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[tests] Resolve old TODOs in ASan unit tests. 

llvm-svn: 261713
This commit is contained in:
Alexey Samsonov 2016-02-24 00:41:29 +00:00
parent 5ac589171d
commit 0dc3d24d5d
2 changed files with 32 additions and 15 deletions
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44
compiler-rt/lib/asan/tests/asan_str_test.cc
View File

@ -20,10 +20,31 @@
static char global_string[] = "global";
static size_t global_string_length = 6;
const char kStackReadUnderflow[] = "READ.*underflows this variable";
const char kStackReadOverflow[] = "READ.*overflows this variable";
namespace {
enum class OOBKind {
Heap,
Stack,
Global,
};
string LeftOOBReadMessage(OOBKind oob_kind, int oob_distance) {
return oob_kind == OOBKind::Stack ? kStackReadUnderflow
: ::LeftOOBReadMessage(oob_distance);
}
string RightOOBReadMessage(OOBKind oob_kind, int oob_distance) {
return oob_kind == OOBKind::Stack ? kStackReadOverflow
: ::RightOOBReadMessage(oob_distance);
}
} // namespace
// Input to a test is a zero-terminated string str with given length
// Accesses to the bytes to the left and to the right of str
// are presumed to produce OOB errors
void StrLenOOBTestTemplate(char *str, size_t length, bool is_global) {
void StrLenOOBTestTemplate(char *str, size_t length, OOBKind oob_kind) {
// Normal strlen calls
EXPECT_EQ(strlen(str), length);
if (length > 0) {
@ -31,17 +52,18 @@ void StrLenOOBTestTemplate(char *str, size_t length, bool is_global) {
EXPECT_EQ(0U, strlen(str + length));
}
// Arg of strlen is not malloced, OOB access
if (!is_global) {
if (oob_kind != OOBKind::Global) {
// We don't insert RedZones to the left of global variables
EXPECT_DEATH(Ident(strlen(str - 1)), LeftOOBReadMessage(1));
EXPECT_DEATH(Ident(strlen(str - 5)), LeftOOBReadMessage(5));
EXPECT_DEATH(Ident(strlen(str - 1)), LeftOOBReadMessage(oob_kind, 1));
EXPECT_DEATH(Ident(strlen(str - 5)), LeftOOBReadMessage(oob_kind, 5));
}
EXPECT_DEATH(Ident(strlen(str + length + 1)), RightOOBReadMessage(0));
EXPECT_DEATH(Ident(strlen(str + length + 1)),
RightOOBReadMessage(oob_kind, 0));
// Overwrite terminator
str[length] = 'a';
// String is not zero-terminated, strlen will lead to OOB access
EXPECT_DEATH(Ident(strlen(str)), RightOOBReadMessage(0));
EXPECT_DEATH(Ident(strlen(str + length)), RightOOBReadMessage(0));
EXPECT_DEATH(Ident(strlen(str)), RightOOBReadMessage(oob_kind, 0));
EXPECT_DEATH(Ident(strlen(str + length)), RightOOBReadMessage(oob_kind, 0));
// Restore terminator
str[length] = 0;
}
@ -57,11 +79,9 @@ TEST(AddressSanitizer, StrLenOOBTest) {
}
heap_string[length] = 0;
stack_string[length] = 0;
StrLenOOBTestTemplate(heap_string, length, false);
// TODO(samsonov): Fix expected messages in StrLenOOBTestTemplate to
// make test for stack_string work. Or move it to output tests.
// StrLenOOBTestTemplate(stack_string, length, false);
StrLenOOBTestTemplate(global_string, global_string_length, true);
StrLenOOBTestTemplate(heap_string, length, OOBKind::Heap);
StrLenOOBTestTemplate(stack_string, length, OOBKind::Stack);
StrLenOOBTestTemplate(global_string, global_string_length, OOBKind::Global);
free(heap_string);
}

3
compiler-rt/lib/asan/tests/asan_test.cc
View File

@ -809,9 +809,6 @@ TEST(AddressSanitizer, DISABLED_MemIntrinsicUnalignedAccessTest) {
free(s);
}
// TODO(samsonov): Add a test with malloc(0)
// TODO(samsonov): Add tests for str* and mem* functions.
NOINLINE static int LargeFunction(bool do_bad_access) {
int *x = new int[100];
x[0]++;