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[ASan Win] Simplify and improve the way we forward ASan interface calls from DLLs 

Reviewed at http://reviews.llvm.org/D3848

llvm-svn: 209210
This commit is contained in:
Timur Iskhodzhanov 2014-05-20 14:26:19 +00:00
parent 981ba24156
commit e7894f3b14
8 changed files with 122 additions and 60 deletions
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1
compiler-rt/lib/asan/CMakeLists.txt
View File

@ -181,6 +181,7 @@ else()
if (WIN32)
add_compiler_rt_runtime(clang_rt.asan_dll_thunk-${arch} ${arch} STATIC
SOURCES asan_dll_thunk.cc
$<TARGET_OBJECTS:RTInterception.${arch}>
CFLAGS ${ASAN_CFLAGS} -DASAN_DLL_THUNK
DEFS ${ASAN_COMMON_DEFINITIONS})
add_dependencies(asan clang_rt.asan_dll_thunk-${arch})

149
compiler-rt/lib/asan/asan_dll_thunk.cc
View File

@ -20,6 +20,7 @@
// Using #ifdef rather than relying on Makefiles etc.
// simplifies the build procedure.
#ifdef ASAN_DLL_THUNK
#include "sanitizer_common/sanitizer_interception.h"
// ----------------- Helper functions and macros --------------------- {{{1
extern "C" {
@ -115,7 +116,50 @@ static void *getRealProcAddressOrDie(const char *name) {
}
// }}}
// --------- Interface interception helper functions and macros ----------- {{{1
// We need to intercept the ASan interface exported by the DLL thunk and forward
// all the functions to the runtime in the main module.
// However, we don't want to keep two lists of interface functions.
// To avoid that, the list of interface functions should be defined using the
// INTERFACE_FUNCTION macro. Then, all the interface can be intercepted at once
// by calling INTERCEPT_ASAN_INTERFACE().
// Use macro+template magic to automatically generate the list of interface
// functions. Each interface function at line LINE defines a template class
// with a static InterfaceInteceptor<LINE>::Execute() method intercepting the
// function. The default implementation of InterfaceInteceptor<LINE> is to call
// the Execute() method corresponding to the previous line.
template<int LINE>
struct InterfaceInteceptor {
static void Execute() { InterfaceInteceptor<LINE-1>::Execute(); }
};
// There shouldn't be any interface function with negative line number.
template<>
struct InterfaceInteceptor<0> {
static void Execute() {}
};
#define INTERFACE_FUNCTION(name) \
extern "C" void name() { __debugbreak(); } \
template<> struct InterfaceInteceptor<__LINE__> { \
static void Execute() { \
void *wrapper = getRealProcAddressOrDie(#name); \
if (!__interception::OverrideFunction((uptr)name, (uptr)wrapper, 0)) \
abort(); \
InterfaceInteceptor<__LINE__-1>::Execute(); \
} \
};
// INTERCEPT_ASAN_INTERFACE must be used after the last INTERFACE_FUNCTION.
#define INTERCEPT_ASAN_INTERFACE InterfaceInteceptor<__LINE__>::Execute
static void InterceptASanInterface();
// }}}
// ----------------- ASan own interface functions --------------------
// Don't use the INTERFACE_FUNCTION machinery for this function as we actually
// want to call it in the __asan_init interceptor.
WRAP_W_V(__asan_should_detect_stack_use_after_return)
extern "C" {
@ -125,70 +169,75 @@ extern "C" {
// __asan_option_detect_stack_use_after_return afterwards.
void __asan_init_v3() {
typedef void (*fntype)();
static fntype fn = (fntype)getRealProcAddressOrDie("__asan_init_v3");
static fntype fn = 0;
if (fn) return;
fn = (fntype)getRealProcAddressOrDie("__asan_init_v3");
fn();
__asan_option_detect_stack_use_after_return =
(__asan_should_detect_stack_use_after_return() != 0);
InterceptASanInterface();
}
}
