Rollup merge of rust-lang#116263 - ferrocene:pa-more-bare-metal-fixes, r=oli-obk

More fixes for running the test suite on a bare metal target

This PR adds more fixes needed to run the test suite on bare metal targets (in this case, without unwinding and with static relocations). There is no CI job exercising tests without unwinds, but I can confirm this worked in Ferrocene's CI.

Author: matthiaskrgr

src/tools/compiletest/src/common.rs

@@ -580,6 +580,8 @@ pub struct TargetCfg {
     pub(crate) sanitizers: Vec<Sanitizer>,
     #[serde(rename = "supports-xray", default)]
     pub(crate) xray: bool,
+    #[serde(default = "default_reloc_model")]
+    pub(crate) relocation_model: String,
 }
 
 impl TargetCfg {
@@ -592,6 +594,10 @@ fn default_os() -> String {
     "none".into()
 }
 
+fn default_reloc_model() -> String {
+    "pic".into()
+}
+
 #[derive(Eq, PartialEq, Clone, Debug, Default, serde::Deserialize)]
 #[serde(rename_all = "kebab-case")]
 pub enum Endian {

src/tools/compiletest/src/header/needs.rs

@@ -134,6 +134,11 @@ pub(super) fn handle_needs(
             condition: config.target_cfg().dynamic_linking,
             ignore_reason: "ignored on targets without dynamic linking",
         },
+        Need {
+            name: "needs-relocation-model-pic",
+            condition: config.target_cfg().relocation_model == "pic",
+            ignore_reason: "ignored on targets without PIC relocation model",
+        },
     ];
 
     let (name, comment) = match ln.split_once([':', ' ']) {

tests/incremental/change_crate_dep_kind.rs

@@ -5,6 +5,7 @@
 // needs-unwind
 // revisions:cfail1 cfail2
 // compile-flags: -Z query-dep-graph -Cpanic=unwind
+// needs-unwind
 // build-pass (FIXME(62277): could be check-pass?)
 
 #![feature(panic_unwind)]

tests/ui/abi/relocation_model_pic.rs

@@ -1,7 +1,6 @@
 // run-pass
 // compile-flags: -C relocation-model=pic
-// ignore-emscripten no pic
-// ignore-wasm
+// needs-relocation-model-pic
 
 #![feature(cfg_relocation_model)]
 

tests/ui/panics/short-ice-remove-middle-frames-2.rs

@@ -2,6 +2,7 @@
 // run-fail
 // check-run-results
 // exec-env:RUST_BACKTRACE=1
+// needs-unwind
 // ignore-android FIXME #17520
 // ignore-wasm no panic support
 // ignore-openbsd no support for libbacktrace without filename

tests/ui/panics/short-ice-remove-middle-frames-2.run.stderr

@@ -1,4 +1,4 @@
-thread 'main' panicked at $DIR/short-ice-remove-middle-frames-2.rs:56:5:
+thread 'main' panicked at $DIR/short-ice-remove-middle-frames-2.rs:57:5:
 debug!!!
 stack backtrace:
    0: std::panicking::begin_panic

tests/ui/panics/short-ice-remove-middle-frames.rs

@@ -2,6 +2,7 @@
 // run-fail
 // check-run-results
 // exec-env:RUST_BACKTRACE=1
+// needs-unwind
 // ignore-android FIXME #17520
 // ignore-wasm no panic support
 // ignore-openbsd no support for libbacktrace without filename

tests/ui/panics/short-ice-remove-middle-frames.run.stderr

@@ -1,4 +1,4 @@
-thread 'main' panicked at $DIR/short-ice-remove-middle-frames.rs:52:5:
+thread 'main' panicked at $DIR/short-ice-remove-middle-frames.rs:53:5:
 debug!!!
 stack backtrace:
    0: std::panicking::begin_panic