https://github.com/ellishg created https://github.com/llvm/llvm-project/pull/128920
The `-memprof-runtime-default-options` LLVM flag introduced in https://github.com/llvm/llvm-project/pull/118874 creates the `__memprof_default_options_str` symbol with `WeakAnyLinkage` on Darwin. https://github.com/ellishg/llvm-project/blob/fa0202169af23419c4bcbf66eabd1beb6b6e8e34/llvm/lib/Transforms/Instrumentation/MemProfiler.cpp#L573-L576 This ensures Darwin passes `-exported_symbol ___memprof_default_options_str` to the linker so that the runtime library has visibility into this symbol. This will replace the earlier PR https://github.com/llvm/llvm-project/pull/128615 >From 2e1946730f7ae2473a4fc94f8918eb3d9d225d17 Mon Sep 17 00:00:00 2001 From: Ellis Hoag <ellish...@meta.com> Date: Wed, 26 Feb 2025 09:48:46 -0800 Subject: [PATCH] [memprof] Export __memprof_default_options_str on Darwin --- clang/lib/Driver/ToolChains/Darwin.cpp | 4 ++++ clang/test/Driver/fmemprof.cpp | 8 ++++++++ 2 files changed, 12 insertions(+) diff --git a/clang/lib/Driver/ToolChains/Darwin.cpp b/clang/lib/Driver/ToolChains/Darwin.cpp index 75f126965e0ac..a2aeef4c4c475 100644 --- a/clang/lib/Driver/ToolChains/Darwin.cpp +++ b/clang/lib/Driver/ToolChains/Darwin.cpp @@ -1617,6 +1617,10 @@ void DarwinClang::AddLinkRuntimeLibArgs(const ArgList &Args, } } + if (Sanitize.needsMemProfRt()) + if (hasExportSymbolDirective(Args)) + addExportedSymbol(CmdArgs, "___memprof_default_options_str"); + const XRayArgs &XRay = getXRayArgs(); if (XRay.needsXRayRt()) { AddLinkRuntimeLib(Args, CmdArgs, "xray"); diff --git a/clang/test/Driver/fmemprof.cpp b/clang/test/Driver/fmemprof.cpp index 5165c4452fd57..b464320e58a94 100644 --- a/clang/test/Driver/fmemprof.cpp +++ b/clang/test/Driver/fmemprof.cpp @@ -17,3 +17,11 @@ // RUN: not %clangxx --target=x86_64-linux-gnu -fprofile-generate -fmemory-profile-use=foo %s -### 2>&1 | FileCheck %s --check-prefix=CONFLICTWITHPGOINSTR // CONFLICTWITHPGOINSTR: error: invalid argument '-fmemory-profile-use=foo' not allowed with '-fprofile-generate' + +// Test that we export the __memprof_default_options_str on Darwin because it has WeakAnyLinkage +// RUN: %clangxx --target=arm64-apple-ios -fmemory-profile %s -### 2>&1 | FileCheck %s -check-prefix=EXPORT-BASE --implicit-check-not=exported_symbol +// RUN: %clangxx --target=x86_64-linux-gnu -fmemory-profile %s -### 2>&1 | FileCheck %s -check-prefix=EXPORT-BASE --implicit-check-not=exported_symbol +// RUN: %clangxx --target=arm64-apple-ios -fmemory-profile -exported_symbols_list /dev/null %s -### 2>&1 | FileCheck %s --check-prefixes=EXPORT-BASE,EXPORT +// FIXME: Darwin needs to link in the runtime, then we can use the regular CHECK prefix +// EXPORT-BASE: "-cc1" {{.*}} "-fmemory-profile" +// EXPORT: "-exported_symbol" "___memprof_default_options_str" _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
