10 files changed, 683 insertions, 0 deletions
diff --git a/build/build-clang/README b/build/build-clang/README
new file mode 100644
index 000000000..8e93eeaa6
--- /dev/null
+++ b/build/build-clang/README
@@ -0,0 +1,45 @@
+build-clang.py
+==============
+
+A script to build clang from source.
+
+```
+usage: build-clang.py [-h] -c CONFIG [--clean]
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -c CONFIG, --config CONFIG
+                        Clang configuration file
+  --clean               Clean the build directory
+```
+
+Pre-requisites
+--------------
+* Working build toolchain.
+* Subversion
+* CMake
+* Ninja
+* Python 2.7
+
+Please use the latest available CMake for your platform to avoid surprises.
+
+Config file format
+------------------
+
+build-clang.py accepts a JSON config format with the following fields:
+
+* llvm_revision: The LLVM SVN revision to build.
+* stages: Use 1, 2, or 3 to select different compiler stages.  The default is 3.
+* llvm_repo: SVN path to the LLVM repo.
+* clang_repo: SVN path to the Clang repo.
+* compiler_repo: SVN path to the compiler-rt repo.
+* libcxx_repo: SVN path to the libcxx repo.
+* libcxxabi_repo: SVN path to the libcxxabi repo.
+* python_path: Path to the Python 2.7 installation on the machine building clang.
+* gcc_dir: Path to the gcc toolchain installation, only required on Linux.
+* cc: Path to the bootsraping C Compiler.
+* cxx: Path to the bootsraping C++ Compiler.
+* patches: Optional list of patches to apply per platform.  Supported platforms: macosx64, linux32, linux64.  The default is Release.
+* build_type: The type of build to make.  Supported types: Release, Debug, RelWithDebInfo or MinSizeRel.
+* build_libcxx: Whether to build with libcxx.  The default is false.
+* assertions: Whether to enable LLVM assertions.  The default is false.
diff --git a/build/build-clang/build-clang.py b/build/build-clang/build-clang.py
new file mode 100755
index 000000000..697bbb9b8
--- /dev/null
+++ b/build/build-clang/build-clang.py
@@ -0,0 +1,425 @@
+#!/usr/bin/python2.7
+# 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 os
+import os.path
+import shutil
+import subprocess
+import platform
+import json
+import argparse
+import tempfile
+import glob
+import errno
+import re
+from contextlib import contextmanager
+import sys
+import which
+
+DEBUG = os.getenv("DEBUG")
+
+
+def symlink(source, link_name):
+    os_symlink = getattr(os, "symlink", None)
+    if callable(os_symlink):
+        os_symlink(source, link_name)
+    else:
+        if os.path.isdir(source):
+            # Fall back to copying the directory :(
+            copy_dir_contents(source, link_name)
+
+
+def check_run(args):
+    global DEBUG
+    if DEBUG:
+        print >> sys.stderr, ' '.join(args)
+    r = subprocess.call(args)
+    assert r == 0
+
+
+def run_in(path, args):
+    d = os.getcwd()
+    global DEBUG
+    if DEBUG:
+        print >> sys.stderr, 'cd "%s"' % path
+    os.chdir(path)
+    check_run(args)
+    if DEBUG:
+        print >> sys.stderr, 'cd "%s"' % d
+    os.chdir(d)
+
+
+def patch(patch, srcdir):
+    patch = os.path.realpath(patch)
+    check_run(['patch', '-d', srcdir, '-p1', '-i', patch, '--fuzz=0',
+               '-s'])
+
+
+def build_package(package_build_dir, run_cmake, cmake_args):
+    if not os.path.exists(package_build_dir):
+        os.mkdir(package_build_dir)
+    if run_cmake:
+        run_in(package_build_dir, ["cmake"] + cmake_args)
+    run_in(package_build_dir, ["ninja", "install"])
+
+
+@contextmanager
+def updated_env(env):
+    old_env = os.environ.copy()
+    os.environ.update(env)
+    yield
+    os.environ.clear()
+    os.environ.update(old_env)
+
+
+def build_tar_package(tar, name, base, directory):
+    name = os.path.realpath(name)
+    # On Windows, we have to convert this into an msys path so that tar can
+    # understand it.
