mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-26 22:32:46 +00:00
356 lines
11 KiB
C++
356 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
|
|
* 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/. */
|
|
|
|
#include "storage_test_harness.h"
|
|
#include "prthread.h"
|
|
#include "nsIEventTarget.h"
|
|
#include "nsIInterfaceRequestorUtils.h"
|
|
|
|
#include "sqlite3.h"
|
|
|
|
#include "mozilla/ReentrantMonitor.h"
|
|
|
|
using mozilla::ReentrantMonitor;
|
|
using mozilla::ReentrantMonitorAutoEnter;
|
|
|
|
/**
|
|
* Verify that mozIStorageAsyncStatement's life-cycle never triggers a mutex on
|
|
* the caller (generally main) thread. We do this by decorating the sqlite
|
|
* mutex logic with our own code that checks what thread it is being invoked on
|
|
* and sets a flag if it is invoked on the main thread. We are able to easily
|
|
* decorate the SQLite mutex logic because SQLite allows us to retrieve the
|
|
* current function pointers being used and then provide a new set.
|
|
*/
|
|
|
|
/* ===== Mutex Watching ===== */
|
|
|
|
sqlite3_mutex_methods orig_mutex_methods;
|
|
sqlite3_mutex_methods wrapped_mutex_methods;
|
|
|
|
bool mutex_used_on_watched_thread = false;
|
|
PRThread *watched_thread = nullptr;
|
|
/**
|
|
* Ugly hack to let us figure out what a connection's async thread is. If we
|
|
* were MOZILLA_INTERNAL_API and linked as such we could just include
|
|
* mozStorageConnection.h and just ask Connection directly. But that turns out
|
|
* poorly.
|
|
*
|
|
* When the thread a mutex is invoked on isn't watched_thread we save it to this
|
|
* variable.
|
|
*/
|
|
PRThread *last_non_watched_thread = nullptr;
|
|
|
|
/**
|
|
* Set a flag if the mutex is used on the thread we are watching, but always
|
|
* call the real mutex function.
|
|
*/
|
|
extern "C" void wrapped_MutexEnter(sqlite3_mutex *mutex)
|
|
{
|
|
PRThread *curThread = ::PR_GetCurrentThread();
|
|
if (curThread == watched_thread)
|
|
mutex_used_on_watched_thread = true;
|
|
else
|
|
last_non_watched_thread = curThread;
|
|
orig_mutex_methods.xMutexEnter(mutex);
|
|
}
|
|
|
|
extern "C" int wrapped_MutexTry(sqlite3_mutex *mutex)
|
|
{
|
|
if (::PR_GetCurrentThread() == watched_thread)
|
|
mutex_used_on_watched_thread = true;
|
|
return orig_mutex_methods.xMutexTry(mutex);
|
|
}
|
|
|
|
|
|
#define do_check_ok(aInvoc) do_check_true((aInvoc) == SQLITE_OK)
|
|
|
|
void hook_sqlite_mutex()
|
|
{
|
|
// We need to initialize and teardown SQLite to get it to set up the
|
|
// default mutex handlers for us so we can steal them and wrap them.
|
|
do_check_ok(sqlite3_initialize());
|
|
do_check_ok(sqlite3_shutdown());
|
|
do_check_ok(::sqlite3_config(SQLITE_CONFIG_GETMUTEX, &orig_mutex_methods));
|
|
do_check_ok(::sqlite3_config(SQLITE_CONFIG_GETMUTEX, &wrapped_mutex_methods));
|
|
wrapped_mutex_methods.xMutexEnter = wrapped_MutexEnter;
|
|
wrapped_mutex_methods.xMutexTry = wrapped_MutexTry;
|
|
do_check_ok(::sqlite3_config(SQLITE_CONFIG_MUTEX, &wrapped_mutex_methods));
|
|
}
|
|
|
|
/**
|
|
* Call to clear the watch state and to set the watching against this thread.
