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construct/ircd/js.cc

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/*
* charybdis: standing on the shoulders of giant build times
*
* Copyright (C) 2016 Charybdis Development Team
* Copyright (C) 2016 Jason Volk <jason@zemos.net>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <js/Initialization.h> // JS_Init() / JS_ShutDown()
#include <ircd/js/js.h>
namespace ircd {
namespace js {
// Location of the thread_local runtext. externs exist in js/runtime.h and js/context.h.
// If these are null, js is not available on your thread.
__thread runtime *rt;
__thread context *cx;
// Location of the main JSRuntime instance. An extern reference to this exists in js/runtime.h.
// It is null until js::init manually constructs (and later destructs) it.
runtime main;
// Location of the default/main JSContext instance. An extern reference to this exists in js/context.h.
// Lifetime similar to main runtime
context mc;
// Logging facility for this submodule with SNOMASK.
struct log::log log
{
"js", 'J'
};
} // namespace js
} // namespace ircd
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js.h - Without 3rd party (JSAPI) symbols
//
ircd::js::init::init()
try
{
log.info("Initializing the JS engine [%s: %s]",
"SpiderMonkey",
version(ver::IMPLEMENTATION));
if(!JS_Init())
throw error("JS_Init(): failure");
struct runtime::opts runtime_opts;
struct context::opts context_opts;
log.info("Initializing the main JS Runtime (main_maxbytes: %zu)",
runtime_opts.maxbytes);
main = runtime(runtime_opts);
mc = context(main, context_opts);
log.info("Initialized main JS Runtime and context (version: '%s')",
version(mc));
{
context::lock lock;
ircd::mods::load("kernel");
}
}
catch(...)
{
this->~init();
throw;
}
ircd::js::init::~init()
noexcept
{
if(cx && !!*cx)
{
context::lock lock;
ircd::mods::unload("kernel");
}
log.info("Terminating the main JS Runtime");
// Assign empty objects to free and reset
mc = context{};
main = runtime{};
log.info("Terminating the JS engine");
JS_ShutDown();
}
const char *
ircd::js::version(const ver &type)
{
switch(type)
{
case ver::IMPLEMENTATION:
return JS_GetImplementationVersion();
default:
throw error("version(): Unknown version type requested");
}
}
void
__attribute__((noreturn))
js::ReportOutOfMemory(ExclusiveContext *const c)
{
ircd::js::log.critical("jsalloc(): Reported out of memory (ExclusiveContext: %p)", (const void *)c);
std::terminate();
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/js.h - With 3rd party (JSAPI) symbols
//
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/trap.h
//
ircd::js::trap::trap(std::string name,
const uint32_t &flags)
:_name{std::move(name)}
,_class
{
this->_name.c_str(),
flags,
handle_add, // flags & JSCLASS_GLOBAL_FLAGS? nullptr : handle_add,
handle_del,
handle_get,
handle_set,
handle_enu,
handle_has,
nullptr, // JSConvertOp - Obsolete since SpiderMonkey 44 // 45 = mayResolve?
handle_dtor,
handle_call,
handle_inst,
handle_ctor,
flags & JSCLASS_GLOBAL_FLAGS? JS_GlobalObjectTraceHook : handle_trace,
{ this } // reserved[0] TODO: ?????????
}
{
}
ircd::js::trap::~trap()
noexcept
{
// Must run GC here to force reclamation of objects before
// the JSClass hosted by this trap destructs.
