intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 294 insertions, 0 deletions

diff --git a/build/scripts/link_dyn_lib.py b/build/scripts/link_dyn_lib.py
new file mode 100644
index 0000000000..23487f5c1e
--- /dev/null
+++ b/build/scripts/link_dyn_lib.py
@@ -0,0 +1,294 @@
+import sys
+import os
+import subprocess
+import tempfile
+import collections
+import optparse
+import pipes
+
+from process_whole_archive_option import ProcessWholeArchiveOption
+
+
+def shlex_join(cmd):
+    # equivalent to shlex.join() in python 3
+    return ' '.join(
+        pipes.quote(part)
+        for part in cmd
+    )
+
+
+def parse_export_file(p):
+    with open(p, 'r') as f:
+        for l in f:
+            l = l.strip()
+
+            if l and '#' not in l:
+                words = l.split()
+                if len(words) == 2 and words[0] == 'linux_version':
+                    yield {'linux_version': words[1]}
+                elif len(words) == 2:
+                    yield {'lang': words[0], 'sym': words[1]}
+                elif len(words) == 1:
+                    yield {'lang': 'C', 'sym': words[0]}
+                else:
+                    raise Exception('unsupported exports line: ' + l)
+
+
+def to_c(sym):
+    symbols = collections.deque(sym.split('::'))
+    c_prefixes = [  # demangle prefixes for c++ symbols
+        '_ZN',      # namespace
+        '_ZTIN',    # typeinfo for
+        '_ZTSN',    # typeinfo name for
+        '_ZTTN',    # VTT for
+        '_ZTVN',    # vtable for
+        '_ZNK',     # const methods
+    ]
+    c_sym = ''
+    while symbols:
+        s = symbols.popleft()
+        if s == '*':
+            c_sym += '*'
+            break
+        if '*' in s and len(s) > 1:
+            raise Exception('Unsupported format, cannot guess length of symbol: ' + s)
+        c_sym += str(len(s)) + s
+    if symbols:
+        raise Exception('Unsupported format: ' + sym)
+    if c_sym[-1] != '*':
+        c_sym += 'E*'
+    return ['{prefix}{sym}'.format(prefix=prefix, sym=c_sym) for prefix in c_prefixes]
+
+
+def fix_darwin_param(ex):
+    for item in ex:
+        if item.get('linux_version'):
+            continue
+
+        if item['lang'] == 'C':
+            yield '-Wl,-exported_symbol,_' + item['sym']
+        elif item['lang'] == 'C++':
+            for sym in to_c(item['sym']):
+                yield '-Wl,-exported_symbol,_' + sym
+        else:
+            raise Exception('unsupported lang: ' + item['lang'])
+
+
+def fix_gnu_param(arch, ex):
+    d = collections.defaultdict(list)
+    version = None
+    for item in ex:
+        if item.get('linux_version'):
+            if not version:
+                version = item.get('linux_version')
+            else:
+                raise Exception('More than one linux_version defined')
+        elif item['lang'] == 'C++':
+            d['C'].extend(to_c(item['sym']))
+        else:
+            d[item['lang']].append(item['sym'])
+
+    with tempfile.NamedTemporaryFile(mode='wt', delete=False) as f:
+        if version:
+            f.write('{} {{\nglobal:\n'.format(version))
+        else:
+            f.write('{\nglobal:\n')
+
+        for k, v in d.items():
+            f.write('    extern "' + k + '" {\n')
+
+            for x in v:
+                f.write('        ' + x + ';\n')
+
+            f.write('    };\n')
+
+        f.write('local: *;\n};\n')
+
+        ret = ['-Wl,--version-script=' + f.name]
+
+        if arch == 'ANDROID':
+            ret += ['-Wl,--export-dynamic']
+
+        return ret
+
+
+def fix_windows_param(ex):
+    with tempfile.NamedTemporaryFile(delete=False) as def_file:
+        exports = []
+        for item in ex:
+            if item.get('lang') == 'C':
+                exports.append(item.get('sym'))
+        def_file.write('EXPORTS\n')
+        for export in exports:
+            def_file.write('    {}\n'.format(export))
+        return ['/DEF:{}'.format(def_file.name)]
+
+
+musl_libs = '-lc', '-lcrypt', '-ldl', '-lm', '-lpthread', '-lrt', '-lutil'
+
+
+def fix_cmd(arch, musl, c):
+    if arch == 'WINDOWS':
+        prefix = '/DEF:'
+        f = fix_windows_param
+    else:
+        prefix = '-Wl,--version-script='
+        if arch in ('DARWIN', 'IOS'):
+            f = fix_darwin_param
+        else:
+            f = lambda x: fix_gnu_param(arch, x)
+
+    def do_fix(p):
+        if musl and p in musl_libs:
+            return []
+
+        if p.startswith(prefix) and p.endswith('.exports'):
+            fname = p[len(prefix):]
+
+            return list(f(list(parse_export_file(fname))))
+
+        if p.endswith('.supp'):
+            return []
+
+        if p.endswith('.pkg.fake'):
+            return []
+
