cmd/compile: make LibfuzzerInitializeCounters private

Author: kyakdan

src/cmd/compile/internal/typecheck/builtin.go

@@ -267,7 +267,7 @@ func libfuzzerTraceConstCmp4(uint32, uint32)
 func libfuzzerTraceConstCmp8(uint64, uint64)
 
 // This function should be called by the fuzz target on start to register the 8bit counters with libfuzzer
-func LibfuzzerInitializeCounters()
+func libfuzzerInitializeCounters()
 
 // architecture variants
 var x86HasPOPCNT bool

src/cmd/compile/internal/typecheck/builtin/runtime.go

@@ -45,7 +45,7 @@ func libfuzzerTraceConstCmp8(arg0, arg1 uint64) {
 
 var pcTables []byte
 
-func LibfuzzerInitializeCounters() {
+func libfuzzerInitializeCounters() {
 	libfuzzerCallTraceInit(&__sanitizer_cov_8bit_counters_init, &__start___sancov_cntrs, &__stop___sancov_cntrs)
 	start := unsafe.Pointer(&__start___sancov_cntrs)
 	end := unsafe.Pointer(&__stop___sancov_cntrs)
@@ -59,6 +59,10 @@ func LibfuzzerInitializeCounters() {
 	libfuzzerCallTraceInit(&__sanitizer_cov_pcs_init, &pcTables[0], &pcTables[size-1])
 }
 
+func init() {
+	libfuzzerInitializeCounters()
+}
+
 //go:linkname __sanitizer_cov_trace_cmp1 __sanitizer_cov_trace_cmp1
 //go:cgo_import_static __sanitizer_cov_trace_cmp1
 var __sanitizer_cov_trace_cmp1 byte