run_gc(*rt);
}
ircd::js::object
ircd::js::trap::operator()()
{
return { &_class };
}
ircd::js::object
ircd::js::trap::operator()(const object &proto)
{
return object { &_class, proto };
}
void
ircd::js::trap::handle_dtor(JSFreeOp *const op,
JSObject *const obj)
noexcept try
{
auto &trap(from(*obj));
trap.debug("dtor");
}
catch(const jserror &e)
{
e.set_pending();
return;
}
catch(const std::exception &e)
{
auto &trap(from(*obj));
trap.host_exception("dtor: %s", e.what());
return;
}
bool
ircd::js::trap::handle_ctor(JSContext *const c,
unsigned argc,
JS::Value *const argv)
noexcept try
{
assert(&our(c) == cx);
//debug("ctor");
return false;
}
catch(const jserror &e)
{
e.set_pending();
return false;
}
catch(const std::exception &e)
{
//auto &trap(from(obj));
//trap.host_exception("call: %s", e.what());
return false;
}
bool
ircd::js::trap::handle_call(JSContext *const c,
unsigned argc,
JS::Value *const argv)
noexcept try
{
assert(&our(c) == cx);
//debug("call");
return false;
}
catch(const jserror &e)
{
e.set_pending();
return false;
}
catch(const std::exception &e)
{
//auto &trap(from(obj));
//trap.host_exception("call: %s", e.what());
return false;
}
bool
ircd::js::trap::handle_enu(JSContext *const c,
JS::HandleObject obj)
noexcept try
{
assert(&our(c) == cx);
auto &trap(from(obj));
trap.debug("enu");
return trap.on_enu(*obj.get());
}
catch(const jserror &e)
{
e.set_pending();
return false;
}
catch(const std::exception &e)
{
auto &trap(from(obj));
trap.host_exception("enu: %s", e.what());
return false;
}
bool
ircd::js::trap::handle_has(JSContext *const c,
JS::HandleObject obj,
JS::HandleId id,
bool *const resolved)
noexcept try
{
assert(&our(c) == cx);
auto &trap(from(obj));
trap.debug("has: %s", string(id).c_str());
*resolved = trap.on_has(*obj.get(), id.get());
return true;
}
catch(const jserror &e)
{
e.set_pending();
return false;
}
catch(const std::exception &e)
{
auto &trap(from(obj));
trap.host_exception("has: '%s': %s",
string(id).c_str(),
e.what());
return false;
}
bool
ircd::js::trap::handle_del(JSContext *const c,
JS::HandleObject obj,
JS::HandleId id,
JS::ObjectOpResult &res)
noexcept try
{
assert(&our(c) == cx);
auto &trap(from(obj));
trap.debug("del: %s", string(id).c_str());
if(trap.on_del(*obj.get(), id.get()))
res.succeed();
return true;
}
catch(const jserror &e)
{
e.set_pending();
return false;
}
catch(const std::exception &e)
{
auto &trap(from(obj));
trap.host_exception("del '%s': %s",
string(id).c_str(),
e.what());
return false;
}
bool
ircd::js::trap::handle_get(JSContext *const c,
JS::HandleObject obj,
JS::HandleId id,
JS::MutableHandleValue val)
noexcept try
{
assert(&our(c) == cx);
auto &trap(from(obj));
trap.debug("get: %s", string(id).c_str());
val.set(trap.on_get(*obj.get(), id.get(), val));
return true;
}
catch(const jserror &e)
{
e.set_pending();
return false;
}
catch(const std::exception &e)
{
auto &trap(from(obj));
trap.host_exception("get: '%s': %s",
string(id).c_str(),
e.what());
return false;
}
bool
ircd::js::trap::handle_set(JSContext *const c,
JS::HandleObject obj,
JS::HandleId id,
JS::MutableHandleValue val,
JS::ObjectOpResult &res)
noexcept try
{
assert(&our(c) == cx);
auto &trap(from(obj));
trap.debug("set: %s", string(id).c_str());
val.set(trap.on_set(*obj.get(), id.get(), val));
if(!val.isUndefined())
res.succeed();
return true;
}
catch(const jserror &e)
{
e.set_pending();
return false;
}
catch(const std::exception &e)
{
auto &trap(from(obj));
trap.host_exception("get: '%s': %s",
string(id).c_str(),
e.what());
return false;
}
bool
ircd::js::trap::handle_add(JSContext *const c,
JS::HandleObject obj,
JS::HandleId id,
JS::HandleValue val)
noexcept try
{
assert(&our(c) == cx);
auto &trap(from(obj));
trap.debug("add: %s", string(id).c_str());
trap.on_add(*obj.get(), id.get(), val.get());
return true;
}
catch(const jserror &e)
{
e.set_pending();
return false;
}
catch(const std::exception &e)
{
auto &trap(from(obj));
trap.host_exception("add: '%s': %s",
string(id).c_str(),
e.what());
return false;
}
bool
ircd::js::trap::handle_inst(JSContext *const c,
JS::HandleObject obj,
JS::MutableHandleValue val,
bool *const has_instance)
noexcept try
{
assert(&our(c) == cx);
auto &trap(from(obj));
trap.debug("inst");
return false;
}
catch(const jserror &e)
{
e.set_pending();
return false;
}
catch(const std::exception &e)
{
auto &trap(from(obj));
trap.host_exception("inst: %s", e.what());
return false;
}
void
ircd::js::trap::handle_trace(JSTracer *const tracer,
JSObject *const obj)
noexcept try
{
auto &trap(from(*obj));
trap.debug("trace");
}
catch(const jserror &e)
{
e.set_pending();
return;
}
catch(const std::exception &e)
{
auto &trap(from(*obj));
trap.host_exception("trace: %s", e.what());
return;
}
ircd::js::trap &
ircd::js::trap::from(const JS::HandleObject &o)
{
return from(*o.get());
}
ircd::js::trap &
ircd::js::trap::from(const JSObject &o)
{
auto *const c(JS_GetClass(const_cast<JSObject *>(&o)));
if(!c)
std::terminate(); //TODO: exception
if(!c->reserved[0])
std::terminate(); //TODO: exception
return *static_cast<trap *>(c->reserved[0]); //TODO: ???
