talk/base/latebindingsymboltable_unittest.cc

/*
 * libjingle
 * Copyright 2010, Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * 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,
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 */

#ifdef LINUX
#include <math.h>
#endif

#include "talk/base/gunit.h"
#include "talk/base/latebindingsymboltable.h"

namespace talk_base {

#ifdef LINUX

// Some libm symbols for our test.
#define LIBM_SYMBOLS_LIST \
  X(acos) \
  X(sin) \
  X(tan)

LATE_BINDING_SYMBOL_TABLE_DECLARE_BEGIN(LibmTestSymbolTable)
#define X(sym) \
    LATE_BINDING_SYMBOL_TABLE_DECLARE_ENTRY(LibmTestSymbolTable, sym)
LIBM_SYMBOLS_LIST
#undef X
LATE_BINDING_SYMBOL_TABLE_DECLARE_END(LibmTestSymbolTable)

LATE_BINDING_SYMBOL_TABLE_DEFINE_BEGIN(LibmTestSymbolTable, "libm.so.6")
#define X(sym) \
    LATE_BINDING_SYMBOL_TABLE_DEFINE_ENTRY(LibmTestSymbolTable, sym)
LIBM_SYMBOLS_LIST
#undef X
LATE_BINDING_SYMBOL_TABLE_DEFINE_END(LibmTestSymbolTable)

#define LATE(sym) \
  LATESYM_GET(LibmTestSymbolTable, &table, sym)

TEST(LateBindingSymbolTable, libm) {
  LibmTestSymbolTable table;
  EXPECT_FALSE(table.IsLoaded());
  ASSERT_TRUE(table.Load());
  EXPECT_TRUE(table.IsLoaded());
  EXPECT_EQ(LATE(acos)(0.5), acos(0.5));
  EXPECT_EQ(LATE(sin)(0.5), sin(0.5));
  EXPECT_EQ(LATE(tan)(0.5), tan(0.5));
  // It would be nice to check that the addresses are the same, but the nature
  // of dynamic linking and relocation makes them actually be different.
  table.Unload();
  EXPECT_FALSE(table.IsLoaded());
}

#else
#error Not implemented
#endif

}  // namespace talk_base