Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

30 files changed, 1185 insertions, 0 deletions

diff --git a/js/src/devtools/automation/README b/js/src/devtools/automation/README
new file mode 100644
index 0000000000..70f56fd230
--- /dev/null
+++ b/js/src/devtools/automation/README
@@ -0,0 +1,39 @@
+autospider.py is intended both as the harness for running automation builds, as
+well as a way to easily reproduce automation builds on a developer workstation.
+Some brave souls also use it as the basis for doing their normal local builds.
+
+Basic usage:
+
+  ./js/src/devtools/automation/autospider.py plain
+
+The script may be run from any directory. This will configure and build the
+source, then run a series of tests. See the --help message for many different
+ways of suppressing various actions or changing the output.
+
+The different possible build+test configurations are controlled mostly by JSON
+files in a variants/ directory (eg there is a .../variants/plain file for the
+above command).
+
+In automation, the test jobs will run with a dynamically loaded library that
+catches crashes and generates minidumps, so that autospider.py can produce a
+readable stack trace at the end of the run. Currently this library is only
+available on linux64, and is built via the following procedure:
+
+    % git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
+    % export PATH=$PATH:$(pwd)/depot_tools
+    % mkdir breakpad
+    % cd breakpad
+    # python must be python2.7
+    % fetch breakpad
+    % cd src
+    % git fetch https://github.com/hotsphink/breakpad injector
+    % git checkout FETCH_HEAD
+    % cd ..
+    % mkdir obj
+    % cd obj
+    # Possibly set $PATH to include a recent gcc
+    % ../src/configure --enable-static
+    % mkdir ../root
+    % make install DESTDIR=$(pwd)/../root
+
+The shared library will now be in root/usr/local/lib64/libbreakpadinjector.so
diff --git a/js/src/devtools/automation/arm64-jittests-timeouts.txt b/js/src/devtools/automation/arm64-jittests-timeouts.txt
new file mode 100644
index 0000000000..2c23ca3535
--- /dev/null
+++ b/js/src/devtools/automation/arm64-jittests-timeouts.txt
@@ -0,0 +1,2 @@
+basic/bug1610192.js
+ion/pow-base-power-of-two.js
diff --git a/js/src/devtools/automation/arm64-jstests-slow.txt b/js/src/devtools/automation/arm64-jstests-slow.txt
new file mode 100644
index 0000000000..c4c09ac79b
--- /dev/null
+++ b/js/src/devtools/automation/arm64-jstests-slow.txt
@@ -0,0 +1,52 @@
+non262/object/15.2.3.6-dictionary-redefinition-01-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-02-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-03-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-04-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-05-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-06-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-07-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-08-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-09-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-10-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-11-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-12-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-13-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-14-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-15-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-16-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-17-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-18-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-19-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-20-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-21-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-22-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-23-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-24-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-25-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-26-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-27-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-30-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-31-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-32-of-32.js
+non262/object/15.2.3.6-middle-redefinition-1-of-8.js
+non262/object/15.2.3.6-middle-redefinition-2-of-8.js
+non262/object/15.2.3.6-middle-redefinition-3-of-8.js
+non262/object/15.2.3.6-middle-redefinition-4-of-8.js
+non262/object/15.2.3.6-middle-redefinition-5-of-8.js
+non262/object/15.2.3.6-middle-redefinition-6-of-8.js
+non262/object/15.2.3.6-middle-redefinition-7-of-8.js
+non262/object/15.2.3.6-middle-redefinition-8-of-8.js
+non262/object/15.2.3.6-redefinition-1-of-4.js
+non262/object/15.2.3.6-redefinition-2-of-4.js
+non262/object/15.2.3.6-redefinition-3-of-4.js
+non262/object/15.2.3.6-redefinition-4-of-4.js
+non262/extensions/clone-complex-object.js
+non262/reflect-parse/classes.js
+non262/reflect-parse/destructuring-variable-declarations.js
+test262/built-ins/RegExp/CharacterClassEscapes/character-class-non-whitespace-class-escape-flags-u.js
+test262/built-ins/RegExp/CharacterClassEscapes/character-class-non-digit-class-escape-flags-u.js
+test262/built-ins/RegExp/CharacterClassEscapes/character-class-non-word-class-escape-flags-u.js
+test262/built-ins/RegExp/property-escapes/generated/
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Letter.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Other.js
+test262/built-ins/RegExp/property-escapes/generated/General_Category_-_Unassigned.js
diff --git a/js/src/devtools/automation/autospider.py b/js/src/devtools/automation/autospider.py
new file mode 100755
index 0000000000..6bd14ea63d
--- /dev/null
+++ b/js/src/devtools/automation/autospider.py
@@ -0,0 +1,709 @@
+#!/usr/bin/env python3
+# 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/.
+
+
+import argparse
+import json
+import logging
+import multiprocessing
+import re
+import os
+import platform
+import posixpath
+import shutil
+import subprocess
+import sys
+
+from collections import Counter, namedtuple
+from logging import info
+from os import environ as env
+from subprocess import Popen
+from threading import Timer
+
+Dirs = namedtuple("Dirs", ["scripts", "js_src", "source", "tooltool", "fetches"])
+
+
+def directories(pathmodule, cwd, fixup=lambda s: s):
+    scripts = pathmodule.join(fixup(cwd), fixup(pathmodule.dirname(__file__)))
+    js_src = pathmodule.abspath(pathmodule.join(scripts, "..", ".."))
+    source = pathmodule.abspath(pathmodule.join(js_src, "..", ".."))
+    tooltool = pathmodule.abspath(
+        env.get("TOOLTOOL_CHECKOUT", pathmodule.join(source, "..", ".."))
+    )
+    fetches = pathmodule.abspath(
+        env.get("MOZ_FETCHES_DIR", pathmodule.join(source, "..", ".."))
+    )
+    return Dirs(scripts, js_src, source, tooltool, fetches)
+
+
+# Some scripts will be called with sh, which cannot use backslashed
+# paths. So for direct subprocess.* invocation, use normal paths from
+# DIR, but when running under the shell, use POSIX style paths.