}
void
ircd::js::trap::debug(const char *const fmt,
...)
const
{
va_list ap;
va_start(ap, fmt);
char buf[1024];
vsnprintf(buf, sizeof(buf), fmt, ap);
log.debug("trap(%p) \"%s\": %s",
reinterpret_cast<const void *>(this),
name().c_str(),
buf);
va_end(ap);
}
void
ircd::js::trap::host_exception(const char *const fmt,
...)
const
{
va_list ap;
va_start(ap, fmt);
char buf[1024];
vsnprintf(buf, sizeof(buf), fmt, ap);
log.error("trap(%p) \"%s\": %s",
reinterpret_cast<const void *>(this),
name().c_str(),
buf);
JS_ReportError(*cx, "BUG: trap(%p) \"%s\" %s",
reinterpret_cast<const void *>(this),
name().c_str(),
buf);
va_end(ap);
}
bool
ircd::js::trap::on_ctor(const unsigned &argc,
JS::Value &argv)
{
return false;
}
bool
ircd::js::trap::on_call(const unsigned &argc,
JS::Value &argv)
{
return false;
}
bool
ircd::js::trap::on_enu(const JSObject &obj)
{
return false;
}
bool
ircd::js::trap::on_has(const JSObject &obj,
const jsid &id)
{
return false;
}
bool
ircd::js::trap::on_del(const JSObject &obj,
const jsid &id)
{
return false;
}
JS::Value
ircd::js::trap::on_get(const JSObject &obj,
const jsid &id,
const JS::Value &val)
{
return val;
}
JS::Value
ircd::js::trap::on_set(const JSObject &obj,
const jsid &id,
const JS::Value &val)
{
return val;
}
JS::Value
ircd::js::trap::on_add(const JSObject &obj,
const jsid &id,
const JS::Value &val)
{
return val;
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/script.h
//
ircd::js::script::script(const JS::CompileOptions &opts,
const std::string &src)
:JS::Rooted<JSScript *>{*cx}
{
if(!JS::Compile(*cx, opts, src.data(), src.size(), &(*this)))
throw syntax_error("Failed to compile script");
}
ircd::js::value
ircd::js::script::operator()()
const
{
value ret;
if(!JS_ExecuteScript(*cx, *this, &ret))
throw internal_error("Failed to execute script");
return ret;
}
ircd::js::value
ircd::js::script::operator()(JS::AutoObjectVector &stack)
const
{
value ret;
if(!JS_ExecuteScript(*cx, stack, *this, &ret))
throw internal_error("Failed to execute script");
return ret;
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/function.h
//
ircd::js::function::function(JS::AutoObjectVector &stack,
const JS::CompileOptions &opts,
const char *const &name,
const std::vector<std::string> &args,
const std::string &src)
:JS::Rooted<JSFunction *>{*cx}
{
std::vector<const char *> argp(args.size());
std::transform(begin(args), end(args), begin(argp), []
(const std::string &arg)
{
return arg.data();
});
if(!JS::CompileFunction(*cx,
stack,
opts,
name,
argp.size(),
&argp.front(),
src.data(),
src.size(),
&(*this)))
{
throw syntax_error("Failed to compile function");
}
}
ircd::js::value
ircd::js::function::operator()(const object &that)
const
{
return operator()(that, JS::HandleValueArray::empty());
}
ircd::js::value
ircd::js::function::operator()(const object &that,
const JS::HandleValueArray &args)
const
{
value ret;
if(!JS_CallFunction(*cx, that, *this, args, &ret))
throw internal_error("Failed to call Function");
return ret;
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/call.h
//
ircd::js::value
ircd::js::call(const object &obj,
const JS::HandleFunction &func,
const JS::HandleValueArray &args)
{
value ret;
if(!JS_CallFunction(*cx, obj, func, args, &ret))
throw internal_error("Failed to call function");
return ret;
}
