Rollup of 3 pull requests

src/librustc_codegen_llvm/attributes.rs

@@ -77,9 +77,15 @@ pub fn set_instrument_function(cx: &CodegenCx<'ll, '_>, llfn: &'ll Value) {
     if cx.sess().instrument_mcount() {
         // Similar to `clang -pg` behavior. Handled by the
         // `post-inline-ee-instrument` LLVM pass.
+
+        // The function name varies on platforms.
+        // See test/CodeGen/mcount.c in clang.
+        let mcount_name = CString::new(
+            cx.sess().target.target.options.target_mcount.as_str().as_bytes()).unwrap();
+
         llvm::AddFunctionAttrStringValue(
             llfn, llvm::AttributePlace::Function,
-            const_cstr!("instrument-function-entry-inlined"), const_cstr!("mcount"));
+            const_cstr!("instrument-function-entry-inlined"), &mcount_name);
     }
 }
 

src/librustc_errors/emitter.rs

@@ -6,6 +6,7 @@ use crate::{
     Level, CodeSuggestion, DiagnosticBuilder, SubDiagnostic,
     SuggestionStyle, SourceMapperDyn, DiagnosticId,
 };
+use crate::Level::Error;
 use crate::snippet::{Annotation, AnnotationType, Line, MultilineAnnotation, StyledString, Style};
 use crate::styled_buffer::StyledBuffer;
 
@@ -72,6 +73,7 @@ impl Emitter for EmitterWriter {
 
         self.fix_multispans_in_std_macros(&mut primary_span,
                                           &mut children,
+                                          &db.level,
                                           db.handler.flags.external_macro_backtrace);
 
         self.emit_messages_default(&db.level,
@@ -888,18 +890,27 @@ impl EmitterWriter {
     fn fix_multispans_in_std_macros(&mut self,
                                     span: &mut MultiSpan,
                                     children: &mut Vec<SubDiagnostic>,
+                                    level: &Level,
                                     backtrace: bool) {
         let mut spans_updated = self.fix_multispan_in_std_macros(span, backtrace);
         for child in children.iter_mut() {
             spans_updated |= self.fix_multispan_in_std_macros(&mut child.span, backtrace);
         }
+        let msg = if level == &Error {
+            "this error originates in a macro outside of the current crate \
+             (in Nightly builds, run with -Z external-macro-backtrace \
+              for more info)".to_string()
+        } else {
+            "this warning originates in a macro outside of the current crate \
+             (in Nightly builds, run with -Z external-macro-backtrace \
+              for more info)".to_string()
+        };
+
         if spans_updated {
             children.push(SubDiagnostic {
                 level: Level::Note,
                 message: vec![
-                    ("this error originates in a macro outside of the current crate \
-                      (in Nightly builds, run with -Z external-macro-backtrace \
-                       for more info)".to_string(),
+                    (msg,
                      Style::NoStyle),
                 ],
                 span: MultiSpan::new(),

src/librustc_target/spec/aarch64_unknown_linux_gnu.rs

@@ -17,6 +17,7 @@ pub fn target() -> TargetResult {
         linker_flavor: LinkerFlavor::Gcc,
         options: TargetOptions {
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01_mcount".to_string(),
             .. base
         },
     })

src/librustc_target/spec/aarch64_unknown_linux_musl.rs

@@ -17,6 +17,7 @@ pub fn target() -> TargetResult {
         linker_flavor: LinkerFlavor::Gcc,
         options: TargetOptions {
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01_mcount".to_string(),
             .. base
         },
     })

src/librustc_target/spec/aarch64_unknown_netbsd.rs

@@ -1,4 +1,4 @@
-use crate::spec::{LinkerFlavor, Target, TargetResult};
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
 
 pub fn target() -> TargetResult {
     let mut base = super::netbsd_base::opts();
@@ -16,6 +16,9 @@ pub fn target() -> TargetResult {
         target_env: String::new(),
         target_vendor: "unknown".to_string(),
         linker_flavor: LinkerFlavor::Gcc,
-        options: base,
+        options: TargetOptions {
+            target_mcount: "__mcount".to_string(),
+            .. base
+        },
     })
 }

src/librustc_target/spec/arm_unknown_linux_gnueabi.rs

@@ -18,6 +18,7 @@ pub fn target() -> TargetResult {
         options: TargetOptions {
             features: "+strict-align,+v6".to_string(),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01__gnu_mcount_nc".to_string(),
             .. base
         },
     })

src/librustc_target/spec/arm_unknown_linux_gnueabihf.rs

@@ -18,6 +18,7 @@ pub fn target() -> TargetResult {
         options: TargetOptions {
             features: "+strict-align,+v6,+vfp2".to_string(),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01__gnu_mcount_nc".to_string(),
             .. base
         }
     })