+    if is_windows():
+        name = name.replace('\\', '/')
+        def f(match):
+            return '/' + match.group(1).lower()
+        name = re.sub(r'^([A-Z]):', f, name)
+    run_in(base, [tar,
+                  "-c",
+                  "-%s" % ("J" if ".xz" in name else "j"),
+                  "-f",
+                  name, directory])
+
+
+def copy_dir_contents(src, dest):
+    for f in glob.glob("%s/*" % src):
+        try:
+            destname = "%s/%s" % (dest, os.path.basename(f))
+            if os.path.isdir(f):
+                shutil.copytree(f, destname)
+            else:
+                shutil.copy2(f, destname)
+        except OSError as e:
+            if e.errno == errno.ENOTDIR:
+                shutil.copy2(f, destname)
+            elif e.errno == errno.EEXIST:
+                if os.path.isdir(f):
+                    copy_dir_contents(f, destname)
+                else:
+                    os.remove(destname)
+                    shutil.copy2(f, destname)
+            else:
+                raise Exception('Directory not copied. Error: %s' % e)
+
+
+def mkdir_p(path):
+    try:
+        os.makedirs(path)
+    except OSError as e:
+        if e.errno != errno.EEXIST or not os.path.isdir(path):
+            raise
+
+
+def install_libgcc(gcc_dir, clang_dir):
+    out = subprocess.check_output([os.path.join(gcc_dir, "bin", "gcc"),
+                                   '-print-libgcc-file-name'])
+
+    libgcc_dir = os.path.dirname(out.rstrip())
+    clang_lib_dir = os.path.join(clang_dir, "lib", "gcc",
+                                 "x86_64-unknown-linux-gnu",
+                                 os.path.basename(libgcc_dir))
+    mkdir_p(clang_lib_dir)
+    copy_dir_contents(libgcc_dir, clang_lib_dir)
+    libgcc_dir = os.path.join(gcc_dir, "lib64")
+    clang_lib_dir = os.path.join(clang_dir, "lib")
+    copy_dir_contents(libgcc_dir, clang_lib_dir)
+    include_dir = os.path.join(gcc_dir, "include")
+    clang_include_dir = os.path.join(clang_dir, "include")
+    copy_dir_contents(include_dir, clang_include_dir)
+
+
+def svn_co(source_dir, url, directory, revision):
+    run_in(source_dir, ["svn", "co", "-q", "-r", revision, url, directory])
+
+
+def svn_update(directory, revision):
+    run_in(directory, ["svn", "update", "-q", "-r", revision])
+
+
+def get_platform():
+    p = platform.system()
+    if p == "Darwin":
+        return "macosx64"
+    elif p == "Linux":
+        if platform.architecture() == "AMD64":
+            return "linux64"
+        else:
+            return "linux32"
+    elif p == "Windows":
+        if platform.architecture() == "AMD64":
+            return "win64"
+        else:
+            return "win32"
+    else:
+        raise NotImplementedError("Not supported platform")
+
+
+def is_darwin():
+    return platform.system() == "Darwin"
+
+
+def is_linux():
+    return platform.system() == "Linux"
+
+
+def is_windows():
+    return platform.system() == "Windows"
+
+
+def build_one_stage(cc, cxx, src_dir, stage_dir, build_libcxx,
+                    build_type, assertions, python_path, gcc_dir):
+    if not os.path.exists(stage_dir):
+        os.mkdir(stage_dir)
+
+    build_dir = stage_dir + "/build"
+    inst_dir = stage_dir + "/clang"
+
+    run_cmake = True
+    if os.path.exists(build_dir + "/build.ninja"):
+        run_cmake = False
+
+    # cmake doesn't deal well with backslashes in paths.
