Objective-C - 命令行 (clang) - 打印堆栈跟踪

Question

我想打印

我正在使用 clang（自动引用计数）从命令行编译的

Objective-C 程序的堆栈跟踪我想知道以下内容：

1. 编译时是否必须添加任何参数？
2. 我是否需要添加任何代码来启动跟踪并打印跟踪？

下面给出的是一个示例程序，我必须为其打印堆栈跟踪：

#import<Foundation/Foundation.h>

@interface Car : NSObject
@property (weak) NSNumber* doors;
@end

@implementation Car 
@synthesize doors;
@end

int main()
{
    system("clear");

    Car *car1 = [[Car alloc] init];

    NSNumber *d1 = [[NSNumber alloc] initWithInteger: 4]; 

    //I want to start printing the stack trace from this point on
    car1.doors = d1;

    printf("---- end\n");

    return(0);
}

用于编译的命令：

clang -fobjc-arc test.m -framework Foundation -o test

Answer 1

#include <execinfo.h>

void printStackTrace() {
    void *returnAddresses[500];
    int depth = backtrace(returnAddresses, sizeof returnAddresses / sizeof *returnAddresses);
    printf("stack depth = %d\n", depth);
    char **symbols = backtrace_symbols(returnAddresses, depth);
    for (int i = 0; i < depth; ++i) {
        printf("%s\n", symbols[i]);
    }
    free(symbols);
}