catchpanic.go

     1  // Copyright 2017 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build !plan9 && !windows
     6  // +build !plan9,!windows
     7  
     8  package main
     9  
    10  /*
    11  #include <signal.h>
    12  #include <stdlib.h>
    13  #include <string.h>
    14  
    15  static void abrthandler(int signum) {
    16  	if (signum == SIGABRT) {
    17  		exit(0);  // success
    18  	}
    19  }
    20  
    21  void registerAbortHandler() {
    22  	struct sigaction act;
    23  	memset(&act, 0, sizeof act);
    24  	act.sa_handler = abrthandler;
    25  	sigaction(SIGABRT, &act, NULL);
    26  }
    27  
    28  static void __attribute__ ((constructor)) sigsetup(void) {
    29  	if (getenv("CGOCATCHPANIC_EARLY_HANDLER") == NULL)
    30  		return;
    31  	registerAbortHandler();
    32  }
    33  */
    34  import "C"
    35  import "os"
    36  
    37  func init() {
    38  	register("CgoCatchPanic", CgoCatchPanic)
    39  }
    40  
    41  // Test that the SIGABRT raised by panic can be caught by an early signal handler.
    42  func CgoCatchPanic() {
    43  	if _, ok := os.LookupEnv("CGOCATCHPANIC_EARLY_HANDLER"); !ok {
    44  		C.registerAbortHandler()
    45  	}
    46  	panic("catch me")
    47  }
    48
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