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Implement AddressSanitizer suppressions. 

Adds 3 new suppression types, "interceptor_name", "interceptor_via_fun", "interceptor_via_lib".

Reviewed at http://reviews.llvm.org/D6280.

llvm-svn: 223508
This commit is contained in:
Kuba Brecka 2014-12-05 20:26:09 +00:00
parent 8c728ae9fb
commit dde00302c7
12 changed files with 402 additions and 77 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
compiler-rt/lib/asan/CMakeLists.txt
View File

@ -18,6 +18,7 @@ set(ASAN_SOURCES
asan_rtl.cc
asan_stack.cc
asan_stats.cc
asan_suppressions.cc
asan_thread.cc
asan_win.cc)

221
compiler-rt/lib/asan/asan_interceptors.cc
View File

@ -20,6 +20,7 @@
#include "asan_report.h"
#include "asan_stack.h"
#include "asan_stats.h"
#include "asan_suppressions.h"
#include "sanitizer_common/sanitizer_libc.h"
namespace __asan {
@ -34,12 +35,16 @@ static inline bool QuickCheckForUnpoisonedRegion(uptr beg, uptr size) {
return false;
}
struct AsanInterceptorContext {
const char *interceptor_name;
};
// We implement ACCESS_MEMORY_RANGE, ASAN_READ_RANGE,
// and ASAN_WRITE_RANGE as macro instead of function so
// that no extra frames are created, and stack trace contains
// relevant information only.
// We check all shadow bytes.
#define ACCESS_MEMORY_RANGE(offset, size, isWrite) do { \
#define ACCESS_MEMORY_RANGE(ctx, offset, size, isWrite) do { \
uptr __offset = (uptr)(offset); \
uptr __size = (uptr)(size); \
uptr __bad = 0; \
@ -49,13 +54,26 @@ static inline bool QuickCheckForUnpoisonedRegion(uptr beg, uptr size) {
} \
if (!QuickCheckForUnpoisonedRegion(__offset, __size) && \
(__bad = __asan_region_is_poisoned(__offset, __size))) { \
GET_CURRENT_PC_BP_SP; \
__asan_report_error(pc, bp, sp, __bad, isWrite, __size); \
AsanInterceptorContext *_ctx = (AsanInterceptorContext *)ctx; \
bool suppressed = false; \
if (_ctx) { \
suppressed = IsInterceptorSuppressed(_ctx->interceptor_name); \
if (!suppressed && HaveStackTraceBasedSuppressions()) { \
GET_STACK_TRACE_FATAL_HERE; \
suppressed = IsStackTraceSuppressed(&stack); \
} \
} \
if (!suppressed) { \
GET_CURRENT_PC_BP_SP; \
__asan_report_error(pc, bp, sp, __bad, isWrite, __size); \
} \
} \
} while (0)
#define ASAN_READ_RANGE(offset, size) ACCESS_MEMORY_RANGE(offset, size, false)
#define ASAN_WRITE_RANGE(offset, size) ACCESS_MEMORY_RANGE(offset, size, true)
#define ASAN_READ_RANGE(ctx, offset, size) \
ACCESS_MEMORY_RANGE(ctx, offset, size, false)
#define ASAN_WRITE_RANGE(ctx, offset, size) \
ACCESS_MEMORY_RANGE(ctx, offset, size, true)
// Behavior of functions like "memcpy" or "strcpy" is undefined
// if memory intervals overlap. We report error in this case.
@ -113,16 +131,21 @@ DECLARE_REAL_AND_INTERCEPTOR(void, free, void *)
#define ASAN_INTERCEPT_FUNC(name)
#endif // SANITIZER_MAC
#define ASAN_INTERCEPTOR_ENTER(ctx, func) \
AsanInterceptorContext _ctx = {#func}; \
ctx = (void *)&_ctx; \
(void) ctx; \
#define COMMON_INTERCEPT_FUNCTION(name) ASAN_INTERCEPT_FUNC(name)
#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
ASAN_WRITE_RANGE(ptr, size)
#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) ASAN_READ_RANGE(ptr, size)
ASAN_WRITE_RANGE(ctx, ptr, size)
#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \
ASAN_READ_RANGE(ctx, ptr, size)
#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \
do { \
if (asan_init_is_running) \
