feat(go-runner): collect Go toolchain environment information

Integrate with the new instrument-hooks environment collection API to
report Go toolchain metadata (version, OS, arch) alongside benchmark
runs. Updates instrument-hooks to e86719c which adds the
set_environment/write_environment C API.

Generated with AI Agent (Claude Code)

Author: GuillaumeLagrange

go-runner/overlay/benchmark1.24.0.go

@@ -755,6 +755,7 @@ func runBenchmarks(importPath string, matchString func(pat, str string) (bool, e
 		bstate:    bstate,
 	}
 	defer main.codspeed.instrument_hooks.Close()
+	writeGoEnvironment(main.codspeed.instrument_hooks)
 
 	if Verbose() {
 		main.chatty = newChattyPrinter(main.w)

go-runner/overlay/benchmark1.24.0.patch

@@ -357,24 +357,25 @@
  		importPath: importPath,
  		benchFunc: func(b *B) {
  			for _, Benchmark := range bs {
-@@ -644,6 +754,8 @@
+@@ -644,6 +754,9 @@
  		benchTime: benchTime,
  		bstate:    bstate,
  	}
 +	defer main.codspeed.instrument_hooks.Close()
++	writeGoEnvironment(main.codspeed.instrument_hooks)
 +
  	if Verbose() {
  		main.chatty = newChattyPrinter(main.w)
  	}
-@@ -672,6 +784,7 @@
+@@ -672,6 +785,7 @@
  						chatty: b.chatty,
  						bench:  true,
  					},
 +					codspeed:  b.codspeed,
  					benchFunc: b.benchFunc,
  					benchTime: b.benchTime,
  				}
-@@ -679,6 +792,8 @@
+@@ -679,6 +793,8 @@
  			}
  			r := b.doBench()
  			if b.failed {
@@ -383,7 +384,7 @@
  				// The output could be very long here, but probably isn't.
  				// We print it all, regardless, because we don't want to trim the reason
  				// the benchmark failed.
-@@ -686,6 +801,8 @@
+@@ -686,6 +802,8 @@
  				continue
  			}
  			results := r.String()
@@ -392,7 +393,7 @@
  			if b.chatty != nil {
  				fmt.Fprintf(b.w, "%-*s\t", s.maxLen, benchName)
  			}
-@@ -746,6 +863,7 @@
+@@ -746,6 +864,7 @@
  			chatty:  b.chatty,
  			bench:   true,
  		},

go-runner/overlay/benchmark1.25.0.go

@@ -756,6 +756,7 @@ func runBenchmarks(importPath string, matchString func(pat, str string) (bool, e
 		bstate:    bstate,
 	}
 	defer main.codspeed.instrument_hooks.Close()
+	writeGoEnvironment(main.codspeed.instrument_hooks)
 
 	if Verbose() {
 		main.chatty = newChattyPrinter(main.w)

go-runner/overlay/benchmark1.25.0.patch

@@ -226,24 +226,25 @@
  		importPath: importPath,
  		benchFunc: func(b *B) {
  			for _, Benchmark := range bs {
-@@ -724,6 +755,8 @@
+@@ -724,6 +755,9 @@
  		benchTime: benchTime,
  		bstate:    bstate,
  	}
 +	defer main.codspeed.instrument_hooks.Close()
++	writeGoEnvironment(main.codspeed.instrument_hooks)
 +
  	if Verbose() {
  		main.chatty = newChattyPrinter(main.w)
  	}
-@@ -752,6 +785,7 @@
+@@ -752,6 +786,7 @@
  						chatty: b.chatty,
  						bench:  true,
  					},
 +					codspeed:  b.codspeed,
  					benchFunc: b.benchFunc,
  					benchTime: b.benchTime,
  				}
-@@ -760,6 +794,8 @@
+@@ -760,6 +795,8 @@
  			}
  			r := b.doBench()
  			if b.failed {
@@ -252,7 +253,7 @@
  				// The output could be very long here, but probably isn't.
  				// We print it all, regardless, because we don't want to trim the reason
  				// the benchmark failed.
-@@ -767,6 +803,8 @@
+@@ -767,6 +804,8 @@
  				continue
  			}
  			results := r.String()
@@ -261,7 +262,7 @@
  			if b.chatty != nil {
  				fmt.Fprintf(b.w, "%-*s\t", s.maxLen, benchName)
  			}
-@@ -827,6 +865,7 @@
+@@ -827,6 +866,7 @@
  			chatty:  b.chatty,
  			bench:   true,
  		},

go-runner/overlay/codspeed.go

@@ -13,6 +13,11 @@ import (
 	"time"
 )
 