|
|
*
|
|
* Check |mutex_used_on_watched_thread| to see if the mutex has fired since
|
|
* this method was last called. Since we're talking about the current thread,
|
|
* there are no race issues to be concerned about
|
|
*/
|
|
void watch_for_mutex_use_on_this_thread()
|
|
{
|
|
watched_thread = ::PR_GetCurrentThread();
|
|
mutex_used_on_watched_thread = false;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//// Thread Wedgers
|
|
|
|
/**
|
|
* A runnable that blocks until code on another thread invokes its unwedge
|
|
* method. By dispatching this to a thread you can ensure that no subsequent
|
|
* runnables dispatched to the thread will execute until you invoke unwedge.
|
|
*
|
|
* The wedger is self-dispatching, just construct it with its target.
|
|
*/
|
|
class ThreadWedger : public nsRunnable
|
|
{
|
|
public:
|
|
ThreadWedger(nsIEventTarget *aTarget)
|
|
: mReentrantMonitor("thread wedger")
|
|
, unwedged(false)
|
|
{
|
|
aTarget->Dispatch(this, aTarget->NS_DISPATCH_NORMAL);
|
|
}
|
|
|
|
NS_IMETHOD Run()
|
|
{
|
|
ReentrantMonitorAutoEnter automon(mReentrantMonitor);
|
|
|
|
if (!unwedged)
|
|
automon.Wait();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void unwedge()
|
|
{
|
|
ReentrantMonitorAutoEnter automon(mReentrantMonitor);
|
|
unwedged = true;
|
|
automon.Notify();
|
|
}
|
|
|
|
private:
|
|
ReentrantMonitor mReentrantMonitor;
|
|
bool unwedged;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//// Async Helpers
|
|
|
|
/**
|
|
* A horrible hack to figure out what the connection's async thread is. By
|
|
* creating a statement and async dispatching we can tell from the mutex who
|
|
* is the async thread, PRThread style. Then we map that to an nsIThread.
|
|
*/
|
|
already_AddRefed<nsIThread>
|
|
get_conn_async_thread(mozIStorageConnection *db)
|
|
{
|
|
// Make sure we are tracking the current thread as the watched thread
|
|
watch_for_mutex_use_on_this_thread();
|
|
|
|
// - statement with nothing to bind
|
|
nsCOMPtr<mozIStorageAsyncStatement> stmt;
|
|
db->CreateAsyncStatement(
|
|
NS_LITERAL_CSTRING("SELECT 1"),
|
|
getter_AddRefs(stmt));
|
|
blocking_async_execute(stmt);
|
|
stmt->Finalize();
|
|
|
|
nsCOMPtr<nsIThreadManager> threadMan =
|
|
do_GetService("@mozilla.org/thread-manager;1");
|
|
nsCOMPtr<nsIThread> asyncThread;
|
|
threadMan->GetThreadFromPRThread(last_non_watched_thread,
|
|
getter_AddRefs(asyncThread));
|
|
|
|
// Additionally, check that the thread we get as the background thread is the
|
|
// same one as the one we report from getInterface.
|
|
nsCOMPtr<nsIEventTarget> target = do_GetInterface(db);
|
|
nsCOMPtr<nsIThread> allegedAsyncThread = do_QueryInterface(target);
|
|
PRThread *allegedPRThread;
|
|
(void)allegedAsyncThread->GetPRThread(&allegedPRThread);
|
|
do_check_eq(allegedPRThread, last_non_watched_thread);
|
|
return asyncThread.forget();
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//// Tests
|
|
|
|
void
|
|
test_TrueAsyncStatement()
|
|
{
|
|
// (only the first test needs to call this)
|
|
hook_sqlite_mutex();
|
|
|
|
nsCOMPtr<mozIStorageConnection> db(getMemoryDatabase());
|
|
|
|
// Start watching for forbidden mutex usage.
