istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pilot/pkg/util/runtime/runtime.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package runtime
    16  
    17  import (
    18  	"runtime"
    19  
    20  	"istio.io/istio/pkg/log"
    21  )
    22  
    23  // LogPanic logs the caller tree when a panic occurs.
    24  func LogPanic(r any) {
    25  	// Same as stdlib http server code. Manually allocate stack trace buffer size
    26  	// to prevent excessively large logs
    27  	const size = 64 << 10
    28  	stacktrace := make([]byte, size)
    29  	stacktrace = stacktrace[:runtime.Stack(stacktrace, false)]
    30  	log.Errorf("Observed a panic: %#v (%v)\n%s", r, r, stacktrace)
    31  }
    32  
    33  // HandleCrash catches the crash and calls additional handlers.
    34  func HandleCrash(handlers ...func(any)) {
    35  	if r := recover(); r != nil {
    36  		for _, handler := range handlers {
    37  			handler(r)
    38  		}
    39  	}
    40  }