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5116a6a9b4
Use a fixed random seed to ensure that the generated sources are identical across runs. The final node binary still reseeds itself on start-up so there should be no security implications caused by predictable random numbers (e.g., `Math.random()`, ASLR, the hash seed, etc.) Fixes: https://github.com/nodejs/node/issues/29108 PR-URL: https://github.com/nodejs/node/pull/29142 Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
#include <cstdio>
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#include <fstream>
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#include <iostream>
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#include <sstream>
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#include <string>
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#include <vector>
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#include "cache_builder.h"
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#include "libplatform/libplatform.h"
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#include "v8.h"
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using node::native_module::CodeCacheBuilder;
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using v8::ArrayBuffer;
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using v8::Context;
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using v8::HandleScope;
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using v8::Isolate;
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using v8::Local;
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#ifdef _WIN32
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#include <VersionHelpers.h>
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#include <WinError.h>
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#include <windows.h>
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int wmain(int argc, wchar_t* argv[]) {
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#else // UNIX
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int main(int argc, char* argv[]) {
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#endif // _WIN32
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v8::V8::SetFlagsFromString("--random_seed=42");
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if (argc < 2) {
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std::cerr << "Usage: " << argv[0] << " <path/to/output.cc>\n";
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return 1;
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}
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std::ofstream out;
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out.open(argv[1], std::ios::out | std::ios::binary);
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if (!out.is_open()) {
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std::cerr << "Cannot open " << argv[1] << "\n";
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return 1;
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}
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std::unique_ptr<v8::Platform> platform = v8::platform::NewDefaultPlatform();
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v8::V8::InitializePlatform(platform.get());
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v8::V8::Initialize();
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// Create a new Isolate and make it the current one.
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Isolate::CreateParams create_params;
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create_params.array_buffer_allocator =
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ArrayBuffer::Allocator::NewDefaultAllocator();
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Isolate* isolate = Isolate::New(create_params);
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{
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Isolate::Scope isolate_scope(isolate);
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v8::HandleScope handle_scope(isolate);
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v8::Local<v8::Context> context = v8::Context::New(isolate);
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v8::Context::Scope context_scope(context);
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// The command line flags are part of the code cache's checksum so reset
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// --random_seed= to its default value before creating the code cache.
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v8::V8::SetFlagsFromString("--random_seed=0");
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std::string cache = CodeCacheBuilder::Generate(context);
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out << cache;
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out.close();
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}
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v8::V8::ShutdownPlatform();
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return 0;
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}
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