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SimpleJit perf map (#571)

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* SimpleJit perf map
This commit is contained in:
bjorn3
2018-11-02 20:57:14 +01:00
committed by Dan Gohman
parent 9471c06da4
commit 6f8c3012c6
1 changed files with 13 additions and 1 deletions
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14
lib/simplejit/src/backend.rs
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@@ -11,6 +11,7 @@ use libc;
use memory::Memory; use memory::Memory;
use std::collections::HashMap; use std::collections::HashMap;
use std::ffi::CString; use std::ffi::CString;
use std::io::Write;
use std::ptr; use std::ptr;
use target_lexicon::PointerWidth; use target_lexicon::PointerWidth;
#[cfg(windows)] #[cfg(windows)]
@@ -167,7 +168,7 @@ impl<'simple_jit_backend> Backend for SimpleJITBackend {
fn define_function( fn define_function(
&mut self, &mut self,
_name: &str, name: &str,
ctx: &cranelift_codegen::Context, ctx: &cranelift_codegen::Context,
_namespace: &ModuleNamespace<Self>, _namespace: &ModuleNamespace<Self>,
code_size: u32, code_size: u32,
@@ -177,6 +178,17 @@ impl<'simple_jit_backend> Backend for SimpleJITBackend {
.code_memory .code_memory
.allocate(size) .allocate(size)
.expect("TODO: handle OOM etc."); .expect("TODO: handle OOM etc.");
if cfg!(target_os = "linux") && ::std::env::var_os("PERF_BUILDID_DIR").is_some() {
let mut map_file = ::std::fs::OpenOptions::new()
.create(true)
.append(true)
.open(format!("/tmp/perf-{}.map", ::std::process::id()))
.unwrap();
writeln!(map_file, "{:x} {:x} {}", ptr as usize, code_size, name);
}
let mut reloc_sink = SimpleJITRelocSink::new(); let mut reloc_sink = SimpleJITRelocSink::new();
// Ignore traps for now. For now, frontends should just avoid generating code // Ignore traps for now. For now, frontends should just avoid generating code
// that traps. // that traps.