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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* SpiderMonkey initialization and shutdown code. */
#include "js/Initialization.h"
#include "mozilla/Assertions.h"
#include <ctype.h>
#include "jstypes.h"
#include "builtin/AtomicsObject.h"
#include "ds/MemoryProtectionExceptionHandler.h"
#include "gc/Statistics.h"
#include "jit/ExecutableAllocator.h"
#include "jit/Ion.h"
#include "js/Utility.h"
#include "unicode/uclean.h"
#include "unicode/utypes.h"
#include "vm/DateTime.h"
#include "vm/HelperThreads.h"
#include "vm/Runtime.h"
#include "vm/Time.h"
#include "vm/TraceLogging.h"
#include "wasm/WasmInstance.h"
using JS::detail::InitState;
using JS::detail::libraryInitState;
using js::FutexRuntime;
InitState JS::detail::libraryInitState;
#ifdef DEBUG
static unsigned
MessageParameterCount(const char* format)
{
unsigned numfmtspecs = 0;
for (const char* fmt = format; *fmt != '\0'; fmt++) {
if (*fmt == '{' && isdigit(fmt[1]))
++numfmtspecs;
}
return numfmtspecs;
}
static void
CheckMessageParameterCounts()
{
// Assert that each message format has the correct number of braced
// parameters.
# define MSG_DEF(name, count, exception, format) \
MOZ_ASSERT(MessageParameterCount(format) == count);
# include "js.msg"
# undef MSG_DEF
}
#endif /* DEBUG */
#define RETURN_IF_FAIL(code) do { if (!code) return #code " failed"; } while (0)
JS_PUBLIC_API(const char*)
JS::detail::InitWithFailureDiagnostic(bool isDebugBuild)
{
// Verify that our DEBUG setting matches the caller's.
#ifdef DEBUG
MOZ_RELEASE_ASSERT(isDebugBuild);
#else
MOZ_RELEASE_ASSERT(!isDebugBuild);
#endif
MOZ_ASSERT(libraryInitState == InitState::Uninitialized,
"must call JS_Init once before any JSAPI operation except "
"JS_SetICUMemoryFunctions");
MOZ_ASSERT(!JSRuntime::hasLiveRuntimes(),
"how do we have live runtimes before JS_Init?");
PRMJ_NowInit();
// The first invocation of `ProcessCreation` creates a temporary thread
// and crashes if that fails, i.e. because we're out of memory. To prevent
// that from happening at some later time, get it out of the way during
// startup.
bool ignored;
mozilla::TimeStamp::ProcessCreation(ignored);
#ifdef DEBUG
CheckMessageParameterCounts();
#endif
using js::TlsPerThreadData;
RETURN_IF_FAIL(TlsPerThreadData.init());
#if defined(DEBUG) || defined(JS_OOM_BREAKPOINT)
RETURN_IF_FAIL(js::oom::InitThreadType());
js::oom::SetThreadType(js::oom::THREAD_TYPE_MAIN);
#endif
RETURN_IF_FAIL(js::Mutex::Init());
RETURN_IF_FAIL(js::wasm::InitInstanceStaticData());
js::gc::InitMemorySubsystem(); // Ensure gc::SystemPageSize() works.
RETURN_IF_FAIL(js::jit::InitProcessExecutableMemory());
MOZ_ALWAYS_TRUE(js::MemoryProtectionExceptionHandler::install());
RETURN_IF_FAIL(js::jit::InitializeIon());
js::DateTimeInfo::init();
UErrorCode err = U_ZERO_ERROR;
u_init(&err);
if (U_FAILURE(err))
return "u_init() failed";
RETURN_IF_FAIL(js::CreateHelperThreadsState());
RETURN_IF_FAIL(FutexRuntime::initialize());
RETURN_IF_FAIL(js::gcstats::Statistics::initialize());
libraryInitState = InitState::Running;
return nullptr;
}
#undef RETURN_IF_FAIL
JS_PUBLIC_API(void)
JS_ShutDown(void)
{
MOZ_ASSERT(libraryInitState == InitState::Running,
"JS_ShutDown must only be called after JS_Init and can't race with it");
#ifdef DEBUG
if (JSRuntime::hasLiveRuntimes()) {
// Gecko is too buggy to assert this just yet.
fprintf(stderr,
"WARNING: YOU ARE LEAKING THE WORLD (at least one JSRuntime "
"and everything alive inside it, that is) AT JS_ShutDown "
"TIME. FIX THIS!\n");
}
#endif
FutexRuntime::destroy();
js::DestroyHelperThreadsState();
#ifdef JS_TRACE_LOGGING
js::DestroyTraceLoggerThreadState();
js::DestroyTraceLoggerGraphState();
#endif
js::MemoryProtectionExceptionHandler::uninstall();
js::wasm::ShutDownInstanceStaticData();
js::Mutex::ShutDown();
// The only difficult-to-address reason for the restriction that you can't
// call JS_Init/stuff/JS_ShutDown multiple times is the Windows PRMJ
// NowInit initialization code, which uses PR_CallOnce to initialize the
// PRMJ_Now subsystem. (For reinitialization to be permitted, we'd need to
// "reset" the called-once status -- doable, but more trouble than it's
// worth now.) Initializing that subsystem from JS_Init eliminates the
// problem, but initialization can take a comparatively long time (15ms or
// so), so we really don't want to do it in JS_Init, and we really do want
// to do it only when PRMJ_Now is eventually called.
PRMJ_NowShutdown();
u_cleanup();
if (!JSRuntime::hasLiveRuntimes())
js::jit::ReleaseProcessExecutableMemory();
libraryInitState = InitState::ShutDown;
}
JS_PUBLIC_API(bool)
JS_SetICUMemoryFunctions(JS_ICUAllocFn allocFn, JS_ICUReallocFn reallocFn, JS_ICUFreeFn freeFn)
{
MOZ_ASSERT(libraryInitState == InitState::Uninitialized,
"must call JS_SetICUMemoryFunctions before any other JSAPI "
"operation (including JS_Init)");
UErrorCode status = U_ZERO_ERROR;
u_setMemoryFunctions(/* context = */ nullptr, allocFn, reallocFn, freeFn, &status);
return U_SUCCESS(status);
}
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