ircd::js::value
ircd::js::call(const object &obj,
const JS::HandleValue &val,
const JS::HandleValueArray &args)
{
value ret;
if(!JS_CallFunctionValue(*cx, obj, val, args, &ret))
throw internal_error("Failed to apply function value to object");
return ret;
}
ircd::js::value
ircd::js::call(const object &obj,
const char *const &name,
const JS::HandleValueArray &args)
{
value ret;
if(!JS_CallFunctionName(*cx, obj, name, args, &ret))
throw reference_error("Failed to call function \"%s\"", name);
return ret;
}
ircd::js::value
ircd::js::call(const object &obj,
const std::string &name,
const JS::HandleValueArray &args)
{
return call(obj, name.c_str(), args);
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/string.h
//
const size_t ircd::js::string::CBUFSZ
{
1024
};
const char *
ircd::js::string::c_str()
const
{
static thread_local char cbuf[CBUFS][CBUFSZ];
static thread_local size_t ctr;
char *const buf(cbuf[ctr]);
native(get(), buf, CBUFSZ);
ctr = (ctr + 1) % CBUFS;
return buf;
}
std::u16string
ircd::js::string::convert(const std::string &s)
{
static std::wstring_convert<std::codecvt_utf8<char16_t>, char16_t> converter;
return converter.from_bytes(s);
}
std::u16string
ircd::js::string::convert(const char *const &s)
{
static std::wstring_convert<std::codecvt_utf8<char16_t>, char16_t> converter;
return s? converter.from_bytes(s) : std::u16string{};
}
std::string
ircd::js::string::convert(const std::u16string &s)
{
static std::wstring_convert<std::codecvt_utf8<char16_t>, char16_t> converter;
return converter.to_bytes(s);
}
std::string
ircd::js::string::convert(const char16_t *const &s)
{
static std::wstring_convert<std::codecvt_utf8<char16_t>, char16_t> converter;
return s? converter.to_bytes(s) : std::string{};
}
size_t
ircd::js::string::convert(const char16_t *const &str,
char *const &buf,
const size_t &max)
{
static std::wstring_convert<std::codecvt_utf8<char16_t>, char16_t> converter;
//TODO: optimize
const auto s(converter.to_bytes(str));
return rb_strlcpy(buf, s.c_str(), max);
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/value.h
//
std::string
ircd::js::native(const JSString *const &s)
{
std::string ret(native_size(s) + 1, char());
native(s, &ret.front(), ret.size());
ret.resize(ret.size() - 1);
return ret;
}
size_t
ircd::js::native(const JSString *const &s,
char *const &buf,
const size_t &max)
{
if(unlikely(!max))
return 0;
ssize_t ret(JS_EncodeStringToBuffer(*cx, const_cast<JSString *>(s), buf, max));
ret = std::max(ret, ssize_t(0));
ret = std::min(ret, ssize_t(max - 1));
buf[ret] = '\0';
return ret;
}
size_t
ircd::js::native_size(const JSString *const &s)
{
return JS_GetStringEncodingLength(*cx, const_cast<JSString *>(s));
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/error.h
//
ircd::js::error_handler::error_handler(closure &&handler)
:theirs{rt->error_handler}
,handler{std::move(handler)}
{
rt->error_handler = this;
}
ircd::js::error_handler::error_handler(const closure &handler)
:theirs{rt->error_handler}
,handler{handler}
{
rt->error_handler = this;
}
ircd::js::error_handler::~error_handler()
noexcept
{
assert(rt->error_handler == this);
rt->error_handler = theirs;
}
ircd::js::jserror::jserror(generate_skip_t)
:ircd::js::error(generate_skip)
{
}
ircd::js::jserror::jserror(const char *const fmt,
...)
