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[ASan] Fixed a reporting bug in (load|store)N functions which would print unknown-crash instead of the proper error message when a the data access is unaligned. 

Reviewed By: kda, eugenis

Differential Revision: https://reviews.llvm.org/D123643
This commit is contained in:
Kirill Stoimenov 2022-04-18 23:36:06 +00:00
parent 4aa5dc15f0
commit 64c929ec09
2 changed files with 84 additions and 6 deletions
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12
compiler-rt/lib/asan/asan_rtl.cpp
View File

@ -187,7 +187,7 @@ ASAN_MEMORY_ACCESS_CALLBACK(store, true, 16)
extern "C"
NOINLINE INTERFACE_ATTRIBUTE
void __asan_loadN(uptr addr, uptr size) {
if (__asan_region_is_poisoned(addr, size)) {
if ((addr = __asan_region_is_poisoned(addr, size))) {
GET_CALLER_PC_BP_SP;
ReportGenericError(pc, bp, sp, addr, false, size, 0, true);
}
@ -196,7 +196,7 @@ void __asan_loadN(uptr addr, uptr size) {
extern "C"
NOINLINE INTERFACE_ATTRIBUTE
void __asan_exp_loadN(uptr addr, uptr size, u32 exp) {
if (__asan_region_is_poisoned(addr, size)) {
if ((addr = __asan_region_is_poisoned(addr, size))) {
GET_CALLER_PC_BP_SP;
ReportGenericError(pc, bp, sp, addr, false, size, exp, true);
}
@ -205,7 +205,7 @@ void __asan_exp_loadN(uptr addr, uptr size, u32 exp) {
extern "C"
NOINLINE INTERFACE_ATTRIBUTE
void __asan_loadN_noabort(uptr addr, uptr size) {
if (__asan_region_is_poisoned(addr, size)) {
if ((addr = __asan_region_is_poisoned(addr, size))) {
GET_CALLER_PC_BP_SP;
ReportGenericError(pc, bp, sp, addr, false, size, 0, false);
}
@ -214,7 +214,7 @@ void __asan_loadN_noabort(uptr addr, uptr size) {
extern "C"
NOINLINE INTERFACE_ATTRIBUTE
void __asan_storeN(uptr addr, uptr size) {
if (__asan_region_is_poisoned(addr, size)) {
if ((addr = __asan_region_is_poisoned(addr, size))) {
GET_CALLER_PC_BP_SP;
ReportGenericError(pc, bp, sp, addr, true, size, 0, true);
}
@ -223,7 +223,7 @@ void __asan_storeN(uptr addr, uptr size) {
extern "C"
NOINLINE INTERFACE_ATTRIBUTE
void __asan_exp_storeN(uptr addr, uptr size, u32 exp) {
if (__asan_region_is_poisoned(addr, size)) {
if ((addr = __asan_region_is_poisoned(addr, size))) {
GET_CALLER_PC_BP_SP;
ReportGenericError(pc, bp, sp, addr, true, size, exp, true);
}
@ -232,7 +232,7 @@ void __asan_exp_storeN(uptr addr, uptr size, u32 exp) {
extern "C"
NOINLINE INTERFACE_ATTRIBUTE
void __asan_storeN_noabort(uptr addr, uptr size) {
if (__asan_region_is_poisoned(addr, size)) {
if ((addr = __asan_region_is_poisoned(addr, size))) {
GET_CALLER_PC_BP_SP;
ReportGenericError(pc, bp, sp, addr, true, size, 0, false);
}