+    def slashify_path(path):
+        return path.replace('\\', '/')
+
+    cmake_args = ["-GNinja",
+                  "-DCMAKE_C_COMPILER=%s" % slashify_path(cc[0]),
+                  "-DCMAKE_CXX_COMPILER=%s" % slashify_path(cxx[0]),
+                  "-DCMAKE_ASM_COMPILER=%s" % slashify_path(cc[0]),
+                  "-DCMAKE_C_FLAGS=%s" % ' '.join(cc[1:]),
+                  "-DCMAKE_CXX_FLAGS=%s" % ' '.join(cxx[1:]),
+                  "-DCMAKE_BUILD_TYPE=%s" % build_type,
+                  "-DLLVM_TARGETS_TO_BUILD=X86;ARM",
+                  "-DLLVM_ENABLE_ASSERTIONS=%s" % ("ON" if assertions else "OFF"),
+                  "-DPYTHON_EXECUTABLE=%s" % slashify_path(python_path),
+                  "-DCMAKE_INSTALL_PREFIX=%s" % inst_dir,
+                  "-DLLVM_TOOL_LIBCXX_BUILD=%s" % ("ON" if build_libcxx else "OFF"),
+                  "-DLIBCXX_LIBCPPABI_VERSION=\"\"",
+                  src_dir];
+    build_package(build_dir, run_cmake, cmake_args)
+
+    if is_linux():
+        install_libgcc(gcc_dir, inst_dir)
+
+
+def get_compiler(config, key):
+    if key not in config:
+        raise ValueError("Config file needs to set %s" % key)
+
+    f = config[key]
+    if os.path.isabs(f):
+        if not os.path.exists(f):
+            raise ValueError("%s must point to an existing path" % key)
+        return f
+
+    # Assume that we have the name of some program that should be on PATH.
+    try:
+        return which.which(f)
+    except which.WhichError:
+        raise ValueError("%s not found on PATH" % f)
+
+if __name__ == "__main__":
+    # The directories end up in the debug info, so the easy way of getting
+    # a reproducible build is to run it in a know absolute directory.
+    # We use a directory in /builds/slave because the mozilla infrastructure
+    # cleans it up automatically.
+    base_dir = "/builds/slave/moz-toolchain"
+    if is_windows():
+        # TODO: Because Windows taskcluster builds are run with distinct
+        # user IDs for each job, we can't store things in some globally
+        # accessible directory: one job will run, checkout LLVM to that
+        # directory, and then if another job runs, the new user won't be
+        # able to access the previously-checked out code--or be able to
+        # delete it.  So on Windows, we build in the task-specific home
+        # directory; we will eventually add -fdebug-prefix-map options
+        # to the LLVM build to bring back reproducibility.
+        base_dir = os.path.join(os.getcwd(), 'llvm-sources')
+
+    source_dir = base_dir + "/src"
+    build_dir = base_dir + "/build"
+
+    llvm_source_dir = source_dir + "/llvm"
+    clang_source_dir = source_dir + "/clang"
+    compiler_rt_source_dir = source_dir + "/compiler-rt"
+    libcxx_source_dir = source_dir + "/libcxx"
+    libcxxabi_source_dir = source_dir + "/libcxxabi"
+
+    if is_darwin():
+        os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.7'
+
+    exe_ext = ""
+    if is_windows():
+        exe_ext = ".exe"
+
+    cc_name = "clang"
+    cxx_name = "clang++"
+    if is_windows():
+        cc_name = "clang-cl"
+        cxx_name = "clang-cl"
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-c', '--config', required=True,
+                        type=argparse.FileType('r'),
+                        help="Clang configuration file")
+    parser.add_argument('--clean', required=False,
+                        action='store_true',
+                        help="Clean the build directory")
+
+    args = parser.parse_args()
+    config = json.load(args.config)
+
+    if args.clean:
+        shutil.rmtree(build_dir)
+        os.sys.exit(0)
+
+    llvm_revision = config["llvm_revision"]
+    llvm_repo = config["llvm_repo"]
+    clang_repo = config["clang_repo"]
+    compiler_repo = config["compiler_repo"]
+    libcxx_repo = config["libcxx_repo"]
+    libcxxabi_repo = config.get("libcxxabi_repo")
+    stages = 3
+    if "stages" in config:
+        stages = int(config["stages"])
+        if stages not in (1, 2, 3):
+            raise ValueError("We only know how to build 1, 2, or 3 stages")
+    build_type = "Release"
+    if "build_type" in config:
+        build_type = config["build_type"]
+        if build_type not in ("Release", "Debug", "RelWithDebInfo", "MinSizeRel"):
+            raise ValueError("We only know how to do Release, Debug, RelWithDebInfo or MinSizeRel builds")
+    build_libcxx = False
+    if "build_libcxx" in config:
+        build_libcxx = config["build_libcxx"]
+        if build_libcxx not in (True, False):
+            raise ValueError("Only boolean values are accepted for build_libcxx.")
+    assertions = False
+    if "assertions" in config:
+        assertions = config["assertions"]
+        if assertions not in (True, False):
+            raise ValueError("Only boolean values are accepted for assertions.")
