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bun.sh/cmake/tools/SetupWebKit.cmake
Jarred Sumner 8614b98f6b Disable glibcxx assertions in WebKit release non-asan builds (#22647)
### What does this PR do?

Evidently, Ubuntu turns them on by default. 

Claude:
```
> What is the typical overhead for glibcxx assertions?

⏺ The overhead of glibc/libstdc++ assertions can be significant, especially in
  performance-critical code:

  Typical Overhead Ranges:

  libstdc++ (C++ standard library) assertions:
  - 5-15% overall performance impact in typical applications
  - Up to 30-50% in container-heavy code (vectors, maps, etc.)
  - Iterator validity checks are particularly expensive

  glibc (C library) assertions:
  - 2-8% overall impact in typical applications
  - Up to 20% in malloc/free intensive code
  - Heap consistency checks, buffer overflow detection
 ```
2025-09-14 02:25:23 -07:00

102 lines
3.1 KiB
CMake

option(WEBKIT_VERSION "The version of WebKit to use")
option(WEBKIT_LOCAL "If a local version of WebKit should be used instead of downloading")
if(NOT WEBKIT_VERSION)
set(WEBKIT_VERSION 495c25e24927ba03277ae225cd42811588d03ff8)
endif()
string(SUBSTRING ${WEBKIT_VERSION} 0 16 WEBKIT_VERSION_PREFIX)
if(WEBKIT_LOCAL)
set(DEFAULT_WEBKIT_PATH ${VENDOR_PATH}/WebKit/WebKitBuild/${CMAKE_BUILD_TYPE})
else()
set(DEFAULT_WEBKIT_PATH ${CACHE_PATH}/webkit-${WEBKIT_VERSION_PREFIX})
endif()
option(WEBKIT_PATH "The path to the WebKit directory")
if(NOT WEBKIT_PATH)
set(WEBKIT_PATH ${DEFAULT_WEBKIT_PATH})
endif()
set(WEBKIT_INCLUDE_PATH ${WEBKIT_PATH}/include)
set(WEBKIT_LIB_PATH ${WEBKIT_PATH}/lib)
if(WEBKIT_LOCAL)
if(EXISTS ${WEBKIT_PATH}/cmakeconfig.h)
# You may need to run:
# make jsc-compile-debug jsc-copy-headers
include_directories(
${WEBKIT_PATH}
${WEBKIT_PATH}/JavaScriptCore/Headers/JavaScriptCore
${WEBKIT_PATH}/JavaScriptCore/PrivateHeaders
${WEBKIT_PATH}/bmalloc/Headers
${WEBKIT_PATH}/WTF/Headers
${WEBKIT_PATH}/JavaScriptCore/DerivedSources/inspector
${WEBKIT_PATH}/JavaScriptCore/PrivateHeaders/JavaScriptCore
)
endif()
# After this point, only prebuilt WebKit is supported
return()
endif()
if(WIN32)
set(WEBKIT_OS "windows")
elseif(APPLE)
set(WEBKIT_OS "macos")
elseif(UNIX)
set(WEBKIT_OS "linux")
else()
message(FATAL_ERROR "Unsupported operating system: ${CMAKE_SYSTEM_NAME}")
endif()
if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm64|aarch64")
set(WEBKIT_ARCH "arm64")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64|x64|AMD64")
set(WEBKIT_ARCH "amd64")
else()
message(FATAL_ERROR "Unsupported architecture: ${CMAKE_SYSTEM_PROCESSOR}")
endif()
if(LINUX AND ABI STREQUAL "musl")
set(WEBKIT_SUFFIX "-musl")
endif()
if(DEBUG)
set(WEBKIT_SUFFIX "${WEBKIT_SUFFIX}-debug")
elseif(ENABLE_LTO)
set(WEBKIT_SUFFIX "${WEBKIT_SUFFIX}-lto")
else()
set(WEBKIT_SUFFIX "${WEBKIT_SUFFIX}")
endif()
if(ENABLE_ASAN)
# We cannot mix and match ASan Bun + non-ASan WebKit, or vice versa, because some WebKit classes
# change their layout according to whether ASan is used, for example:
# https://github.com/oven-sh/WebKit/blob/eda8b0fb4fb1aa23db9c2b00933df8b58bcdd289/Source/WTF/wtf/Vector.h#L682
set(WEBKIT_SUFFIX "${WEBKIT_SUFFIX}-asan")
endif()
setx(WEBKIT_NAME bun-webkit-${WEBKIT_OS}-${WEBKIT_ARCH}${WEBKIT_SUFFIX})
set(WEBKIT_FILENAME ${WEBKIT_NAME}.tar.gz)
setx(WEBKIT_DOWNLOAD_URL https://github.com/oven-sh/WebKit/releases/download/autobuild-${WEBKIT_VERSION}/${WEBKIT_FILENAME})
if(EXISTS ${WEBKIT_PATH}/package.json)
file(READ ${WEBKIT_PATH}/package.json WEBKIT_PACKAGE_JSON)
if(WEBKIT_PACKAGE_JSON MATCHES ${WEBKIT_VERSION})
return()
endif()
endif()
file(DOWNLOAD ${WEBKIT_DOWNLOAD_URL} ${CACHE_PATH}/${WEBKIT_FILENAME} SHOW_PROGRESS)
file(ARCHIVE_EXTRACT INPUT ${CACHE_PATH}/${WEBKIT_FILENAME} DESTINATION ${CACHE_PATH} TOUCH)
file(REMOVE ${CACHE_PATH}/${WEBKIT_FILENAME})
file(REMOVE_RECURSE ${WEBKIT_PATH})
file(RENAME ${CACHE_PATH}/bun-webkit ${WEBKIT_PATH})
if(APPLE)
file(REMOVE_RECURSE ${WEBKIT_INCLUDE_PATH}/unicode)
endif()