+DIR = directories(os.path, os.getcwd())
+PDIR = directories(
+    posixpath, os.environ["PWD"], fixup=lambda s: re.sub(r"^(\w):", r"/\1", s)
+)
+env["CPP_UNIT_TESTS_DIR_JS_SRC"] = DIR.js_src
+
+AUTOMATION = env.get("AUTOMATION", False)
+
+parser = argparse.ArgumentParser(description="Run a spidermonkey shell build job")
+parser.add_argument(
+    "--verbose",
+    action="store_true",
+    default=AUTOMATION,
+    help="display additional logging info",
+)
+parser.add_argument(
+    "--dep", action="store_true", help="do not clobber the objdir before building"
+)
+parser.add_argument(
+    "--keep",
+    action="store_true",
+    help="do not delete the sanitizer output directory (for testing)",
+)
+parser.add_argument(
+    "--platform",
+    "-p",
+    type=str,
+    metavar="PLATFORM",
+    default="",
+    help='build platform, including a suffix ("-debug" or "") used '
+    'by buildbot to override the variant\'s "debug" setting. The platform can be '
+    "used to specify 32 vs 64 bits.",
+)
+parser.add_argument(
+    "--timeout",
+    "-t",
+    type=int,
+    metavar="TIMEOUT",
+    default=12600,
+    help="kill job after TIMEOUT seconds",
+)
+parser.add_argument(
+    "--objdir",
+    type=str,
+    metavar="DIR",
+    default=env.get("OBJDIR", os.path.join(DIR.source, "obj-spider")),
+    help="object directory",
+)
+group = parser.add_mutually_exclusive_group()
+group.add_argument(
+    "--optimize",
+    action="store_true",
+    help="generate an optimized build. Overrides variant setting.",
+)
+group.add_argument(
+    "--no-optimize",
+    action="store_false",
+    dest="optimize",
+    help="generate a non-optimized build. Overrides variant setting.",
+)
+group.set_defaults(optimize=None)
+group = parser.add_mutually_exclusive_group()
+group.add_argument(
+    "--debug",
+    action="store_true",
+    help="generate a debug build. Overrides variant setting.",
+)
+group.add_argument(
+    "--no-debug",
+    action="store_false",
+    dest="debug",
+    help="generate a non-debug build. Overrides variant setting.",
+)
+group.set_defaults(debug=None)
+group = parser.add_mutually_exclusive_group()
+group.add_argument(
+    "--jemalloc",
+    action="store_true",
+    dest="jemalloc",
+    help="use mozilla's jemalloc instead of the default allocator",
+)
+group.add_argument(
+    "--no-jemalloc",
+    action="store_false",
+    dest="jemalloc",
+    help="use the default allocator instead of mozilla's jemalloc",
+)
+group.set_defaults(jemalloc=None)
+parser.add_argument(
+    "--run-tests",
+    "--tests",
+    type=str,
+    metavar="TESTSUITE",
+    default="",
+    help="comma-separated set of test suites to add to the variant's default set",
+)
+parser.add_argument(
+    "--skip-tests",
+    "--skip",
+    type=str,
+    metavar="TESTSUITE",
+    default="",
+    help="comma-separated set of test suites to remove from the variant's default "
+    "set",
+)
+parser.add_argument(
+    "--build-only",
+    "--build",
+    dest="skip_tests",
+    action="store_const",
+    const="all",
+    help="only do a build, do not run any tests",
+)
+parser.add_argument(
+    "--noconf", action="store_true", help="skip running configure when doing a build"
+)
+parser.add_argument(
+    "--nobuild",
+    action="store_true",
+    help="Do not do a build. Rerun tests on existing build.",
+)
+parser.add_argument(
+    "variant", type=str, help="type of job requested, see variants/ subdir"
+)
+args = parser.parse_args()
+
+logging.basicConfig(level=logging.INFO, format="%(message)s")
+
+OBJDIR = args.objdir
+OUTDIR = os.path.join(OBJDIR, "out")
+POBJDIR = posixpath.join(PDIR.source, args.objdir)
+MAKE = env.get("MAKE", "make")
+MAKEFLAGS = env.get("MAKEFLAGS", "-j6" + ("" if AUTOMATION else " -s"))
+PYTHON = sys.executable
+
+for d in ("scripts", "js_src", "source", "tooltool", "fetches"):
+    info("DIR.{name} = {dir}".format(name=d, dir=getattr(DIR, d)))
+
+
+def set_vars_from_script(script, vars):
+    """Run a shell script, then dump out chosen environment variables. The build
+    system uses shell scripts to do some configuration that we need to
+    borrow. On Windows, the script itself must output the variable settings
+    (in the form "export FOO=<value>"), since otherwise there will be
+    problems with mismatched Windows/POSIX formats.
+    """
+    script_text = "source %s" % script
+    if platform.system() == "Windows":
+        parse_state = "parsing exports"
+    else:
+        script_text += "; echo VAR SETTINGS:; "
+        script_text += "; ".join("echo $" + var for var in vars)
+        parse_state = "scanning"
+    stdout = subprocess.check_output(["sh", "-x", "-c", script_text]).decode()
+    tograb = vars[:]
+    for line in stdout.splitlines():
+        if parse_state == "scanning":
+            if line == "VAR SETTINGS:":
+                parse_state = "grabbing"
+        elif parse_state == "grabbing":
+            var = tograb.pop(0)
+            env[var] = line
+        elif parse_state == "parsing exports":
+            m = re.match(r"export (\w+)=(.*)", line)
+            if m:
+                var, value = m.groups()
+                if var in tograb:
+                    env[var] = value
+                    info("Setting %s = %s" % (var, value))
+
+
+def ensure_dir_exists(
+    name, clobber=True, creation_marker_filename="CREATED-BY-AUTOSPIDER"
+):
+    if creation_marker_filename is None:
+        marker = None
+    else:
+        marker = os.path.join(name, creation_marker_filename)
+    if clobber:
+        if (
+            not AUTOMATION
+            and marker
+            and os.path.exists(name)
+            and not os.path.exists(marker)
+        ):
+            raise Exception(
+                "Refusing to delete objdir %s because it was not created by autospider"
+                % name
+            )
+        shutil.rmtree(name, ignore_errors=True)
+    try:
+        os.mkdir(name)
+        if marker:
+            open(marker, "a").close()
+    except OSError:
+        if clobber:
+            raise
+
+
+with open(os.path.join(DIR.scripts, "variants", args.variant)) as fh:
+    variant = json.load(fh)
+
+if args.variant == "nonunified":
+    # Rewrite js/src/**/moz.build to replace UNIFIED_SOURCES to SOURCES.
+    # Note that this modifies the current checkout.
+    for dirpath, dirnames, filenames in os.walk(DIR.js_src):
+        if "moz.build" in filenames:
+            in_place = ["-i"]
+            if platform.system() == "Darwin":
+                in_place.append("")
+            subprocess.check_call(
+                ["sed"]
+                + in_place
+                + ["s/UNIFIED_SOURCES/SOURCES/", os.path.join(dirpath, "moz.build")]
+            )
+
+CONFIGURE_ARGS = variant["configure-args"]
+
+opt = args.optimize
+if opt is None:
+    opt = variant.get("optimize")
+if opt is not None:
+    CONFIGURE_ARGS += " --enable-optimize" if opt else " --disable-optimize"
+
+opt = args.debug
+if opt is None:
+    opt = variant.get("debug")
+if opt is not None:
+    CONFIGURE_ARGS += " --enable-debug" if opt else " --disable-debug"
+
+opt = args.jemalloc
+if opt is not None:
+    CONFIGURE_ARGS += " --enable-jemalloc" if opt else " --disable-jemalloc"
+
+# Some of the variants request a particular word size (eg ARM simulators).