src/librustc_target/spec/arm_unknown_linux_musleabi.rs

@@ -23,6 +23,7 @@ pub fn target() -> TargetResult {
         linker_flavor: LinkerFlavor::Gcc,
         options: TargetOptions {
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01mcount".to_string(),
             .. base
         },
     })

src/librustc_target/spec/arm_unknown_linux_musleabihf.rs

@@ -23,6 +23,7 @@ pub fn target() -> TargetResult {
         linker_flavor: LinkerFlavor::Gcc,
         options: TargetOptions {
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01mcount".to_string(),
             .. base
         },
     })

src/librustc_target/spec/armv4t_unknown_linux_gnueabi.rs

@@ -19,6 +19,7 @@ pub fn target() -> TargetResult {
             // Atomic operations provided by compiler-builtins
             max_atomic_width: Some(32),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01__gnu_mcount_nc".to_string(),
             .. base
         }
     })

src/librustc_target/spec/armv5te_unknown_linux_gnueabi.rs

@@ -19,6 +19,7 @@ pub fn target() -> TargetResult {
             // Atomic operations provided by compiler-builtins
             max_atomic_width: Some(32),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01__gnu_mcount_nc".to_string(),
             .. base
         }
     })

src/librustc_target/spec/armv5te_unknown_linux_musleabi.rs

@@ -22,6 +22,7 @@ pub fn target() -> TargetResult {
             // Atomic operations provided by compiler-builtins
             max_atomic_width: Some(32),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01mcount".to_string(),
             .. base
         }
     })

src/librustc_target/spec/armv6_unknown_freebsd.rs

@@ -18,6 +18,7 @@ pub fn target() -> TargetResult {
             features: "+v6,+vfp2".to_string(),
             max_atomic_width: Some(64),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01__gnu_mcount_nc".to_string(),
             .. base
         }
     })

src/librustc_target/spec/armv6_unknown_netbsd_eabihf.rs

@@ -18,6 +18,7 @@ pub fn target() -> TargetResult {
         options: TargetOptions {
             features: "+v6,+vfp2".to_string(),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "__mcount".to_string(),
             .. base
         }
     })

src/librustc_target/spec/armv7_unknown_cloudabi_eabihf.rs

@@ -1,4 +1,4 @@
-use crate::spec::{LinkerFlavor, Target, TargetResult};
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
 
 pub fn target() -> TargetResult {
     let mut base = super::cloudabi_base::opts();
@@ -19,6 +19,9 @@ pub fn target() -> TargetResult {
         target_env: String::new(),
         target_vendor: "unknown".to_string(),
         linker_flavor: LinkerFlavor::Gcc,
-        options: base,
+        options: TargetOptions {
+            target_mcount: "\01mcount".to_string(),
+            .. base
+        },
     })
 }

src/librustc_target/spec/armv7_unknown_freebsd.rs

@@ -18,6 +18,7 @@ pub fn target() -> TargetResult {
             features: "+v7,+vfp3,+d16,+thumb2,-neon".to_string(),
             max_atomic_width: Some(64),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01__gnu_mcount_nc".to_string(),
             .. base
         }
     })

src/librustc_target/spec/armv7_unknown_linux_gnueabihf.rs

@@ -23,6 +23,7 @@ pub fn target() -> TargetResult {
             cpu: "generic".to_string(),
             max_atomic_width: Some(64),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01__gnu_mcount_nc".to_string(),
             .. base
         }
     })

src/librustc_target/spec/armv7_unknown_linux_musleabihf.rs

@@ -26,6 +26,7 @@ pub fn target() -> TargetResult {
             cpu: "generic".to_string(),
             max_atomic_width: Some(64),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\01mcount".to_string(),
             .. base
         }
     })

src/librustc_target/spec/armv7_unknown_netbsd_eabihf.rs

@@ -19,6 +19,7 @@ pub fn target() -> TargetResult {
             cpu: "generic".to_string(),
             max_atomic_width: Some(64),
             abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "__mcount".to_string(),
             .. base
         }
     })

src/librustc_target/spec/i686_apple_darwin.rs

@@ -1,4 +1,4 @@
-use crate::spec::{LinkerFlavor, Target, TargetResult};
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
 
 pub fn target() -> TargetResult {
     let mut base = super::apple_base::opts();
@@ -19,6 +19,9 @@ pub fn target() -> TargetResult {
         target_env: String::new(),
         target_vendor: "apple".to_string(),
         linker_flavor: LinkerFlavor::Gcc,
-        options: base,
+        options: TargetOptions {
+            target_mcount: "\01mcount".to_string(),
+            .. base
+        },
     })
 }

src/librustc_target/spec/i686_unknown_netbsd.rs

@@ -1,4 +1,4 @@
-use crate::spec::{LinkerFlavor, Target, TargetResult};
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
 