WRAP_V_V(__asan_handle_no_return)
INTERFACE_FUNCTION(__asan_handle_no_return)
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)
INTERFACE_FUNCTION(__asan_report_store1)
INTERFACE_FUNCTION(__asan_report_store2)
INTERFACE_FUNCTION(__asan_report_store4)
INTERFACE_FUNCTION(__asan_report_store8)
INTERFACE_FUNCTION(__asan_report_store16)
INTERFACE_FUNCTION(__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)
INTERFACE_FUNCTION(__asan_report_load1)
INTERFACE_FUNCTION(__asan_report_load2)
INTERFACE_FUNCTION(__asan_report_load4)
INTERFACE_FUNCTION(__asan_report_load8)
INTERFACE_FUNCTION(__asan_report_load16)
INTERFACE_FUNCTION(__asan_report_load_n)
WRAP_W_WWW(__asan_memcpy);
WRAP_W_WWW(__asan_memset);
WRAP_W_WWW(__asan_memmove);
INTERFACE_FUNCTION(__asan_memcpy);
INTERFACE_FUNCTION(__asan_memset);
INTERFACE_FUNCTION(__asan_memmove);
WRAP_V_WW(__asan_register_globals)
WRAP_V_WW(__asan_unregister_globals)
INTERFACE_FUNCTION(__asan_register_globals)
INTERFACE_FUNCTION(__asan_unregister_globals)
WRAP_V_W(__asan_before_dynamic_init)
WRAP_V_V(__asan_after_dynamic_init)
INTERFACE_FUNCTION(__asan_before_dynamic_init)
INTERFACE_FUNCTION(__asan_after_dynamic_init)
WRAP_V_WW(__asan_poison_stack_memory)
WRAP_V_WW(__asan_unpoison_stack_memory)
INTERFACE_FUNCTION(__asan_poison_stack_memory)
INTERFACE_FUNCTION(__asan_unpoison_stack_memory)
WRAP_V_WW(__asan_poison_memory_region)
WRAP_V_WW(__asan_unpoison_memory_region)
INTERFACE_FUNCTION(__asan_poison_memory_region)
INTERFACE_FUNCTION(__asan_unpoison_memory_region)
WRAP_W_V(__asan_get_current_fake_stack)
WRAP_W_WWWW(__asan_addr_is_in_fake_stack)
INTERFACE_FUNCTION(__asan_get_current_fake_stack)
INTERFACE_FUNCTION(__asan_addr_is_in_fake_stack)
WRAP_W_WW(__asan_stack_malloc_0)
WRAP_W_WW(__asan_stack_malloc_1)
WRAP_W_WW(__asan_stack_malloc_2)
WRAP_W_WW(__asan_stack_malloc_3)
WRAP_W_WW(__asan_stack_malloc_4)
WRAP_W_WW(__asan_stack_malloc_5)
WRAP_W_WW(__asan_stack_malloc_6)
WRAP_W_WW(__asan_stack_malloc_7)
WRAP_W_WW(__asan_stack_malloc_8)
WRAP_W_WW(__asan_stack_malloc_9)
WRAP_W_WW(__asan_stack_malloc_10)
INTERFACE_FUNCTION(__asan_stack_malloc_0)
INTERFACE_FUNCTION(__asan_stack_malloc_1)
INTERFACE_FUNCTION(__asan_stack_malloc_2)
INTERFACE_FUNCTION(__asan_stack_malloc_3)
INTERFACE_FUNCTION(__asan_stack_malloc_4)
INTERFACE_FUNCTION(__asan_stack_malloc_5)
INTERFACE_FUNCTION(__asan_stack_malloc_6)
INTERFACE_FUNCTION(__asan_stack_malloc_7)
INTERFACE_FUNCTION(__asan_stack_malloc_8)
INTERFACE_FUNCTION(__asan_stack_malloc_9)
INTERFACE_FUNCTION(__asan_stack_malloc_10)
WRAP_V_WWW(__asan_stack_free_0)
WRAP_V_WWW(__asan_stack_free_1)
WRAP_V_WWW(__asan_stack_free_2)
WRAP_V_WWW(__asan_stack_free_4)
WRAP_V_WWW(__asan_stack_free_5)
WRAP_V_WWW(__asan_stack_free_6)
WRAP_V_WWW(__asan_stack_free_7)
WRAP_V_WWW(__asan_stack_free_8)
WRAP_V_WWW(__asan_stack_free_9)
WRAP_V_WWW(__asan_stack_free_10)
INTERFACE_FUNCTION(__asan_stack_free_0)
INTERFACE_FUNCTION(__asan_stack_free_1)
INTERFACE_FUNCTION(__asan_stack_free_2)
INTERFACE_FUNCTION(__asan_stack_free_4)
INTERFACE_FUNCTION(__asan_stack_free_5)
INTERFACE_FUNCTION(__asan_stack_free_6)
INTERFACE_FUNCTION(__asan_stack_free_7)
INTERFACE_FUNCTION(__asan_stack_free_8)
INTERFACE_FUNCTION(__asan_stack_free_9)
INTERFACE_FUNCTION(__asan_stack_free_10)
// TODO(timurrrr): Add more interface functions on the as-needed basis.
@ -216,4 +265,8 @@ WRAP_W_W(_expand_dbg)
// TODO(timurrrr): Do we need to add _Crt* stuff here? (see asan_malloc_win.cc).
void InterceptASanInterface() {
INTERCEPT_ASAN_INTERFACE();
}
#endif // ASAN_DLL_THUNK

