From a2f5a78214edc4716e6f97b97fb7839a211e8ff7 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Tue, 13 Feb 2018 21:15:41 +0000 Subject: [PATCH] compiler: don't export function descriptors for unexported names They aren't needed, and could potentially cause unlikely symbol name collisions. Also, the runtime package's reference to main could cause the runtime package to define main.main..f, which could also be defined in the main package if it does something like fmt.Print(main). That will normally work but will fail with a multiple symbol definition error when using -static-libgo. Reviewed-on: https://go-review.googlesource.com/93656 From-SVN: r257637 --- gcc/go/gofrontend/MERGE | 2 +- gcc/go/gofrontend/expressions.cc | 15 +++++++++++++++ 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE index ea7ae4bf16e..baf77e31e70 100644 --- a/gcc/go/gofrontend/MERGE +++ b/gcc/go/gofrontend/MERGE @@ -1,4 +1,4 @@ -7998e29eec43ede1cee925d87eef0b09da67d90b +5d5ea2fd05dbf369ccc53c93d4846623cdea0c47 The first line of this file holds the git revision number of the last merge done from the gofrontend repository. diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc index f50de0a5004..9792faaa0e4 100644 --- a/gcc/go/gofrontend/expressions.cc +++ b/gcc/go/gofrontend/expressions.cc @@ -1330,9 +1330,24 @@ Func_descriptor_expression::do_get_backend(Translate_context* context) else { Location bloc = Linemap::predeclared_location(); + + // The runtime package has hash/equality functions that are + // referenced by type descriptors outside of the runtime, so the + // function descriptors must be visible even though they are not + // exported. + bool is_exported_runtime = false; + if (gogo->compiling_runtime() + && gogo->package_name() == "runtime" + && (no->name().find("hash") != std::string::npos + || no->name().find("equal") != std::string::npos)) + is_exported_runtime = true; + bool is_hidden = ((no->is_function() && no->func_value()->enclosing() != NULL) + || (Gogo::is_hidden_name(no->name()) + && !is_exported_runtime) || Gogo::is_thunk(no)); + bvar = context->backend()->immutable_struct(var_name, asm_name, is_hidden, false, btype, bloc); -- 2.30.2