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//===-- asan_errors.h -------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// ASan-private header for error structures.
//===----------------------------------------------------------------------===//
#ifndef ASAN_ERRORS_H
#define ASAN_ERRORS_H
#include "asan_descriptions.h"
#include "asan_scariness_score.h"
#include "sanitizer_common/sanitizer_common.h"
namespace __asan {
// (*) VS2013 does not implement unrestricted unions, so we need a trivial
// default constructor explicitly defined for each particular error.
// None of the error classes own the stack traces mentioned in them.
struct ErrorBase {
ScarinessScoreBase scariness;
u32 tid;
ErrorBase() = default; // (*)
explicit ErrorBase(u32 tid_) : tid(tid_) {}
ErrorBase(u32 tid_, int initial_score, const char *reason) : tid(tid_) {
scariness.Clear();
scariness.Scare(initial_score, reason);
}
};
struct ErrorDeadlySignal : ErrorBase {
SignalContext signal;
ErrorDeadlySignal() = default; // (*)
ErrorDeadlySignal(u32 tid, const SignalContext &sig)
: ErrorBase(tid),
signal(sig) {
scariness.Clear();
if (signal.IsStackOverflow()) {
scariness.Scare(10, "stack-overflow");
} else if (!signal.is_memory_access) {
scariness.Scare(10, "signal");
} else if (signal.is_true_faulting_addr &&
signal.addr < GetPageSizeCached()) {
scariness.Scare(10, "null-deref");
} else if (signal.addr == signal.pc) {
scariness.Scare(60, "wild-jump");
} else if (signal.write_flag == SignalContext::WRITE) {
scariness.Scare(30, "wild-addr-write");
} else if (signal.write_flag == SignalContext::READ) {
scariness.Scare(20, "wild-addr-read");
} else {
scariness.Scare(25, "wild-addr");
}
}
void Print();
};
struct ErrorDoubleFree : ErrorBase {
const BufferedStackTrace *second_free_stack;
HeapAddressDescription addr_description;
ErrorDoubleFree() = default; // (*)
ErrorDoubleFree(u32 tid, BufferedStackTrace *stack, uptr addr)
: ErrorBase(tid, 42, "double-free"),
second_free_stack(stack) {
CHECK_GT(second_free_stack->size, 0);
GetHeapAddressInformation(addr, 1, &addr_description);
}
void Print();
};
struct ErrorNewDeleteTypeMismatch : ErrorBase {
const BufferedStackTrace *free_stack;
HeapAddressDescription addr_description;
uptr delete_size;
uptr delete_alignment;
ErrorNewDeleteTypeMismatch() = default; // (*)
ErrorNewDeleteTypeMismatch(u32 tid, BufferedStackTrace *stack, uptr addr,
uptr delete_size_, uptr delete_alignment_)
: ErrorBase(tid, 10, "new-delete-type-mismatch"),
free_stack(stack),
delete_size(delete_size_),
delete_alignment(delete_alignment_) {
GetHeapAddressInformation(addr, 1, &addr_description);
}
void Print();
};
struct ErrorFreeNotMalloced : ErrorBase {
const BufferedStackTrace *free_stack;
AddressDescription addr_description;
ErrorFreeNotMalloced() = default; // (*)
ErrorFreeNotMalloced(u32 tid, BufferedStackTrace *stack, uptr addr)
: ErrorBase(tid, 40, "bad-free"),
free_stack(stack),
addr_description(addr, /*shouldLockThreadRegistry=*/false) {}
