From 84c11e41cd1e2daf8593c69d6b57b058b6c75c10 Mon Sep 17 00:00:00 2001
From: Jo Shields <directhex@apebox.org>
Date: Tue, 8 Jun 2021 14:29:16 -0400
Subject: [PATCH] Strip libmonosgen linked library (#53240)

It seems in the .symbols.nupkg package, instead of a stripped .dylib/so and companion .dwarf/.dbg, we've just been shipping unstripped libs. This commit largely duplicates the functions from eng/native/functions.cmake into an MSbuild proj, as our entire logic is already in MSbuild not CMake.
---
 src/mono/mono.proj | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/src/mono/mono.proj b/src/mono/mono.proj
index d506e6a692ebe..b115a0ebaf824 100644
--- a/src/mono/mono.proj
+++ b/src/mono/mono.proj
@@ -481,6 +481,41 @@
     <!-- build -->
     <Message Condition="'$(BuildMonoAOTCrossCompilerOnly)' != 'true'" Text="Running '$(_MonoCMakeBuildCommand)' in '$(MonoObjDir)'" Importance="High"/>
     <Exec Condition="'$(BuildMonoAOTCrossCompilerOnly)' != 'true'" Command="$(_MonoCMakeBuildCommand)" IgnoreStandardErrorWarningFormat="true" WorkingDirectory="$(MonoObjDir)"/>
+
+    <!-- strip -->
+    <PropertyGroup>
+      <MonoToolchainPrebuiltOS Condition="$([MSBuild]::IsOSPlatform('Linux'))">linux-x86_64</MonoToolchainPrebuiltOS>
+      <MonoToolchainPrebuiltOS Condition="$([MSBuild]::IsOSPlatform('OSX'))">darwin-x86_64</MonoToolchainPrebuiltOS>
+      <MonoToolchainPrebuiltOS Condition="'$(OS)' == 'Windows_NT'">windows-x86_64</MonoToolchainPrebuiltOS>
+      <_MonoRuntimeFilePath>$(MonoObjDir)out\lib\$(MonoFileName)</_MonoRuntimeFilePath>
+      <_LinuxAbi Condition="'$(TargetsAndroid)' != 'true'">gnu</_LinuxAbi>
+      <_LinuxAbi Condition="'$(TargetsAndroid)' == 'true'">android</_LinuxAbi>
+      <_LinuxFloatAbi Condition="'$(TargetsAndroid)' != 'true'">hf</_LinuxFloatAbi>
+      <_Objcopy>objcopy</_Objcopy>
+      <_Objcopy Condition="'$(Platform)' == 'arm'">arm-linux-$(_LinuxAbi)eabi$(_LinuxFloatAbi)-$(_Objcopy)</_Objcopy>
+      <_Objcopy Condition="'$(Platform)' == 'arm64'">aarch64-linux-$(_LinuxAbi)-$(_Objcopy)</_Objcopy>
+      <_Objcopy Condition="'$(Platform)' == 'x64'">x86_64-linux-$(_LinuxAbi)-$(_Objcopy)</_Objcopy>
+      <_Objcopy Condition="'$(Platform)' == 'x86'">i686-linux-$(_LinuxAbi)-$(_Objcopy)</_Objcopy>
+      <_Objcopy Condition="'$(TargetsAndroid)' == 'true'">$(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/$(MonoToolchainPrebuiltOS)/bin/$(_Objcopy)</_Objcopy>
+    </PropertyGroup>
+    <!-- test viability of objcopy command -->
+    <Exec Condition="'$(BuildMonoAOTCrossCompilerOnly)' != 'true' and $([MSBuild]::IsOSPlatform('Linux'))" Command="$(_Objcopy) -V" IgnoreStandardErrorWarningFormat="true" ContinueOnError="WarnAndContinue" IgnoreExitCode="true" EchoOff="true" ConsoleToMsBuild="true">
+      <Output TaskParameter="ExitCode" PropertyName="_ObjcopyFound"/>
+    </Exec>
+    <PropertyGroup>
+      <!-- if all else fails in finding a valid objcopy, fall back to no-prefix from $PATH (used for x64 on CentOS) -->
+      <_Objcopy Condition="'$(_ObjcopyFound)' != '0'">objcopy</_Objcopy>
+    </PropertyGroup>
+    <ItemGroup>
+      <FilesToStrip Include="$(_MonoRuntimeFilePath)" />
+      <FilesToStrip Include="$([System.IO.Directory]::GetParent($(_MonoRuntimeFilePath)))\libmono-component-*$(SharedLibExt)" />
+    </ItemGroup>