+    python_path = None
+    if "python_path" not in config:
+        raise ValueError("Config file needs to set python_path")
+    python_path = config["python_path"]
+    gcc_dir = None
+    if "gcc_dir" in config:
+        gcc_dir = config["gcc_dir"]
+        if not os.path.exists(gcc_dir):
+            raise ValueError("gcc_dir must point to an existing path")
+    if is_linux() and gcc_dir is None:
+        raise ValueError("Config file needs to set gcc_dir")
+    cc = get_compiler(config, "cc")
+    cxx = get_compiler(config, "cxx")
+
+    if not os.path.exists(source_dir):
+        os.makedirs(source_dir)
+        svn_co(source_dir, llvm_repo, llvm_source_dir, llvm_revision)
+        svn_co(source_dir, clang_repo, clang_source_dir, llvm_revision)
+        svn_co(source_dir, compiler_repo, compiler_rt_source_dir, llvm_revision)
+        svn_co(source_dir, libcxx_repo, libcxx_source_dir, llvm_revision)
+        if libcxxabi_repo:
+            svn_co(source_dir, libcxxabi_repo, libcxxabi_source_dir, llvm_revision)
+        for p in config.get("patches", {}).get(get_platform(), []):
+            patch(p, source_dir)
+    else:
+        svn_update(llvm_source_dir, llvm_revision)
+        svn_update(clang_source_dir, llvm_revision)
+        svn_update(compiler_rt_source_dir, llvm_revision)
+        svn_update(libcxx_source_dir, llvm_revision)
+        if libcxxabi_repo:
+            svn_update(libcxxabi_source_dir, llvm_revision)
+
+    symlinks = [(source_dir + "/clang",
+                 llvm_source_dir + "/tools/clang"),
+                (source_dir + "/compiler-rt",
+                 llvm_source_dir + "/projects/compiler-rt"),
+                (source_dir + "/libcxx",
+                 llvm_source_dir + "/projects/libcxx"),
+                (source_dir + "/libcxxabi",
+                 llvm_source_dir + "/projects/libcxxabi")]
+    for l in symlinks:
+        # On Windows, we have to re-copy the whole directory every time.
+        if not is_windows() and os.path.islink(l[1]):
+            continue
+        if os.path.isdir(l[1]):
+            shutil.rmtree(l[1])
+        elif os.path.exists(l[1]):
+            os.unlink(l[1])
+        if os.path.exists(l[0]):
+            symlink(l[0], l[1])
+
+    if not os.path.exists(build_dir):
+        os.makedirs(build_dir)
+
+    stage1_dir = build_dir + '/stage1'
+    stage1_inst_dir = stage1_dir + '/clang'
+
+    final_stage_dir = stage1_dir
+
+    if is_darwin():
+        extra_cflags = []
+        extra_cxxflags = ["-stdlib=libc++"]
+        extra_cflags2 = []
+        extra_cxxflags2 = ["-stdlib=libc++"]
+    elif is_linux():
+        extra_cflags = ["-static-libgcc"]
+        extra_cxxflags = ["-static-libgcc", "-static-libstdc++"]
+        extra_cflags2 = ["-fPIC"]
+        extra_cxxflags2 = ["-fPIC", "-static-libstdc++"]
+
+        if os.environ.has_key('LD_LIBRARY_PATH'):
+            os.environ['LD_LIBRARY_PATH'] = '%s/lib64/:%s' % (gcc_dir, os.environ['LD_LIBRARY_PATH']);
+        else:
+            os.environ['LD_LIBRARY_PATH'] = '%s/lib64/' % gcc_dir
+    elif is_windows():
+        extra_cflags = []
+        extra_cxxflags = []
+        # clang-cl would like to figure out what it's supposed to be emulating
+        # by looking at an MSVC install, but we don't really have that here.
+        # Force things on.