5
compiler-rt/test/asan/TestCases/Windows/dll_malloc_left_oob.cc
View File

@ -10,12 +10,13 @@ int test_function() {
buffer[-1] = 42;
// CHECK: AddressSanitizer: heap-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
// CHECK: WRITE of size 1 at [[ADDR]] thread T0
// CHECK: test_function {{.*}}dll_malloc_left_oob.cc:[[@LINE-3]]
// CHECK-NEXT: test_function {{.*}}dll_malloc_left_oob.cc:[[@LINE-3]]
// CHECK-NEXT: main {{.*}}dll_host.cc
//
// CHECK: [[ADDR]] is located 1 bytes to the left of 42-byte region
// CHECK-LABEL: allocated by thread T0 here:
// CHECK: malloc
// CHECK: test_function {{.*}}dll_malloc_left_oob.cc:[[@LINE-9]]
// CHECK: test_function {{.*}}dll_malloc_left_oob.cc:[[@LINE-10]]
// CHECK-NEXT: main {{.*}}dll_host.cc
// CHECK-LABEL: SUMMARY
free(buffer);

12
compiler-rt/test/asan/TestCases/Windows/dll_malloc_uaf.cc
View File

@ -7,21 +7,23 @@
extern "C" __declspec(dllexport)
int test_function() {
char *buffer = (char*)malloc(42);
int *buffer = (int*)malloc(42);
free(buffer);
buffer[0] = 42;
// CHECK: AddressSanitizer: heap-use-after-free on address [[ADDR:0x[0-9a-f]+]]
// CHECK: WRITE of size 1 at [[ADDR]] thread T0
// CHECK: test_function {{.*}}dll_malloc_uaf.cc:[[@LINE-3]]
// CHECK: WRITE of size 4 at [[ADDR]] thread T0
// CHECK-NEXT: test_function {{.*}}dll_malloc_uaf.cc:[[@LINE-3]]
// CHECK-NEXT: main {{.*}}dll_host
//
// CHECK: [[ADDR]] is located 0 bytes inside of 42-byte region
// CHECK-LABEL: freed by thread T0 here:
// CHECK: free
// CHECK: test_function {{.*}}dll_malloc_uaf.cc:[[@LINE-9]]
// CHECK: test_function {{.*}}dll_malloc_uaf.cc:[[@LINE-10]]
// CHECK-NEXT: main {{.*}}dll_host
//
// CHECK-LABEL: previously allocated by thread T0 here:
// CHECK: malloc
// CHECK: test_function {{.*}}dll_malloc_uaf.cc:[[@LINE-14]]
// CHECK: test_function {{.*}}dll_malloc_uaf.cc:[[@LINE-16]]
// CHECK-NEXT: main {{.*}}dll_host
return 0;
}