+word_bits = variant.get("bits")
+
+# On Linux and Windows, we build 32- and 64-bit versions on a 64 bit
+# host, so the caller has to specify what is desired.
+if word_bits is None and args.platform:
+    platform_arch = args.platform.split("-")[0]
+    if platform_arch in ("win32", "linux"):
+        word_bits = 32
+    elif platform_arch in ("win64", "linux64"):
+        word_bits = 64
+
+# Fall back to the word size of the host.
+if word_bits is None:
+    word_bits = 64 if platform.architecture()[0] == "64bit" else 32
+
+if "compiler" in variant:
+    compiler = variant["compiler"]
+elif platform.system() == "Windows":
+    compiler = "clang-cl"
+else:
+    compiler = "clang"
+
+# Need a platform name to use as a key in variant files.
+if args.platform:
+    variant_platform = args.platform.split("-")[0]
+elif platform.system() == "Windows":
+    variant_platform = "win64" if word_bits == 64 else "win32"
+elif platform.system() == "Linux":
+    variant_platform = "linux64" if word_bits == 64 else "linux"
+elif platform.system() == "Darwin":
+    variant_platform = "macosx64"
+else:
+    variant_platform = "other"
+
+
+info("using compiler '{}'".format(compiler))
+
+cxx = {"clang": "clang++", "gcc": "g++", "cl": "cl", "clang-cl": "clang-cl"}.get(
+    compiler
+)
+
+compiler_dir = env.get("GCCDIR", os.path.join(DIR.fetches, compiler))
+info("looking for compiler under {}/".format(compiler_dir))
+compiler_libdir = None
+if os.path.exists(os.path.join(compiler_dir, "bin", compiler)):
+    env.setdefault("CC", os.path.join(compiler_dir, "bin", compiler))
+    env.setdefault("CXX", os.path.join(compiler_dir, "bin", cxx))
+    if compiler == "clang":
+        platlib = "lib"
+    else:
+        platlib = "lib64" if word_bits == 64 else "lib"
+    compiler_libdir = os.path.join(compiler_dir, platlib)
+else:
+    env.setdefault("CC", compiler)
+    env.setdefault("CXX", cxx)
+
+bindir = os.path.join(OBJDIR, "dist", "bin")
+env["LD_LIBRARY_PATH"] = ":".join(
+    p for p in (bindir, compiler_libdir, env.get("LD_LIBRARY_PATH")) if p
+)
+
+for v in ("CC", "CXX", "LD_LIBRARY_PATH"):
+    info("default {name} = {value}".format(name=v, value=env[v]))
+
+rust_dir = os.path.join(DIR.fetches, "rustc")
+if os.path.exists(os.path.join(rust_dir, "bin", "rustc")):
+    env.setdefault("RUSTC", os.path.join(rust_dir, "bin", "rustc"))
+    env.setdefault("CARGO", os.path.join(rust_dir, "bin", "cargo"))
+else:
+    env.setdefault("RUSTC", "rustc")
+    env.setdefault("CARGO", "cargo")
+
+if platform.system() == "Darwin":
+    os.environ["SOURCE"] = DIR.source
+    set_vars_from_script(os.path.join(DIR.scripts, "macbuildenv.sh"), ["CC", "CXX"])
+elif platform.system() == "Windows":
+    MAKE = env.get("MAKE", "mozmake")
+    os.environ["SOURCE"] = DIR.source
+    if word_bits == 64:
+        os.environ["USE_64BIT"] = "1"
+    set_vars_from_script(
+        posixpath.join(PDIR.scripts, "winbuildenv.sh"),
+        ["PATH", "VC_PATH", "DIA_SDK_PATH", "CC", "CXX", "WINDOWSSDKDIR"],
+    )
+
+# Configure flags, based on word length and cross-compilation
+if word_bits == 32:
+    if platform.system() == "Windows":
+        CONFIGURE_ARGS += " --target=i686-pc-mingw32"
+    elif platform.system() == "Linux":
+        if not platform.machine().startswith("arm"):
+            CONFIGURE_ARGS += " --target=i686-pc-linux"
+
+    # Add SSE2 support for x86/x64 architectures.
+    if not platform.machine().startswith("arm"):
+        if platform.system() == "Windows":
+            sse_flags = "-arch:SSE2"
+        else:
+            sse_flags = "-msse -msse2 -mfpmath=sse"
+        env["CCFLAGS"] = "{0} {1}".format(env.get("CCFLAGS", ""), sse_flags)
+        env["CXXFLAGS"] = "{0} {1}".format(env.get("CXXFLAGS", ""), sse_flags)
+else:
+    if platform.system() == "Windows":
+        CONFIGURE_ARGS += " --target=x86_64-pc-mingw32"
+
+if platform.system() == "Linux" and AUTOMATION:
+    CONFIGURE_ARGS = "--enable-stdcxx-compat --disable-gold " + CONFIGURE_ARGS
+
+# Override environment variant settings conditionally.
+CONFIGURE_ARGS = "{} {}".format(
+    variant.get("conditional-configure-args", {}).get(variant_platform, ""),
+    CONFIGURE_ARGS,
+)
+
+# Timeouts.
+ACTIVE_PROCESSES = set()
+
+
+def killall():
+    for proc in ACTIVE_PROCESSES:
+        proc.kill()
+    ACTIVE_PROCESSES.clear()
+
+
+timer = Timer(args.timeout, killall)
+timer.daemon = True
+timer.start()
+
+ensure_dir_exists(OBJDIR, clobber=not args.dep and not args.nobuild)
+ensure_dir_exists(OUTDIR, clobber=not args.keep)
+
+# Any jobs that wish to produce additional output can save them into the upload
+# directory if there is such a thing, falling back to OBJDIR.
+env.setdefault("MOZ_UPLOAD_DIR", OBJDIR)
+ensure_dir_exists(env["MOZ_UPLOAD_DIR"], clobber=False, creation_marker_filename=None)
+info("MOZ_UPLOAD_DIR = {}".format(env["MOZ_UPLOAD_DIR"]))
+
+
+def run_command(command, check=False, **kwargs):
+    kwargs.setdefault("cwd", OBJDIR)
+    info("in directory {}, running {}".format(kwargs["cwd"], command))
+    proc = Popen(command, **kwargs)
+    ACTIVE_PROCESSES.add(proc)
+    stdout, stderr = None, None
+    try:
+        stdout, stderr = proc.communicate()
+    finally:
+        ACTIVE_PROCESSES.discard(proc)
+    status = proc.wait()
+    if check and status != 0:
+        raise subprocess.CalledProcessError(status, command, output=stderr)
+    return stdout, stderr, status
+
+
+# Replacement strings in environment variables.