void Print();
};
struct ErrorAllocTypeMismatch : ErrorBase {
const BufferedStackTrace *dealloc_stack;
AllocType alloc_type, dealloc_type;
AddressDescription addr_description;
ErrorAllocTypeMismatch() = default; // (*)
ErrorAllocTypeMismatch(u32 tid, BufferedStackTrace *stack, uptr addr,
AllocType alloc_type_, AllocType dealloc_type_)
: ErrorBase(tid, 10, "alloc-dealloc-mismatch"),
dealloc_stack(stack),
alloc_type(alloc_type_),
dealloc_type(dealloc_type_),
addr_description(addr, 1, false) {}
void Print();
};
struct ErrorMallocUsableSizeNotOwned : ErrorBase {
const BufferedStackTrace *stack;
AddressDescription addr_description;
ErrorMallocUsableSizeNotOwned() = default; // (*)
ErrorMallocUsableSizeNotOwned(u32 tid, BufferedStackTrace *stack_, uptr addr)
: ErrorBase(tid, 10, "bad-malloc_usable_size"),
stack(stack_),
addr_description(addr, /*shouldLockThreadRegistry=*/false) {}
void Print();
};
struct ErrorSanitizerGetAllocatedSizeNotOwned : ErrorBase {
const BufferedStackTrace *stack;
AddressDescription addr_description;
ErrorSanitizerGetAllocatedSizeNotOwned() = default; // (*)
ErrorSanitizerGetAllocatedSizeNotOwned(u32 tid, BufferedStackTrace *stack_,
uptr addr)
: ErrorBase(tid, 10, "bad-__sanitizer_get_allocated_size"),
stack(stack_),
addr_description(addr, /*shouldLockThreadRegistry=*/false) {}
void Print();
};
struct ErrorCallocOverflow : ErrorBase {
const BufferedStackTrace *stack;
uptr count;
uptr size;
ErrorCallocOverflow() = default; // (*)
ErrorCallocOverflow(u32 tid, BufferedStackTrace *stack_, uptr count_,
uptr size_)
: ErrorBase(tid, 10, "calloc-overflow"),
stack(stack_),
count(count_),
size(size_) {}
void Print();
};
struct ErrorReallocArrayOverflow : ErrorBase {
const BufferedStackTrace *stack;
uptr count;
uptr size;
ErrorReallocArrayOverflow() = default; // (*)
ErrorReallocArrayOverflow(u32 tid, BufferedStackTrace *stack_, uptr count_,
uptr size_)
: ErrorBase(tid, 10, "reallocarray-overflow"),
stack(stack_),
count(count_),
size(size_) {}
void Print();
};
struct ErrorPvallocOverflow : ErrorBase {
const BufferedStackTrace *stack;
uptr size;
ErrorPvallocOverflow() = default; // (*)
ErrorPvallocOverflow(u32 tid, BufferedStackTrace *stack_, uptr size_)
: ErrorBase(tid, 10, "pvalloc-overflow"),
stack(stack_),
size(size_) {}
void Print();
};
struct ErrorInvalidAllocationAlignment : ErrorBase {
const BufferedStackTrace *stack;
uptr alignment;
ErrorInvalidAllocationAlignment() = default; // (*)
ErrorInvalidAllocationAlignment(u32 tid, BufferedStackTrace *stack_,
uptr alignment_)
: ErrorBase(tid, 10, "invalid-allocation-alignment"),
stack(stack_),
alignment(alignment_) {}
void Print();
};
struct ErrorInvalidAlignedAllocAlignment : ErrorBase {
const BufferedStackTrace *stack;
uptr size;
uptr alignment;
ErrorInvalidAlignedAllocAlignment() = default; // (*)
ErrorInvalidAlignedAllocAlignment(u32 tid, BufferedStackTrace *stack_,
uptr size_, uptr alignment_)
: ErrorBase(tid, 10, "invalid-aligned-alloc-alignment"),
