From 8cb671ee3d027504cb788b803aa9fb538373ab07 Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Fri, 12 Mar 2004 05:27:27 +0000
Subject: [PATCH] add test_threads

---
 stepmania/src/tests/test_threads.cpp | 248 +++++++++++++++++++++++++++
 1 file changed, 248 insertions(+)
 create mode 100644 stepmania/src/tests/test_threads.cpp

diff --git a/stepmania/src/tests/test_threads.cpp b/stepmania/src/tests/test_threads.cpp
new file mode 100644
index 0000000000..549acf1502
--- /dev/null
+++ b/stepmania/src/tests/test_threads.cpp
@@ -0,0 +1,248 @@
+#include "global.h"
+#include "RageLog.h"
+#include "RageUtil.h"
+#include "RageThreads.h"
+#include "archutils/Unix/Backtrace.h"
+#include "archutils/Unix/BacktraceNames.h"
+#include "test_misc.h"
+
+#include <unistd.h>
+#include "archutils/Unix/LinuxThreadHelpers.h"
+
+/* These are volatile, so writes to them aren't optimized. */
+volatile int g_ThreadId = -1;
+volatile int g_Counter = 0;
+volatile bool g_Finish = false;
+
+void TestSuspendIncrLoop()
+{
+	while( !g_Finish )
+		++g_Counter;
+}
+
+int TestSuspendThread( void *p )
+{
+	printf("Test thread started\n");
+
+	g_ThreadId = GetCurrentThreadId();
+	TestSuspendIncrLoop();
+
+	return 0;
+}
+
+void test_suspend_threadid( int ThreadId )
+{
+	/* Wait for g_Counter to increment a bit. */
+	usleep( 100000 );
+	       
+	/* Stop the thread. */
+	SuspendThread( ThreadId );
+
+	int OldCounter = g_Counter;
+
+	/* Wait a while.  g_Counter shouldn't change. */
+	usleep( 100000 );
+
+	ASSERT( g_Counter == OldCounter );
+
+	/* Start it again, and wait. */
+	ResumeThread( ThreadId );
+	usleep( 100000 );
+
+	/* g_Counter should change. */
+	ASSERT( g_Counter != OldCounter );
+
+	/* Stop all other threads. */
+	RageThread::HaltAllThreads();
+
+	OldCounter = g_Counter;
+
+	/* Wait a while.  g_Counter shouldn't change. */
+	usleep( 100000 );
+	ASSERT( g_Counter == OldCounter );
+
+	/* Start it again, and wait. */
+	RageThread::ResumeAllThreads();
+	usleep( 100000 );
+
+	/* g_Counter should change. */
+	ASSERT( g_Counter != OldCounter );
+}
+
+/* Test whether suspending a child thread works. */
+void test_suspend_secondary_thread()
+{
+	ASSERT( !g_Finish );
+	ASSERT( g_ThreadId == -1 );
+
+	RageThread testing;
+	testing.SetName( "TestSuspend" );
+	testing.Create( TestSuspendThread, NULL );
+
+	while( g_ThreadId == -1 )
+		;
+
+	test_suspend_threadid( g_ThreadId );
+	
+	g_Finish = true;
+	testing.Wait();
+	g_Finish = false;
+	g_ThreadId = -1;
+}
+
+int TestSuspendMainThread( void *p )
+{
+	ASSERT( !g_Finish );
+
+	printf("Test thread started\n");
+
+	ASSERT( g_ThreadId != -1 );
+	test_suspend_threadid( g_ThreadId );
+	g_Finish = true;
+
+	return 0;
+}
+
+/* Test whether suspending the main thread works. */
+void test_suspend_main_thread()
+{
+	ASSERT( !g_Finish );
+	ASSERT( g_ThreadId == -1 );
+
+	g_ThreadId = GetCurrentThreadId();
+
+	RageThread testing;
+	testing.SetName( "TestSuspend" );
+	testing.Create( TestSuspendMainThread, NULL );
+
+	TestSuspendIncrLoop();
