gitea/modules/log/stack.go

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2.6 KiB
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Better logging (#6038) (#6095) * Panic don't fatal on create new logger Fixes #5854 Signed-off-by: Andrew Thornton <art27@cantab.net> * partial broken * Update the logging infrastrcture Signed-off-by: Andrew Thornton <art27@cantab.net> * Reset the skip levels for Fatal and Error Signed-off-by: Andrew Thornton <art27@cantab.net> * broken ncsa * More log.Error fixes Signed-off-by: Andrew Thornton <art27@cantab.net> * Remove nal * set log-levels to lowercase * Make console_test test all levels * switch to lowercased levels * OK now working * Fix vetting issues * Fix lint * Fix tests * change default logging to match current gitea * Improve log testing Signed-off-by: Andrew Thornton <art27@cantab.net> * reset error skip levels to 0 * Update documentation and access logger configuration * Redirect the router log back to gitea if redirect macaron log but also allow setting the log level - i.e. TRACE * Fix broken level caching * Refactor the router log * Add Router logger * Add colorizing options * Adjust router colors * Only create logger if they will be used * update app.ini.sample * rename Attribute ColorAttribute * Change from white to green for function * Set fatal/error levels * Restore initial trace logger * Fix Trace arguments in modules/auth/auth.go * Properly handle XORMLogger * Improve admin/config page * fix fmt * Add auto-compression of old logs * Update error log levels * Remove the unnecessary skip argument from Error, Fatal and Critical * Add stacktrace support * Fix tests * Remove x/sync from vendors? * Add stderr option to console logger * Use filepath.ToSlash to protect against Windows in tests * Remove prefixed underscores from names in colors.go * Remove not implemented database logger This was removed from Gogs on 4 Mar 2016 but left in the configuration since then. * Ensure that log paths are relative to ROOT_PATH * use path.Join * rename jsonConfig to logConfig * Rename "config" to "jsonConfig" to make it clearer * Requested changes * Requested changes: XormLogger * Try to color the windows terminal If successful default to colorizing the console logs * fixup * Colorize initially too * update vendor * Colorize logs on default and remove if this is not a colorizing logger * Fix documentation * fix test * Use go-isatty to detect if on windows we are on msys or cygwin * Fix spelling mistake * Add missing vendors * More changes * Rationalise the ANSI writer protection * Adjust colors on advice from @0x5c * Make Flags a comma separated list * Move to use the windows constant for ENABLE_VIRTUAL_TERMINAL_PROCESSING * Ensure matching is done on the non-colored message - to simpify EXPRESSION
2019-04-02 01:48:31 -06:00
// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package log
import (
"bytes"
"fmt"
"io/ioutil"
"runtime"
)
var (
unknown = []byte("???")
)
// Stack will skip back the provided number of frames and return a stack trace with source code.
// Although we could just use debug.Stack(), this routine will return the source code and
// skip back the provided number of frames - i.e. allowing us to ignore preceding function calls.
// A skip of 0 returns the stack trace for the calling function, not including this call.
// If the problem is a lack of memory of course all this is not going to work...
func Stack(skip int) string {
buf := new(bytes.Buffer)
// Store the last file we opened as its probable that the preceding stack frame
// will be in the same file
var lines [][]byte
var lastFilename string
for i := skip + 1; ; i++ { // Skip over frames
programCounter, filename, lineNumber, ok := runtime.Caller(i)
// If we can't retrieve the information break - basically we're into go internals at this point.
if !ok {
break
}
// Print equivalent of debug.Stack()
fmt.Fprintf(buf, "%s:%d (0x%x)\n", filename, lineNumber, programCounter)
// Now try to print the offending line
if filename != lastFilename {
data, err := ioutil.ReadFile(filename)
if err != nil {
// can't read this sourcefile
// likely we don't have the sourcecode available
continue
}
lines = bytes.Split(data, []byte{'\n'})
lastFilename = filename
}
fmt.Fprintf(buf, "\t%s: %s\n", functionName(programCounter), source(lines, lineNumber))
}
return buf.String()
}
// functionName converts the provided programCounter into a function name
func functionName(programCounter uintptr) []byte {
function := runtime.FuncForPC(programCounter)
if function == nil {
return unknown
}
name := []byte(function.Name())
// Because we provide the filename we can drop the preceding package name.
if lastslash := bytes.LastIndex(name, []byte("/")); lastslash >= 0 {
name = name[lastslash+1:]
}
// And the current package name.
if period := bytes.Index(name, []byte(".")); period >= 0 {
name = name[period+1:]
}
// And we should just replace the interpunct with a dot
name = bytes.Replace(name, []byte("·"), []byte("."), -1)
return name
}
// source returns a space-trimmed slice of the n'th line.
func source(lines [][]byte, n int) []byte {
n-- // in stack trace, lines are 1-indexed but our array is 0-indexed
if n < 0 || n >= len(lines) {
return unknown
}
return bytes.TrimSpace(lines[n])
}