+        return [p]
+
+    return sum((do_fix(x) for x in c), [])
+
+
+def parse_args():
+    parser = optparse.OptionParser()
+    parser.disable_interspersed_args()
+    parser.add_option('--arch')
+    parser.add_option('--target')
+    parser.add_option('--soname')
+    parser.add_option('--fix-elf')
+    parser.add_option('--linker-output')
+    parser.add_option('--musl', action='store_true')
+    parser.add_option('--whole-archive-peers', action='append')
+    parser.add_option('--whole-archive-libs', action='append')
+    return parser.parse_args()
+
+
+if __name__ == '__main__':
+    opts, args = parse_args()
+
+    assert opts.arch
+    assert opts.target
+
+    cmd = fix_cmd(opts.arch, opts.musl, args)
+    cmd = ProcessWholeArchiveOption(opts.arch, opts.whole_archive_peers, opts.whole_archive_libs).construct_cmd(cmd)
+
+    if opts.linker_output:
+        stdout = open(opts.linker_output, 'w')
+    else:
+        stdout = sys.stdout
+
+    proc = subprocess.Popen(cmd, shell=False, stderr=sys.stderr, stdout=stdout)
+    proc.communicate()
+
+    if proc.returncode:
+        print >>sys.stderr, 'linker has failed with retcode:', proc.returncode
+        print >>sys.stderr, 'linker command:', shlex_join(cmd)
+        sys.exit(proc.returncode)
+
+    if opts.fix_elf:
+        cmd = [opts.fix_elf, opts.target]
+        proc = subprocess.Popen(cmd, shell=False, stderr=sys.stderr, stdout=sys.stdout)
+        proc.communicate()
+
+        if proc.returncode:
+            print >>sys.stderr, 'fix_elf has failed with retcode:', proc.returncode
+            print >>sys.stderr, 'fix_elf command:', shlex_join(cmd)
+            sys.exit(proc.returncode)
+
+    if opts.soname and opts.soname != opts.target:
+        if os.path.exists(opts.soname):
+            os.unlink(opts.soname)
+        os.link(opts.target, opts.soname)
+
+
+# -----------------Test---------------- #
+def write_temp_file(content):
+    import yatest.common as yc
+    filename = yc.output_path('test.exports')
+    with open(filename, 'w') as f:
+        f.write(content)
+    return filename
+
+
+def test_fix_cmd_darwin():
+    export_file_content = """
+C++ geobase5::details::lookup_impl::*
+C++ geobase5::hardcoded_service
+"""
+    filename = write_temp_file(export_file_content)
+    args = ['-Wl,--version-script={}'.format(filename)]
+    assert fix_cmd('DARWIN', False, args) == [
+        '-Wl,-exported_symbol,__ZN8geobase57details11lookup_impl*',
+        '-Wl,-exported_symbol,__ZTIN8geobase57details11lookup_impl*',
+        '-Wl,-exported_symbol,__ZTSN8geobase57details11lookup_impl*',
+        '-Wl,-exported_symbol,__ZTTN8geobase57details11lookup_impl*',
+        '-Wl,-exported_symbol,__ZTVN8geobase57details11lookup_impl*',
+        '-Wl,-exported_symbol,__ZNK8geobase57details11lookup_impl*',
+        '-Wl,-exported_symbol,__ZN8geobase517hardcoded_serviceE*',
+        '-Wl,-exported_symbol,__ZTIN8geobase517hardcoded_serviceE*',
+        '-Wl,-exported_symbol,__ZTSN8geobase517hardcoded_serviceE*',
+        '-Wl,-exported_symbol,__ZTTN8geobase517hardcoded_serviceE*',
+        '-Wl,-exported_symbol,__ZTVN8geobase517hardcoded_serviceE*',
+        '-Wl,-exported_symbol,__ZNK8geobase517hardcoded_serviceE*',
+    ]
+
+
+def run_fix_gnu_param(export_file_content):
+    filename = write_temp_file(export_file_content)
+    result = fix_gnu_param('LINUX', list(parse_export_file(filename)))[0]
+    version_script_path = result[len('-Wl,--version-script='):]
+    with open(version_script_path) as f:
+        content = f.read()
+    return content
+
+
+def test_fix_gnu_param():
+    export_file_content = """
+C++ geobase5::details::lookup_impl::*
+C   getFactoryMap
+"""
+    assert run_fix_gnu_param(export_file_content) == """{
+global:
+    extern "C" {
+        _ZN8geobase57details11lookup_impl*;
+        _ZTIN8geobase57details11lookup_impl*;
+        _ZTSN8geobase57details11lookup_impl*;
+        _ZTTN8geobase57details11lookup_impl*;
+        _ZTVN8geobase57details11lookup_impl*;
+        _ZNK8geobase57details11lookup_impl*;
+        getFactoryMap;
+    };
+local: *;
+};
+"""
+
+
+def test_fix_gnu_param_with_linux_version():
+    export_file_content = """
+C++ geobase5::details::lookup_impl::*
+linux_version ver1.0
+C   getFactoryMap
+"""
+    assert run_fix_gnu_param(export_file_content) == """ver1.0 {
+global:
+    extern "C" {
+        _ZN8geobase57details11lookup_impl*;
+        _ZTIN8geobase57details11lookup_impl*;
+        _ZTSN8geobase57details11lookup_impl*;
+        _ZTTN8geobase57details11lookup_impl*;
+        _ZTVN8geobase57details11lookup_impl*;
+        _ZNK8geobase57details11lookup_impl*;
+        getFactoryMap;
+    };
+local: *;
+};
+"""