|
|
watch_for_mutex_use_on_this_thread();
|
|
|
|
// - statement with nothing to bind
|
|
nsCOMPtr<mozIStorageAsyncStatement> stmt;
|
|
db->CreateAsyncStatement(
|
|
NS_LITERAL_CSTRING("CREATE TABLE test (id INTEGER PRIMARY KEY)"),
|
|
getter_AddRefs(stmt)
|
|
);
|
|
blocking_async_execute(stmt);
|
|
stmt->Finalize();
|
|
do_check_false(mutex_used_on_watched_thread);
|
|
|
|
// - statement with something to bind ordinally
|
|
db->CreateAsyncStatement(
|
|
NS_LITERAL_CSTRING("INSERT INTO test (id) VALUES (?)"),
|
|
getter_AddRefs(stmt)
|
|
);
|
|
stmt->BindInt32ByIndex(0, 1);
|
|
blocking_async_execute(stmt);
|
|
stmt->Finalize();
|
|
do_check_false(mutex_used_on_watched_thread);
|
|
|
|
// - statement with something to bind by name
|
|
db->CreateAsyncStatement(
|
|
NS_LITERAL_CSTRING("INSERT INTO test (id) VALUES (:id)"),
|
|
getter_AddRefs(stmt)
|
|
);
|
|
nsCOMPtr<mozIStorageBindingParamsArray> paramsArray;
|
|
stmt->NewBindingParamsArray(getter_AddRefs(paramsArray));
|
|
nsCOMPtr<mozIStorageBindingParams> params;
|
|
paramsArray->NewBindingParams(getter_AddRefs(params));
|
|
params->BindInt32ByName(NS_LITERAL_CSTRING("id"), 2);
|
|
paramsArray->AddParams(params);
|
|
params = nullptr;
|
|
stmt->BindParameters(paramsArray);
|
|
paramsArray = nullptr;
|
|
blocking_async_execute(stmt);
|
|
stmt->Finalize();
|
|
do_check_false(mutex_used_on_watched_thread);
|
|
|
|
// - now, make sure creating a sync statement does trigger our guard.
|
|
// (If this doesn't happen, our test is bunk and it's important to know that.)
|
|
nsCOMPtr<mozIStorageStatement> syncStmt;
|
|
db->CreateStatement(NS_LITERAL_CSTRING("SELECT * FROM test"),
|
|
getter_AddRefs(syncStmt));
|
|
syncStmt->Finalize();
|
|
do_check_true(mutex_used_on_watched_thread);
|
|
|
|
blocking_async_close(db);
|
|
}
|
|
|
|
/**
|
|
* Test that cancellation before a statement is run successfully stops the
|
|
* statement from executing.
|
|
*/
|
|
void
|
|
test_AsyncCancellation()
|
|
{
|
|
nsCOMPtr<mozIStorageConnection> db(getMemoryDatabase());
|
|
|
|
// -- wedge the thread
|
|
nsCOMPtr<nsIThread> target(get_conn_async_thread(db));
|
|
do_check_true(target);
|
|
nsRefPtr<ThreadWedger> wedger (new ThreadWedger(target));
|
|
|
|
// -- create statements and cancel them
|
|
// - async
|
|
nsCOMPtr<mozIStorageAsyncStatement> asyncStmt;
|
|
db->CreateAsyncStatement(
|
|
NS_LITERAL_CSTRING("CREATE TABLE asyncTable (id INTEGER PRIMARY KEY)"),
|
|
getter_AddRefs(asyncStmt)
|
|
);
|
|
|
|
nsRefPtr<AsyncStatementSpinner> asyncSpin(new AsyncStatementSpinner());
|
|
nsCOMPtr<mozIStoragePendingStatement> asyncPend;
|
|
(void)asyncStmt->ExecuteAsync(asyncSpin, getter_AddRefs(asyncPend));
|
|
do_check_true(asyncPend);
|
|
asyncPend->Cancel();
|
|
|
|
// - sync
|
|
nsCOMPtr<mozIStorageStatement> syncStmt;
|
|
db->CreateStatement(
|
|