 pub fn target() -> TargetResult {
     let mut base = super::netbsd_base::opts();
@@ -18,6 +18,9 @@ pub fn target() -> TargetResult {
         target_env: String::new(),
         target_vendor: "unknown".to_string(),
         linker_flavor: LinkerFlavor::Gcc,
-        options: base,
+        options: TargetOptions {
+            target_mcount: "__mcount".to_string(),
+            .. base
+        },
     })
 }

src/librustc_target/spec/mips64_unknown_linux_gnuabi64.rs

@@ -17,6 +17,7 @@ pub fn target() -> TargetResult {
             cpu: "mips64r2".to_string(),
             features: "+mips64r2".to_string(),
             max_atomic_width: Some(64),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },

src/librustc_target/spec/mips64el_unknown_linux_gnuabi64.rs

@@ -17,6 +17,7 @@ pub fn target() -> TargetResult {
             cpu: "mips64r2".to_string(),
             features: "+mips64r2".to_string(),
             max_atomic_width: Some(64),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },

src/librustc_target/spec/mips_unknown_linux_gnu.rs

@@ -16,6 +16,7 @@ pub fn target() -> TargetResult {
             cpu: "mips32r2".to_string(),
             features: "+mips32r2,+fpxx,+nooddspreg".to_string(),
             max_atomic_width: Some(32),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },

src/librustc_target/spec/mips_unknown_linux_musl.rs

@@ -1,4 +1,4 @@
-use crate::spec::{LinkerFlavor, Target, TargetResult};
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
 
 pub fn target() -> TargetResult {
     let mut base = super::linux_musl_base::opts();
@@ -17,6 +17,9 @@ pub fn target() -> TargetResult {
         target_env: "musl".to_string(),
         target_vendor: "unknown".to_string(),
         linker_flavor: LinkerFlavor::Gcc,
-        options: base,
+        options: TargetOptions {
+            target_mcount: "_mcount".to_string(),
+            .. base
+        },
     })
 }

src/librustc_target/spec/mips_unknown_linux_uclibc.rs

@@ -16,6 +16,7 @@ pub fn target() -> TargetResult {
             cpu: "mips32r2".to_string(),
             features: "+mips32r2,+soft-float".to_string(),
             max_atomic_width: Some(32),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },

src/librustc_target/spec/mipsel_unknown_linux_gnu.rs

@@ -17,6 +17,7 @@ pub fn target() -> TargetResult {
             cpu: "mips32r2".to_string(),
             features: "+mips32r2,+fpxx,+nooddspreg".to_string(),
             max_atomic_width: Some(32),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },

src/librustc_target/spec/mipsel_unknown_linux_musl.rs

@@ -1,4 +1,4 @@
-use crate::spec::{LinkerFlavor, Target, TargetResult};
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
 
 pub fn target() -> TargetResult {
     let mut base = super::linux_musl_base::opts();
@@ -17,6 +17,9 @@ pub fn target() -> TargetResult {
         target_env: "musl".to_string(),
         target_vendor: "unknown".to_string(),
         linker_flavor: LinkerFlavor::Gcc,
-        options: base,
+        options: TargetOptions {
+            target_mcount: "_mcount".to_string(),
+            .. base
+        },
     })
 }

src/librustc_target/spec/mipsel_unknown_linux_uclibc.rs

@@ -17,6 +17,7 @@ pub fn target() -> TargetResult {
             cpu: "mips32r2".to_string(),
             features: "+mips32r2,+soft-float".to_string(),
             max_atomic_width: Some(32),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },

src/librustc_target/spec/mipsisa32r6_unknown_linux_gnu.rs

@@ -16,6 +16,7 @@ pub fn target() -> TargetResult {
             cpu: "mips32r6".to_string(),
             features: "+mips32r6".to_string(),
             max_atomic_width: Some(32),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },

src/librustc_target/spec/mipsisa32r6el_unknown_linux_gnu.rs

@@ -17,6 +17,7 @@ pub fn target() -> TargetResult {
             cpu: "mips32r6".to_string(),
             features: "+mips32r6".to_string(),
             max_atomic_width: Some(32),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },

src/librustc_target/spec/mipsisa64r6_unknown_linux_gnuabi64.rs

@@ -17,6 +17,7 @@ pub fn target() -> TargetResult {
             cpu: "mips64r6".to_string(),
             features: "+mips64r6".to_string(),
             max_atomic_width: Some(64),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },

src/librustc_target/spec/mipsisa64r6el_unknown_linux_gnuabi64.rs

@@ -17,6 +17,7 @@ pub fn target() -> TargetResult {
             cpu: "mips64r6".to_string(),
             features: "+mips64r6".to_string(),
             max_atomic_width: Some(64),
+            target_mcount: "_mcount".to_string(),
 
             ..super::linux_base::opts()
         },