return REAL(func)(__VA_ARGS__); \
ctx = 0; \
(void) ctx; \
ASAN_INTERCEPTOR_ENTER(ctx, func); \
if (SANITIZER_MAC && UNLIKELY(!asan_inited)) \
return REAL(func)(__VA_ARGS__); \
ENSURE_ASAN_INITED(); \
@ -151,8 +174,10 @@ DECLARE_REAL_AND_INTERCEPTOR(void, free, void *)
#define COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED (!asan_inited)
#include "sanitizer_common/sanitizer_common_interceptors.inc"
#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) ASAN_READ_RANGE(p, s)
#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) ASAN_WRITE_RANGE(p, s)
// Syscall interceptors don't have contexts, we don't support suppressions
// for them.
#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) ASAN_READ_RANGE(nullptr, p, s)
#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) ASAN_WRITE_RANGE(nullptr, p, s)
#define COMMON_SYSCALL_POST_READ_RANGE(p, s) \
do { \
(void)(p); \
@ -347,14 +372,16 @@ static inline int CharCmp(unsigned char c1, unsigned char c2) {
}
INTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, memcmp);
if (UNLIKELY(!asan_inited)) return internal_memcmp(a1, a2, size);
ENSURE_ASAN_INITED();
if (flags()->replace_intrin) {
if (flags()->strict_memcmp) {
// Check the entire regions even if the first bytes of the buffers are
// different.
ASAN_READ_RANGE(a1, size);
ASAN_READ_RANGE(a2, size);
ASAN_READ_RANGE(ctx, a1, size);
ASAN_READ_RANGE(ctx, a2, size);
// Fallthrough to REAL(memcmp) below.
} else {
unsigned char c1 = 0, c2 = 0;
@ -366,65 +393,81 @@ INTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) {
c2 = s2[i];
if (c1 != c2) break;
}
ASAN_READ_RANGE(s1, Min(i + 1, size));
ASAN_READ_RANGE(s2, Min(i + 1, size));
ASAN_READ_RANGE(ctx, s1, Min(i + 1, size));
ASAN_READ_RANGE(ctx, s2, Min(i + 1, size));
return CharCmp(c1, c2);
}
}
return REAL(memcmp(a1, a2, size));
}
// memcpy is called during __asan_init() from the internals of printf(...).
// We do not treat memcpy with to==from as a bug.
// See http://llvm.org/bugs/show_bug.cgi?id=11763.
#define ASAN_MEMCPY_IMPL(ctx, to, from, size) do { \
if (UNLIKELY(!asan_inited)) return internal_memcpy(to, from, size); \
if (asan_init_is_running) { \
return REAL(memcpy)(to, from, size); \
} \
ENSURE_ASAN_INITED(); \
if (flags()->replace_intrin) { \
if (to != from) { \
CHECK_RANGES_OVERLAP("memcpy", to, size, from, size); \
} \
ASAN_READ_RANGE(ctx, from, size); \
ASAN_WRITE_RANGE(ctx, to, size); \
} \
return REAL(memcpy)(to, from, size); \
} while (0)
void *__asan_memcpy(void *to, const void *from, uptr size) {
if (UNLIKELY(!asan_inited)) return internal_memcpy(to, from, size);
// memcpy is called during __asan_init() from the internals
// of printf(...).
if (asan_init_is_running) {
return REAL(memcpy)(to, from, size);
}
ENSURE_ASAN_INITED();
if (flags()->replace_intrin) {
if (to != from) {
// We do not treat memcpy with to==from as a bug.
// See http://llvm.org/bugs/show_bug.cgi?id=11763.
CHECK_RANGES_OVERLAP("memcpy", to, size, from, size);
}
ASAN_READ_RANGE(from, size);
ASAN_WRITE_RANGE(to, size);
}
return REAL(memcpy)(to, from, size);
ASAN_MEMCPY_IMPL(nullptr, to, from, size);
}
// memset is called inside Printf.
#define ASAN_MEMSET_IMPL(ctx, block, c, size) do { \
if (UNLIKELY(!asan_inited)) return internal_memset(block, c, size); \
if (asan_init_is_running) { \
return REAL(memset)(block, c, size); \
} \
ENSURE_ASAN_INITED(); \
if (flags()->replace_intrin) { \
