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ab212fedb3
Update use of IsolateData in Dartium's vm service. R=zra@google.com Review-Url: https://codereview.chromium.org/2695403003 .
146 lines
4.5 KiB
C++
146 lines
4.5 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "bin/extensions.h"
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#include <stdio.h>
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#include "bin/dartutils.h"
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#include "bin/file.h"
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#include "bin/platform.h"
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#include "bin/utils.h"
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#include "include/dart_api.h"
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#include "platform/assert.h"
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#include "platform/globals.h"
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namespace dart {
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namespace bin {
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static char PathSeparator() {
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const char* sep = File::PathSeparator();
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ASSERT(strlen(sep) == 1);
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return sep[0];
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}
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void* Extensions::MakePathAndResolve(const char* dir, const char* name) {
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// First try to find the library with a suffix specifying the architecture.
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{
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const char* path_components[] = {
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dir,
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Platform::LibraryPrefix(),
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name,
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"-",
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Platform::HostArchitecture(), // arm
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".",
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Platform::LibraryExtension(), // so
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NULL,
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};
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const char* library_file = Concatenate(path_components);
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void* library_handle = LoadExtensionLibrary(library_file);
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if (library_handle != NULL) {
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return library_handle;
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}
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}
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// Fall back on a library name without the suffix.
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{
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const char* path_components[] = {
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dir,
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Platform::LibraryPrefix(),
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name,
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".",
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Platform::LibraryExtension(), // so
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NULL,
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};
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const char* library_file = Concatenate(path_components);
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return LoadExtensionLibrary(library_file);
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}
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}
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// IMPORTANT: In the absolute path case, do not extract the filename and search
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// for that by passing it to LoadLibrary. That can lead to confusion in
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// which the absolute path is wrong, and a different version of the library is
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// loaded from the standard location.
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void* Extensions::ResolveAbsPathExtension(const char* extension_path) {
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const char* last_slash = strrchr(extension_path, PathSeparator()) + 1;
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char* name = strdup(last_slash);
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char* dir = StringUtils::StrNDup(extension_path, last_slash - extension_path);
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void* library_handle = MakePathAndResolve(dir, name);
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free(dir);
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free(name);
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return library_handle;
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}
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void* Extensions::ResolveExtension(const char* extension_directory,
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const char* extension_name) {
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// If the path following dart-ext is an absolute path, then only look for the
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// library there.
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if (File::IsAbsolutePath(extension_name)) {
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return ResolveAbsPathExtension(extension_name);
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}
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// If the path following dart-ext is just a file name, first look next to
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// the importing Dart library.
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void* library_handle =
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MakePathAndResolve(extension_directory, extension_name);
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if (library_handle != NULL) {
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return library_handle;
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}
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// Then pass the library name down to the platform. E.g. dlopen will do its
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// own search in standard search locations.
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return MakePathAndResolve("", extension_name);
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}
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Dart_Handle Extensions::LoadExtension(const char* extension_directory,
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const char* extension_name,
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Dart_Handle parent_library) {
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void* library_handle = ResolveExtension(extension_directory, extension_name);
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if (library_handle == NULL) {
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return GetError();
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}
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const char* extension = extension_name;
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if (File::IsAbsolutePath(extension_name)) {
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extension = strrchr(extension_name, PathSeparator()) + 1;
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}
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const char* strings[] = {extension, "_Init", NULL};
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const char* init_function_name = Concatenate(strings);
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void* init_function = ResolveSymbol(library_handle, init_function_name);
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Dart_Handle result = GetError();
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if (Dart_IsError(result)) {
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return result;
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}
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ASSERT(init_function != NULL);
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typedef Dart_Handle (*InitFunctionType)(Dart_Handle import_map);
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InitFunctionType fn = reinterpret_cast<InitFunctionType>(init_function);
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return (*fn)(parent_library);
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}
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// Concatenates a NULL terminated array of strings.
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// The returned string is scope allocated.
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const char* Extensions::Concatenate(const char** strings) {
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int size = 1; // null termination.
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for (int i = 0; strings[i] != NULL; i++) {
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size += strlen(strings[i]);
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}
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char* result = reinterpret_cast<char*>(Dart_ScopeAllocate(size));
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int index = 0;
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for (int i = 0; strings[i] != NULL; i++) {
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index += snprintf(result + index, size - index, "%s", strings[i]);
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}
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ASSERT(index == size - 1);
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ASSERT(result[size - 1] == '\0');
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return result;
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}
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} // namespace bin
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} // namespace dart
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