pprof/internal/binutils: update windows test binary

Recompiled test binary using MSYS2 gcc 10.2.0 and verified
that the binary does not trigger anti-virus using virustotal.

Fixes google#607

internal/binutils/binutils_test.go

@@ -492,9 +492,9 @@ func TestPEFile(t *testing.T) {
 		start, limit, offset uint64
 		addr                 uint64
 	}{
-		{"fake mapping", 0, math.MaxUint64, 0, 0x401560},
-		{"fixed load address", 0x400000, 0x402000, 0, 0x401560},
-		{"simulated ASLR address", 0x500000, 0x502000, 0, 0x501560},
+		{"fake mapping", 0, math.MaxUint64, 0, 0x140001594},
+		{"fixed load address", 0x140000000, 0x140002000, 0, 0x140001594},
+		{"simulated ASLR address", 0x150000000, 0x150002000, 0, 0x150001594},
 	} {
 		t.Run(tc.desc, func(t *testing.T) {
 			bu := &Binutils{}

internal/binutils/testdata/build_binaries.go

@@ -65,11 +65,16 @@ func main() {
 		}
 
 	case "windows":
+		// Many gcc enviroments may create binaries that trigger false-positives
+		// in antiviruses. MSYS2 with gcc 10.2.0 is a working environment for
+		// compiling. To setup the environment follow the guide at
+		// https://www.msys2.org/ and install gcc with `pacman -S gcc`.
 		out, err := exec.Command("gcc", "-g", "-ffile-prefix-map="+wd+"=", "-o", "exe_windows_64.exe", "hello.c").CombinedOutput()
 		log.Println(string(out))
 		if err != nil {
 			log.Fatal(err)
 		}
+		log.Println("Please verify that exe_windows_64.exe does not trigger any antivirus on `virustotal.com`.")
 	default:
 		log.Fatalf("Unsupported OS %q", runtime.GOOS)
 	}