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| //===-- CrashReason.cpp -----------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#include "CrashReason.h"
#include "llvm/Support/raw_ostream.h"
#include <sstream>
namespace {
void AppendFaultAddr(std::string &str, lldb::addr_t addr) {
std::stringstream ss;
ss << " (fault address: 0x" << std::hex << addr << ")";
str += ss.str();
}
#if defined(si_lower) && defined(si_upper)
void AppendBounds(std::string &str, lldb::addr_t lower_bound,
lldb::addr_t upper_bound, lldb::addr_t addr) {
llvm::raw_string_ostream stream(str);
if ((unsigned long)addr < lower_bound)
stream << ": lower bound violation ";
else
stream << ": upper bound violation ";
stream << "(fault address: 0x";
stream.write_hex(addr);
stream << ", lower bound: 0x";
stream.write_hex(lower_bound);
stream << ", upper bound: 0x";
stream.write_hex(upper_bound);
stream << ")";
stream.flush();
}
#endif
CrashReason GetCrashReasonForSIGSEGV(const siginfo_t &info) {
assert(info.si_signo == SIGSEGV);
switch (info.si_code) {
#ifdef SI_KERNEL
case SI_KERNEL:
// Some platforms will occasionally send nonstandard spurious SI_KERNEL
// codes. One way to get this is via unaligned SIMD loads.
return CrashReason::eInvalidAddress; // for lack of anything better
#endif
case SEGV_MAPERR:
return CrashReason::eInvalidAddress;
case SEGV_ACCERR:
return CrashReason::ePrivilegedAddress;
#ifndef SEGV_BNDERR
#define SEGV_BNDERR 3
#endif
case SEGV_BNDERR:
return CrashReason::eBoundViolation;
}
return CrashReason::eInvalidCrashReason;
}
CrashReason GetCrashReasonForSIGILL(const siginfo_t &info) {
assert(info.si_signo == SIGILL);
switch (info.si_code) {
case ILL_ILLOPC:
return CrashReason::eIllegalOpcode;
case ILL_ILLOPN:
return CrashReason::eIllegalOperand;
case ILL_ILLADR:
return CrashReason::eIllegalAddressingMode;
case ILL_ILLTRP:
return CrashReason::eIllegalTrap;
case ILL_PRVOPC:
return CrashReason::ePrivilegedOpcode;
case ILL_PRVREG:
return CrashReason::ePrivilegedRegister;
case ILL_COPROC:
return CrashReason::eCoprocessorError;
case ILL_BADSTK:
return CrashReason::eInternalStackError;
}
return CrashReason::eInvalidCrashReason;
}
CrashReason GetCrashReasonForSIGFPE(const siginfo_t &info) {
assert(info.si_signo == SIGFPE);
switch (info.si_code) {
case FPE_INTDIV:
return CrashReason::eIntegerDivideByZero;
case FPE_INTOVF:
return CrashReason::eIntegerOverflow;
case FPE_FLTDIV:
return CrashReason::eFloatDivideByZero;
case FPE_FLTOVF:
return CrashReason::eFloatOverflow;
case FPE_FLTUND:
return CrashReason::eFloatUnderflow;
case FPE_FLTRES:
return CrashReason::eFloatInexactResult;
case FPE_FLTINV:
return CrashReason::eFloatInvalidOperation;
case FPE_FLTSUB:
return CrashReason::eFloatSubscriptRange;
}
return CrashReason::eInvalidCrashReason;
}
CrashReason GetCrashReasonForSIGBUS(const siginfo_t &info) {
assert(info.si_signo == SIGBUS);
switch (info.si_code) {
case BUS_ADRALN:
return CrashReason::eIllegalAlignment;
case BUS_ADRERR:
return CrashReason::eIllegalAddress;
case BUS_OBJERR:
return CrashReason::eHardwareError;
}
return CrashReason::eInvalidCrashReason;
}
}
std::string GetCrashReasonString(CrashReason reason, const siginfo_t &info) {
std::string str;
// make sure that siginfo_t has the bound fields available.
