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

Diff for: 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 {

Diff for: 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([':', ' ']) {

Diff for: 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)]

Diff for: 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)]
 

Diff for: 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

Diff for: 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

Diff for: 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

Diff for: 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