ASAN_WRITE_RANGE(ctx, block, size); \
} \
return REAL(memset)(block, c, size); \
} while (0)
void *__asan_memset(void *block, int c, uptr size) {
if (UNLIKELY(!asan_inited)) return internal_memset(block, c, size);
// memset is called inside Printf.
if (asan_init_is_running) {
return REAL(memset)(block, c, size);
}
ENSURE_ASAN_INITED();
if (flags()->replace_intrin) {
ASAN_WRITE_RANGE(block, size);
}
return REAL(memset)(block, c, size);
ASAN_MEMSET_IMPL(nullptr, block, c, size);
}
#define ASAN_MEMMOVE_IMPL(ctx, to, from, size) do { \
if (UNLIKELY(!asan_inited)) \
return internal_memmove(to, from, size); \
ENSURE_ASAN_INITED(); \
if (flags()->replace_intrin) { \
ASAN_READ_RANGE(ctx, from, size); \
ASAN_WRITE_RANGE(ctx, to, size); \
} \
return internal_memmove(to, from, size); \
} while (0)
void *__asan_memmove(void *to, const void *from, uptr size) {
if (UNLIKELY(!asan_inited))
return internal_memmove(to, from, size);
ENSURE_ASAN_INITED();
if (flags()->replace_intrin) {
ASAN_READ_RANGE(from, size);
ASAN_WRITE_RANGE(to, size);
}
return internal_memmove(to, from, size);
ASAN_MEMMOVE_IMPL(nullptr, to, from, size);
}
INTERCEPTOR(void*, memmove, void *to, const void *from, uptr size) {
return __asan_memmove(to, from, size);
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, memmove);
ASAN_MEMMOVE_IMPL(ctx, to, from, size);
}
INTERCEPTOR(void*, memcpy, void *to, const void *from, uptr size) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, memcpy);
#if !SANITIZER_MAC
return __asan_memcpy(to, from, size);
ASAN_MEMCPY_IMPL(ctx, to, from, size);
#else
// At least on 10.7 and 10.8 both memcpy() and memmove() are being replaced
// with WRAP(memcpy). As a result, false positives are reported for memmove()
@ -432,15 +475,19 @@ INTERCEPTOR(void*, memcpy, void *to, const void *from, uptr size) {
// ASAN_OPTIONS=replace_intrin=0, memmove() is still replaced with
// internal_memcpy(), which may lead to crashes, see
// http://llvm.org/bugs/show_bug.cgi?id=16362.
return __asan_memmove(to, from, size);
ASAN_MEMMOVE_IMPL(ctx, to, from, size);
#endif // !SANITIZER_MAC
}
INTERCEPTOR(void*, memset, void *block, int c, uptr size) {
return __asan_memset(block, c, size);
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, memset);
ASAN_MEMSET_IMPL(ctx, block, c, size);
}
INTERCEPTOR(char*, strchr, const char *str, int c) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strchr);
if (UNLIKELY(!asan_inited)) return internal_strchr(str, c);
// strchr is called inside create_purgeable_zone() when MallocGuardEdges=1 is
// used.
@ -451,7 +498,7 @@ INTERCEPTOR(char*, strchr, const char *str, int c) {
char *result = REAL(strchr)(str, c);
if (flags()->replace_str) {
uptr bytes_read = (result ? result - str : REAL(strlen)(str)) + 1;
ASAN_READ_RANGE(str, bytes_read);
ASAN_READ_RANGE(ctx, str, bytes_read);
}
return result;
}
@ -473,13 +520,15 @@ DEFINE_REAL(char*, index, const char *string, int c)
// For both strcat() and strncat() we need to check the validity of |to|
// argument irrespective of the |from| length.
INTERCEPTOR(char*, strcat, char *to, const char *from) { // NOLINT
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strcat); // NOLINT
ENSURE_ASAN_INITED();
if (flags()->replace_str) {
uptr from_length = REAL(strlen)(from);
ASAN_READ_RANGE(from, from_length + 1);
ASAN_READ_RANGE(ctx, from, from_length + 1);
uptr to_length = REAL(strlen)(to);