+    <Message Condition="'$(BuildMonoAOTCrossCompilerOnly)' != 'true' and ($([MSBuild]::IsOSPlatform('OSX')) or $([MSBuild]::IsOSPlatform('Linux')))" Text="Stripping debug symbols from %(FilesToStrip.Identity)" Importance="High"/>
+    <Exec Condition="'$(BuildMonoAOTCrossCompilerOnly)' != 'true' and $([MSBuild]::IsOSPlatform('OSX'))" Command="dsymutil --flat --minimize %(FilesToStrip.Identity)" IgnoreStandardErrorWarningFormat="true" WorkingDirectory="$(MonoObjDir)"/>
+    <Exec Condition="'$(BuildMonoAOTCrossCompilerOnly)' != 'true' and $([MSBuild]::IsOSPlatform('OSX'))" Command="strip -no_code_signature_warning -S %(FilesToStrip.Identity)" IgnoreStandardErrorWarningFormat="true" WorkingDirectory="$(MonoObjDir)"/>
+    <Exec Condition="'$(BuildMonoAOTCrossCompilerOnly)' != 'true' and $([MSBuild]::IsOSPlatform('Linux'))" Command="$(_Objcopy) --only-keep-debug %(FilesToStrip.Identity) %(FilesToStrip.Identity).dbg" IgnoreStandardErrorWarningFormat="true" WorkingDirectory="$(MonoObjDir)"/>
+    <Exec Condition="'$(BuildMonoAOTCrossCompilerOnly)' != 'true' and $([MSBuild]::IsOSPlatform('Linux'))" Command="$(_Objcopy) --strip-unneeded %(FilesToStrip.Identity)" IgnoreStandardErrorWarningFormat="true" WorkingDirectory="$(MonoObjDir)"/>
+    <Exec Condition="'$(BuildMonoAOTCrossCompilerOnly)' != 'true' and $([MSBuild]::IsOSPlatform('Linux'))" Command="$(_Objcopy) --add-gnu-debuglink=%(FilesToStrip.Identity).dbg %(FilesToStrip.Identity)" IgnoreStandardErrorWarningFormat="true" WorkingDirectory="$(MonoObjDir)"/>
   </Target>
 
   <!-- Build AOT cross compiler (if available) -->
@@ -705,9 +740,17 @@
     <ItemGroup>
       <_MonoRuntimeComponentsStaticFilePath Include="$([System.IO.Directory]::GetParent($(_MonoRuntimeFilePath)))\libmono-component-*$(StaticLibExt)" Condition="Exists($(_MonoRuntimeFilePath))" />
       <_MonoRuntimeComponentsSharedFilePath Include="$([System.IO.Directory]::GetParent($(_MonoRuntimeFilePath)))\libmono-component-*$(SharedLibExt)" Condition="Exists($(_MonoRuntimeFilePath))" />
+      <_MonoRuntimeComponentsSharedFilePath Include="$([System.IO.Directory]::GetParent($(_MonoRuntimeFilePath)))\libmono-component-*$(SharedLibExt).dwarf" Condition="Exists('$(_MonoRuntimeFilePath).dwarf')" />
+      <_MonoRuntimeComponentsSharedFilePath Include="$([System.IO.Directory]::GetParent($(_MonoRuntimeFilePath)))\libmono-component-*$(SharedLibExt).dbg" Condition="Exists('$(_MonoRuntimeFilePath).dbg')" />
       <_MonoRuntimeArtifacts Include="$(_MonoRuntimeFilePath)" Condition="Exists($(_MonoRuntimeFilePath))">
         <Destination>$(RuntimeBinDir)$(MonoFileName)</Destination>
       </_MonoRuntimeArtifacts>
+      <_MonoRuntimeArtifacts Include="$(_MonoRuntimeFilePath).dbg" Condition="Exists('$(_MonoRuntimeFilePath).dbg')">
+        <Destination>$(RuntimeBinDir)$(MonoFileName).dbg</Destination>
+      </_MonoRuntimeArtifacts>
+      <_MonoRuntimeArtifacts Include="$(_MonoRuntimeFilePath).dwarf" Condition="Exists('$(_MonoRuntimeFilePath).dwarf')">
+        <Destination>$(RuntimeBinDir)$(MonoFileName).dwarf</Destination>
+      </_MonoRuntimeArtifacts>
       <_MonoRuntimeArtifacts Include="$(_MonoRuntimeStaticFilePath)" Condition="Exists($(_MonoRuntimeStaticFilePath)) and '$(_MonoRuntimeStaticFilePath)' != '$(_MonoRuntimeFilePath)'">
         <Destination>$(RuntimeBinDir)$(MonoStaticLibFileName)</Destination>
       </_MonoRuntimeArtifacts>