+REPLACEMENTS = {
+    "DIR": DIR.scripts,
+    "TOOLTOOL_CHECKOUT": DIR.tooltool,
+    "MOZ_FETCHES_DIR": DIR.fetches,
+    "MOZ_UPLOAD_DIR": env["MOZ_UPLOAD_DIR"],
+    "OUTDIR": OUTDIR,
+}
+
+# Add in environment variable settings for this variant. Normally used to
+# modify the flags passed to the shell or to set the GC zeal mode.
+for k, v in variant.get("env", {}).items():
+    env[k] = v.format(**REPLACEMENTS)
+
+if AUTOMATION:
+    # Currently only supported on linux64.
+    if platform.system() == "Linux" and platform.machine() == "x86_64":
+        use_minidump = variant.get("use_minidump", True)
+    else:
+        use_minidump = False
+else:
+    use_minidump = False
+
+if use_minidump:
+    env.setdefault("MINIDUMP_SAVE_PATH", env["MOZ_UPLOAD_DIR"])
+    env.setdefault("DUMP_SYMS", os.path.join(DIR.fetches, "dump_syms", "dump_syms"))
+    injector_lib = None
+    if platform.system() == "Linux":
+        injector_lib = os.path.join(
+            DIR.tooltool, "breakpad-tools", "libbreakpadinjector.so"
+        )
+        env.setdefault(
+            "MINIDUMP_STACKWALK",
+            os.path.join(DIR.tooltool, "breakpad-tools", "minidump_stackwalk"),
+        )
+    elif platform.system() == "Darwin":
+        injector_lib = os.path.join(
+            DIR.tooltool, "breakpad-tools", "breakpadinjector.dylib"
+        )
+    if not injector_lib or not os.path.exists(injector_lib):
+        use_minidump = False
+
+    info("use_minidump is {}".format(use_minidump))
+    info("  MINIDUMP_SAVE_PATH={}".format(env["MINIDUMP_SAVE_PATH"]))
+    info("  injector lib is {}".format(injector_lib))
+    info("  MINIDUMP_STACKWALK={}".format(env.get("MINIDUMP_STACKWALK")))
+
+
+def need_updating_configure(configure):
+    if not os.path.exists(configure):
+        return True
+
+    dep_files = [
+        os.path.join(DIR.js_src, "configure.in"),
+        os.path.join(DIR.js_src, "old-configure.in"),
+    ]
+    for file in dep_files:
+        if os.path.getmtime(file) > os.path.getmtime(configure):
+            return True
+
+    return False
+
+
+if not args.nobuild:
+    CONFIGURE_ARGS += " --enable-nspr-build"
+    CONFIGURE_ARGS += " --prefix={OBJDIR}/dist".format(OBJDIR=POBJDIR)
+
+    # Generate a configure script from configure.in.
+    configure = os.path.join(DIR.js_src, "configure")
+    if need_updating_configure(configure):
+        shutil.copyfile(configure + ".in", configure)
+        os.chmod(configure, 0o755)
+
+    # Run configure
+    if not args.noconf:
+        run_command(
+            [
+                "sh",
+                "-c",
+                posixpath.join(PDIR.js_src, "configure") + " " + CONFIGURE_ARGS,
+            ],
+            check=True,
+        )
+
+    # Run make
+    run_command("%s -w %s" % (MAKE, MAKEFLAGS), shell=True, check=True)
+
+    if use_minidump:
+        # Convert symbols to breakpad format.
+        run_command(
+            [
+                "make",
+                "recurse_syms",
+                "MOZ_SOURCE_REPO=file://" + DIR.source,
+                "RUSTC_COMMIT=0",
+                "MOZ_CRASHREPORTER=1",
+                "MOZ_AUTOMATION_BUILD_SYMBOLS=1",
+            ],
+            check=True,
+        )
+
+COMMAND_PREFIX = []
+# On Linux, disable ASLR to make shell builds a bit more reproducible.
+if subprocess.call("type setarch >/dev/null 2>&1", shell=True) == 0:
+    COMMAND_PREFIX.extend(["setarch", platform.machine(), "-R"])
+
+
+def run_test_command(command, **kwargs):
+    _, _, status = run_command(COMMAND_PREFIX + command, check=False, **kwargs)
+    return status
+
+
+default_test_suites = frozenset(["jstests", "jittest", "jsapitests", "checks"])
+nondefault_test_suites = frozenset(["gdb"])
+all_test_suites = default_test_suites | nondefault_test_suites
+
+test_suites = set(default_test_suites)
+
+
+def normalize_tests(tests):
+    if "all" in tests:
+        return default_test_suites
+    return tests
+
+
+# Override environment variant settings conditionally.
+for k, v in variant.get("conditional-env", {}).get(variant_platform, {}).items():
+    env[k] = v.format(**REPLACEMENTS)
+
+# Skip any tests that are not run on this platform (or the 'all' platform).
+test_suites -= set(
+    normalize_tests(variant.get("skip-tests", {}).get(variant_platform, []))
+)
+test_suites -= set(normalize_tests(variant.get("skip-tests", {}).get("all", [])))
+
+# Add in additional tests for this platform (or the 'all' platform).
+test_suites |= set(
+    normalize_tests(variant.get("extra-tests", {}).get(variant_platform, []))
+)
+test_suites |= set(normalize_tests(variant.get("extra-tests", {}).get("all", [])))
+
+# Now adjust the variant's default test list with command-line arguments.
+test_suites |= set(normalize_tests(args.run_tests.split(",")))
+test_suites -= set(normalize_tests(args.skip_tests.split(",")))
+if "all" in args.skip_tests.split(","):
+    test_suites = []
+
+# Bug 1391877 - Windows test runs are getting mysterious timeouts when run
+# through taskcluster, but only when running multiple jit-test jobs in
+# parallel. Work around them for now.
+if platform.system() == "Windows":
+    env["JITTEST_EXTRA_ARGS"] = "-j1 " + env.get("JITTEST_EXTRA_ARGS", "")
+
+# Bug 1557130 - Atomics tests can create many additional threads which can
+# lead to resource exhaustion, resulting in intermittent failures. This was
+# only seen on beefy machines (> 32 cores), so limit the number of parallel
+# workers for now.
+if platform.system() == "Windows":
+    worker_count = min(multiprocessing.cpu_count(), 16)
+    env["JSTESTS_EXTRA_ARGS"] = "-j{} ".format(worker_count) + env.get(
+        "JSTESTS_EXTRA_ARGS", ""
+    )
+
+if use_minidump:
+    # Set up later js invocations to run with the breakpad injector loaded.
+    # Originally, I intended for this to be used with LD_PRELOAD, but when
+    # cross-compiling from 64- to 32-bit, that will fail and produce stderr
+    # output when running any 64-bit commands, which breaks eg mozconfig
+    # processing. So use the --dll command line mechanism universally.
+    for v in ("JSTESTS_EXTRA_ARGS", "JITTEST_EXTRA_ARGS"):
+        env[v] = "--args='--dll %s' %s" % (injector_lib, env.get(v, ""))
+
+# Always run all enabled tests, even if earlier ones failed. But return the
+# first failed status.