ASAN_READ_RANGE(to, to_length);
ASAN_WRITE_RANGE(to + to_length, from_length + 1);
ASAN_READ_RANGE(ctx, to, to_length);
ASAN_WRITE_RANGE(ctx, to + to_length, from_length + 1);
// If the copying actually happens, the |from| string should not overlap
// with the resulting string starting at |to|, which has a length of
// to_length + from_length + 1.
@ -492,14 +541,16 @@ INTERCEPTOR(char*, strcat, char *to, const char *from) { // NOLINT
}
INTERCEPTOR(char*, strncat, char *to, const char *from, uptr size) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strncat);
ENSURE_ASAN_INITED();
if (flags()->replace_str) {
uptr from_length = MaybeRealStrnlen(from, size);
uptr copy_length = Min(size, from_length + 1);
ASAN_READ_RANGE(from, copy_length);
ASAN_READ_RANGE(ctx, from, copy_length);
uptr to_length = REAL(strlen)(to);
ASAN_READ_RANGE(to, to_length);
ASAN_WRITE_RANGE(to + to_length, from_length + 1);
ASAN_READ_RANGE(ctx, to, to_length);
ASAN_WRITE_RANGE(ctx, to + to_length, from_length + 1);
if (from_length > 0) {
CHECK_RANGES_OVERLAP("strncat", to, to_length + copy_length + 1,
from, copy_length);
@ -509,6 +560,8 @@ INTERCEPTOR(char*, strncat, char *to, const char *from, uptr size) {
}
INTERCEPTOR(char*, strcpy, char *to, const char *from) { // NOLINT
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strcpy); // NOLINT
#if SANITIZER_MAC
if (UNLIKELY(!asan_inited)) return REAL(strcpy)(to, from); // NOLINT
#endif
@ -521,19 +574,21 @@ INTERCEPTOR(char*, strcpy, char *to, const char *from) { // NOLINT
if (flags()->replace_str) {
uptr from_size = REAL(strlen)(from) + 1;
CHECK_RANGES_OVERLAP("strcpy", to, from_size, from, from_size);
ASAN_READ_RANGE(from, from_size);
ASAN_WRITE_RANGE(to, from_size);
ASAN_READ_RANGE(ctx, from, from_size);
ASAN_WRITE_RANGE(ctx, to, from_size);
}
return REAL(strcpy)(to, from); // NOLINT
}
#if ASAN_INTERCEPT_STRDUP
INTERCEPTOR(char*, strdup, const char *s) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strdup);
if (UNLIKELY(!asan_inited)) return internal_strdup(s);
ENSURE_ASAN_INITED();
uptr length = REAL(strlen)(s);
if (flags()->replace_str) {
ASAN_READ_RANGE(s, length + 1);
ASAN_READ_RANGE(ctx, s, length + 1);
}
GET_STACK_TRACE_MALLOC;
void *new_mem = asan_malloc(length + 1, &stack);
@ -543,6 +598,8 @@ INTERCEPTOR(char*, strdup, const char *s) {
#endif
INTERCEPTOR(SIZE_T, strlen, const char *s) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strlen);
if (UNLIKELY(!asan_inited)) return internal_strlen(s);
// strlen is called from malloc_default_purgeable_zone()
// in __asan::ReplaceSystemAlloc() on Mac.
@ -552,37 +609,43 @@ INTERCEPTOR(SIZE_T, strlen, const char *s) {
ENSURE_ASAN_INITED();
SIZE_T length = REAL(strlen)(s);
if (flags()->replace_str) {
ASAN_READ_RANGE(s, length + 1);
ASAN_READ_RANGE(ctx, s, length + 1);
}
return length;
}
INTERCEPTOR(SIZE_T, wcslen, const wchar_t *s) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, wcslen);
SIZE_T length = REAL(wcslen)(s);
if (!asan_init_is_running) {
ENSURE_ASAN_INITED();
ASAN_READ_RANGE(s, (length + 1) * sizeof(wchar_t));
ASAN_READ_RANGE(ctx, s, (length + 1) * sizeof(wchar_t));
}
return length;
}
INTERCEPTOR(char*, strncpy, char *to, const char *from, uptr size) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strncpy);
ENSURE_ASAN_INITED();
if (flags()->replace_str) {
uptr from_size = Min(size, MaybeRealStrnlen(from, size) + 1);
