92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
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// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/startup-data-util.h"
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#include <stdlib.h>
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#include <string.h>
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#include "src/base/logging.h"
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namespace v8 {
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#ifdef V8_USE_EXTERNAL_STARTUP_DATA
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StartupDataHandler::StartupDataHandler(const char* exec_path,
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const char* natives_blob,
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const char* snapshot_blob) {
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// If we have (at least one) explicitly given blob, use those.
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// If not, use the default blob locations next to the d8 binary.
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if (natives_blob || snapshot_blob) {
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LoadFromFiles(natives_blob, snapshot_blob);
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} else {
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char* natives;
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char* snapshot;
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LoadFromFiles(RelativePath(&natives, exec_path, "natives_blob.bin"),
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RelativePath(&snapshot, exec_path, "snapshot_blob.bin"));
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free(natives);
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free(snapshot);
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}
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}
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StartupDataHandler::~StartupDataHandler() {
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delete[] natives_.data;
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delete[] snapshot_.data;
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}
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char* StartupDataHandler::RelativePath(char** buffer, const char* exec_path,
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const char* name) {
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DCHECK(exec_path);
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const char* last_slash = strrchr(exec_path, '/');
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if (last_slash) {
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int after_slash = last_slash - exec_path + 1;
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int name_length = static_cast<int>(strlen(name));
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*buffer = reinterpret_cast<char*>(calloc(after_slash + name_length + 1, 1));
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strncpy(*buffer, exec_path, after_slash);
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strncat(*buffer, name, name_length);
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} else {
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*buffer = strdup(name);
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}
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return *buffer;
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}
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void StartupDataHandler::LoadFromFiles(const char* natives_blob,
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const char* snapshot_blob) {
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Load(natives_blob, &natives_, v8::V8::SetNativesDataBlob);
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Load(snapshot_blob, &snapshot_, v8::V8::SetSnapshotDataBlob);
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}
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void StartupDataHandler::Load(const char* blob_file,
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v8::StartupData* startup_data,
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void (*setter_fn)(v8::StartupData*)) {
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startup_data->data = NULL;
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startup_data->raw_size = 0;
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if (!blob_file) return;
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FILE* file = fopen(blob_file, "rb");
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if (!file) return;
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fseek(file, 0, SEEK_END);
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startup_data->raw_size = ftell(file);
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rewind(file);
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startup_data->data = new char[startup_data->raw_size];
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int read_size = static_cast<int>(fread(const_cast<char*>(startup_data->data),
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1, startup_data->raw_size, file));
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fclose(file);
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if (startup_data->raw_size == read_size) (*setter_fn)(startup_data);
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}
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#endif // V8_USE_EXTERNAL_STARTUP_DATA
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} // namespace v8
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