+results = [("(make-nonempty)", 0)]
+
+if "checks" in test_suites:
+    results.append(("make check", run_test_command([MAKE, "check"])))
+
+if "jittest" in test_suites:
+    results.append(("make check-jit-test", run_test_command([MAKE, "check-jit-test"])))
+if "jsapitests" in test_suites:
+    jsapi_test_binary = os.path.join(OBJDIR, "dist", "bin", "jsapi-tests")
+    test_env = env.copy()
+    test_env["TOPSRCDIR"] = DIR.source
+    if use_minidump and platform.system() == "Linux":
+        test_env["LD_PRELOAD"] = injector_lib
+    st = run_test_command([jsapi_test_binary], env=test_env)
+    if st < 0:
+        print("PROCESS-CRASH | jsapi-tests | application crashed")
+        print("Return code: {}".format(st))
+    results.append(("jsapi-tests", st))
+if "jstests" in test_suites:
+    results.append(("jstests", run_test_command([MAKE, "check-jstests"])))
+if "gdb" in test_suites:
+    test_script = os.path.join(DIR.js_src, "gdb", "run-tests.py")
+    auto_args = ["-s", "-o", "--no-progress"] if AUTOMATION else []
+    extra_args = env.get("GDBTEST_EXTRA_ARGS", "").split(" ")
+    results.append(
+        (
+            "gdb",
+            run_test_command([PYTHON, test_script, *auto_args, *extra_args, OBJDIR]),
+        )
+    )
+
+# FIXME bug 1291449: This would be unnecessary if we could run msan with -mllvm
+# -msan-keep-going, but in clang 3.8 it causes a hang during compilation.
+if variant.get("ignore-test-failures"):
+    logging.warning("Ignoring test results %s" % (results,))
+    results = [("ignored", 0)]
+
+if args.variant == "msan":
+    files = filter(lambda f: f.startswith("sanitize_log."), os.listdir(OUTDIR))
+    fullfiles = [os.path.join(OUTDIR, f) for f in files]
+
+    # Summarize results
+    sites = Counter()
+    errors = Counter()
+    for filename in fullfiles:
+        with open(os.path.join(OUTDIR, filename), "rb") as fh:
+            for line in fh:
+                m = re.match(
+                    r"^SUMMARY: \w+Sanitizer: (?:data race|use-of-uninitialized-value) (.*)",  # NOQA: E501
+                    line.strip(),
+                )
+                if m:
+                    # Some reports include file:line:column, some just
+                    # file:line. Just in case it's nondeterministic, we will
+                    # canonicalize to just the line number.
+                    site = re.sub(r"^(\S+?:\d+)(:\d+)* ", r"\1 ", m.group(1))
+                    sites[site] += 1
+
+    # Write a summary file and display it to stdout.
+    summary_filename = os.path.join(
+        env["MOZ_UPLOAD_DIR"], "%s_summary.txt" % args.variant
+    )
+    with open(summary_filename, "wb") as outfh:
+        for location, count in sites.most_common():
+            print >> outfh, "%d %s" % (count, location)
+    print(open(summary_filename, "rb").read())
+
+    if "max-errors" in variant:
+        max_allowed = variant["max-errors"]
+        print("Found %d errors out of %d allowed" % (len(sites), max_allowed))
+        if len(sites) > max_allowed:
+            results.append(("too many msan errors", 1))
+
+    # Gather individual results into a tarball. Note that these are
+    # distinguished only by pid of the JS process running within each test, so
+    # given the 16-bit limitation of pids, it's totally possible that some of
+    # these files will be lost due to being overwritten.
+    command = [
+        "tar",
+        "-C",
+        OUTDIR,
+        "-zcf",
+        os.path.join(env["MOZ_UPLOAD_DIR"], "%s.tar.gz" % args.variant),
+    ]
+    command += files
+    subprocess.call(command)
+
+# Generate stacks from minidumps.
+if use_minidump:
+    venv_python = os.path.join(OBJDIR, "_virtualenvs", "init_py3", "bin", "python3")
+    run_command(
+        [
+            venv_python,
+            os.path.join(DIR.source, "testing/mozbase/mozcrash/mozcrash/mozcrash.py"),
+            os.getenv("TMPDIR", "/tmp"),
+            os.path.join(OBJDIR, "dist/crashreporter-symbols"),
+        ]
+    )
+
+for name, st in results:
+    print("exit status %d for '%s'" % (st, name))
+
+sys.exit(max((st for _, st in results), key=abs))
diff --git a/js/src/devtools/automation/cgc-jittest-timeouts.txt b/js/src/devtools/automation/cgc-jittest-timeouts.txt
new file mode 100644
index 0000000000..fb9a806ddb
--- /dev/null
+++ b/js/src/devtools/automation/cgc-jittest-timeouts.txt
@@ -0,0 +1,55 @@
+asm.js/testBug1117235.js
+asm.js/testParallelCompile.js
+auto-regress/bug653395.js
+auto-regress/bug654392.js
+auto-regress/bug675251.js
+auto-regress/bug729797.js
+baseline/bug847446.js
+baseline/bug852175.js
+basic/bug1610192.js
+basic/bug632964-regexp.js
+basic/bug656261.js
+basic/bug677957-2.js
+basic/bug753283.js
+basic/bug867946.js
+basic/destructuring-iterator.js
+basic/offThreadCompileScript-01.js
+basic/testAtomize.js
+basic/testBug614653.js
+basic/testBug686274.js
+basic/testManyVars.js
+basic/testTypedArrayInit.js
+debug/DebuggeeWouldRun-01.js
+debug/DebuggeeWouldRun-02.js
+gc/bug-1014972.js
+gc/bug-1246593.js
+gc/bug-906236.js
+gc/bug-906241.js
+ion/bug1197769.js
+ion/bug779245.js
+ion/bug787921.js
+ion/bug977966.js
+ion/close-iterators-1.js
+parallel/alloc-many-objs.js
+parallel/alloc-too-many-objs.js
+parser/bug-1263881-1.js
+parser/bug-1263881-2.js
+parser/bug-1263881-3.js
+parser/bug-1355046.js
+parser/modifier-yield-without-operand-2.js
+saved-stacks/bug-1006876-too-much-recursion.js
+self-test/assertDeepEq.js
+sunspider/check-string-unpack-code.js
+TypedObject/jit-read-u16-from-struct-array-in-struct.js
+TypedObject/jit-read-u32-from-struct-array-in-struct.js
+v8-v5/check-earley-boyer.js
+v8-v5/check-raytrace.js
+v8-v5/check-regexp.js
+v8-v5/check-splay.js
+wasm/spec/br_table.wast.js
+wasm/spec/f32.wast.js
+wasm/spec/f32_cmp.wast.js
+wasm/spec/f64.wast.js
+wasm/spec/f64_cmp.wast.js
+wasm/spec/float_exprs.wast.js
+xdr/decode-off-thread.js