CHECK_RANGES_OVERLAP("strncpy", to, from_size, from, from_size);
ASAN_READ_RANGE(from, from_size);
ASAN_WRITE_RANGE(to, size);
ASAN_READ_RANGE(ctx, from, from_size);
ASAN_WRITE_RANGE(ctx, to, size);
}
return REAL(strncpy)(to, from, size);
}
#if ASAN_INTERCEPT_STRNLEN
INTERCEPTOR(uptr, strnlen, const char *s, uptr maxlen) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strnlen);
ENSURE_ASAN_INITED();
uptr length = REAL(strnlen)(s, maxlen);
if (flags()->replace_str) {
ASAN_READ_RANGE(s, Min(length + 1, maxlen));
ASAN_READ_RANGE(ctx, s, Min(length + 1, maxlen));
}
return length;
}
@ -607,6 +670,8 @@ static inline void FixRealStrtolEndptr(const char *nptr, char **endptr) {
INTERCEPTOR(long, strtol, const char *nptr, // NOLINT
char **endptr, int base) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strtol);
ENSURE_ASAN_INITED();
if (!flags()->replace_str) {
return REAL(strtol)(nptr, endptr, base);
@ -618,12 +683,14 @@ INTERCEPTOR(long, strtol, const char *nptr, // NOLINT
}
if (IsValidStrtolBase(base)) {
FixRealStrtolEndptr(nptr, &real_endptr);
ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1);
ASAN_READ_RANGE(ctx, nptr, (real_endptr - nptr) + 1);
}
return result;
}
INTERCEPTOR(int, atoi, const char *nptr) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, atoi);
#if SANITIZER_MAC
if (UNLIKELY(!asan_inited)) return REAL(atoi)(nptr);
#endif
@ -638,11 +705,13 @@ INTERCEPTOR(int, atoi, const char *nptr) {
// different from int). So, we just imitate this behavior.
int result = REAL(strtol)(nptr, &real_endptr, 10);
FixRealStrtolEndptr(nptr, &real_endptr);
ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1);
ASAN_READ_RANGE(ctx, nptr, (real_endptr - nptr) + 1);
return result;
}
INTERCEPTOR(long, atol, const char *nptr) { // NOLINT
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, atol);
#if SANITIZER_MAC
if (UNLIKELY(!asan_inited)) return REAL(atol)(nptr);
#endif
@ -653,13 +722,15 @@ INTERCEPTOR(long, atol, const char *nptr) { // NOLINT
char *real_endptr;
long result = REAL(strtol)(nptr, &real_endptr, 10); // NOLINT
FixRealStrtolEndptr(nptr, &real_endptr);
ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1);
ASAN_READ_RANGE(ctx, nptr, (real_endptr - nptr) + 1);
return result;
}
#if ASAN_INTERCEPT_ATOLL_AND_STRTOLL
INTERCEPTOR(long long, strtoll, const char *nptr, // NOLINT
char **endptr, int base) {
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, strtoll);
ENSURE_ASAN_INITED();
if (!flags()->replace_str) {
return REAL(strtoll)(nptr, endptr, base);
@ -674,12 +745,14 @@ INTERCEPTOR(long long, strtoll, const char *nptr, // NOLINT
// if base is valid.
if (IsValidStrtolBase(base)) {
FixRealStrtolEndptr(nptr, &real_endptr);
ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1);
ASAN_READ_RANGE(ctx, nptr, (real_endptr - nptr) + 1);
}
return result;
}
INTERCEPTOR(long long, atoll, const char *nptr) { // NOLINT
void *ctx;
ASAN_INTERCEPTOR_ENTER(ctx, atoll);
ENSURE_ASAN_INITED();
if (!flags()->replace_str) {
return REAL(atoll)(nptr);
@ -687,7 +760,7 @@ INTERCEPTOR(long long, atoll, const char *nptr) { // NOLINT
char *real_endptr;
long long result = REAL(strtoll)(nptr, &real_endptr, 10); // NOLINT
FixRealStrtolEndptr(nptr, &real_endptr);
ASAN_READ_RANGE(nptr, (real_endptr - nptr) + 1);
ASAN_READ_RANGE(ctx, nptr, (real_endptr - nptr) + 1);
return result;
}
#endif // ASAN_INTERCEPT_ATOLL_AND_STRTOLL

