ctxt: &mut Context, app: &App, analysis: &Analysis) -> proc_macro2::Tok
let scheduleds_symbol = format!("{}::SCHEDULED_TIMES::{}", name, scheduleds_alias); let scheduleds_symbol = format!("{}::SCHEDULED_TIMES::{}", name, scheduleds_alias);
quote!( quote!(
#[export_name = #scheduleds_symbol] #[doc = #scheduleds_symbol]
static mut #scheduleds_alias: static mut #scheduleds_alias:
rtfm::export::MaybeUninit<[rtfm::Instant; #capacity_lit]> = rtfm::export::MaybeUninit<[rtfm::Instant; #capacity_lit]> =
rtfm::export::MaybeUninit::uninitialized(); rtfm::export::MaybeUninit::uninitialized();
@ -1138,28 +1140,26 @@ fn tasks(ctxt: &mut Context, app: &App, analysis: &Analysis) -> proc_macro2::Tok
#[cfg(not(feature = "timer-queue"))] #[cfg(not(feature = "timer-queue"))]
() => quote!(), () => quote!(),
}; };
let task_symbol = format!("{}::{}", name, task_alias);
let inputs_symbol = format!("{}::INPUTS::{}", name, inputs_alias); let inputs_symbol = format!("{}::INPUTS::{}", name, inputs_alias);
let free_symbol = format!("{}::FREE_QUEUE::{}", name, free_alias); let free_symbol = format!("{}::FREE_QUEUE::{}", name, free_alias);
let unsafety = &task.unsafety; let unsafety = &task.unsafety;
items.push(quote!( items.push(quote!(
// FIXME(MaybeUninit) MaybeUninit won't be necessary when core::mem::MaybeUninit // FIXME(MaybeUninit) MaybeUninit won't be necessary when core::mem::MaybeUninit
// stabilizes because heapless constructors will work in const context // stabilizes because heapless constructors will work in const context
#[export_name = #free_symbol] #[doc = #free_symbol]
static mut #free_alias: rtfm::export::MaybeUninit< static mut #free_alias: rtfm::export::MaybeUninit<
rtfm::export::FreeQueue<#capacity_ty> rtfm::export::FreeQueue<#capacity_ty>
> = rtfm::export::MaybeUninit::uninitialized(); > = rtfm::export::MaybeUninit::uninitialized();
#resource #resource
#[export_name = #inputs_symbol] #[doc = #inputs_symbol]
static mut #inputs_alias: rtfm::export::MaybeUninit<[#ty; #capacity_lit]> = static mut #inputs_alias: rtfm::export::MaybeUninit<[#ty; #capacity_lit]> =
rtfm::export::MaybeUninit::uninitialized(); rtfm::export::MaybeUninit::uninitialized();
#scheduleds_static #scheduleds_static
#(#attrs)* #(#attrs)*
#[export_name = #task_symbol]
#unsafety fn #task_alias(#baseline_arg #(#inputs,)*) { #unsafety fn #task_alias(#baseline_arg #(#inputs,)*) {
#(#locals)* #(#locals)*
@ -1198,8 +1198,8 @@ fn dispatchers(
let mut dispatchers = vec![]; let mut dispatchers = vec![];
for (level, dispatcher) in &analysis.dispatchers { for (level, dispatcher) in &analysis.dispatchers {
let ready_alias = mk_ident(); let ready_alias = mk_ident(None);
let enum_alias = mk_ident(); let enum_alias = mk_ident(None);
let tasks = &dispatcher.tasks; let tasks = &dispatcher.tasks;
let capacity = mk_typenum_capacity(dispatcher.capacity, true); let capacity = mk_typenum_capacity(dispatcher.capacity, true);
@ -1221,7 +1221,7 @@ fn dispatchers(
#[allow(non_camel_case_types)] #[allow(non_camel_case_types)]
enum #enum_alias { #(#tasks,)* } enum #enum_alias { #(#tasks,)* }
#[export_name = #symbol] #[doc = #symbol]
static mut #ready_alias: #e::MaybeUninit<#ty> = #e::MaybeUninit::uninitialized(); static mut #ready_alias: #e::MaybeUninit<#ty> = #e::MaybeUninit::uninitialized();
#resource #resource
@ -1516,7 +1516,7 @@ fn timer_queue(ctxt: &Context, app: &App, analysis: &Analysis) -> proc_macro2::T
let tq = &ctxt.timer_queue; let tq = &ctxt.timer_queue;
let symbol = format!("TIMER_QUEUE::{}", tq); let symbol = format!("TIMER_QUEUE::{}", tq);
items.push(quote!( items.push(quote!(
#[export_name = #symbol] #[doc = #symbol]
static mut #tq: static mut #tq:
rtfm::export::MaybeUninit<rtfm::export::TimerQueue<#enum_, #cap>> = rtfm::export::MaybeUninit<rtfm::export::TimerQueue<#enum_, #cap>> =
rtfm::export::MaybeUninit::uninitialized(); rtfm::export::MaybeUninit::uninitialized();
@ -1731,7 +1731,7 @@ fn mk_typenum_capacity(capacity: u8, power_of_two: bool) -> proc_macro2::TokenSt
quote!(rtfm::export::consts::#ident) quote!(rtfm::export::consts::#ident)
} }
fn mk_ident() -> Ident { fn mk_ident(name: Option<&str>) -> Ident {
static CALL_COUNT: AtomicUsize = AtomicUsize::new(0); static CALL_COUNT: AtomicUsize = AtomicUsize::new(0);
let elapsed = SystemTime::now().duration_since(UNIX_EPOCH).unwrap(); let elapsed = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
@ -1754,19 +1754,25 @@ fn mk_ident() -> Ident {
*v = ((count >> (i * 8)) & 0xFF) as u8 *v = ((count >> (i * 8)) & 0xFF) as u8
} }
let mut rng = rand::rngs::SmallRng::from_seed(seed); let n;
Ident::new( let mut s = if let Some(name) = name {
&(0..16) n = 4;
.map(|i| { format!("{}_", name)
if i == 0 || rng.gen() {
('a' as u8 + rng.gen::<u8>() % 25) as char
} else { } else {
('0' as u8 + rng.gen::<u8>() % 10) as char n = 16;
String::new()
};
let mut rng = rand::rngs::SmallRng::from_seed(seed);
for i in 0..n {
if i == 0 || rng.gen() {
s.push(('a' as u8 + rng.gen::<u8>() % 25) as char)
} else {
s.push(('0' as u8 + rng.gen::<u8>() % 10) as char)
} }
}) }
.collect::<String>(),
Span::call_site(), Ident::new(&s, Span::call_site())
)
} }
// `once = true` means that these locals will be called from a function that will run *once* // `once = true` means that these locals will be called from a function that will run *once*