diff --git a/js/src/devtools/automation/cgc-jstests-slow.txt b/js/src/devtools/automation/cgc-jstests-slow.txt
new file mode 100644
index 0000000000..16290cb047
--- /dev/null
+++ b/js/src/devtools/automation/cgc-jstests-slow.txt
@@ -0,0 +1,65 @@
+non262/object/15.2.3.6-dictionary-redefinition-01-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-02-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-03-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-04-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-05-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-06-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-07-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-08-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-09-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-10-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-11-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-12-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-13-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-14-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-15-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-16-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-17-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-18-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-19-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-20-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-21-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-22-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-23-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-24-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-25-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-26-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-27-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-28-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-29-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-30-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-31-of-32.js
+non262/object/15.2.3.6-dictionary-redefinition-32-of-32.js
+non262/object/15.2.3.6-middle-redefinition-1-of-8.js
+non262/object/15.2.3.6-middle-redefinition-2-of-8.js
+non262/object/15.2.3.6-middle-redefinition-3-of-8.js
+non262/object/15.2.3.6-middle-redefinition-4-of-8.js
+non262/object/15.2.3.6-middle-redefinition-5-of-8.js
+non262/object/15.2.3.6-middle-redefinition-6-of-8.js
+non262/object/15.2.3.6-middle-redefinition-7-of-8.js
+non262/object/15.2.3.6-middle-redefinition-8-of-8.js
+non262/object/15.2.3.6-redefinition-1-of-4.js
+non262/object/15.2.3.6-redefinition-2-of-4.js
+non262/object/15.2.3.6-redefinition-3-of-4.js
+non262/object/15.2.3.6-redefinition-4-of-4.js
+non262/extensions/array-isArray-proxy-recursion.js
+non262/String/normalize-generateddata-part0.js
+non262/String/normalize-generateddata-part1-not-listed.js
+non262/String/normalize-generateddata-part1.js
+non262/String/normalize-generateddata-part2.js
+non262/String/normalize-generateddata-part3.js
+non262/GC/regress-203278-2.js
+non262/GC/regress-203278-3.js
+non262/GC/regress-278725.js
+non262/regress/regress-312588.js
+non262/regress/regress-321971.js
+non262/regress/regress-360969-01.js
+non262/regress/regress-360969-02.js
+non262/regress/regress-360969-03.js
+non262/regress/regress-360969-04.js
+non262/regress/regress-360969-05.js
+non262/regress/regress-360969-06.js
+non262/extensions/regress-477187.js
+non262/regress/regress-452498-052-a.js
+non262/extensions/clone-complex-object.js
+non262/extensions/clone-object-deep.js
diff --git a/js/src/devtools/automation/macbuildenv.sh b/js/src/devtools/automation/macbuildenv.sh
new file mode 100644
index 0000000000..df0f57fdba
--- /dev/null
+++ b/js/src/devtools/automation/macbuildenv.sh
@@ -0,0 +1,14 @@
+# We will be sourcing mozconfig files, which end up calling mk_add_options and
+# ac_add_options with various settings. We only need the variable settings they
+# create along the way.
+mk_add_options() {
+  : do nothing
+}
+ac_add_options() {
+  : do nothing
+}
+
+topsrcdir="$SOURCE"
+
+# Setup CC and CXX variables
+. $topsrcdir/build/macosx/mozconfig.common
diff --git a/js/src/devtools/automation/smoosh-jstests-slow.txt b/js/src/devtools/automation/smoosh-jstests-slow.txt
new file mode 100644
index 0000000000..4ab6f566b4
--- /dev/null
+++ b/js/src/devtools/automation/smoosh-jstests-slow.txt
@@ -0,0 +1,6 @@
+non262/String/normalize-generateddata-part0.js
+non262/String/normalize-generateddata-part1-not-listed.js
+non262/String/normalize-generateddata-part1.js
+non262/String/normalize-generateddata-part2.js
+non262/String/normalize-generateddata-part3.js
+non262/regress/regress-155081-2.js
diff --git a/js/src/devtools/automation/tsan-slow.txt b/js/src/devtools/automation/tsan-slow.txt
new file mode 100644
index 0000000000..3c50495ca5
--- /dev/null
+++ b/js/src/devtools/automation/tsan-slow.txt
@@ -0,0 +1,22 @@
+# Skip tests that run too slowly under tsan.
+basic/spread-call-maxarg.js
+basic/spread-call-near-maxarg.js
+arrays/too-long-array-splice.js
+# Skip tests that use too much memory under tsan - see bug 1519263.
+bug1355573.js
+max-string-length.js
+expr-decompiler-bug1475953.js
+regress-303213.js
+f32.wast.js
+f64.wast.js
+f32_cmp.wast.js
+f64_cmp.wast.js
+bug1470732.js
+bug1238815.js
+bug1315943.js
+bug-1382431.js
+float_exprs.wast.js
+bug858586.js
+bug1296667.js
+bug-1465695.js
+integer.js
diff --git a/js/src/devtools/automation/variants/arm-sim b/js/src/devtools/automation/variants/arm-sim
new file mode 100644
index 0000000000..ac932277c8
--- /dev/null
+++ b/js/src/devtools/automation/variants/arm-sim
@@ -0,0 +1,7 @@
+{
+    "configure-args": "--enable-simulator=arm --target=i686-pc-linux --enable-rust-simd",
+    "optimize": true,
+    "debug": true,
+    "bits": 32,
+    "use_minidump": false
+}