3
compiler-rt/lib/asan/asan_rtl.cc
View File

@ -21,6 +21,7 @@
#include "asan_report.h"
#include "asan_stack.h"
#include "asan_stats.h"
#include "asan_suppressions.h"
#include "asan_thread.h"
#include "sanitizer_common/sanitizer_atomic.h"
#include "sanitizer_common/sanitizer_flags.h"
@ -691,6 +692,8 @@ static void AsanInitInternal() {
}
#endif // CAN_SANITIZE_LEAKS
InitializeSuppressions();
VReport(1, "AddressSanitizer Init done\n");
}

87
compiler-rt/lib/asan/asan_suppressions.cc Normal file
View File

@ -0,0 +1,87 @@
//===-- asan_suppressions.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.
//
// Issue suppression and suppression-related functions.
//===----------------------------------------------------------------------===//
#include "asan_suppressions.h"
#include "asan_stack.h"
#include "sanitizer_common/sanitizer_suppressions.h"
#include "sanitizer_common/sanitizer_symbolizer.h"
namespace __asan {
static bool suppressions_inited = false;
void InitializeSuppressions() {
CHECK(!suppressions_inited);
SuppressionContext::InitIfNecessary();
suppressions_inited = true;
}
bool IsInterceptorSuppressed(const char *interceptor_name) {
CHECK(suppressions_inited);
SuppressionContext *ctx = SuppressionContext::Get();
Suppression *s;
// Match "interceptor_name" suppressions.
return ctx->Match(interceptor_name, SuppressionInterceptorName, &s);
}
bool HaveStackTraceBasedSuppressions() {
CHECK(suppressions_inited);
SuppressionContext *ctx = SuppressionContext::Get();
return ctx->HasSuppressionType(SuppressionInterceptorViaFunction) ||
ctx->HasSuppressionType(SuppressionInterceptorViaLibrary);
}
bool IsStackTraceSuppressed(const StackTrace *stack) {
CHECK(suppressions_inited);
if (!HaveStackTraceBasedSuppressions())
return false;
SuppressionContext *ctx = SuppressionContext::Get();
Symbolizer *symbolizer = Symbolizer::GetOrInit();
Suppression *s;
for (uptr i = 0; i < stack->size && stack->trace[i]; i++) {
uptr addr = stack->trace[i];
if (ctx->HasSuppressionType(SuppressionInterceptorViaLibrary)) {
const char *module_name;
uptr module_offset;
// Match "interceptor_via_lib" suppressions.
if (symbolizer->GetModuleNameAndOffsetForPC(addr, &module_name,
&module_offset) &&
ctx->Match(module_name, SuppressionInterceptorViaLibrary, &s)) {
return true;
}
}
if (ctx->HasSuppressionType(SuppressionInterceptorViaFunction)) {
SymbolizedStack *frames = symbolizer->SymbolizePC(addr);
for (SymbolizedStack *cur = frames; cur; cur = cur->next) {
const char *function_name = cur->info.function;
if (!function_name) {
continue;
}
// Match "interceptor_via_fun" suppressions.
if (ctx->Match(function_name, SuppressionInterceptorViaFunction, &s)) {
frames->ClearAll();
return true;
}
}
frames->ClearAll();
}
}
return false;
}
} // namespace __asan

