rlbox.mozbuild - mozsearch

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# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-

# vim: set filetype=python:

# This Source Code Form is subject to the terms of the Mozilla Public

# License, v. 2.0. If a copy of the MPL was not distributed with this

# file, You can obtain one at http://mozilla.org/MPL/2.0/.

@template

def RLBoxLibrary(name):

    WASM_SOURCES += [

        "/memory/mozalloc/mozalloc.cpp",

        "/third_party/rlbox_wasm2c_sandbox/c_src/wasm2c_sandbox_wrapper.c",

    SOURCES += [f"!{name}.wasm.c"]

    SOURCES += ["/third_party/wasm2c/wasm2c/wasm-rt-impl.c"]

    # Configuration for the wasm2c runtime used by RLBox

    # Enable SIMD autovectorization

    if CONFIG["WASM_CC_VERSION"] and int(CONFIG["WASM_CC_VERSION"].split(".")[0]) >= 11:

        WASM_CXXFLAGS += ["-msimd128"]

    # Use a mmap style allocation

    DEFINES["WASM_RT_USE_MMAP"] = 1

    # Don't use internal signal handler as Firefox already provides one

    DEFINES["WASM_RT_SKIP_SIGNAL_RECOVERY"] = 1

    # We provide a custom trap handler that calls MOZ_CRASH

    DEFINES["WASM_RT_TRAP_HANDLER"] = "moz_wasm2c_trap_handler"

    # Don't limit the nested call depth

    DEFINES["WASM_RT_USE_STACK_DEPTH_COUNT"] = 0

    # Configure the wasm runtime to invoke a callback when a Wasm memory growth

    # fails inside the sandbox. This information is used to annotate crash reports.

    DEFINES["WASM_RT_GROW_FAILED_HANDLER"] = "moz_wasm2c_memgrow_failed"

    SOURCES[f"!{name}.wasm.c"].flags += [

        "-Wno-unused",

    WASM_DEFINES["MOZ_IN_WASM_SANDBOX"] = True

    if CONFIG["ENABLE_CLANG_PLUGIN"]:

        WASM_DEFINES["MOZ_CLANG_PLUGIN"] = True

    SANDBOXED_WASM_LIBRARY_NAME = f"{name}.wasm"

    # Ideally we'd also list {name}.wasm.h as an output, but that would put the

    # generation in export rather than pre-compile, and we prefer the latter.

    GeneratedFile(

        f"{name}.wasm.c",

        script="/config/wasm2c.py",

        entry_point="wasm2c",

        inputs=["!/dist/host/bin/wasm2c" + CONFIG["HOST_BIN_SUFFIX"], f"!{name}.wasm"],