+        extra_cflags2 = []
+        extra_cxxflags2 = ['-fms-compatibility-version=19.00.24213', '-Xclang', '-std=c++14']
+
+    build_one_stage(
+        [cc] + extra_cflags,
+        [cxx] + extra_cxxflags,
+        llvm_source_dir, stage1_dir, build_libcxx,
+        build_type, assertions, python_path, gcc_dir)
+
+    if stages > 1:
+        stage2_dir = build_dir + '/stage2'
+        stage2_inst_dir = stage2_dir + '/clang'
+        final_stage_dir = stage2_dir
+        build_one_stage(
+            [stage1_inst_dir + "/bin/%s%s" %
+                (cc_name, exe_ext)] + extra_cflags2,
+            [stage1_inst_dir + "/bin/%s%s" %
+                (cxx_name, exe_ext)] + extra_cxxflags2,
+            llvm_source_dir, stage2_dir, build_libcxx,
+            build_type, assertions, python_path, gcc_dir)
+
+    if stages > 2:
+        stage3_dir = build_dir + '/stage3'
+        final_stage_dir = stage3_dir
+        build_one_stage(
+            [stage2_inst_dir + "/bin/%s%s" %
+                (cc_name, exe_ext)] + extra_cflags2,
+            [stage2_inst_dir + "/bin/%s%s" %
+                (cxx_name, exe_ext)] + extra_cxxflags2,
+            llvm_source_dir, stage3_dir, build_libcxx,
+            build_type, assertions, python_path, gcc_dir)
+
+    if is_darwin() or is_windows():
+        build_tar_package("tar", "clang.tar.bz2", final_stage_dir, "clang")
+    else:
+        build_tar_package("tar", "clang.tar.xz", final_stage_dir, "clang")
diff --git a/build/build-clang/clang-static-analysis-linux64.json b/build/build-clang/clang-static-analysis-linux64.json
new file mode 100644
index 000000000..d3ae6c8ad
--- /dev/null
+++ b/build/build-clang/clang-static-analysis-linux64.json
@@ -0,0 +1,30 @@
+{
+    "llvm_revision": "262557",
+    "stages": "3",
+    "build_libcxx": true,
+    "build_type": "Release",
+    "assertions": false,
+    "llvm_repo": "https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_380/final",
+    "clang_repo": "https://llvm.org/svn/llvm-project/cfe/tags/RELEASE_380/final",
+    "compiler_repo": "https://llvm.org/svn/llvm-project/compiler-rt/tags/RELEASE_380/final",
+    "libcxx_repo": "https://llvm.org/svn/llvm-project/libcxx/tags/RELEASE_380/final",
+    "libcxxabi_repo": "https://llvm.org/svn/llvm-project/libcxxabi/tags/RELEASE_380/final",
+    "python_path": "/usr/bin/python2.7",
+    "gcc_dir": "/home/worker/workspace/build/src/gcc",
+    "cc": "/home/worker/workspace/build/src/gcc/bin/gcc",
+    "cxx": "/home/worker/workspace/build/src/gcc/bin/g++",
+    "patches": {
+        "macosx64": [
+          "llvm-debug-frame.patch",
+          "return-empty-string-non-mangled.patch"
+        ],
+        "linux64": [
+          "llvm-debug-frame.patch",
+          "return-empty-string-non-mangled.patch"
+        ],
+        "linux32": [
+          "llvm-debug-frame.patch",
+          "return-empty-string-non-mangled.patch"
+        ]
+    }
+}
diff --git a/build/build-clang/clang-static-analysis-macosx64.json b/build/build-clang/clang-static-analysis-macosx64.json
new file mode 100644
index 000000000..16818825b
--- /dev/null
+++ b/build/build-clang/clang-static-analysis-macosx64.json
@@ -0,0 +1,29 @@
+{
+    "llvm_revision": "262557",
+    "stages": "3",
+    "build_libcxx": true,
+    "build_type": "Release",
+    "assertions": false,
+    "llvm_repo": "https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_380/final",
+    "clang_repo": "https://llvm.org/svn/llvm-project/cfe/tags/RELEASE_380/final",
+    "compiler_repo": "https://llvm.org/svn/llvm-project/compiler-rt/tags/RELEASE_380/final",
+    "libcxx_repo": "https://llvm.org/svn/llvm-project/libcxx/tags/RELEASE_380/final",
+    "python_path": "/usr/local/bin/python2.7",
+    "cc": "/Users/cltbld/clang/bin/clang",
+    "cxx": "/Users/cltbld/clang/bin/clang++",
+    "patches": {
+        "macosx64": [
+          "disable-mac-tsan.patch",
+          "llvm-debug-frame.patch",
+          "return-empty-string-non-mangled.patch"
+        ],
+        "linux64": [
+          "llvm-debug-frame.patch",
+          "return-empty-string-non-mangled.patch"
