export_debuglog_test.go

     1  // Copyright 2019 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  // Export debuglog guts for testing.
     6  
     7  package runtime
     8  
     9  const DlogEnabled = dlogEnabled
    10  
    11  const DebugLogBytes = debugLogBytes
    12  
    13  const DebugLogStringLimit = debugLogStringLimit
    14  
    15  type Dlogger = dloggerImpl
    16  
    17  func Dlog() *Dlogger {
    18  	return dlogImpl()
    19  }
    20  
    21  func (l *dloggerImpl) End()                      { l.end() }
    22  func (l *dloggerImpl) B(x bool) *dloggerImpl     { return l.b(x) }
    23  func (l *dloggerImpl) I(x int) *dloggerImpl      { return l.i(x) }
    24  func (l *dloggerImpl) I16(x int16) *dloggerImpl  { return l.i16(x) }
    25  func (l *dloggerImpl) U64(x uint64) *dloggerImpl { return l.u64(x) }
    26  func (l *dloggerImpl) Hex(x uint64) *dloggerImpl { return l.hex(x) }
    27  func (l *dloggerImpl) P(x any) *dloggerImpl      { return l.p(x) }
    28  func (l *dloggerImpl) S(x string) *dloggerImpl   { return l.s(x) }
    29  func (l *dloggerImpl) PC(x uintptr) *dloggerImpl { return l.pc(x) }
    30  
    31  func DumpDebugLog() string {
    32  	gp := getg()
    33  	gp.writebuf = make([]byte, 0, 1<<20)
    34  	printDebugLogImpl()
    35  	buf := gp.writebuf
    36  	gp.writebuf = nil
    37  
    38  	return string(buf)
    39  }
    40  
    41  func ResetDebugLog() {
    42  	stw := stopTheWorld(stwForTestResetDebugLog)
    43  	for l := allDloggers; l != nil; l = l.allLink {
    44  		l.w.write = 0
    45  		l.w.tick, l.w.nano = 0, 0
    46  		l.w.r.begin, l.w.r.end = 0, 0
    47  		l.w.r.tick, l.w.r.nano = 0, 0
    48  	}
    49  	startTheWorld(stw)
    50  }
    51  
    52  func CountDebugLog() int {
    53  	stw := stopTheWorld(stwForTestResetDebugLog)
    54  	i := 0
    55  	for l := allDloggers; l != nil; l = l.allLink {
    56  		i++
    57  	}
    58  	startTheWorld(stw)
    59  	return i
    60  }
    61
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