diff --git a/js/src/devtools/automation/variants/arm-sim-osx b/js/src/devtools/automation/variants/arm-sim-osx
new file mode 100644
index 0000000000..4e03dadd9f
--- /dev/null
+++ b/js/src/devtools/automation/variants/arm-sim-osx
@@ -0,0 +1,6 @@
+{
+    "configure-args": "--enable-simulator=arm --target=i686-apple-darwin10.0.0 --enable-rust-simd",
+    "optimize": true,
+    "debug": true,
+    "bits": 32
+}
diff --git a/js/src/devtools/automation/variants/arm64-cranelift-sim b/js/src/devtools/automation/variants/arm64-cranelift-sim
new file mode 100644
index 0000000000..9d81e7ad8e
--- /dev/null
+++ b/js/src/devtools/automation/variants/arm64-cranelift-sim
@@ -0,0 +1,10 @@
+{
+    "configure-args": "--enable-simulator=arm64 --enable-rust-simd",
+    "optimize": true,
+    "debug": true,
+    "env": {
+        "JSTESTS_EXTRA_ARGS": "--exclude-file={DIR}/arm64-jstests-slow.txt",
+        "JITTEST_EXTRA_ARGS": "--ignore-timeouts={DIR}/arm64-jittests-timeouts.txt --args=--wasm-compiler=cranelift"
+    },
+    "bits": 64
+}
diff --git a/js/src/devtools/automation/variants/arm64-sim b/js/src/devtools/automation/variants/arm64-sim
new file mode 100644
index 0000000000..bbaec58fac
--- /dev/null
+++ b/js/src/devtools/automation/variants/arm64-sim
@@ -0,0 +1,10 @@
+{
+    "configure-args": "--enable-simulator=arm64 --enable-rust-simd",
+    "optimize": true,
+    "debug": true,
+    "env": {
+        "JSTESTS_EXTRA_ARGS": "--exclude-file={DIR}/arm64-jstests-slow.txt",
+        "JITTEST_EXTRA_ARGS": "--ignore-timeouts={DIR}/arm64-jittests-timeouts.txt --jitflags=none --args=--baseline-eager -x ion/ -x asm.js/"
+    },
+    "bits": 64
+}
diff --git a/js/src/devtools/automation/variants/asan b/js/src/devtools/automation/variants/asan
new file mode 100644
index 0000000000..f31c88b9a0
--- /dev/null
+++ b/js/src/devtools/automation/variants/asan
@@ -0,0 +1,10 @@
+{
+    "configure-args": "--enable-debug-symbols='-gline-tables-only' --enable-gczeal --disable-jemalloc --enable-address-sanitizer --enable-rust-simd",
+    "optimize": true,
+    "debug": false,
+    "compiler": "clang",
+    "env": {
+        "LLVM_SYMBOLIZER": "{MOZ_FETCHES_DIR}/llvm-symbolizer/llvm-symbolizer"
+    },
+    "use_minidump": false
+}
diff --git a/js/src/devtools/automation/variants/compacting b/js/src/devtools/automation/variants/compacting
new file mode 100644
index 0000000000..911cfa1c49
--- /dev/null
+++ b/js/src/devtools/automation/variants/compacting
@@ -0,0 +1,14 @@
+{
+    "configure-args": "--enable-ctypes --enable-rust-simd",
+    "optimize": true,
+    "debug": true,
+    "env": {
+        "JS_GC_ZEAL": "IncrementalMultipleSlices",
+        "JITTEST_EXTRA_ARGS": "--jitflags=debug --ignore-timeouts={DIR}/cgc-jittest-timeouts.txt",
+        "JSTESTS_EXTRA_ARGS": "--exclude-file={DIR}/cgc-jstests-slow.txt"
+    },
+    "skip-tests": {
+        "win32": ["jstests"],
+        "win64": ["jstests"]
+    }
+}
diff --git a/js/src/devtools/automation/variants/dtrace b/js/src/devtools/automation/variants/dtrace
new file mode 100644
index 0000000000..0678819225
--- /dev/null
+++ b/js/src/devtools/automation/variants/dtrace
@@ -0,0 +1,5 @@
+{
+    "configure-args": "--enable-dtrace --enable-debug-symbols --enable-rust-simd",
+    "optimize": true,
+    "debug": true,
+}
diff --git a/js/src/devtools/automation/variants/fuzzing b/js/src/devtools/automation/variants/fuzzing
new file mode 100644
index 0000000000..7e4db4b5a2
--- /dev/null
+++ b/js/src/devtools/automation/variants/fuzzing
@@ -0,0 +1,13 @@
+{
+    "configure-args": "--enable-fuzzing --enable-gczeal --enable-debug-symbols='-gline-tables-only -gdwarf-2' --disable-jemalloc --disable-stdcxx-compat --enable-address-sanitizer --enable-ctypes --enable-nspr-build --enable-rust-simd",
+    "optimize": true,
+    "debug": false,
+    "compiler": "clang",
+    "env": {
+        "JITTEST_EXTRA_ARGS": "--jitflags=none",
+        "JSTESTS_EXTRA_ARGS": "--jitflags=none",
+        "LLVM_SYMBOLIZER": "{MOZ_FETCHES_DIR}/llvm-symbolizer/llvm-symbolizer",
+        "ASAN_SYMBOLIZER_PATH": "{MOZ_FETCHES_DIR}/llvm-symbolizer/llvm-symbolizer"
+    },
+    "use_minidump": false
+}
diff --git a/js/src/devtools/automation/variants/gdb b/js/src/devtools/automation/variants/gdb
new file mode 100644
index 0000000000..d86d265680
--- /dev/null
+++ b/js/src/devtools/automation/variants/gdb
@@ -0,0 +1,16 @@
+{
+    "configure-args": "--enable-rust-simd",
+    "debug": true,
+    "optimize": false,
+    "compiler": "gcc",
+    "skip-tests": {
+        "all": ["jstests", "jittest", "jsapitests"]
+    },
+    "extra-tests": {
+        "all": ["gdb"]
+    },
+    "env": {
+        "GDBTEST_EXTRA_ARGS": "--exclude=unwind"
+    },
+    "use_minidump": false
+}
diff --git a/js/src/devtools/automation/variants/msan b/js/src/devtools/automation/variants/msan
new file mode 100644
index 0000000000..260998d9f5
--- /dev/null
+++ b/js/src/devtools/automation/variants/msan
@@ -0,0 +1,14 @@
+{
+    "configure-args": "--enable-debug-symbols='-gline-tables-only' --disable-jemalloc --enable-memory-sanitizer --without-system-zlib --enable-rust-simd",
+    "optimize": true,
+    "debug": false,
+    "compiler": "clang",
+    "env": {
+        "JITTEST_EXTRA_ARGS": "--jitflags=interp --ignore-timeouts={DIR}/cgc-jittest-timeouts.txt",
+        "JSTESTS_EXTRA_ARGS": "--jitflags=interp --exclude-file={DIR}/cgc-jstests-slow.txt",
+        "MSAN_OPTIONS": "external_symbolizer_path={MOZ_FETCHES_DIR}/clang/bin/llvm-symbolizer:log_path={OUTDIR}/sanitize_log"
+    },
+    "ignore-test-failures": "true",
+    "max-errors": 7,
+    "use_minidump": false
+}
diff --git a/js/src/devtools/automation/variants/nojit b/js/src/devtools/automation/variants/nojit
new file mode 100644
index 0000000000..9cebcfcd16
--- /dev/null
+++ b/js/src/devtools/automation/variants/nojit
@@ -0,0 +1,4 @@
+{
+    "configure-args": "--disable-jit --enable-warnings-as-errors --enable-rust-simd",