+func writeGoEnvironment(hooks *InstrumentHooks) {
+	hooks.SetEnvironment("go", "version", runtime.Version())
+	hooks.WriteEnvironment(uint32(os.Getpid()))
+}
+
 type codspeed struct {
 	instrument_hooks *InstrumentHooks
 

go-runner/overlay/instrument-hooks.go

@@ -4,9 +4,9 @@ package testing
 #cgo CFLAGS: -I@@INSTRUMENT_HOOKS_DIR@@/includes -Wno-format -Wno-format-security
 #include "@@INSTRUMENT_HOOKS_DIR@@/dist/core.c"
 
-#define MARKER_TYPE_BENCHMARK_START c_MARKER_TYPE_BENCHMARK_START__249
-#define MARKER_TYPE_BENCHMARK_END c_MARKER_TYPE_BENCHMARK_END__250
-typedef struct instruments_root_InstrumentHooks__547 InstrumentHooks;
+#define MARKER_TYPE_BENCHMARK_START c_MARKER_TYPE_BENCHMARK_START__247
+#define MARKER_TYPE_BENCHMARK_END c_MARKER_TYPE_BENCHMARK_END__248
+typedef struct instrument_hooks_InstrumentHooks__547 InstrumentHooks;
 */
 import "C"
 import (
@@ -95,3 +95,24 @@ func (i *InstrumentHooks) AddBenchmarkTimestamps(startTimestamp, endTimestamp ui
 	C.instrument_hooks_add_marker(i.hooks, C.uint32_t(pid), C.MARKER_TYPE_BENCHMARK_START, C.uint64_t(startTimestamp))
 	C.instrument_hooks_add_marker(i.hooks, C.uint32_t(pid), C.MARKER_TYPE_BENCHMARK_END, C.uint64_t(endTimestamp))
 }
+
+func (i *InstrumentHooks) SetEnvironment(sectionName, key, value string) {
+	if i.hooks == nil {
+		return
+	}
+	sectionNameC := C.CString(sectionName)
+	keyC := C.CString(key)
+	valueC := C.CString(value)
+	defer C.free(unsafe.Pointer(sectionNameC))
+	defer C.free(unsafe.Pointer(keyC))
+	defer C.free(unsafe.Pointer(valueC))
+
+	C.instrument_hooks_set_environment(i.hooks, (*C.uint8_t)(unsafe.Pointer(sectionNameC)), (*C.uint8_t)(unsafe.Pointer(keyC)), (*C.uint8_t)(unsafe.Pointer(valueC)))
+}
+
+func (i *InstrumentHooks) WriteEnvironment(pid uint32) {
+	if i.hooks == nil {
+		return
+	}
+	C.instrument_hooks_write_environment(i.hooks, C.uint32_t(pid))
+}

go-runner/src/runner/overlay/instrument_hooks.rs

@@ -6,7 +6,7 @@ use tar::Archive;
 use tempfile::TempDir;
 
 const INSTRUMENT_HOOKS_REPO: &str = "CodSpeedHQ/instrument-hooks";
-const INSTRUMENT_HOOKS_COMMIT: &str = "1752e9e4eae585e26703932d0055a1473dd77048";
+const INSTRUMENT_HOOKS_COMMIT: &str = "e86719c70c9c0b1646db182a7c748230e243dace";
 
 /// Get the instrument-hooks directory, downloading if necessary
 /// Downloads to /tmp/codspeed-instrument-hooks-{commit}/