cef/tools/make_libcef_dll_dylib_impl.py

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# Copyright (c) 2018 The Chromium Embedded Framework Authors. All rights
# reserved. Use of this source code is governed by a BSD-style license that
# can be found in the LICENSE file.
from __future__ import absolute_import
from cef_parser import *
from file_util import *
import os
# Other headers that export C API functions.
OTHER_HEADERS = [
'cef_api_hash.h',
'cef_version.h',
'internal/cef_logging_internal.h',
'internal/cef_string_list.h',
'internal/cef_string_map.h',
'internal/cef_string_multimap.h',
'internal/cef_string_types.h',
'internal/cef_thread_internal.h',
'internal/cef_time.h',
'internal/cef_trace_event_internal.h',
]
def make_libcef_dll_dylib_impl_parts(name, retval, args):
# Split arguments into types and names.
arg_types = ''
arg_names = ''
for arg in args:
if len(arg_types) > 0:
arg_types += ', '
arg_names += ', '
pos = arg.rfind(' ')
arg_types += arg[0:pos]
arg_names += arg[pos + 1:]
declare = 'decltype(&%s) %s;\n' % (name, name)
init = ' INIT_ENTRY(%s);' % name
impl = """NO_SANITIZE("cfi-icall") %s %s(%s) {
%sg_libcef_pointers.%s(%s);
}
""" % (retval, name, ', '.join(args), 'return '
if retval != 'void' else '', name, arg_names)
return (declare, init, impl)
def make_libcef_dll_dylib_impl_func(func):
name = func.get_capi_name()
parts = func.get_capi_parts([], True)
retval = parts['retval']
args = parts['args']
return make_libcef_dll_dylib_impl_parts(name, retval, args)
def make_libcef_dll_dylib_impl(header):
filenames = []
includes = [
'#include "include/base/cef_compiler_specific.h"',
'#include "include/wrapper/cef_library_loader.h"',
]
ptr_declare = ''
ptr_init = ''
ptr_impl = ''
# Include required headers for global functions.
for func in header.get_funcs():
declare, init, impl = make_libcef_dll_dylib_impl_func(func)
ptr_declare += declare
ptr_init += init
ptr_impl += impl
filename = func.get_file_name()
if not filename in filenames:
includes.append('#include "include/capi/%s"' % func.get_capi_file_name())
filenames.append(filename)
# Include required headers for static class functions.
allclasses = header.get_classes()
for cls in allclasses:
funcs = cls.get_static_funcs()
for func in funcs:
declare, init, impl = make_libcef_dll_dylib_impl_func(func)
ptr_declare += declare
ptr_init += init
ptr_impl += impl
if len(funcs) > 0:
filename = cls.get_file_name()
if not filename in filenames:
includes.append('#include "include/capi/%s"' % cls.get_capi_file_name())
filenames.append(filename)
# Parse other headers.
root_directory = header.get_root_directory()
for other in OTHER_HEADERS:
path = os.path.join(root_directory, other)
content = read_file(path)
funcs = get_function_impls(content, 'CEF_EXPORT', False)
for func in funcs:
declare, init, impl = make_libcef_dll_dylib_impl_parts(
func['name'], func['retval'], func['args'])
ptr_declare += declare
ptr_init += init
ptr_impl += impl
includes.append('#include "include/%s"' % other)
# Build the final output.
result = get_copyright() + """
#include <dlfcn.h>
#include <stdio.h>
""" + "\n".join(sorted(includes)) + """
// GLOBAL WRAPPER FUNCTIONS - Do not edit by hand.
namespace {
void* g_libcef_handle = nullptr;
void* libcef_get_ptr(const char* path, const char* name) {
void* ptr = dlsym(g_libcef_handle, name);
if (!ptr) {
fprintf(stderr, "dlsym %s: %s\\n", path, dlerror());
}
return ptr;
}
struct libcef_pointers {
""" + ptr_declare + """
} g_libcef_pointers = {0};
#define INIT_ENTRY(name) \
g_libcef_pointers.name = (decltype(&name))libcef_get_ptr(path, #name); \
if (!g_libcef_pointers.name) { \
return 0; \
}
int libcef_init_pointers(const char* path) {
""" + ptr_init + """
return 1;
}
} // namespace
int cef_load_library(const char* path) {
if (g_libcef_handle)
return 0;
g_libcef_handle = dlopen(path, RTLD_LAZY | RTLD_LOCAL | RTLD_FIRST);
if (!g_libcef_handle) {
fprintf(stderr, "dlopen %s: %s\\n", path, dlerror());
return 0;
}
if (!libcef_init_pointers(path)) {
cef_unload_library();
return 0;
}
return 1;
}
int cef_unload_library() {
int result = 0;
if (g_libcef_handle) {
result = !dlclose(g_libcef_handle);
if (!result) {
fprintf(stderr, "dlclose: %s\\n", dlerror());
}
g_libcef_handle = nullptr;
}
return result;
}
""" + ptr_impl
return result
def write_libcef_dll_dylib_impl(header, file):
newcontents = make_libcef_dll_dylib_impl(header)
return (file, newcontents)
# Test the module.
if __name__ == "__main__":
import sys
# Verify that the correct number of command-line arguments are provided.
if len(sys.argv) < 2:
sys.stderr.write('Usage: ' + sys.argv[0] + ' <cpp_header_dir>\n')
sys.exit()
cpp_header_dir = sys.argv[1]
# Create the header object. Should match the logic in translator.py.
header = obj_header()
header.set_root_directory(cpp_header_dir)
excluded_files = ['cef_api_hash.h', 'cef_application_mac.h', 'cef_version.h']
header.add_directory(cpp_header_dir, excluded_files)
header.add_directory(os.path.join(cpp_header_dir, 'test'))
header.add_directory(os.path.join(cpp_header_dir, 'views'))
# Dump the result to stdout.
sys.stdout.write(make_libcef_dll_dylib_impl(header))