rustbuild: include channel in sanitizers installed name

[Keruspe]

Allows parallel install of different rust channels.

I'm not sure if the channel is the right thing to use there, but currently both beta and nightly try to install e.g. /usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_rt.asan.a when before (and in current stable) it used to be /usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_asan-45a4390180e83d28.rlib which contained a hash, making it unique.
With this patch, /usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc-nightly_rt.asan.a gets installed

[rust-highfive]

r? @nikomatsakis

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[Mark-Simulacrum]

Have you verified that the sanitizers continue to be found and such? I would have expected us to need to change something outside the compiler, but I don't remember how we locate sanitizers...

[Keruspe]

After double checking, it only worked because beta is also installed, without this patch, so it's using the one from beta. Marked the PR as WIP until I figure out where else the name needs to be changed

[tmiasko]

The code that links sanitizer runtimes and needs equivalent changes is here:

rust/src/librustc_codegen_ssa/back/link.rs

Lines 748 to 787 in a29424a

	fnlink_sanitizer_runtime(sess:&Session,crate_type: config::CrateType,linker:&mutdynLinker){
	let sanitizer = match&sess.opts.debugging_opts.sanitizer{
	Some(s) => s,
	None => return,
	};
	if crate_type != config::CrateType::Executable{
	return;
	}
	let name = match sanitizer {
	Sanitizer::Address => "asan",
	Sanitizer::Leak => "lsan",
	Sanitizer::Memory => "msan",
	Sanitizer::Thread => "tsan",
	};
	let default_sysroot = filesearch::get_or_default_sysroot();
	let default_tlib =
	filesearch::make_target_lib_path(&default_sysroot, sess.opts.target_triple.triple());
	match sess.opts.target_triple.triple(){
	"x86_64-apple-darwin" => {
	// On Apple platforms, the sanitizer is always built as a dylib, and
	// LLVM will link to `@rpath/*.dylib`, so we need to specify an
	// rpath to the library as well (the rpath should be absolute, see
	// PR #41352 for details).
	let libname = format!("rustc_rt.{}", name);
	let rpath = default_tlib.to_str().expect("non-utf8 component in path");
	linker.args(&["-Wl,-rpath".into(),"-Xlinker".into(), rpath.into()]);
	linker.link_dylib(Symbol::intern(&libname));
	}
	"x86_64-unknown-linux-gnu" | "x86_64-fuchsia" | "aarch64-fuchsia" => {
	let filename = format!("librustc_rt.{}.a", name);
	let path = default_tlib.join(&filename);
	linker.link_whole_rlib(&path);
	}
	_ => {}
	}
	}

[Keruspe]

Found that with ripgrep, yep. testing in progress. Thanks for the hints

[Keruspe]

@Mark-Simulacrum it now properly works as expected

[rust-highfive]

