Auto merge of rust-lang#138480 - jhpratt:rollup-y3b8wu5, r=jhpratt

Rollup of 16 pull requests

Successful merges:

 - rust-lang#136001 (Overhaul examples for PermissionsExt)
 - rust-lang#136230 (Reword incorrect documentation about SocketAddr having varying layout)
 - rust-lang#136892 (Sync Fuchsia target spec with clang Fuchsia driver)
 - rust-lang#136911 (Add documentation URL to selected jobs)
 - rust-lang#137870 ( Improve HashMap docs for const and static initializers)
 - rust-lang#138179 (Add `src/tools/x` to the main workspace)
 - rust-lang#138389 (use `expect` instead of `allow`)
 - rust-lang#138396 (Enable metrics and verbose tests in PR CI)
 - rust-lang#138398 (atomic intrinsics: clarify which types are supported and (if applicable) what happens with provenance)
 - rust-lang#138432 (fix: remove the check of lld not supporting `@response-file)`
 - rust-lang#138434 (Visit `PatField` when collecting lint levels)
 - rust-lang#138441 (update error message)
 - rust-lang#138442 (EUV: fix place of deref pattern's interior's scrutinee)
 - rust-lang#138457 (Remove usage of legacy scheme paths on RedoxOS)
 - rust-lang#138461 (Remove an outdated line from a test comment)
 - rust-lang#138466 (Remove myself from libs review)

Failed merges:

 - rust-lang#138452 (Remove `RUN_CHECK_WITH_PARALLEL_QUERIES`)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_target/src/spec/targets/aarch64_unknown_fuchsia.rs

@@ -1,6 +1,28 @@
-use crate::spec::{SanitizerSet, StackProbeType, Target, TargetMetadata, TargetOptions, base};
+use crate::spec::{
+    Cc, LinkerFlavor, Lld, SanitizerSet, StackProbeType, Target, TargetMetadata, base,
+};
 
 pub(crate) fn target() -> Target {
+    let mut base = base::fuchsia::opts();
+    base.cpu = "generic".into();
+    base.features = "+v8a,+crc,+aes,+sha2,+neon".into();
+    base.max_atomic_width = Some(128);
+    base.stack_probes = StackProbeType::Inline;
+    base.supported_sanitizers = SanitizerSet::ADDRESS
+        | SanitizerSet::CFI
+        | SanitizerSet::LEAK
+        | SanitizerSet::SHADOWCALLSTACK;
+    base.supports_xray = true;
+
+    base.add_pre_link_args(
+        LinkerFlavor::Gnu(Cc::No, Lld::No),
+        &[
+            "--execute-only",
+            // Enable the Cortex-A53 errata 843419 mitigation by default
+            "--fix-cortex-a53-843419",
+        ],
+    );
+
     Target {
         llvm_target: "aarch64-unknown-fuchsia".into(),
         metadata: TargetMetadata {
@@ -12,14 +34,6 @@ pub(crate) fn target() -> Target {
         pointer_width: 64,
         data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32".into(),
         arch: "aarch64".into(),
-        options: TargetOptions {
-            features: "+v8a".into(),
-            max_atomic_width: Some(128),
-            stack_probes: StackProbeType::Inline,
-            supported_sanitizers: SanitizerSet::ADDRESS
-                | SanitizerSet::CFI
-                | SanitizerSet::SHADOWCALLSTACK,
-            ..base::fuchsia::opts()
-        },
+        options: base,
     }
 }

compiler/rustc_target/src/spec/targets/riscv64gc_unknown_fuchsia.rs

@@ -1,6 +1,16 @@
-use crate::spec::{CodeModel, SanitizerSet, Target, TargetMetadata, TargetOptions, base};
+use crate::spec::{CodeModel, SanitizerSet, StackProbeType, Target, TargetMetadata, base};
 
 pub(crate) fn target() -> Target {
+    let mut base = base::fuchsia::opts();
+    base.code_model = Some(CodeModel::Medium);
+    base.cpu = "generic-rv64".into();
+    base.features = "+m,+a,+f,+d,+c".into();
+    base.llvm_abiname = "lp64d".into();
+    base.max_atomic_width = Some(64);
+    base.stack_probes = StackProbeType::Inline;
+    base.supported_sanitizers = SanitizerSet::SHADOWCALLSTACK;
+    base.supports_xray = true;
+
     Target {
         llvm_target: "riscv64-unknown-fuchsia".into(),
         metadata: TargetMetadata {
@@ -12,14 +22,6 @@ pub(crate) fn target() -> Target {
         pointer_width: 64,
         data_layout: "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128".into(),
         arch: "riscv64".into(),
-        options: TargetOptions {
-            code_model: Some(CodeModel::Medium),
-            cpu: "generic-rv64".into(),
-            features: "+m,+a,+f,+d,+c".into(),
-            llvm_abiname: "lp64d".into(),
-            max_atomic_width: Some(64),
-            supported_sanitizers: SanitizerSet::SHADOWCALLSTACK,
-            ..base::fuchsia::opts()
-        },
+        options: base,
     }
 }

compiler/rustc_target/src/spec/targets/x86_64_unknown_fuchsia.rs

@@ -4,7 +4,10 @@ pub(crate) fn target() -> Target {
     let mut base = base::fuchsia::opts();
     base.cpu = "x86-64".into();
     base.plt_by_default = false;
-    base.max_atomic_width = Some(64);
+    // See https://fuchsia.dev/fuchsia-src/contribute/governance/rfcs/0073_x86_64_platform_requirement,
+    // which corresponds to x86-64-v2.
+    base.features = "+cx16,+sahf,+popcnt,+sse3,+sse4.1,+sse4.2,+ssse3".into();
+    base.max_atomic_width = Some(128);
     base.stack_probes = StackProbeType::Inline;
     base.supported_sanitizers = SanitizerSet::ADDRESS | SanitizerSet::CFI | SanitizerSet::LEAK;
     base.supports_xray = true;