+    "optimize": true
+}
diff --git a/js/src/devtools/automation/variants/nonunified b/js/src/devtools/automation/variants/nonunified
new file mode 100644
index 0000000000..c1be74aeb9
--- /dev/null
+++ b/js/src/devtools/automation/variants/nonunified
@@ -0,0 +1,13 @@
+{
+    "configure-args": "--enable-warnings-as-errors --enable-rust-simd",
+    "debug": true,
+    "env": {
+        "JS_SMOOSH_DISABLE_OPCODE_CHECK": "1"
+    },
+    "conditional-configure-args": {
+        "linux64": "--enable-smoosh"
+    },
+    "skip-tests": {
+        "all": ["jstests", "jittest", "checks"]
+    }
+}
diff --git a/js/src/devtools/automation/variants/plain b/js/src/devtools/automation/variants/plain
new file mode 100644
index 0000000000..0c97a5d535
--- /dev/null
+++ b/js/src/devtools/automation/variants/plain
@@ -0,0 +1,8 @@
+{
+    "configure-args": "--enable-rust-simd",
+    "optimize": true,
+    "compiler": "gcc",
+    "env": {
+        "JSTESTS_EXTRA_ARGS": "--jitflags=jstests"
+    }
+}
diff --git a/js/src/devtools/automation/variants/plaindebug b/js/src/devtools/automation/variants/plaindebug
new file mode 100644
index 0000000000..0b6271c8c2
--- /dev/null
+++ b/js/src/devtools/automation/variants/plaindebug
@@ -0,0 +1,10 @@
+{
+    "configure-args": "--enable-rust-simd",
+    "debug": true,
+    "env": {
+        "JSTESTS_EXTRA_ARGS": "--jitflags=debug"
+    },
+    "conditional-configure-args": {
+        "linux64": "--enable-clang-plugin"
+    }
+}
diff --git a/js/src/devtools/automation/variants/rootanalysis b/js/src/devtools/automation/variants/rootanalysis
new file mode 100644
index 0000000000..7c0fb5242b
--- /dev/null
+++ b/js/src/devtools/automation/variants/rootanalysis
@@ -0,0 +1,9 @@
+{
+    "configure-args": "--enable-ctypes --enable-rust-simd",
+    "optimize": true,
+    "debug": true,
+    "env": {
+        "JS_GC_ZEAL": "GenerationalGC",
+        "JSTESTS_EXTRA_ARGS": "--jitflags=debug"
+    }
+}
diff --git a/js/src/devtools/automation/variants/smoosh b/js/src/devtools/automation/variants/smoosh
new file mode 100644
index 0000000000..d4a0618d16
--- /dev/null
+++ b/js/src/devtools/automation/variants/smoosh
@@ -0,0 +1,8 @@
+{
+    "configure-args": "--enable-rust-simd --enable-smoosh",
+    "optimize": true,
+    "env": {
+        "JSTESTS_EXTRA_ARGS": "--args='--smoosh' --jitflags=jstests",
+        "JITTEST_EXTRA_ARGS": "--args='--smoosh'"
+    }
+}
diff --git a/js/src/devtools/automation/variants/smooshdebug b/js/src/devtools/automation/variants/smooshdebug
new file mode 100644
index 0000000000..388153f895
--- /dev/null
+++ b/js/src/devtools/automation/variants/smooshdebug
@@ -0,0 +1,12 @@
+{
+    "configure-args": "--enable-rust-simd --enable-smoosh",
+    "debug": true,
+    "compiler": "clang",
+    "env": {
+        "JSTESTS_EXTRA_ARGS": "--args='--smoosh' --jitflags=debug --exclude-file={DIR}/smoosh-jstests-slow.txt",
+        "JITTEST_EXTRA_ARGS": "--args='--smoosh'"
+    },
+    "conditional-configure-args": {
+        "linux64": "--enable-clang-plugin"
+    }
+}
diff --git a/js/src/devtools/automation/variants/tsan b/js/src/devtools/automation/variants/tsan
new file mode 100644
index 0000000000..d07b1d64aa
--- /dev/null
+++ b/js/src/devtools/automation/variants/tsan
@@ -0,0 +1,12 @@
+{
+    "configure-args": "--enable-debug-symbols='-gline-tables-only' --disable-jemalloc --enable-thread-sanitizer --enable-rust-simd",
+    "optimize": true,
+    "debug": false,
+    "compiler": "clang",
+    "env": {
+        "LLVM_SYMBOLIZER": "{MOZ_FETCHES_DIR}/llvm-symbolizer/llvm-symbolizer",
+        "JITTEST_EXTRA_ARGS": "--jitflags=tsan --ignore-timeouts={DIR}/cgc-jittest-timeouts.txt --unusable-error-status --exclude-from={DIR}/tsan-slow.txt",
+        "JSTESTS_EXTRA_ARGS": "--exclude-file={DIR}/cgc-jstests-slow.txt"
+    },
+    "use_minidump": false
+}
diff --git a/js/src/devtools/automation/variants/warnaserr b/js/src/devtools/automation/variants/warnaserr
new file mode 100644
index 0000000000..98d5e96fe1
--- /dev/null
+++ b/js/src/devtools/automation/variants/warnaserr
@@ -0,0 +1,4 @@
+{
+    "configure-args": "--enable-warnings-as-errors --enable-rust-simd",
+    "optimize": true
+}
diff --git a/js/src/devtools/automation/variants/warnaserrdebug b/js/src/devtools/automation/variants/warnaserrdebug
new file mode 100644
index 0000000000..ca1f14fef1
--- /dev/null
+++ b/js/src/devtools/automation/variants/warnaserrdebug
@@ -0,0 +1,4 @@
+{
+    "configure-args": "--enable-warnings-as-errors",
+    "debug": true
+}
diff --git a/js/src/devtools/automation/winbuildenv.sh b/js/src/devtools/automation/winbuildenv.sh
new file mode 100644
index 0000000000..7fa10807df
--- /dev/null
+++ b/js/src/devtools/automation/winbuildenv.sh
@@ -0,0 +1,32 @@
+mk_export_correct_style() {
+  echo "export $1=$(cmd.exe //c echo %$1%)"
+}
+
+topsrcdir="$SOURCE"
+
+# Tooltool installs in parent of topsrcdir for spidermonkey builds.
+# Resolve that path since the mozconfigs assume tooltool installs in
+# topsrcdir.
+export VSPATH="$(cd ${topsrcdir}/.. && pwd)/vs2017_15.8.4"
+
+if [ -n "$USE_64BIT" ]; then
+  . $topsrcdir/build/win64/mozconfig.vs-latest
+else
+  . $topsrcdir/build/win32/mozconfig.vs-latest
+fi
+
+mk_export_correct_style CC
+mk_export_correct_style CXX
+mk_export_correct_style LINKER
+mk_export_correct_style WINDOWSSDKDIR
+mk_export_correct_style DIA_SDK_PATH
+mk_export_correct_style VC_PATH
+
+# PATH also needs to point to mozmake.exe, which can come from either
+# newer mozilla-build or tooltool.
+if ! which mozmake 2>/dev/null; then
+    export PATH="$PATH:$SOURCE/.."
+    if ! which mozmake 2>/dev/null; then
+  ( cd $SOURCE/..; $SOURCE/mach artifact toolchain -v --tooltool-manifest $SOURCE/browser/config/tooltool-manifests/${platform:-win32}/releng.manifest --retry 4${TOOLTOOL_CACHE:+ --cache-dir ${TOOLTOOL_CACHE}})
+    fi
+fi