The job mingw-check of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

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2020-02-10T08:36:29.2506312Z ========================== Starting Command Output ===========================
2020-02-10T08:36:29.2796011Z [command]/bin/bash --noprofile --norc /home/vsts/work/_temp/820f4414-1a5f-4a85-90e5-750a565ef38c.sh
2020-02-10T08:36:29.2796061Z 2020-02-10T08:36:29.2799622Z ##[section]Finishing: Disable git automatic line ending conversion
2020-02-10T08:36:29.2805323Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/68994/merge to s
2020-02-10T08:36:29.2806820Z Task : Get sources
2020-02-10T08:36:29.2806854Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-02-10T08:36:29.2806900Z Version : 1.0.0
2020-02-10T08:36:29.2806931Z Author : Microsoft
---
2020-02-10T08:36:30.1914576Z ##[command]git remote add origin https://github.com/rust-lang/rust
2020-02-10T08:36:30.2023786Z ##[command]git config gc.auto 0
2020-02-10T08:36:30.2085215Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2020-02-10T08:36:30.2121233Z ##[command]git config --get-all http.proxy
2020-02-10T08:36:30.2293755Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/68994/merge:refs/remotes/pull/68994/merge
---
2020-02-10T08:45:16.3737789Z Checking rustc_resolve v0.0.0 (/checkout/src/librustc_resolve)
2020-02-10T08:45:19.5452620Z Checking rustc_plugin_impl v0.0.0 (/checkout/src/librustc_plugin_impl)
2020-02-10T08:45:19.7425029Z Checking rustc_privacy v0.0.0 (/checkout/src/librustc_privacy)
2020-02-10T08:45:21.2498188Z error[E0599]: no method named `map_or_default` found for enum `std::option::Option<&str>` in the current scope
2020-02-10T08:45:21.2498556Z --> src/librustc_codegen_ssa/back/link.rs:768:54
2020-02-10T08:45:21.2498841Z |
2020-02-10T08:45:21.2499176Z 768 | let channel = option_env!("CFG_RELEASE_CHANNEL").map_or_default(|channel| format!("-{}", channel));
2020-02-10T08:45:21.2499655Z 2020-02-10T08:45:22.7096242Z error: aborting due to previous error
2020-02-10T08:45:22.7096401Z 2020-02-10T08:45:22.7102053Z For more information about this error, try `rustc --explain E0599`.
2020-02-10T08:45:22.7102053Z For more information about this error, try `rustc --explain E0599`.
2020-02-10T08:45:22.7146008Z error: could not compile `rustc_codegen_ssa`.
2020-02-10T08:45:22.7146331Z warning: build failed, waiting for other jobs to finish...
2020-02-10T08:45:26.5501215Z error: build failed
2020-02-10T08:45:26.5539053Z command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "check" "-Zconfig-profile" "--target" "x86_64-unknown-linux-gnu" "-Zbinary-dep-depinfo" "-j" "2" "--release" "--color" "always" "--features" " llvm" "--manifest-path" "/checkout/src/rustc/Cargo.toml" "--message-format" "json-render-diagnostics"
2020-02-10T08:45:26.5549655Z failed to run: /checkout/obj/build/bootstrap/debug/bootstrap check
2020-02-10T08:45:26.5549950Z Build completed unsuccessfully in 0:05:51
2020-02-10T08:45:26.5599824Z == clock drift check ==
2020-02-10T08:45:26.5618823Z local time: Mon Feb 10 08:45:26 UTC 2020
2020-02-10T08:45:26.5618823Z local time: Mon Feb 10 08:45:26 UTC 2020
2020-02-10T08:45:26.8389611Z network time: Mon, 10 Feb 2020 08:45:26 GMT
2020-02-10T08:45:26.8394892Z == end clock drift check ==
2020-02-10T08:45:27.6828023Z 2020-02-10T08:45:27.6922090Z ##[error]Bash exited with code '1'.
2020-02-10T08:45:27.6935001Z ##[section]Finishing: Run build
2020-02-10T08:45:27.6952720Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/68994/merge to s
2020-02-10T08:45:27.6954398Z Task : Get sources
2020-02-10T08:45:27.6954442Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-02-10T08:45:27.6954486Z Version : 1.0.0
2020-02-10T08:45:27.6954543Z Author : Microsoft
2020-02-10T08:45:27.6954543Z Author : Microsoft
2020-02-10T08:45:27.6954587Z Help : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
2020-02-10T08:45:27.6954648Z ==============================================================================
2020-02-10T08:45:28.1144824Z Cleaning any cached credential from repository: rust-lang/rust (GitHub)
2020-02-10T08:45:28.1192447Z ##[section]Finishing: Checkout rust-lang/rust@refs/pull/68994/merge to s
2020-02-10T08:45:28.1346782Z Cleaning up task key
2020-02-10T08:45:28.1347600Z Start cleaning up orphan processes.
2020-02-10T08:45:28.1457309Z Terminate orphan process: pid (3674) (python)
2020-02-10T08:45:28.1644046Z ##[section]Finishing: Finalize Job

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[Mark-Simulacrum]

r=me with commits squashed into one

[Keruspe]

squashed

[Mark-Simulacrum]

@bors r+

[bors]

📌 Commit 1bba9cf has been approved by Mark-Simulacrum