29
compiler-rt/lib/asan/asan_suppressions.h Normal file
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@ -0,0 +1,29 @@
//===-- asan_suppressions.h -------------------------------------*- C++ -*-===//
//
// 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.
//
// ASan-private header for asan_suppressions.cc.
//===----------------------------------------------------------------------===//
#ifndef ASAN_SUPPRESSIONS_H
#define ASAN_SUPPRESSIONS_H
#include "asan_internal.h"
#include "sanitizer_common/sanitizer_stacktrace.h"
namespace __asan {
void InitializeSuppressions();
bool IsInterceptorSuppressed(const char *interceptor_name);
bool HaveStackTraceBasedSuppressions();
bool IsStackTraceSuppressed(const StackTrace *stack);
} // namespace __asan
#endif // ASAN_SUPPRESSIONS_H

5
compiler-rt/lib/sanitizer_common/sanitizer_suppressions.cc
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@ -22,8 +22,9 @@
namespace __sanitizer {
static const char *const kTypeStrings[SuppressionTypeCount] = {
"none", "race", "mutex", "thread", "signal",
"leak", "called_from_lib", "deadlock", "vptr_check"};
"none", "race", "mutex", "thread", "signal", "leak", "called_from_lib",
"deadlock", "vptr_check", "interceptor_name", "interceptor_via_fun",
"interceptor_via_lib"};
bool TemplateMatch(char *templ, const char *str) {
if (str == 0 || str[0] == 0)

3
compiler-rt/lib/sanitizer_common/sanitizer_suppressions.h
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@ -28,6 +28,9 @@ enum SuppressionType {
SuppressionLib,
SuppressionDeadlock,
SuppressionVptrCheck,
SuppressionInterceptorName,
SuppressionInterceptorViaFunction,
SuppressionInterceptorViaLibrary,
SuppressionTypeCount
};

10
compiler-rt/lib/sanitizer_common/tests/sanitizer_suppressions_test.cc
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@ -71,8 +71,16 @@ TEST(Suppressions, TypeStrings) {
!internal_strcmp(SuppressionTypeString(SuppressionDeadlock), "deadlock"));
CHECK(!internal_strcmp(SuppressionTypeString(SuppressionVptrCheck),
"vptr_check"));
CHECK(!internal_strcmp(SuppressionTypeString(SuppressionInterceptorName),
"interceptor_name"));
CHECK(
!internal_strcmp(SuppressionTypeString(SuppressionInterceptorViaFunction),
"interceptor_via_fun"));
CHECK(
!internal_strcmp(SuppressionTypeString(SuppressionInterceptorViaLibrary),
"interceptor_via_lib"));
// Ensure this test is up-to-date when suppression types are added.
CHECK_EQ(9, SuppressionTypeCount);
CHECK_EQ(12, SuppressionTypeCount);
}
class SuppressionContextTest : public ::testing::Test {

34
compiler-rt/test/asan/TestCases/Darwin/suppressions-darwin.cc Normal file
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@ -0,0 +1,34 @@
// Check that without suppressions, we catch the issue.
// RUN: %clangxx_asan -O0 %s -o %t -framework Foundation
// RUN: not %run %t 2>&1 | FileCheck --check-prefix=CHECK-CRASH %s
// Check that suppressing the interceptor by name works.
// RUN: echo "interceptor_name:memmove" > %t.supp
// RUN: ASAN_OPTIONS=suppressions=%t.supp %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
// Check that suppressing by interceptor name works even without the symbolizer
// RUN: ASAN_OPTIONS=suppressions=%t.supp:symbolize=false %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
// Check that suppressing all reports from a library works.
// RUN: echo "interceptor_via_lib:CoreFoundation" > %t.supp
// RUN: ASAN_OPTIONS=suppressions=%t.supp %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
// Check that suppressing library works even without the symbolizer.
// RUN: ASAN_OPTIONS=suppressions=%t.supp:symbolize=false %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
#include <CoreFoundation/CoreFoundation.h>
int main() {
char *a = (char *)malloc(6);
strcpy(a, "hello");
CFStringRef str =
CFStringCreateWithBytes(kCFAllocatorDefault, (unsigned char *)a, 10,
kCFStringEncodingUTF8, FALSE); // BOOM
fprintf(stderr, "Ignored.\n");
free(a);
}
// CHECK-CRASH: AddressSanitizer: heap-buffer-overflow
// CHECK-CRASH-NOT: Ignored.
// CHECK-IGNORE-NOT: AddressSanitizer: heap-buffer-overflow
// CHECK-IGNORE: Ignored.

