Add -Z location-detail flag

compiler/rustc_session/src/config.rs

@@ -174,6 +174,20 @@ impl LinkerPluginLto {
     }
 }
 
+/// The different settings that can be enabled via the `-Z location-detail` flag.
+#[derive(Clone, PartialEq, Hash, Debug)]
+pub struct LocationDetail {
+    pub file: bool,
+    pub line: bool,
+    pub column: bool,
+}
+
+impl LocationDetail {
+    pub fn all() -> Self {
+        Self { file: true, line: true, column: true }
+    }
+}
+
 #[derive(Clone, PartialEq, Hash, Debug)]
 pub enum SwitchWithOptPath {
     Enabled(Option<PathBuf>),
@@ -2422,7 +2436,7 @@ crate mod dep_tracking {
     use super::LdImpl;
     use super::{
         CFGuard, CrateType, DebugInfo, ErrorOutputType, InstrumentCoverage, LinkerPluginLto,
-        LtoCli, OptLevel, OutputType, OutputTypes, Passes, SourceFileHashAlgorithm,
+        LocationDetail, LtoCli, OptLevel, OutputType, OutputTypes, Passes, SourceFileHashAlgorithm,
         SwitchWithOptPath, SymbolManglingVersion, TrimmedDefPaths,
     };
     use crate::lint;
@@ -2513,6 +2527,7 @@ crate mod dep_tracking {
         Option<LdImpl>,
         OutputType,
         RealFileName,
+        LocationDetail,
     );
 
     impl<T1, T2> DepTrackingHash for (T1, T2)

compiler/rustc_session/src/options.rs

@@ -368,6 +368,8 @@ mod desc {
         "either a boolean (`yes`, `no`, `on`, `off`, etc), `thin`, `fat`, or omitted";
     pub const parse_linker_plugin_lto: &str =
         "either a boolean (`yes`, `no`, `on`, `off`, etc), or the path to the linker plugin";
+    pub const parse_location_detail: &str =
+        "comma seperated list of location details to track: `file`, `line`, or `column`";
     pub const parse_switch_with_opt_path: &str =
         "an optional path to the profiling data output directory";
     pub const parse_merge_functions: &str = "one of: `disabled`, `trampolines`, or `aliases`";
@@ -484,6 +486,25 @@ mod parse {
         }
     }
 
+    crate fn parse_location_detail(ld: &mut LocationDetail, v: Option<&str>) -> bool {
+        if let Some(v) = v {
+            ld.line = false;
+            ld.file = false;
+            ld.column = false;
+            for s in v.split(',') {
+                match s {
+                    "file" => ld.file = true,
+                    "line" => ld.line = true,
+                    "column" => ld.column = true,
+                    _ => return false,
+                }
+            }
+            true
+        } else {
+            false
+        }
+    }
+
     crate fn parse_opt_comma_list(slot: &mut Option<Vec<String>>, v: Option<&str>) -> bool {
         match v {
             Some(s) => {
@@ -1152,6 +1173,9 @@ options! {
         "a list LLVM plugins to enable (space separated)"),
     llvm_time_trace: bool = (false, parse_bool, [UNTRACKED],
         "generate JSON tracing data file from LLVM data (default: no)"),
+    location_detail: LocationDetail = (LocationDetail::all(), parse_location_detail, [TRACKED],
+        "comma seperated list of location details to be tracked when using caller_location \
+        valid options are `file`, `line`, and `column` (default: all)"),
     ls: bool = (false, parse_bool, [UNTRACKED],
         "list the symbols defined by a library crate (default: no)"),
     macro_backtrace: bool = (false, parse_bool, [UNTRACKED],