package debug import ( "os" "runtime" ) // PrintStack prints to standard error the stack trace returned by runtime.Stack. func PrintStack() { os.Stderr.Write(Stack()) } // Stack returns a formatted stack trace of the goroutine that calls it. // It calls runtime.Stack with a lar...
在开发过程中,我们可以使用debug包中的PrintStack()函数来打印追踪信息。 func traceTest() { defer func() { if r := recover(); r != nil { debug.PrintStack() } }() // ... } 当程序发生panic时,我们可以使用PrintStack()函数来输出追踪信息。这些信息可以帮助我们找到代码中的问题并进行修复。
// fatal triggers a fatal error that dumps a stack trace and exits./// fatal is equivalent to throw, but is used when user code is expected to be// at fault for the failure, such as racing map writes./// fatal does not include runtime frames, system goroutines, or frame metadata...
caililin1楼•4 个月前
This lead to a large internal refactor of the package to collect and expose thisnaturalstack trace. Fprint and Print have been removed As mentioned earlier, the mechanism for printing not just theerr.Error()text of an error, but also its stack trace, has also changed with feedback from ear...
This lead to a large internal refactor of the package to collect and expose this natural stack trace. Fprint and Print have been removed As mentioned earlier, the mechanism for printing not just the err.Error() text of an error, but also its stack trace, has also changed with feedback fr...
err:=tracerr.New("some error") Or: err:=tracerr.Errorf("some error %d",num) Add Stack Trace to Existing Error Iferrisnilthen it still benilwith no stack trace added. err=tracerr.Wrap(err) Print Error and Stack Trace Stack trace will be printed only iferris of typetracerr.Error, ...
最后调用printCountProfile将相同栈信息的协程合并,统计总数。fetch是一个函数指针,指向了goroutineProfileWithLabelsConcurrent函数,代码如下: // runtime/mprof.go func goroutineProfileWithLabelsConcurrent(p []StackRecord, labels []unsafe.Pointer) (n int, ok bool) { ... stopTheWorld("profile") // ...
map 通过标志位 h.flags 来检查 map 是否存并发写情况,如果存在,则调用 fatal 方法,此时错误为 "fatal error",会强制退出程序,详情见 fatal 源码: // fatal triggers a fatal error that dumps a stack trace and exits. // // fatal is equivalent to throw, but is used when user code is expected...
msg string}type withStack struct{error*stack} 可以看到Wrap的功能为返回一个能够用来标记错误堆栈的错误,WithMessage的功能为返回一个用message标记的错误,具体到函数可以看到Wrap返回的是一个withStack结构,而WithMessage返回是一个withMessage结构,withStack结构中包含了一个*stack,用callers()进行返回,错误堆栈信息...