Add flags for Valgrind build

CMakeLists.txt

@@ -253,11 +253,24 @@ option(USE_CUSTOM_LIBUV "Use Bun's recommended version of libuv (Windows only)"
 option(USE_CUSTOM_LSHPACK "Use Bun's recommended version of ls-hpack" ON)
 option(USE_BASELINE_BUILD "Build Bun for baseline (older) CPUs" OFF)
 
+option(USE_VALGRIND "Build Bun with Valgrind support (Linux only)" OFF)
+
 option(ZIG_OPTIMIZE "Optimization level for Zig" ${DEFAULT_ZIG_OPTIMIZE})
 option(USE_DEBUG_JSC "Enable assertions and use a debug build of JavaScriptCore" ${DEFAULT_USE_DEBUG_JSC})
 option(USE_UNIFIED_SOURCES "Use unified sources to speed up the build" OFF)
 option(USE_STATIC_LIBATOMIC "Statically link libatomic, requires the presence of libatomic.a" ${DEFAULT_USE_STATIC_LIBATOMIC})
 
+if(USE_VALGRIND)
+    # Disable SIMD
+    set(USE_BASELINE_BUILD ON)
+
+    if(ARCH STREQUAL "x86_64")
+        # This is for picohttpparser
+        # Valgrind cannot handle SSE4.2 instructions
+        add_compile_definitions("__SSE4_2__=0")
+    endif()
+endif()
+
 if(NOT CANARY)
     set(CANARY 0)
 endif()

package.json

@@ -17,6 +17,7 @@
   "scripts": {
     "setup": "./scripts/setup.sh",
     "build": "if [ ! -e build ]; then bun setup; fi && ninja -C build",
+    "build:valgrind": "cmake . -DZIG_OPTIMIZE=Debug -DUSE_DEBUG_JSC=ON -DCMAKE_BUILD_TYPE=Debug -GNinja -Bbuild-valgrind && ninja -Cbuild-valgrind",
     "build:release": "cmake . -DCMAKE_BUILD_TYPE=Release -GNinja -Bbuild-release && ninja -Cbuild-release",
     "build:safe": "cmake . -DZIG_OPTIMIZE=ReleaseSafe -DUSE_DEBUG_JSC=ON -DCMAKE_BUILD_TYPE=Release -GNinja -Bbuild-safe && ninja -Cbuild-safe",
     "typecheck": "tsc --noEmit && cd test && bun run typecheck",

scripts/build-mimalloc-debug.sh

@@ -18,6 +18,7 @@ cmake "${CMAKE_FLAGS[@]}" . \
     -DMI_BUILD_TESTS=OFF \
     -DMI_OSX_ZONE=OFF \
     -DMI_OSX_INTERPOSE=OFF \
+    -DMI_TRACK_VALGRIND=ON \
     -DMI_BUILD_OBJECT=ON \
     -DMI_USE_CXX=ON \
     -DMI_OVERRIDE=OFF \