:ircd::js::error(generate_skip)
{
va_list ap;
va_start(ap, fmt);
generate(JSEXN_ERR, fmt, ap);
va_end(ap);
}
void
ircd::js::jserror::set_pending()
const
{
JS::RootedValue ex(*cx, create_error());
JS_SetPendingException(*cx, ex);
}
JS::Value
ircd::js::jserror::create_error(const JS::HandleObject &stack,
const JS::HandleString &file,
const std::pair<uint, uint> &linecol)
const
{
JS::RootedValue ret(*cx);
JS::RootedString msg(*cx);
const auto type((JSExnType)report.exnType);
const auto &line(linecol.first);
const auto &col(linecol.second);
if(!JS::CreateError(*cx, type, stack, file, line, col, const_cast<JSErrorReport *>(&report), msg, &ret))
throw error("Failed to construct jserror exception!");
return ret;
}
JS::Value
ircd::js::jserror::create_error()
const
{
JS::RootedObject stack(*cx);
JS::RootedString file(*cx);
return create_error(stack, file, {0, 0});
}
void
ircd::js::jserror::generate(const JSExnType &type,
const char *const &fmt,
va_list ap)
{
ircd::exception::generate(fmt, ap);
msg = string::convert(what());
report.ucmessage = msg.c_str();
report.exnType = type;
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/debug.h
//
std::string
ircd::js::debug(const JSErrorReport &r)
{
std::stringstream ss;
if(JSREPORT_IS_WARNING(r.flags))
ss << "WARNING ";
if(JSREPORT_IS_EXCEPTION(r.flags))
ss << "EXCEPTION ";
if(JSREPORT_IS_STRICT(r.flags))
ss << "STRICT ";
if(JSREPORT_IS_STRICT_MODE_ERROR(r.flags))
ss << "STRICT_MODE_ERROR ";
if(r.isMuted)
ss << "MUTED ";
if(r.filename)
ss << "file[" << r.filename << "] ";
if(r.lineno)
ss << "line[" << r.lineno << "] ";
if(r.column)
ss << "col[" << r.column << "] ";
if(r.linebuf())
ss << "code[" << r.linebuf() << "] ";
//if(r.tokenptr)
// ss << "toke[" << r.tokenptr << "] ";
if(r.errorNumber)
ss << "errnum[" << r.errorNumber << "] ";
if(r.exnType)
ss << reflect(JSExnType(r.exnType)) << " ";
if(r.ucmessage)
ss << "\"" << string::convert(r.ucmessage) << "\" ";
for(auto it(r.messageArgs); it && *it; ++it)
ss << "\"" << string::convert(*it) << "\" ";
return ss.str();
}
std::string
ircd::js::debug(const JS::HandleObject &o)
{
std::stringstream ss;
if(JS_IsGlobalObject(o)) ss << "Global ";
if(JS_IsNative(o)) ss << "Native ";
if(JS::IsCallable(o)) ss << "Callable ";
if(JS::IsConstructor(o)) ss << "Constructor ";
bool ret;
if(JS_IsExtensible(*cx, o, &ret) && ret)
ss << "Extensible ";
if(JS_IsArrayObject(*cx, o, &ret) && ret)
ss << "Array ";
return ss.str();
}
std::string
ircd::js::debug(const JS::Value &v)
{
std::stringstream ss;
if(v.isNull()) ss << "Null ";
if(v.isUndefined()) ss << "Undefined ";
if(v.isBoolean()) ss << "Boolean ";
if(v.isTrue()) ss << "TrueValue ";
if(v.isFalse()) ss << "FalseValue ";
if(v.isNumber()) ss << "Number ";
if(v.isDouble()) ss << "Double ";
if(v.isInt32()) ss << "Int32 ";
if(v.isString()) ss << "String ";
if(v.isObject()) ss << "Object ";
if(v.isSymbol()) ss << "Symbol ";
return ss.str();
}
const char *
ircd::js::reflect(const JSFinalizeStatus &s)
{
switch(s)
{
case JSFINALIZE_GROUP_START: return "GROUP_START";
case JSFINALIZE_GROUP_END: return "GROUP_END";
case JSFINALIZE_COLLECTION_END: return "COLLECTION_END";
}
return "????";
}
const char *
ircd::js::reflect(const JSGCStatus &s)
{
switch(s)
{
case JSGC_BEGIN: return "BEGIN";
case JSGC_END: return "END";
}
return "????";
}
const char *
ircd::js::reflect(const JSExnType &e)
{
switch(e)
{
case JSEXN_NONE: return "?NONE?";
case JSEXN_ERR: return "Error";
case JSEXN_INTERNALERR: return "InternalError";
case JSEXN_EVALERR: return "EvalError";
case JSEXN_RANGEERR: return "RangeError";
case JSEXN_REFERENCEERR: return "ReferenceError";
case JSEXN_SYNTAXERR: return "SyntaxError";
case JSEXN_TYPEERR: return "TypeError";
case JSEXN_URIERR: return "URIError";