stack(stack_),
size(size_),
alignment(alignment_) {}
void Print();
};
struct ErrorInvalidPosixMemalignAlignment : ErrorBase {
const BufferedStackTrace *stack;
uptr alignment;
ErrorInvalidPosixMemalignAlignment() = default; // (*)
ErrorInvalidPosixMemalignAlignment(u32 tid, BufferedStackTrace *stack_,
uptr alignment_)
: ErrorBase(tid, 10, "invalid-posix-memalign-alignment"),
stack(stack_),
alignment(alignment_) {}
void Print();
};
struct ErrorAllocationSizeTooBig : ErrorBase {
const BufferedStackTrace *stack;
uptr user_size;
uptr total_size;
uptr max_size;
ErrorAllocationSizeTooBig() = default; // (*)
ErrorAllocationSizeTooBig(u32 tid, BufferedStackTrace *stack_,
uptr user_size_, uptr total_size_, uptr max_size_)
: ErrorBase(tid, 10, "allocation-size-too-big"),
stack(stack_),
user_size(user_size_),
total_size(total_size_),
max_size(max_size_) {}
void Print();
};
struct ErrorRssLimitExceeded : ErrorBase {
const BufferedStackTrace *stack;
ErrorRssLimitExceeded() = default; // (*)
ErrorRssLimitExceeded(u32 tid, BufferedStackTrace *stack_)
: ErrorBase(tid, 10, "rss-limit-exceeded"),
stack(stack_) {}
void Print();
};
struct ErrorOutOfMemory : ErrorBase {
const BufferedStackTrace *stack;
uptr requested_size;
ErrorOutOfMemory() = default; // (*)
ErrorOutOfMemory(u32 tid, BufferedStackTrace *stack_, uptr requested_size_)
: ErrorBase(tid, 10, "out-of-memory"),
stack(stack_),
requested_size(requested_size_) {}
void Print();
};
struct ErrorStringFunctionMemoryRangesOverlap : ErrorBase {
const BufferedStackTrace *stack;
uptr length1, length2;
AddressDescription addr1_description;
AddressDescription addr2_description;
const char *function;
ErrorStringFunctionMemoryRangesOverlap() = default; // (*)
ErrorStringFunctionMemoryRangesOverlap(u32 tid, BufferedStackTrace *stack_,
uptr addr1, uptr length1_, uptr addr2,
uptr length2_, const char *function_)
: ErrorBase(tid),
stack(stack_),
length1(length1_),
length2(length2_),
addr1_description(addr1, length1, /*shouldLockThreadRegistry=*/false),
addr2_description(addr2, length2, /*shouldLockThreadRegistry=*/false),
function(function_) {
char bug_type[100];
internal_snprintf(bug_type, sizeof(bug_type), "%s-param-overlap", function);
scariness.Clear();
scariness.Scare(10, bug_type);
}
void Print();
};
struct ErrorStringFunctionSizeOverflow : ErrorBase {
const BufferedStackTrace *stack;
AddressDescription addr_description;
uptr size;
ErrorStringFunctionSizeOverflow() = default; // (*)
ErrorStringFunctionSizeOverflow(u32 tid, BufferedStackTrace *stack_,
uptr addr, uptr size_)
: ErrorBase(tid, 10, "negative-size-param"),
stack(stack_),
addr_description(addr, /*shouldLockThreadRegistry=*/false),
size(size_) {}
void Print();
};
struct ErrorBadParamsToAnnotateContiguousContainer : ErrorBase {
const BufferedStackTrace *stack;
uptr beg, end, old_mid, new_mid;
ErrorBadParamsToAnnotateContiguousContainer() = default; // (*)
// PS4: Do we want an AddressDescription for beg?