+        ],
+        "linux32": [
+          "llvm-debug-frame.patch",
+          "return-empty-string-non-mangled.patch"
+        ]
+    }
+}
diff --git a/build/build-clang/clang-static-analysis-win32.json b/build/build-clang/clang-static-analysis-win32.json
new file mode 100644
index 000000000..01cddad85
--- /dev/null
+++ b/build/build-clang/clang-static-analysis-win32.json
@@ -0,0 +1,16 @@
+{
+    "llvm_revision": "283955",
+    "stages": "3",
+    "build_libcxx": false,
+    "build_type": "Release",
+    "assertions": false,
+    "llvm_repo": "https://llvm.org/svn/llvm-project/llvm/trunk",
+    "clang_repo": "https://llvm.org/svn/llvm-project/cfe/trunk",
+    "compiler_repo": "https://llvm.org/svn/llvm-project/compiler-rt/trunk",
+    "libcxx_repo": "https://llvm.org/svn/llvm-project/libcxx/trunk",
+    "python_path": "c:/mozilla-build/python/python.exe",
+    "cc": "cl.exe",
+    "cxx": "cl.exe",
+    "patches": {
+    }
+}
diff --git a/build/build-clang/clang-static-analysis-win64.json b/build/build-clang/clang-static-analysis-win64.json
new file mode 100644
index 000000000..cf626f05e
--- /dev/null
+++ b/build/build-clang/clang-static-analysis-win64.json
@@ -0,0 +1,16 @@
+{
+    "llvm_revision": "262971",
+    "stages": "3",
+    "build_libcxx": false,
+    "build_type": "Release",
+    "assertions": false,
+    "llvm_repo": "https://llvm.org/svn/llvm-project/llvm/trunk",
+    "clang_repo": "https://llvm.org/svn/llvm-project/cfe/trunk",
+    "compiler_repo": "https://llvm.org/svn/llvm-project/compiler-rt/trunk",
+    "libcxx_repo": "https://llvm.org/svn/llvm-project/libcxx/trunk",
+    "python_path": "c:/mozilla-build/python/python.exe",
+    "cc": "c:/Program Files (x86)/Microsoft Visual Studio 12.0/VC/BIN/amd64/cl.exe",
+    "cxx": "c:/Program Files (x86)/Microsoft Visual Studio 12.0/VC/BIN/amd64/cl.exe",
+    "patches": {
+    }
+}
diff --git a/build/build-clang/disable-mac-tsan.patch b/build/build-clang/disable-mac-tsan.patch
new file mode 100644
index 000000000..3bd0d3c60
--- /dev/null
+++ b/build/build-clang/disable-mac-tsan.patch
@@ -0,0 +1,11 @@
+--- a/compiler-rt/cmake/config-ix.cmake
++++ b/compiler-rt/cmake/config-ix.cmake
+@@ -617,7 +617,7 @@
+ endif()
+ 
+ if (COMPILER_RT_HAS_SANITIZER_COMMON AND TSAN_SUPPORTED_ARCH AND
+-    OS_NAME MATCHES "Darwin|Linux|FreeBSD")
++    OS_NAME MATCHES "Linux|FreeBSD")
+   set(COMPILER_RT_HAS_TSAN TRUE)
+ else()
+   set(COMPILER_RT_HAS_TSAN FALSE)
diff --git a/build/build-clang/llvm-debug-frame.patch b/build/build-clang/llvm-debug-frame.patch
new file mode 100644
index 000000000..a8c57ce6f
--- /dev/null
+++ b/build/build-clang/llvm-debug-frame.patch
@@ -0,0 +1,13 @@
+Index: lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+===================================================================
+--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp	(revision 226419)
++++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp	(working copy)
+@@ -210,6 +210,8 @@
+     OutStreamer->EmitFileDirective(M.getModuleIdentifier());
+   }
+
++  OutStreamer->EmitCFISections(true, true);
++
+   GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
+   assert(MI && "AsmPrinter didn't require GCModuleInfo?");
+   for (auto &I : *MI)
diff --git a/build/build-clang/query-selector-visibility.patch b/build/build-clang/query-selector-visibility.patch
new file mode 100644
index 000000000..46a9642bd
--- /dev/null
+++ b/build/build-clang/query-selector-visibility.patch
@@ -0,0 +1,79 @@
+commit 865b9340996f9f9d04b73b187248737dc6fd845e
+Author: Michael Wu <mwu@mozilla.com>
+Date:   Mon Sep 14 17:47:21 2015 -0400
+
+    Add support for querying the visibility of a cursor
+
+diff --git a/clang/include/clang-c/Index.h b/clang/include/clang-c/Index.h
+index fad9cfa..311bfcb 100644
+--- a/clang/include/clang-c/Index.h
++++ b/clang/include/clang-c/Index.h
+@@ -2440,6 +2440,24 @@ enum CXLinkageKind {
+ CINDEX_LINKAGE enum CXLinkageKind clang_getCursorLinkage(CXCursor cursor);
+ 
+ /**
++ * \brief Describe the visibility of the entity referred to by a cursor.