+
+	testing.Wait();
+	g_Finish = false;
+	g_ThreadId = -1;
+}
+
+/* Run a second function, so we have two symbols to search for. */
+void TestBacktraceThreadLoop() __attribute__ ((noinline));
+void TestBacktraceThreadLoop()
+{
+	g_ThreadId = GetCurrentThreadId();
+	while( !g_Finish )
+		;
+}
+
+int TestBacktraceThread( void *p ) __attribute__ ((noinline));
+int TestBacktraceThread( void *p )
+{
+	TestBacktraceThreadLoop();
+	return 0;
+}
+
+bool test_thread_backtrace( int ThreadId, const void *expect1, const void *expect2 )
+{
+	BacktraceContext ctx;
+	int ret = GetThreadBacktraceContext( ThreadId, &ctx );
+	ASSERT( ret == 0 );
+
+	const void *BacktracePointers[1024];
+	GetBacktrace( BacktracePointers, 1024, &ctx );
+
+	bool bFound1 = false, bFound2 = false;
+	for( int i = 0; BacktracePointers[i]; ++i)
+	{
+		BacktraceNames bn;
+		bn.FromAddr( BacktracePointers[i] );
+
+//		printf("want %p, %p: %p, %p\n", expect1, expect2, bn.Address-bn.Offset, BacktracePointers[i] );
+//		printf("     %s\n", bn.Format().c_str() );
+
+		/* bn.Address is the current address; Offset is the distance to the beginning
+		 * of the symbol, so bn.Address-bn.Offset is the actual symbol. */
+		if( bn.Address-bn.Offset == (int) expect1 )
+			bFound1 = true;
+		if( bn.Address-bn.Offset == (int) expect2 )
+			bFound2 = true;
+	}
+
+	return bFound1 && bFound2;
+}
+
+void test_backtracing_secondary_thread()
+{
+	ASSERT( !g_Finish );
+
+	RageThread testing;
+	testing.SetName( "TestBacktrace" );
+	testing.Create( TestBacktraceThread, NULL );
+
+	while( g_ThreadId == -1 )
+		;
+	
+	if( !test_thread_backtrace( g_ThreadId, (void *) TestBacktraceThread, (void *) TestBacktraceThreadLoop ) )
+	{
+		printf( "test_backtracing_secondary_thread failed\n" );
+		exit( 1 );
+	}
+
+	g_Finish = true;
+	testing.Wait();
+	g_Finish = false;
+	g_ThreadId = -1;
+}
+
+int TestBacktraceMainThread( void *p )
+{
+	printf("Test thread started\n");
+
+	while( g_ThreadId == -1 )
+		;
+	
+	if( !test_thread_backtrace( g_ThreadId, (void *) TestBacktraceThread, (void *) TestBacktraceThreadLoop ) )
+	{
+		printf( "test_backtracing_main_thread failed\n" );
+		exit( 1 );
+	}
+
+	g_Finish = true;
+
+	return 0;
+}
+
+void test_backtracing_main_thread()
+{
+	ASSERT( !g_Finish );
+	ASSERT( g_ThreadId == -1 );
+
+	RageThread testing;
+	testing.SetName( "TestBacktrace" );
+	testing.Create( TestBacktraceMainThread, NULL );
+
+	TestBacktraceThread( NULL );
+
+	testing.Wait();
+	g_Finish = false;
+	g_ThreadId = -1;
+}
+
+int main( int argc, char *argv[] )
+{
+	test_handle_args( argc, argv );
+
+	test_init();
+
+	InitializeBacktrace();
+	printf("'%s'\n", ThreadsVersion().c_str());
+
+	/* Test the main thread suspending a secondary thread, and vice versa. */
+	test_suspend_secondary_thread();
+	test_suspend_main_thread();
+	
+	/* Test the main thread backtracing a secondary thread, and vice versa. */
+	test_backtracing_secondary_thread();
+	test_backtracing_main_thread();
+
+	test_deinit();
+
+	exit(0);
+}
+