Adjust to mimalloc v3.0.1 and enable mimalloc arm64

Author: hjyamauchi

utils/build.ps1

@@ -1539,7 +1539,6 @@ function Build-Compilers() {
 }
 
 # Reference: https://github.com/microsoft/mimalloc/tree/dev/bin#minject
-# TODO: Add ARM64
 function Build-Mimalloc() {
   [CmdletBinding(PositionalBinding = $false)]
   param
@@ -1548,15 +1547,11 @@ function Build-Mimalloc() {
     [hashtable]$Arch
   )
 
-  if ($Arch -ne $ArchX64) {
-    throw "mimalloc is currently supported for X64 only"
-  }
-
   $MSBuildArgs = @("$SourceCache\mimalloc\ide\vs2022\mimalloc.sln")
   $MSBuildArgs += "-noLogo"
   $MSBuildArgs += "-maxCpuCount"
   $MSBuildArgs += "-p:Configuration=Release"
-  $MSBuildArgs += "-p:ProductArchitecture=$($Arch.VSName)"
+  $MSBuildArgs += "-p:Platform=$($Arch.ShortName)"
 
   Isolate-EnvVars {
     Invoke-VsDevShell $Arch
@@ -1569,9 +1564,17 @@ function Build-Mimalloc() {
 
   Invoke-Program $msbuild @MSBuildArgs
 
-  $Products = @( "mimalloc-override.dll", "mimalloc-redirect.dll" )
+  $HostSuffix = if ($Arch -eq $ArchX64) { "" } else { "-arm64" }
+  $BuildSuffix = if ($BuildArch -eq $ArchX64) { "" } else { "-arm64" }
+  $Products = @( "mimalloc.dll" )
   foreach ($Product in $Products) {
-    Copy-Item -Path "$SourceCache\mimalloc\out\msvc-$($Arch.ShortName)\Release\$Product" -Destination "$(Arch.ToolchainInstallRoot)\usr\bin"
+    Copy-Item -Path "$SourceCache\mimalloc\out\msvc-$($Arch.ShortName)\Release\$Product" -Destination "$($Arch.ToolchainInstallRoot)\usr\bin"
+  }
+  Copy-Item -Path "$SourceCache\mimalloc\out\msvc-$($Arch.ShortName)\Release\mimalloc-redirect$HostSuffix.dll" -Destination "$($Arch.ToolchainInstallRoot)\usr\bin"
+  # When cross-compiling, bundle the second mimalloc redirect dll as a workaround for
+  # https://github.com/microsoft/mimalloc/issues/997
+  if ($IsCrossCompiling) {
+    Copy-Item -Path "$SourceCache\mimalloc\out\msvc-$($Arch.ShortName)\Release\mimalloc-redirect$HostSuffix.dll" -Destination "$($Arch.ToolchainInstallRoot)\usr\bin\mimalloc-redirect$BuildSuffix.dll"
   }
 
   $Tools = @(
@@ -1588,11 +1591,11 @@ function Build-Mimalloc() {
     "ld64.lld.exe"
   )
   foreach ($Tool in $Tools) {
-    $Binary = [IO.Path]::Combine($Dest, $Tool)
+    $Binary = [IO.Path]::Combine("$($Arch.ToolchainInstallRoot)\usr\bin", $Tool)
     # Binary-patch in place
-    Invoke-Program "$SourceCache\mimalloc\bin\minject" @("-f", "-i", "-v", $Binary)
+    Invoke-Program "$SourceCache\mimalloc\bin\minject$BuildSuffix" "-f" "-i" "-v" "$Binary"
     # Log the import table
-    Invoke-Program "$SourceCache\mimalloc\bin\minject" @("-l", $Binary)
+    Invoke-Program "$SourceCache\mimalloc\bin\minject$BuildSuffix" "-l" "$Binary"
   }
 }
 
@@ -2718,12 +2721,16 @@ function Build-Installer($Arch) {
   # TODO(hjyamauchi) Re-enable the swift-inspect and swift-docc builds
   # when cross-compiling https://github.com/apple/swift/issues/71655
   $INCLUDE_SWIFT_DOCC = if ($IsCrossCompiling) { "false" } else { "true" }
-  $ENABLE_MIMALLOC = if ($Allocator -eq "mimalloc" -and $Arch -eq $ArchX64) { "true" } else { "false" }
+  $ENABLE_MIMALLOC = if ($Allocator -eq "mimalloc") { "true" } else { "false" }
+  # When cross-compiling, bundle the second mimalloc redirect dll as a workaround for
+  # https://github.com/microsoft/mimalloc/issues/997
+  $WORKAROUND_MIMALLOC_ISSUE_997 = if ($IsCrossCompiling) { "true" } else { "false" }
 
   $Properties = @{
     BundleFlavor = "offline";
     TOOLCHAIN_ROOT = "$($Arch.ToolchainInstallRoot)\";
     ENABLE_MIMALLOC = $ENABLE_MIMALLOC;
+    WORKAROUND_MIMALLOC_ISSUE_997 = $WORKAROUND_MIMALLOC_ISSUE_997;
     INCLUDE_SWIFT_DOCC = $INCLUDE_SWIFT_DOCC;
     SWIFT_DOCC_BUILD = "$($Arch.BinaryCache)\swift-docc\release";
     SWIFT_DOCC_RENDER_ARTIFACT_ROOT = "${SourceCache}\swift-docc-render-artifact";