NS_LITERAL_CSTRING("CREATE TABLE syncTable (id INTEGER PRIMARY KEY)"),
|
|
getter_AddRefs(syncStmt)
|
|
);
|
|
|
|
nsRefPtr<AsyncStatementSpinner> syncSpin(new AsyncStatementSpinner());
|
|
nsCOMPtr<mozIStoragePendingStatement> syncPend;
|
|
(void)syncStmt->ExecuteAsync(syncSpin, getter_AddRefs(syncPend));
|
|
do_check_true(syncPend);
|
|
syncPend->Cancel();
|
|
|
|
// -- unwedge the async thread
|
|
wedger->unwedge();
|
|
|
|
// -- verify that both statements report they were canceled
|
|
asyncSpin->SpinUntilCompleted();
|
|
do_check_true(asyncSpin->completionReason ==
|
|
mozIStorageStatementCallback::REASON_CANCELED);
|
|
|
|
syncSpin->SpinUntilCompleted();
|
|
do_check_true(syncSpin->completionReason ==
|
|
mozIStorageStatementCallback::REASON_CANCELED);
|
|
|
|
// -- verify that neither statement constructed their tables
|
|
nsresult rv;
|
|
bool exists;
|
|
rv = db->TableExists(NS_LITERAL_CSTRING("asyncTable"), &exists);
|
|
do_check_true(rv == NS_OK);
|
|
do_check_false(exists);
|
|
rv = db->TableExists(NS_LITERAL_CSTRING("syncTable"), &exists);
|
|
do_check_true(rv == NS_OK);
|
|
do_check_false(exists);
|
|
|
|
// -- cleanup
|
|
asyncStmt->Finalize();
|
|
syncStmt->Finalize();
|
|
blocking_async_close(db);
|
|
}
|
|
|
|
/**
|
|
* Test that the destructor for an asynchronous statement which has a
|
|
* sqlite3_stmt will dispatch that statement to the async thread for
|
|
* finalization rather than trying to finalize it on the main thread
|
|
* (and thereby running afoul of our mutex use detector).
|
|
*/
|
|
void test_AsyncDestructorFinalizesOnAsyncThread()
|
|
{
|
|
// test_TrueAsyncStatement called hook_sqlite_mutex() for us
|
|
|
|
nsCOMPtr<mozIStorageConnection> db(getMemoryDatabase());
|
|
watch_for_mutex_use_on_this_thread();
|
|
|
|
// -- create an async statement
|
|
nsCOMPtr<mozIStorageAsyncStatement> stmt;
|
|
db->CreateAsyncStatement(
|
|
NS_LITERAL_CSTRING("CREATE TABLE test (id INTEGER PRIMARY KEY)"),
|
|
getter_AddRefs(stmt)
|
|
);
|
|
|
|
// -- execute it so it gets a sqlite3_stmt that needs to be finalized
|
|
blocking_async_execute(stmt);
|
|
do_check_false(mutex_used_on_watched_thread);
|
|
|
|
// -- forget our reference
|
|
stmt = nullptr;
|
|
|
|
// -- verify the mutex was not touched
|
|
do_check_false(mutex_used_on_watched_thread);
|
|
|
|
// -- make sure the statement actually gets finalized / cleanup
|
|
// the close will assert if we failed to finalize!
|
|
blocking_async_close(db);
|
|
}
|
|
|
|
void (*gTests[])(void) = {
|
|
// this test must be first because it hooks the mutex mechanics
|
|
test_TrueAsyncStatement,
|
|
test_AsyncCancellation,
|
|
test_AsyncDestructorFinalizesOnAsyncThread
|
|
};
|
|
|
|
const char *file = __FILE__;
|
|
#define TEST_NAME "true async statement"
|
|
#define TEST_FILE file
|
|
#include "storage_test_harness_tail.h"
|