3
compiler-rt/test/asan/TestCases/Windows/dll_noreturn.cc
View File

@ -12,9 +12,10 @@ void noreturn_f() {
_exit(1);
// CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
// CHECK: WRITE of size 1 at [[ADDR]] thread T0
// CHECK: noreturn_f {{.*}}dll_noreturn.cc:[[@LINE-4]]
// CHECK-NEXT: noreturn_f {{.*}}dll_noreturn.cc:[[@LINE-4]]
// CHECK-NEXT: test_function {{.*}}dll_noreturn.cc
// CHECK-NEXT: main {{.*}}dll_host.cc
//
// CHECK: Address [[ADDR]] is located in stack of thread T0 at offset [[OFFSET:.*]] in frame
// CHECK-NEXT: noreturn_f {{.*}}dll_noreturn.cc
// CHECK: 'buffer' <== Memory access at offset [[OFFSET]] underflows this variable

3
compiler-rt/test/asan/TestCases/Windows/dll_poison_unpoison.cc
View File

@ -25,9 +25,10 @@ int test_function() {
should_crash(&buffer[96]);
// CHECK: AddressSanitizer: use-after-poison on address [[ADDR:0x[0-9a-f]+]]
// CHECK-NEXT: WRITE of size 1 at [[ADDR]] thread T0
// CHECK: should_crash {{.*}}\dll_poison_unpoison.cc
// CHECK-NEXT: should_crash {{.*}}\dll_poison_unpoison.cc
// CHECK-NEXT: test_function {{.*}}\dll_poison_unpoison.cc:[[@LINE-4]]
// CHECK-NEXT: main
//
// CHECK: [[ADDR]] is located in stack of thread T0 at offset [[OFFSET:.*]] in frame
// CHECK-NEXT: test_function {{.*}}\dll_poison_unpoison.cc
// CHECK: 'buffer' <== Memory access at offset [[OFFSET]] is inside this variable

3
compiler-rt/test/asan/TestCases/Windows/dll_stack_use_after_return.cc
View File

@ -18,8 +18,9 @@ int test_function() {
*x = 42;
// CHECK: AddressSanitizer: stack-use-after-return
// CHECK: WRITE of size 1 at [[ADDR:.*]] thread T0
// CHECK: test_function {{.*}}dll_stack_use_after_return.cc:[[@LINE-3]]
// CHECK-NEXT: test_function {{.*}}dll_stack_use_after_return.cc:[[@LINE-3]]
// CHECK-NEXT: main
//
// CHECK: Address [[ADDR]] is located in stack of thread T0 at offset [[OFFSET:.*]] in frame
// CHECK-NEXT: #0 {{.*}} foo {{.*}}dll_stack_use_after_return.cc
// CHECK: 'stack_buffer' <== Memory access at offset [[OFFSET]] is inside this variable

6
compiler-rt/test/asan/TestCases/Windows/dll_thread_stack_array_left_oob.cc
View File

@ -12,9 +12,11 @@ DWORD WINAPI thread_proc(void *context) {
stack_buffer[subscript] = 42;
// CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
// CHECK: WRITE of size 1 at [[ADDR]] thread T1
// CHECK: thread_proc {{.*}}dll_thread_stack_array_left_oob.cc:[[@LINE-3]]
// CHECK-NEXT: thread_proc {{.*}}dll_thread_stack_array_left_oob.cc:[[@LINE-3]]
//
// CHECK: Address [[ADDR]] is located in stack of thread T1 at offset [[OFFSET:.*]] in frame
// CHECK: thread_proc {{.*}}dll_thread_stack_array_left_oob.cc
// CHECK-NEXT: thread_proc {{.*}}dll_thread_stack_array_left_oob.cc
//
// CHECK: 'stack_buffer' <== Memory access at offset [[OFFSET]] underflows this variable
return 0;