78
compiler-rt/test/asan/TestCases/load_and_store_n.cpp Normal file
View File

@ -0,0 +1,78 @@
// CHECK_REGULAR_LOAD_STORE: call void @__asan_loadN
// CHECK_REGULAR_LOAD_STORE: call void @__asan_storeN
// RUN: %clangxx_asan -O2 -fsanitize-address-outline-instrumentation %s -o %t
// RUN: %clangxx_asan -O2 -fsanitize-address-outline-instrumentation %s -o - -S \
// RUN: -emit-llvm | FileCheck %s --check-prefix=CHECK_REGULAR_LOAD_STORE
// RUN: not %run %t A 2>&1 | FileCheck %s --check-prefix=CHECK_0_BYTES
// RUN: not %run %t B 2>&1 | FileCheck %s --check-prefix=CHECK_0_BYTES
// RUN: not %run %t C 2>&1 | FileCheck %s --check-prefix=CHECK_1_BYTES
// RUN: not %run %t D 2>&1 | FileCheck %s --check-prefix=CHECK_1_BYTES
// CHECK_NOABORT_LOAD_STORE: call void @__asan_loadN_noabort
// CHECK_NOABORT_LOAD_STORE: call void @__asan_storeN_noabort
// RUN: %clangxx_asan -O2 -fsanitize-address-outline-instrumentation %s -o %t \
// RUN: -mllvm -asan-recover=1
// RUN: %clangxx_asan -O2 -fsanitize-address-outline-instrumentation %s -o - -S \
// RUN: -mllvm -asan-recover=1 -emit-llvm \
// RUN: | FileCheck %s --check-prefix=CHECK_NOABORT_LOAD_STORE
// RUN: not %run %t A 2>&1 | FileCheck %s --check-prefix=CHECK_0_BYTES
// RUN: not %run %t B 2>&1 | FileCheck %s --check-prefix=CHECK_0_BYTES
// RUN: not %run %t C 2>&1 | FileCheck %s --check-prefix=CHECK_1_BYTES
// RUN: not %run %t D 2>&1 | FileCheck %s --check-prefix=CHECK_1_BYTES
// CHECK_EXP_LOAD_STORE: call void @__asan_exp_loadN
// CHECK_EXP_LOAD_STORE: call void @__asan_exp_storeN
// RUN: %clangxx_asan -O2 -fsanitize-address-outline-instrumentation %s -o %t \
// RUN: -mllvm -asan-force-experiment=42
// RUN: %clangxx_asan -O2 -fsanitize-address-outline-instrumentation %s -o - -S \
// RUN: -mllvm -asan-force-experiment=42 -emit-llvm \
// RUN: | FileCheck %s --check-prefix=CHECK_EXP_LOAD_STORE
// RUN: not %run %t A 2>&1 | FileCheck %s --check-prefix=CHECK_0_BYTES
// RUN: not %run %t B 2>&1 | FileCheck %s --check-prefix=CHECK_0_BYTES
// RUN: not %run %t C 2>&1 | FileCheck %s --check-prefix=CHECK_1_BYTES
// RUN: not %run %t D 2>&1 | FileCheck %s --check-prefix=CHECK_1_BYTES
// CHECK_0_BYTES: ERROR: AddressSanitizer: global-buffer-overflow on address [[ADDR:.*]] at
// CHECK_0_BYTES: [[ADDR]] is located 0 bytes to the right
// CHECK_1_BYTES: ERROR: AddressSanitizer: global-buffer-overflow on address [[ADDR:.*]] at
// CHECK_1_BYTES: [[ADDR]] is located 1 bytes to the right
#include <sanitizer/asan_interface.h>
#include <stdlib.h>
#include <string.h>
static int64_t mem = -1;
static int64_t *volatile G = &mem;
inline uint16_t UNALIGNED_LOAD(const void *p) {
uint16_t data;
memcpy(&data, p, sizeof data);
return data;
}
inline void UNALIGNED_STORE(uint16_t data, void *p) {
memcpy(p, &data, sizeof data);
}
int main(int argc, char **argv) {
if (argc != 2)
return 1;
int res = 1;
switch (argv[1][0]) {
case 'A':
res = UNALIGNED_LOAD(reinterpret_cast<char *>(G) + 7);
break;
case 'B':
UNALIGNED_STORE(0, reinterpret_cast<char *>(G) + 7);
break;
case 'C':
res = UNALIGNED_LOAD(reinterpret_cast<char *>(G) + 9);
break;
case 'D':
UNALIGNED_STORE(0, reinterpret_cast<char *>(G) + 9);
break;
}
return res;
}