1 files changed, 24 insertions, 0 deletions
diff --git a/src/internal/fuzz/counters_unsupported.go b/src/internal/fuzz/counters_unsupported.go
new file mode 100644
index 0000000..287bb4b
--- /dev/null
+++ b/src/internal/fuzz/counters_unsupported.go
@@ -0,0 +1,24 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// TODO: expand the set of supported platforms, with testing. Nothing about
+// the instrumentation is OS specific, but only amd64 and arm64 are
+// supported in the runtime. See src/runtime/libfuzzer*.
+//
+// If you update this constraint, also update internal/platform.FuzzInstrumented.
+//
+//go:build !((darwin || linux || windows || freebsd) && (amd64 || arm64))
+
+package fuzz
+
+// TODO(#48504): re-enable on platforms where instrumentation works.
+// In theory, we shouldn't need this file at all: if the binary was built
+// without coverage, then _counters and _ecounters should have the same address.
+// However, this caused an init failure on aix/ppc64, so it's disabled here.
+
+// coverage returns a []byte containing unique 8-bit counters for each edge of
+// the instrumented source code. This coverage data will only be generated if
+// `-d=libfuzzer` is set at build time. This can be used to understand the code
+// coverage of a test execution.
+func coverage() []byte { return nil }