++ */
++enum CXVisibilityKind {
++  /** \brief This value indicates that no visibility information is available
++   * for a provided CXCursor. */
++  CXVisibility_Invalid,
++
++  /** \brief Symbol not seen by the linker. */
++  CXVisibility_Hidden,
++  /** \brief Symbol seen by the linker but resolves to a symbol inside this object. */
++  CXVisibility_Protected,
++  /** \brief Symbol seen by the linker and acts like a normal symbol. */
++  CXVisibility_Default,
++};
++
++CINDEX_LINKAGE enum CXVisibilityKind clang_getCursorVisibility(CXCursor cursor);
++
++/**
+  * \brief Determine the availability of the entity that this cursor refers to,
+  * taking the current target platform into account.
+  *
+diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
+index 8225a6c..9fa18d3 100644
+--- a/clang/tools/libclang/CIndex.cpp
++++ b/clang/tools/libclang/CIndex.cpp
+@@ -6361,6 +6361,27 @@ CXLinkageKind clang_getCursorLinkage(CXCursor cursor) {
+ } // end: extern "C"
+ 
+ //===----------------------------------------------------------------------===//
++// Operations for querying visibility of a cursor.
++//===----------------------------------------------------------------------===//
++
++extern "C" {
++CXVisibilityKind clang_getCursorVisibility(CXCursor cursor) {
++  if (!clang_isDeclaration(cursor.kind))
++    return CXVisibility_Invalid;
++
++  const Decl *D = cxcursor::getCursorDecl(cursor);
++  if (const NamedDecl *ND = dyn_cast_or_null<NamedDecl>(D))
++    switch (ND->getVisibility()) {
++      case HiddenVisibility: return CXVisibility_Hidden;
++      case ProtectedVisibility: return CXVisibility_Protected;
++      case DefaultVisibility: return CXVisibility_Default;
++    };
++
++  return CXVisibility_Invalid;
++}
++} // end: extern "C"
++
++//===----------------------------------------------------------------------===//
+ // Operations for querying language of a cursor.
+ //===----------------------------------------------------------------------===//
+ 
+diff --git a/clang/tools/libclang/libclang.exports b/clang/tools/libclang/libclang.exports
+index f6a7175..a919a8e 100644
+--- a/clang/tools/libclang/libclang.exports
++++ b/clang/tools/libclang/libclang.exports
+@@ -173,6 +173,7 @@ clang_getCursorSemanticParent
+ clang_getCursorSpelling
+ clang_getCursorType
+ clang_getCursorUSR
++clang_getCursorVisibility
+ clang_getDeclObjCTypeEncoding
+ clang_getDefinitionSpellingAndExtent
+ clang_getDiagnostic
diff --git a/build/build-clang/return-empty-string-non-mangled.patch b/build/build-clang/return-empty-string-non-mangled.patch
new file mode 100644
index 000000000..33a391703
--- /dev/null
+++ b/build/build-clang/return-empty-string-non-mangled.patch
@@ -0,0 +1,19 @@
+Author: Michael Wu <mwu@mozilla.com>
+Date:   Thu Sep 24 11:36:08 2015 -0400
+
+    Return an empty string when a symbol isn't mangled
+
+diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
+--- a/clang/tools/libclang/CIndex.cpp
++++ b/clang/tools/libclang/CIndex.cpp
+@@ -3990,6 +3990,10 @@
+   ASTContext &Ctx = ND->getASTContext();
+   std::unique_ptr<MangleContext> MC(Ctx.createMangleContext());
+ 
++  // Don't mangle if we don't need to.
++  if (!MC->shouldMangleCXXName(ND))
++    return cxstring::createEmpty();
++
+   std::string FrontendBuf;
+   llvm::raw_string_ostream FrontendBufOS(FrontendBuf);
+   if (MC->shouldMangleDeclName(ND)) {