case JSEXN_LIMIT: return "?LIMIT?";
}
return "????";
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/compartment.h
//
ircd::js::compartment::compartment(JSObject *const &obj)
:compartment(obj, *cx)
{
}
ircd::js::compartment::compartment(JSObject *const &obj,
context &c)
:c{&c}
,prev{JS_EnterCompartment(c, obj)}
,ours{JS_EnterCompartment(c, obj)} // Enter same object compartment again to get its own ptr
,cprev{static_cast<compartment *>(JS_GetCompartmentPrivate(ours))}
{
JS_SetCompartmentPrivate(ours, this);
}
ircd::js::compartment::compartment(compartment &&other)
noexcept
:c{std::move(other.c)}
,prev{std::move(other.prev)}
,ours{std::move(other.ours)}
,cprev{std::move(other.cprev)}
{
JS_SetCompartmentPrivate(ours, this);
other.ours = nullptr;
}
ircd::js::compartment::~compartment()
noexcept
{
// branch not taken on std::move()
if(ours)
{
JS_SetCompartmentPrivate(ours, cprev);
JS_LeaveCompartment(*c, prev);
}
}
void
ircd::js::for_each_compartment_our(const compartment::closure_our &closure)
{
for_each_compartment([&closure]
(JSCompartment *const &c)
{
if(our(c))
closure(*our(c));
});
}
void
ircd::js::for_each_compartment(const compartment::closure &closure)
{
JS_IterateCompartments(*rt,
const_cast<compartment::closure *>(&closure),
compartment::handle_iterate);
}
void
ircd::js::compartment::handle_iterate(JSRuntime *const rt,
void *const priv,
JSCompartment *const c)
noexcept
{
const auto &closure(*static_cast<compartment::closure *>(priv));
closure(c);
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/context.h
//
ircd::js::context::context(JSRuntime *const &runtime,
const struct opts &opts)
:custom_ptr<JSContext>
{
JS_NewContext(runtime, opts.stack_chunk_size),
[opts](JSContext *const ctx) //TODO: old gcc/clang can't copy from opts.dtor_gc
noexcept
{
if(!ctx)
return;
// Free the user's privdata managed object
delete static_cast<const privdata *>(JS_GetSecondContextPrivate(ctx));
if(opts.dtor_gc)
JS_DestroyContext(ctx);
else
JS_DestroyContextNoGC(ctx);
}
}
,opts{opts}
{
assert(&our(runtime) == rt); // Trying to construct on thread without runtime thread_local
// Use their privdata pointer to point to our instance. We can then use our(JSContext*)
// to get back to `this` instance. Remember the pointer must change when this class is
// std::move()'ed etc via the move constructor/assignment.
JS_SetContextPrivate(get(), this);
// Assign the thread_local here.
cx = this;
}
ircd::js::context::context(context &&other)
noexcept
:custom_ptr<JSContext>{std::move(other)}
,opts{std::move(other.opts)}
{
// Branch not taken for null/defaulted instance of JSContext smart ptr
if(!!*this)
JS_SetContextPrivate(get(), this);
// Ensure the thread_local points here now.
cx = this;
}
ircd::js::context &
ircd::js::context::operator=(context &&other)
noexcept
{
static_cast<custom_ptr<JSContext> &>(*this) = std::move(other);
opts = std::move(other.opts);
// Branch not taken for null/defaulted instance of JSContext smart ptr
if(!!*this)
JS_SetContextPrivate(get(), this);
// Ensure the thread_local points here now.
cx = this;
return *this;
}
ircd::js::context::~context()
noexcept
{
// Branch not taken on std::move()
if(!!*this)
cx = nullptr;
}
ircd::js::context::lock::lock()
:lock{*cx}
{
}
ircd::js::context::lock::lock(context &c)
:c{&c}
{
JS_BeginRequest(c);
}
ircd::js::context::lock::~lock()
noexcept
{
JS_EndRequest(*c);
}
///////////////////////////////////////////////////////////////////////////////
//
// ircd/js/runtime.h
//
ircd::js::runtime::runtime(const struct opts &opts)
:custom_ptr<JSRuntime>
{
JS_NewRuntime(opts.maxbytes),
JS_DestroyRuntime
}
,error_handler{nullptr}
,opts{opts}
{
// We use their privdata to find `this` via our(JSRuntime*) function.
