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//===-- asan_dll_thunk.cc -------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// This file defines a family of thunks that should be statically linked into
// the DLLs that have ASan instrumentation in order to delegate the calls to the
// shared runtime that lives in the main binary.
// See https://code.google.com/p/address-sanitizer/issues/detail?id=209 for the
// details.
//===----------------------------------------------------------------------===//
// Only compile this code when buidling asan_dll_thunk.lib
// Using #ifdef rather than relying on Makefiles etc.
// simplifies the build procedure.
#ifdef ASAN_DLL_THUNK
// ----------------- Helper functions and macros --------------------- {{{1
extern "C" {
void *__stdcall GetModuleHandleA(const char *module_name);
void *__stdcall GetProcAddress(void *module, const char *proc_name);
void abort();
}
static void *getRealProcAddressOrDie(const char *name) {
void *ret = GetProcAddress(GetModuleHandleA(0), name);
if (!ret)
abort();
return ret;
}
#define WRAP_V_V(name) \
extern "C" void name() { \
typedef void (*fntype)(); \
fntype fn = (fntype)getRealProcAddressOrDie(#name); \
fn(); \
}
#define WRAP_V_W(name) \
extern "C" void name(void *arg) { \
typedef void (*fntype)(void *arg); \
fntype fn = (fntype)getRealProcAddressOrDie(#name); \
fn(arg); \
}
#define WRAP_V_WW(name) \
extern "C" void name(void *arg1, void *arg2) { \
typedef void (*fntype)(void *, void *); \
fntype fn = (fntype)getRealProcAddressOrDie(#name); \
fn(arg1, arg2); \
}
#define WRAP_W_W(name) \
extern "C" void *name(void *arg) { \
typedef void *(*fntype)(void *arg); \
fntype fn = (fntype)getRealProcAddressOrDie(#name); \
return fn(arg); \
}
#define WRAP_W_WW(name) \
extern "C" void *name(void *arg1, void *arg2) { \
typedef void *(*fntype)(void *, void *); \
fntype fn = (fntype)getRealProcAddressOrDie(#name); \
return fn(arg1, arg2); \
}
#define WRAP_W_WWW(name) \
extern "C" void *name(void *arg1, void *arg2, void *arg3) { \
typedef void *(*fntype)(void *, void *, void *); \
fntype fn = (fntype)getRealProcAddressOrDie(#name); \
return fn(arg1, arg2, arg3); \
}
#define WRAP_W_WWWW(name) \
extern "C" void *name(void *arg1, void *arg2, void *arg3, void *arg4) { \
typedef void *(*fntype)(void *, void *, void *, void *); \
fntype fn = (fntype)getRealProcAddressOrDie(#name); \
return fn(arg1, arg2, arg3, arg4); \
}
#define WRAP_W_WWWWW(name) \
extern "C" void *name(void *arg1, void *arg2, void *arg3, void *arg4, \
void *arg5) { \
typedef void *(*fntype)(void *, void *, void *, void *, void *); \
fntype fn = (fntype)getRealProcAddressOrDie(#name); \
return fn(arg1, arg2, arg3, arg4, arg5); \
}
#define WRAP_W_WWWWWW(name) \
extern "C" void *name(void *arg1, void *arg2, void *arg3, void *arg4, \
void *arg5, void *arg6) { \
typedef void *(*fntype)(void *, void *, void *, void *, void *, void *); \
fntype fn = (fntype)getRealProcAddressOrDie(#name); \
return fn(arg1, arg2, arg3, arg4, arg5, arg6); \
}
// }}}
// ----------------- ASan own interface functions --------------------
WRAP_V_V(__asan_init_v3)
WRAP_V_W(__asan_report_store1)
WRAP_V_W(__asan_report_store2)
WRAP_V_W(__asan_report_store4)
WRAP_V_W(__asan_report_store8)
WRAP_V_W(__asan_report_store16)
WRAP_V_WW(__asan_report_store_n)
WRAP_V_W(__asan_report_load1)
WRAP_V_W(__asan_report_load2)
WRAP_V_W(__asan_report_load4)
WRAP_V_W(__asan_report_load8)
WRAP_V_W(__asan_report_load16)
WRAP_V_WW(__asan_report_load_n)
WRAP_V_WW(__asan_register_globals)
WRAP_V_WW(__asan_unregister_globals)
// TODO(timurrrr): Add more interface functions on the as-needed basis.
// ----------------- Memory allocation functions ---------------------
WRAP_V_W(free)
WRAP_V_WW(_free_dbg)
WRAP_W_W(malloc)
WRAP_W_WWWW(_malloc_dbg)
WRAP_W_WW(calloc)
WRAP_W_WWWWW(_calloc_dbg)
WRAP_W_WWW(_calloc_impl)
WRAP_W_WW(realloc)
WRAP_W_WWW(_realloc_dbg)
WRAP_W_WWW(_recalloc)
WRAP_W_W(_msize)
// TODO(timurrrr): Do we need to add _Crt* stuff here? (see asan_malloc_win.cc).
#endif // ASAN_DLL_THUNK
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