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Use OutputFilenames to generate output file for -Zllvm-time-trace

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The resulting profile will include the crate name and will be stored in
the `--out-dir` directory.

This implementation makes it convenient to use LLVM time trace together
with cargo, in the contrast to the previous implementation which would
overwrite profiles or store them in `.cargo/registry/..`.
This commit is contained in:
Tomasz Miąsko 2021-12-13 00:00:00 +00:00
parent 06a6674a7d
commit 3f2a1c9c17
7 changed files with 16 additions and 6 deletions
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6
compiler/rustc_codegen_llvm/src/llvm_util.rs
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@ -4,6 +4,7 @@ use libc::c_int;
use libloading::Library;
use rustc_codegen_ssa::target_features::supported_target_features;
use rustc_data_structures::fx::FxHashSet;
use rustc_fs_util::path_to_c_string;
use rustc_middle::bug;
use rustc_session::config::PrintRequest;
use rustc_session::Session;
@ -13,6 +14,7 @@ use std::ffi::{CStr, CString};
use tracing::debug;
use std::mem;
use std::path::Path;
use std::ptr;
use std::slice;
use std::str;
@ -134,9 +136,9 @@ unsafe fn configure_llvm(sess: &Session) {
llvm::LLVMRustSetLLVMOptions(llvm_args.len() as c_int, llvm_args.as_ptr());
}
pub fn time_trace_profiler_finish(file_name: &str) {
pub fn time_trace_profiler_finish(file_name: &Path) {
unsafe {
let file_name = CString::new(file_name).unwrap();
let file_name = path_to_c_string(file_name);
llvm::LLVMTimeTraceProfilerFinish(file_name.as_ptr());
}
}