// Any additional user privdata will have to ride a member in this class itself.
JS_SetRuntimePrivate(get(), this);
// Assign the thread_local runtime pointer here.
rt = this;
JS_SetErrorReporter(get(), handle_error);
JS::SetOutOfMemoryCallback(get(), handle_out_of_memory, nullptr);
JS::SetLargeAllocationFailureCallback(get(), handle_large_allocation_failure, nullptr);
JS_SetGCCallback(get(), handle_gc, nullptr);
JS_AddFinalizeCallback(get(), handle_finalize, nullptr);
JS_SetCompartmentNameCallback(get(), handle_compartment_name);
JS_SetDestroyCompartmentCallback(get(), handle_compartment_destroy);
JS_SetContextCallback(get(), handle_context, nullptr);
//JS_SetInterruptCallback(get(), nullptr);
JS_SetNativeStackQuota(get(), opts.code_stack_max, opts.trusted_stack_max, opts.untrusted_stack_max);
}
ircd::js::runtime::runtime(runtime &&other)
noexcept
:custom_ptr<JSRuntime>{std::move(other)}
,error_handler{nullptr}
,opts{std::move(other.opts)}
{
// Branch not taken for null/defaulted instance of JSRuntime smart ptr
if(!!*this)
JS_SetRuntimePrivate(get(), this);
// Ensure the thread_local runtime always points here
rt = this;
}
ircd::js::runtime &
ircd::js::runtime::operator=(runtime &&other)
noexcept
{
static_cast<custom_ptr<JSRuntime> &>(*this) = std::move(other);
error_handler = std::move(other.error_handler);
opts = std::move(other.opts);
// Branch not taken for null/defaulted instance of JSRuntime smart ptr
if(!!*this)
JS_SetRuntimePrivate(get(), this);
// Ensure the thread_local runtime always points here
rt = this;
return *this;
}
ircd::js::runtime::~runtime()
noexcept
{
// Branch not taken on std::move()
if(!!*this)
rt = nullptr;
}
bool
ircd::js::runtime::handle_interrupt(JSContext *const ctx)
noexcept
{
auto &runtime(our(ctx).runtime());
JS_SetInterruptCallback(runtime, nullptr);
return false;
}
bool
ircd::js::runtime::handle_context(JSContext *const c,
const uint op,
void *const priv)
noexcept
{
return true;
}
void
ircd::js::runtime::handle_compartment_destroy(JSFreeOp *const fop,
JSCompartment *const compartment)
noexcept
{
}
void
ircd::js::runtime::handle_compartment_name(JSRuntime *const rt,
JSCompartment *const compartment,
char *const buf,
const size_t max)
noexcept
{
}
void
ircd::js::runtime::handle_finalize(JSFreeOp *const fop,
const JSFinalizeStatus status,
const bool is_compartment,
void *const priv)
noexcept
{
log.debug("fop(%p): %s %s",
(const void *)fop,
reflect(status),
is_compartment? "COMPARTMENT" : "");
}
void
ircd::js::runtime::handle_gc(JSRuntime *const rt,
const JSGCStatus status,
void *const priv)
noexcept
{
log.debug("runtime(%p): GC %s",
(const void *)rt,
reflect(status));
}
void
ircd::js::runtime::handle_large_allocation_failure(void *const priv)
noexcept
{
log.error("Large allocation failure");
}
void
ircd::js::runtime::handle_out_of_memory(JSContext *const ctx,
void *const priv)
noexcept
{
log.error("JSContext(%p): out of memory", (const void *)ctx);
}
void
ircd::js::runtime::handle_error(JSContext *const ctx,
const char *const msg,
JSErrorReport *const report)
noexcept
{
if(!rt->error_handler)
{
log.error("Unhandled: JSContext(%p): %s [%s]", (const void *)ctx, msg, debug(*report).c_str());
return;
}
assert(report);
rt->error_handler->handler(msg, *report);
}
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