27
compiler-rt/test/asan/TestCases/suppressions-function.cc Normal file
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@ -0,0 +1,27 @@
// Check that without suppressions, we catch the issue.
// RUN: %clangxx_asan -O0 %s -o %t
// RUN: not %run %t 2>&1 | FileCheck --check-prefix=CHECK-CRASH %s
// RUN: echo "interceptor_via_fun:crash_function" > %t.supp
// RUN: %clangxx_asan -O0 %s -o %t && ASAN_OPTIONS=suppressions=%t.supp %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
// RUN: %clangxx_asan -O3 %s -o %t && ASAN_OPTIONS=suppressions=%t.supp %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void crash_function() {
char *a = (char *)malloc(6);
free(a);
size_t len = strlen(a); // BOOM
fprintf(stderr, "strlen ignored, len = %zu\n", len);
}
int main() {
crash_function();
}
// CHECK-CRASH: AddressSanitizer: heap-use-after-free
// CHECK-CRASH-NOT: strlen ignored
// CHECK-IGNORE-NOT: AddressSanitizer: heap-use-after-free
// CHECK-IGNORE: strlen ignored

22
compiler-rt/test/asan/TestCases/suppressions-interceptor.cc Normal file
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@ -0,0 +1,22 @@
// Check that without suppressions, we catch the issue.
// RUN: %clangxx_asan -O0 %s -o %t
// RUN: not %run %t 2>&1 | FileCheck --check-prefix=CHECK-CRASH %s
// RUN: echo "interceptor_name:strlen" > %t.supp
// RUN: ASAN_OPTIONS=suppressions=%t.supp %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
char *a = (char *)malloc(6);
free(a);
size_t len = strlen(a); // BOOM
fprintf(stderr, "strlen ignored, len = %zu\n", len);
}
// CHECK-CRASH: AddressSanitizer: heap-use-after-free
// CHECK-CRASH-NOT: strlen ignored
// CHECK-IGNORE-NOT: AddressSanitizer: heap-use-after-free
// CHECK-IGNORE: strlen ignored

37
compiler-rt/test/asan/TestCases/suppressions-library.cc Normal file
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@ -0,0 +1,37 @@
// RUN: %clangxx_asan -O0 -DSHARED_LIB %s -fPIC -shared -o %t-so.so
// RUN: %clangxx_asan -O0 %s %t-so.so -o %t
// Check that without suppressions, we catch the issue.
// RUN: not %run %t 2>&1 | FileCheck --check-prefix=CHECK-CRASH %s
// RUN: echo "interceptor_via_lib:%t-so.so" > %t.supp
// RUN: ASAN_OPTIONS=suppressions=%t.supp %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if !defined(SHARED_LIB)
void crash_function();
int main(int argc, char *argv[]) {
crash_function();
return 0;
}
#else // SHARED_LIB
void crash_function() {
char *a = (char *)malloc(6);
free(a);
size_t len = strlen(a); // BOOM
fprintf(stderr, "strlen ignored, %zu\n", len);
}
#endif // SHARED_LIB
// CHECK-CRASH: AddressSanitizer: heap-use-after-free
// CHECK-CRASH-NOT: strlen ignored
// CHECK-IGNORE-NOT: AddressSanitizer: heap-use-after-free
// CHECK-IGNORE: strlen ignored