#if defined(si_lower) && defined(si_upper)
if (reason == CrashReason::eBoundViolation) {
str = "signal SIGSEGV";
AppendBounds(str, reinterpret_cast<lldb::addr_t>(info.si_lower),
reinterpret_cast<lldb::addr_t>(info.si_upper),
reinterpret_cast<lldb::addr_t>(info.si_addr));
return str;
}
#endif
return GetCrashReasonString(reason,
reinterpret_cast<lldb::addr_t>(info.si_addr));
}
std::string GetCrashReasonString(CrashReason reason, lldb::addr_t fault_addr) {
std::string str;
switch (reason) {
default:
str = "unknown crash reason";
break;
case CrashReason::eInvalidAddress:
str = "signal SIGSEGV: invalid address";
AppendFaultAddr(str, fault_addr);
break;
case CrashReason::ePrivilegedAddress:
str = "signal SIGSEGV: address access protected";
AppendFaultAddr(str, fault_addr);
break;
case CrashReason::eBoundViolation:
str = "signal SIGSEGV: bound violation";
break;
case CrashReason::eIllegalOpcode:
str = "signal SIGILL: illegal instruction";
break;
case CrashReason::eIllegalOperand:
str = "signal SIGILL: illegal instruction operand";
break;
case CrashReason::eIllegalAddressingMode:
str = "signal SIGILL: illegal addressing mode";
break;
case CrashReason::eIllegalTrap:
str = "signal SIGILL: illegal trap";
break;
case CrashReason::ePrivilegedOpcode:
str = "signal SIGILL: privileged instruction";
break;
case CrashReason::ePrivilegedRegister:
str = "signal SIGILL: privileged register";
break;
case CrashReason::eCoprocessorError:
str = "signal SIGILL: coprocessor error";
break;
case CrashReason::eInternalStackError:
str = "signal SIGILL: internal stack error";
break;
case CrashReason::eIllegalAlignment:
str = "signal SIGBUS: illegal alignment";
break;
case CrashReason::eIllegalAddress:
str = "signal SIGBUS: illegal address";
break;
case CrashReason::eHardwareError:
str = "signal SIGBUS: hardware error";
break;
case CrashReason::eIntegerDivideByZero:
str = "signal SIGFPE: integer divide by zero";
break;
case CrashReason::eIntegerOverflow:
str = "signal SIGFPE: integer overflow";
break;
case CrashReason::eFloatDivideByZero:
str = "signal SIGFPE: floating point divide by zero";
break;
case CrashReason::eFloatOverflow:
str = "signal SIGFPE: floating point overflow";
break;
case CrashReason::eFloatUnderflow:
str = "signal SIGFPE: floating point underflow";
break;
case CrashReason::eFloatInexactResult:
str = "signal SIGFPE: inexact floating point result";
break;
case CrashReason::eFloatInvalidOperation:
str = "signal SIGFPE: invalid floating point operation";
break;
case CrashReason::eFloatSubscriptRange:
str = "signal SIGFPE: invalid floating point subscript range";
break;
}
return str;
}
const char *CrashReasonAsString(CrashReason reason) {
const char *str = nullptr;
switch (reason) {
case CrashReason::eInvalidCrashReason:
str = "eInvalidCrashReason";
break;
// SIGSEGV crash reasons.
case CrashReason::eInvalidAddress:
str = "eInvalidAddress";
break;
case CrashReason::ePrivilegedAddress:
str = "ePrivilegedAddress";
break;
case CrashReason::eBoundViolation:
str = "eBoundViolation";
break;
// SIGILL crash reasons.
case CrashReason::eIllegalOpcode:
str = "eIllegalOpcode";
break;
case CrashReason::eIllegalOperand:
str = "eIllegalOperand";
break;
case CrashReason::eIllegalAddressingMode:
str = "eIllegalAddressingMode";
break;
case CrashReason::eIllegalTrap:
str = "eIllegalTrap";
break;
case CrashReason::ePrivilegedOpcode:
str = "ePrivilegedOpcode";
break;
case CrashReason::ePrivilegedRegister:
str = "ePrivilegedRegister";
break;
case CrashReason::eCoprocessorError:
str = "eCoprocessorError";
break;
case CrashReason::eInternalStackError:
str = "eInternalStackError";
break;
// SIGBUS crash reasons:
case CrashReason::eIllegalAlignment:
str = "eIllegalAlignment";
break;
case CrashReason::eIllegalAddress:
str = "eIllegalAddress";
break;
case CrashReason::eHardwareError:
str = "eHardwareError";
break;
// SIGFPE crash reasons:
case CrashReason::eIntegerDivideByZero:
str = "eIntegerDivideByZero";
break;
case CrashReason::eIntegerOverflow:
str = "eIntegerOverflow";
break;
case CrashReason::eFloatDivideByZero:
str = "eFloatDivideByZero";
break;
case CrashReason::eFloatOverflow:
str = "eFloatOverflow";
break;
case CrashReason::eFloatUnderflow:
str = "eFloatUnderflow";
break;
case CrashReason::eFloatInexactResult:
str = "eFloatInexactResult";
break;
case CrashReason::eFloatInvalidOperation:
str = "eFloatInvalidOperation";
break;
case CrashReason::eFloatSubscriptRange:
str = "eFloatSubscriptRange";
break;
}
return str;
}
CrashReason GetCrashReason(const siginfo_t &info) {
switch (info.si_signo) {
case SIGSEGV:
return GetCrashReasonForSIGSEGV(info);
case SIGBUS:
return GetCrashReasonForSIGBUS(info);
case SIGFPE:
return GetCrashReasonForSIGFPE(info);
case SIGILL:
return GetCrashReasonForSIGILL(info);
}
assert(false && "unexpected signal");
return CrashReason::eInvalidCrashReason;
}
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