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add couple of debug utils

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This commit is contained in:
Aleksey Kladov 2019-06-04 00:25:43 +03:00
parent 6aa8d8b99d
commit 5264711b5d
3 changed files with 36 additions and 4 deletions
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9
Cargo.lock generated
View File

@ -41,7 +41,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "backtrace"
version = "0.3.26"
version = "0.3.28"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
@ -381,7 +381,7 @@ name = "error-chain"
version = "0.12.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"backtrace 0.3.26 (registry+https://github.com/rust-lang/crates.io-index)",
"backtrace 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)",
"version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
]
@ -390,7 +390,7 @@ name = "failure"
version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"backtrace 0.3.26 (registry+https://github.com/rust-lang/crates.io-index)",
"backtrace 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)",
"failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
]
@ -1179,6 +1179,7 @@ dependencies = [
name = "ra_prof"
version = "0.1.0"
dependencies = [
"backtrace 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)",
"itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
"once_cell 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
@ -1986,7 +1987,7 @@ dependencies = [
"checksum arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "92c7fb76bc8826a8b33b4ee5bb07a247a81e76764ab4d55e8f73e3a4d8808c71"
"checksum atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"
"checksum autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "0e49efa51329a5fd37e7c79db4621af617cd4e3e5bc224939808d076077077bf"
"checksum backtrace 0.3.26 (registry+https://github.com/rust-lang/crates.io-index)" = "1a13fc43f04daf08ab4f71e3d27e1fc27fc437d3e95ac0063a796d92fb40f39b"
"checksum backtrace 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)" = "d0c18049b371fef38d66b2d69643618023d9d6b4e62891019f3359e88f73922a"
"checksum backtrace-sys 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)" = "797c830ac25ccc92a7f8a7b9862bde440715531514594a6154e3d4a54dd769b6"
"checksum base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
"checksum bit-set 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e84c238982c4b1e1ee668d136c510c67a13465279c0cb367ea6baf6310620a80"

1
crates/ra_prof/Cargo.toml
View File

@ -8,3 +8,4 @@ publish = false
[dependencies]
once_cell = "0.2.0"
itertools = "0.8.0"
backtrace = "0.3.28"

30
crates/ra_prof/src/lib.rs
View File

@ -225,6 +225,36 @@ fn print(lvl: usize, msgs: &[Message], out: &mut impl Write, longer_than: Durati
}
}
/// Prints backtrace to stderr, useful for debugging.
pub fn print_backtrace() {
let bt = backtrace::Backtrace::new();
eprintln!("{:?}", bt);
}
thread_local!(static IN_SCOPE: RefCell<bool> = RefCell::new(false));
/// Allows to check if the current code is withing some dynamic scope, can be
/// useful during debugging to figure out why a function is called.
pub struct Scope {
_hidden: (),
}
impl Scope {
pub fn enter() -> Scope {
IN_SCOPE.with(|slot| *slot.borrow_mut() = true);
Scope { _hidden: () }
}
pub fn is_active() -> bool {
IN_SCOPE.with(|slot| *slot.borrow())
}
}
impl Drop for Scope {
fn drop(&mut self) {
IN_SCOPE.with(|slot| *slot.borrow_mut() = false);
}
}
#[cfg(test)]
mod tests {
use super::*;