diff options
Diffstat (limited to 'src/couch/priv/couch_js/86/main.cpp')
-rw-r--r-- | src/couch/priv/couch_js/86/main.cpp | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/src/couch/priv/couch_js/86/main.cpp b/src/couch/priv/couch_js/86/main.cpp new file mode 100644 index 000000000..291409944 --- /dev/null +++ b/src/couch/priv/couch_js/86/main.cpp @@ -0,0 +1,341 @@ +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy of +// the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations under +// the License. + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#ifdef XP_WIN +#define NOMINMAX +#include <windows.h> +#else +#include <unistd.h> +#endif + +#include <jsapi.h> +#include <js/CompilationAndEvaluation.h> +#include <js/Conversions.h> +#include <js/Initialization.h> +#include <js/SourceText.h> +#include <js/StableStringChars.h> +#include <js/Warnings.h> +#include <js/Wrapper.h> + +#include "config.h" +#include "util.h" + +static bool enableSharedMemory = true; +static bool enableToSource = true; + +static JSClassOps global_ops = { + nullptr, + nullptr, + nullptr, + nullptr, + nullptr, + nullptr, + nullptr, + nullptr, + nullptr, + nullptr, + JS_GlobalObjectTraceHook +}; + +/* The class of the global object. */ +static JSClass global_class = { + "global", + JSCLASS_GLOBAL_FLAGS, + &global_ops +}; + +static JSObject* +NewSandbox(JSContext* cx, bool lazy) +{ + JS::RealmOptions options; + options.creationOptions().setSharedMemoryAndAtomicsEnabled(enableSharedMemory); + options.creationOptions().setNewCompartmentAndZone(); + // we need this in the query server error handling + options.creationOptions().setToSourceEnabled(enableToSource); + JS::RootedObject obj(cx, JS_NewGlobalObject(cx, &global_class, nullptr, + JS::DontFireOnNewGlobalHook, options)); + if (!obj) + return nullptr; + + { + JSAutoRealm ac(cx, obj); + if (!lazy && !JS::InitRealmStandardClasses(cx)) + return nullptr; + + JS::RootedValue value(cx, JS::BooleanValue(lazy)); + if (!JS_DefineProperty(cx, obj, "lazy", value, JSPROP_PERMANENT | JSPROP_READONLY)) + return nullptr; + + JS_FireOnNewGlobalObject(cx, obj); + } + + if (!JS_WrapObject(cx, &obj)) + return nullptr; + return obj; +} + +static bool +evalcx(JSContext *cx, unsigned int argc, JS::Value* vp) +{ + JS::CallArgs args = JS::CallArgsFromVp(argc, vp); + bool ret = false; + + JS::RootedString str(cx, args[0].toString()); + if (!str) + return false; + + JS::RootedObject sandbox(cx); + if (args.hasDefined(1)) { + sandbox = JS::ToObject(cx, args[1]); + if (!sandbox) + return false; + } + + if (!sandbox) { + sandbox = NewSandbox(cx, false); + if (!sandbox) + return false; + } + + JS::AutoStableStringChars strChars(cx); + if (!strChars.initTwoByte(cx, str)) + return false; + + mozilla::Range<const char16_t> chars = strChars.twoByteRange(); + JS::SourceText<char16_t> srcBuf; + if (!srcBuf.init(cx, chars.begin().get(), chars.length(), + JS::SourceOwnership::Borrowed)) { + return false; + } + + if(srcBuf.length() == 0) { + args.rval().setObject(*sandbox); + } else { + mozilla::Maybe<JSAutoRealm> ar; + unsigned flags; + JSObject* unwrapped = UncheckedUnwrap(sandbox, true, &flags); + if (flags & js::Wrapper::CROSS_COMPARTMENT) { + sandbox = unwrapped; + ar.emplace(cx, sandbox); + } + + JS::CompileOptions opts(cx); + JS::RootedValue rval(cx); + opts.setFileAndLine("<unknown>", 1); + + if (!JS::Evaluate(cx, opts, srcBuf, args.rval())) { + return false; + } + } + ret = true; + if (!JS_WrapValue(cx, args.rval())) + return false; + + return ret; +} + + +static bool +gc(JSContext* cx, unsigned int argc, JS::Value* vp) +{ + JS::CallArgs args = JS::CallArgsFromVp(argc, vp); + JS_GC(cx); + args.rval().setUndefined(); + return true; +} + + +static bool +print(JSContext* cx, unsigned int argc, JS::Value* vp) +{ + JS::CallArgs args = JS::CallArgsFromVp(argc, vp); + + bool use_stderr = false; + if(argc > 1 && args[1].isTrue()) { + use_stderr = true; + } + + if(!args[0].isString()) { + JS_ReportErrorUTF8(cx, "Unable to print non-string value."); + return false; + } + + couch_print(cx, args[0], use_stderr); + + args.rval().setUndefined(); + return true; +} + + +static bool +quit(JSContext* cx, unsigned int argc, JS::Value* vp) +{ + JS::CallArgs args = JS::CallArgsFromVp(argc, vp); + + int exit_code = args[0].toInt32();; + exit(exit_code); +} + + +static bool +readline(JSContext* cx, unsigned int argc, JS::Value* vp) +{ + JSString* line; + JS::CallArgs args = JS::CallArgsFromVp(argc, vp); + + /* GC Occasionally */ + JS_MaybeGC(cx); + + line = couch_readline(cx, stdin); + if(line == NULL) return false; + + // return with JSString* instead of JSValue in the past + args.rval().setString(line); + return true; +} + + +static bool +seal(JSContext* cx, unsigned int argc, JS::Value* vp) +{ + JS::CallArgs args = JS::CallArgsFromVp(argc, vp); + JS::RootedObject target(cx); + target = JS::ToObject(cx, args[0]); + if (!target) { + args.rval().setUndefined(); + return true; + } + bool deep = false; + deep = args[1].toBoolean(); + bool ret = deep ? JS_DeepFreezeObject(cx, target) : JS_FreezeObject(cx, target); + args.rval().setUndefined(); + return ret; +} + + +static JSFunctionSpec global_functions[] = { + JS_FN("evalcx", evalcx, 0, 0), + JS_FN("gc", gc, 0, 0), + JS_FN("print", print, 0, 0), + JS_FN("quit", quit, 0, 0), + JS_FN("readline", readline, 0, 0), + JS_FN("seal", seal, 0, 0), + JS_FS_END +}; + + +static bool +csp_allows(JSContext* cx, JS::HandleString code) +{ + couch_args* args = static_cast<couch_args*>(JS_GetContextPrivate(cx)); + if(args->eval) { + return true; + } else { + return false; + } +} + + +static JSSecurityCallbacks security_callbacks = { + csp_allows, + nullptr +}; + + +int +main(int argc, const char* argv[]) +{ + JSContext* cx = NULL; + int i; + + couch_args* args = couch_parse_args(argc, argv); + + JS_Init(); + cx = JS_NewContext(args->stack_size); + if(cx == NULL) + return 1; + + JS_SetGlobalJitCompilerOption(cx, JSJITCOMPILER_BASELINE_ENABLE, 0); + JS_SetGlobalJitCompilerOption(cx, JSJITCOMPILER_ION_ENABLE, 0); + + if (!JS::InitSelfHostedCode(cx)) + return 1; + + JS::SetWarningReporter(cx, couch_error); + JS::SetOutOfMemoryCallback(cx, couch_oom, NULL); + JS_SetContextPrivate(cx, args); + JS_SetSecurityCallbacks(cx, &security_callbacks); + + JS::RealmOptions options; + JS::RootedObject global(cx, JS_NewGlobalObject(cx, &global_class, nullptr, + JS::FireOnNewGlobalHook, options)); + if (!global) + return 1; + + JSAutoRealm ar(cx, global); + + if(!JS::InitRealmStandardClasses(cx)) + return 1; + + if(couch_load_funcs(cx, global, global_functions) != true) + return 1; + + for(i = 0 ; args->scripts[i] ; i++) { + const char* filename = args->scripts[i]; + + // Compile and run + JS::CompileOptions options(cx); + options.setFileAndLine(filename, 1); + JS::RootedScript script(cx); + FILE* fp; + + fp = fopen(args->scripts[i], "r"); + if(fp == NULL) { + fprintf(stderr, "Failed to read file: %s\n", filename); + return 3; + } + script = JS::CompileUtf8File(cx, options, fp); + fclose(fp); + if (!script) { + JS::RootedValue exc(cx); + if(!JS_GetPendingException(cx, &exc)) { + fprintf(stderr, "Failed to compile file: %s\n", filename); + } else { + JS::RootedObject exc_obj(cx, &exc.toObject()); + JSErrorReport* report = JS_ErrorFromException(cx, exc_obj); + couch_error(cx, report); + } + return 1; + } + + JS::RootedValue result(cx); + if(JS_ExecuteScript(cx, script, &result) != true) { + JS::RootedValue exc(cx); + if(!JS_GetPendingException(cx, &exc)) { + fprintf(stderr, "Failed to execute script.\n"); + } else { + JS::RootedObject exc_obj(cx, &exc.toObject()); + JSErrorReport* report = JS_ErrorFromException(cx, exc_obj); + couch_error(cx, report); + } + } + + // Give the GC a chance to run. + JS_MaybeGC(cx); + } + + return 0; +} |