diff options
Diffstat (limited to 'src/cmd/go/go_test.go')
-rw-r--r-- | src/cmd/go/go_test.go | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/cmd/go/go_test.go b/src/cmd/go/go_test.go index 021930a8a8..3f790cdeab 100644 --- a/src/cmd/go/go_test.go +++ b/src/cmd/go/go_test.go @@ -9,6 +9,7 @@ import ( "debug/elf" "debug/macho" "debug/pe" + "encoding/binary" "flag" "fmt" "go/format" @@ -2166,6 +2167,38 @@ func testBuildmodePIE(t *testing.T, useCgo, setBuildmodeToPIE bool) { if (dc & pe.IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE) == 0 { t.Error("IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE flag is not set") } + if useCgo { + // Test that only one symbol is exported (#40795). + // PIE binaries don´t require .edata section but unfortunately + // binutils doesn´t generate a .reloc section unless there is + // at least one symbol exported. + // See https://sourceware.org/bugzilla/show_bug.cgi?id=19011 + section := f.Section(".edata") + if section == nil { + t.Fatalf(".edata section is not present") + } + // TODO: deduplicate this struct from cmd/link/internal/ld/pe.go + type IMAGE_EXPORT_DIRECTORY struct { + _ [2]uint32 + _ [2]uint16 + _ [2]uint32 + NumberOfFunctions uint32 + NumberOfNames uint32 + _ [3]uint32 + } + var e IMAGE_EXPORT_DIRECTORY + if err := binary.Read(section.Open(), binary.LittleEndian, &e); err != nil { + t.Fatalf("binary.Read failed: %v", err) + } + + // Only _cgo_dummy_export should be exported + if e.NumberOfFunctions != 1 { + t.Fatalf("got %d exported functions; want 1", e.NumberOfFunctions) + } + if e.NumberOfNames != 1 { + t.Fatalf("got %d exported names; want 1", e.NumberOfNames) + } + } default: panic("unreachable") } |