ErrorBadParamsToAnnotateContiguousContainer(u32 tid,
BufferedStackTrace *stack_,
uptr beg_, uptr end_,
uptr old_mid_, uptr new_mid_)
: ErrorBase(tid, 10, "bad-__sanitizer_annotate_contiguous_container"),
stack(stack_),
beg(beg_),
end(end_),
old_mid(old_mid_),
new_mid(new_mid_) {}
void Print();
};
struct ErrorODRViolation : ErrorBase {
__asan_global global1, global2;
u32 stack_id1, stack_id2;
ErrorODRViolation() = default; // (*)
ErrorODRViolation(u32 tid, const __asan_global *g1, u32 stack_id1_,
const __asan_global *g2, u32 stack_id2_)
: ErrorBase(tid, 10, "odr-violation"),
global1(*g1),
global2(*g2),
stack_id1(stack_id1_),
stack_id2(stack_id2_) {}
void Print();
};
struct ErrorInvalidPointerPair : ErrorBase {
uptr pc, bp, sp;
AddressDescription addr1_description;
AddressDescription addr2_description;
ErrorInvalidPointerPair() = default; // (*)
ErrorInvalidPointerPair(u32 tid, uptr pc_, uptr bp_, uptr sp_, uptr p1,
uptr p2)
: ErrorBase(tid, 10, "invalid-pointer-pair"),
pc(pc_),
bp(bp_),
sp(sp_),
addr1_description(p1, 1, /*shouldLockThreadRegistry=*/false),
addr2_description(p2, 1, /*shouldLockThreadRegistry=*/false) {}
void Print();
};
struct ErrorGeneric : ErrorBase {
AddressDescription addr_description;
uptr pc, bp, sp;
uptr access_size;
const char *bug_descr;
bool is_write;
u8 shadow_val;
ErrorGeneric() = default; // (*)
ErrorGeneric(u32 tid, uptr addr, uptr pc_, uptr bp_, uptr sp_, bool is_write_,
uptr access_size_);
void Print();
};
// clang-format off
#define ASAN_FOR_EACH_ERROR_KIND(macro) \
macro(DeadlySignal) \
macro(DoubleFree) \
macro(NewDeleteTypeMismatch) \
macro(FreeNotMalloced) \
macro(AllocTypeMismatch) \
macro(MallocUsableSizeNotOwned) \
macro(SanitizerGetAllocatedSizeNotOwned) \
macro(CallocOverflow) \
macro(ReallocArrayOverflow) \
macro(PvallocOverflow) \
macro(InvalidAllocationAlignment) \
macro(InvalidAlignedAllocAlignment) \
macro(InvalidPosixMemalignAlignment) \
macro(AllocationSizeTooBig) \
macro(RssLimitExceeded) \
macro(OutOfMemory) \
macro(StringFunctionMemoryRangesOverlap) \
macro(StringFunctionSizeOverflow) \
macro(BadParamsToAnnotateContiguousContainer) \
macro(ODRViolation) \
macro(InvalidPointerPair) \
macro(Generic)
// clang-format on
#define ASAN_DEFINE_ERROR_KIND(name) kErrorKind##name,
#define ASAN_ERROR_DESCRIPTION_MEMBER(name) Error##name name;
#define ASAN_ERROR_DESCRIPTION_CONSTRUCTOR(name) \
ErrorDescription(Error##name const &e) : kind(kErrorKind##name) { \
internal_memcpy(&name, &e, sizeof(name)); \
}
#define ASAN_ERROR_DESCRIPTION_PRINT(name) \
case kErrorKind##name: \
return name.Print();
enum ErrorKind {
kErrorKindInvalid = 0,
ASAN_FOR_EACH_ERROR_KIND(ASAN_DEFINE_ERROR_KIND)
};
struct ErrorDescription {
ErrorKind kind;
// We're using a tagged union because it allows us to have a trivially
// copiable type and use the same structures as the public interface.
//
// We can add a wrapper around it to make it "more c++-like", but that would
// add a lot of code and the benefit wouldn't be that big.
union {
ErrorBase Base;
ASAN_FOR_EACH_ERROR_KIND(ASAN_ERROR_DESCRIPTION_MEMBER)
};
ErrorDescription() { internal_memset(this, 0, sizeof(*this)); }
explicit ErrorDescription(LinkerInitialized) {}
ASAN_FOR_EACH_ERROR_KIND(ASAN_ERROR_DESCRIPTION_CONSTRUCTOR)
bool IsValid() { return kind != kErrorKindInvalid; }
void Print() {
switch (kind) {
ASAN_FOR_EACH_ERROR_KIND(ASAN_ERROR_DESCRIPTION_PRINT)
case kErrorKindInvalid:
CHECK(0);
}
CHECK(0);
}
};
#undef ASAN_FOR_EACH_ERROR_KIND
#undef ASAN_DEFINE_ERROR_KIND
#undef ASAN_ERROR_DESCRIPTION_MEMBER
#undef ASAN_ERROR_DESCRIPTION_CONSTRUCTOR
#undef ASAN_ERROR_DESCRIPTION_PRINT
} // namespace __asan
#endif // ASAN_ERRORS_H
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