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Crasher.mm
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Crasher.mm
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//
// Crasher.m
// MetricaSample
//
// Created by Nikolay Volosatov on 10/11/19.
// Copyright © 2019 Yandex, LLC. All rights reserved.
//
#import "Crasher.h"
#import "MetricaSample-Swift.h"
#include <deque>
@interface MyClass: NSObject
@property (nonatomic, copy) NSString *info;
@end
@implementation MyClass
- (void)executeWithCallback:(dispatch_block_t)block
{
block();
NSLog(@"Executed. Info: %@", self.info);
}
@end
class CustomCPPException: public std::exception
{
public:
virtual const char* what() const noexcept;
};
const char* CustomCPPException::what() const noexcept
{
return "Something bad happened...";
}
@implementation Crasher
#pragma mark - NSException
+ (void)processResponse:(NSData *)responseData
{
NSDictionary *responseDictionary =
[NSJSONSerialization JSONObjectWithData:responseData options:0 error:nil];
NSString *actionName = responseDictionary[@"action"];
NSString *message = responseDictionary[@"message"];
NSLog(@"The result for '%@' is '%@'", actionName, message);
}
+ (void)crashWithUnknownSelector
{
NSData *response = [@"[\"not-a-dictionary\"]" dataUsingEncoding:NSUTF8StringEncoding];
[self processResponse:response];
}
#pragma mark - C++ Exception
int processNext(std::deque<int> &values) {
int value = values.at(0);
oslog("Next is: %d", value);
values.pop_front();
return value;
}
+ (void)crashWithCPPOutOfBounds
{
std::deque<int> noValues;
processNext(noValues);
}
+ (void)crashWithCPPThrowSTLException
{
throw std::exception();
}
+ (void)crashWithCPPThrowCustomException
{
throw CustomCPPException();
}
#pragma mark - SIGNAL / Mach Exception
// SIGFPE
+ (NSInteger)groupsCountWithTotal:(NSInteger)total sizeLimit:(NSInteger)limit
{
NSInteger result = total / limit;
if (total % limit != 0) {
++result;
}
return result;
}
+ (void)crashWithSIGFPE
{
NSInteger groupsCount = [self groupsCountWithTotal:42 sizeLimit:0];
oslog("Groups count: %ld", (long)groupsCount);
}
// SIGABRT
void doAssert() {
assert(false);
}
+ (void)crashWithSIGABRT
{
doAssert();
}
// SIGSEGV
void dereferenceNull() {
unsigned int *data = NULL;
oslog("%d", *data);
}
+ (void)crashWithNullPointerDereferenceSIGSEGV
{
accessAteBadFoodPointer();
}
void accessAteBadFoodPointer() {
unsigned int *data = (unsigned int *)0x8badf00d;
oslog("%d", *data);
}
+ (void)crashWithBadFoodSIGSEGV
{
accessAteBadFoodPointer();
}
static void accessDeallocatedObject() {
MyClass *__block obj = [[MyClass alloc] init];
obj.info = @"Some info";
[obj executeWithCallback:^{
NSLog(@"Complete");
obj = nil;
}];
}
+ (void)crashWithSIGSEGVFromObjC
{
accessDeallocatedObject();
}
// SIGBUS
void callFunctionFromHeap() {
unsigned int *data = (unsigned int *)malloc(100);
void (*foo)() = (void (*)())data;
foo();
}
+ (void)crashWithSIGBUS
{
callFunctionFromHeap();
}
void callFunctionFromStack() {
unsigned int data[] = {1, 2, 3};
void (*foo)() = (void (*)())data;
foo();
}
+ (void)crashWithSIGBUSWithoutSignal
{
callFunctionFromStack();
}
// SIGILL / SIGTRAP
void syncCallOnMainQueue() {
dispatch_sync(dispatch_get_main_queue(), ^{
NSLog(@"On main queue");
});
}
+ (void)crashByDispatchingOnMainQueue
{
syncCallOnMainQueue();
}
#pragma mark - Swift Exception
+ (void)crashWithSwiftFatalError
{
[SwiftCrasher fatal];
}
+ (void)crashWithSwiftUnhandledError
{
[SwiftCrasher unhandledError];
}
+ (void)crashWithSwiftUnwrappingNull
{
[SwiftCrasher unwrappingNull];
}
@end