-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright 2010 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/vlog.h"
#include <stddef.h>
-#include <algorithm>
-#include <limits>
+
#include <ostream>
#include <utility>
+#include "base/check_op.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
const int VlogInfo::kDefaultVlogLevel = 0;
-struct VlogInfo::VmodulePattern {
- enum MatchTarget { MATCH_MODULE, MATCH_FILE };
-
- explicit VmodulePattern(const std::string& pattern);
-
- VmodulePattern() = default;
-
- std::string pattern;
- int vlog_level = VlogInfo::kDefaultVlogLevel;
- MatchTarget match_target = MATCH_MODULE;
- size_t score = 0;
-};
-
VlogInfo::VmodulePattern::VmodulePattern(const std::string& pattern)
- : pattern(pattern) {
+ : pattern(pattern),
+ vlog_level(VlogInfo::kDefaultVlogLevel),
+ match_target(MATCH_MODULE) {
// If the pattern contains a {forward,back} slash, we assume that
// it's meant to be tested against the entire __FILE__ string.
std::string::size_type first_slash = pattern.find_first_of("\\/");
match_target = MATCH_FILE;
}
+VlogInfo::VmodulePattern::VmodulePattern()
+ : vlog_level(VlogInfo::kDefaultVlogLevel), match_target(MATCH_MODULE) {}
+
+// static
+std::vector<VlogInfo::VmodulePattern> VlogInfo::ParseVmoduleLevels(
+ const std::string& vmodule_switch) {
+ std::vector<VmodulePattern> vmodule_levels;
+ base::StringPairs kv_pairs;
+ if (!base::SplitStringIntoKeyValuePairs(vmodule_switch, '=', ',',
+ &kv_pairs)) {
+ DLOG(WARNING) << "Could not fully parse vmodule switch \"" << vmodule_switch
+ << "\"";
+ }
+ for (const auto& pair : kv_pairs) {
+ VmodulePattern pattern(pair.first);
+ if (!base::StringToInt(pair.second, &pattern.vlog_level)) {
+ DLOG(WARNING) << "Parsed vlog level for \"" << pair.first << "="
+ << pair.second << "\" as " << pattern.vlog_level;
+ }
+ vmodule_levels.push_back(pattern);
+ }
+ return vmodule_levels;
+}
+
VlogInfo::VlogInfo(const std::string& v_switch,
const std::string& vmodule_switch,
int* min_log_level)
- : min_log_level_(min_log_level) {
+ : vmodule_levels_(ParseVmoduleLevels(vmodule_switch)),
+ min_log_level_(min_log_level) {
DCHECK_NE(min_log_level, nullptr);
int vlog_level = 0;
DLOG(WARNING) << "Could not parse v switch \"" << v_switch << "\"";
}
}
-
- base::StringPairs kv_pairs;
- if (!base::SplitStringIntoKeyValuePairs(
- vmodule_switch, '=', ',', &kv_pairs)) {
- DLOG(WARNING) << "Could not fully parse vmodule switch \""
- << vmodule_switch << "\"";
- }
- for (base::StringPairs::const_iterator it = kv_pairs.begin();
- it != kv_pairs.end(); ++it) {
- VmodulePattern pattern(it->first);
- if (!base::StringToInt(it->second, &pattern.vlog_level)) {
- DLOG(WARNING) << "Parsed vlog level for \""
- << it->first << "=" << it->second
- << "\" as " << pattern.vlog_level;
- }
- vmodule_levels_.push_back(pattern);
- }
}
VlogInfo::~VlogInfo() = default;
// (and any -inl suffix). We avoid using FilePath to minimize the
// number of dependencies the logging system has.
base::StringPiece GetModule(base::StringPiece file) {
- base::StringPiece module = file;
-
- // Chop off the file extension.
+ base::StringPiece module(file);
+ base::StringPiece::size_type last_slash_pos = module.find_last_of("\\/");
+ if (last_slash_pos != base::StringPiece::npos)
+ module.remove_prefix(last_slash_pos + 1);
base::StringPiece::size_type extension_start = module.rfind('.');
module = module.substr(0, extension_start);
-
- // Chop off the -inl suffix.
- static constexpr base::StringPiece kInlSuffix("-inl");
+ static const char kInlSuffix[] = "-inl";
+ static const int kInlSuffixLen = std::size(kInlSuffix) - 1;
if (base::EndsWith(module, kInlSuffix))
- module.remove_suffix(kInlSuffix.size());
-
- // Chop off the path up to the start of the file name. Using single-character
- // overload of `base::StringPiece::find_last_of` for speed; this overload does
- // not build a lookup table.
- base::StringPiece::size_type last_slash_pos = module.find_last_of('/');
- if (last_slash_pos != base::StringPiece::npos) {
- module.remove_prefix(last_slash_pos + 1);
- return module;
- }
- last_slash_pos = module.find_last_of('\\');
- if (last_slash_pos != base::StringPiece::npos)
- module.remove_prefix(last_slash_pos + 1);
+ module.remove_suffix(kInlSuffixLen);
return module;
}
} // namespace
-int VlogInfo::GetVlogLevel(base::StringPiece file) {
- base::AutoLock lock(vmodule_levels_lock_);
+int VlogInfo::GetVlogLevel(base::StringPiece file) const {
if (!vmodule_levels_.empty()) {
base::StringPiece module(GetModule(file));
- for (size_t i = 0; i < vmodule_levels_.size(); i++) {
- VmodulePattern& it = vmodule_levels_[i];
-
- const bool kUseFile = it.match_target == VmodulePattern::MATCH_FILE;
- if (!MatchVlogPattern(kUseFile ? file : module, it.pattern)) {
- continue;
- }
- const int ret = it.vlog_level;
-
- // Since `it` matched, increase its score because we believe it has a
- // higher probability of winning next time.
- if (it.score == std::numeric_limits<size_t>::max()) {
- for (VmodulePattern& pattern : vmodule_levels_) {
- pattern.score = 0;
- }
- }
- ++it.score;
- if (i > 0 && it.score > vmodule_levels_[i - 1].score)
- std::swap(it, vmodule_levels_[i - 1]);
-
- return ret;
+ for (const auto& it : vmodule_levels_) {
+ base::StringPiece target(
+ (it.match_target == VmodulePattern::MATCH_FILE) ? file : module);
+ if (MatchVlogPattern(target, it.pattern))
+ return it.vlog_level;
}
}
return GetMaxVlogLevel();
return -*min_log_level_;
}
+VlogInfo::VlogInfo(std::vector<VmodulePattern> vmodule_levels,
+ int* min_log_level)
+ : vmodule_levels_(std::move(vmodule_levels)),
+ min_log_level_(min_log_level) {}
+
+VlogInfo* VlogInfo::WithSwitches(const std::string& vmodule_switch) const {
+ std::vector<VmodulePattern> vmodule_levels = vmodule_levels_;
+ std::vector<VmodulePattern> additional_vmodule_levels =
+ ParseVmoduleLevels(vmodule_switch);
+ vmodule_levels.insert(vmodule_levels.end(), additional_vmodule_levels.begin(),
+ additional_vmodule_levels.end());
+ return new VlogInfo(std::move(vmodule_levels), min_log_level_);
+}
+
bool MatchVlogPattern(base::StringPiece string,
base::StringPiece vlog_pattern) {
// The code implements the glob matching using a greedy approach described in
// https://research.swtch.com/glob.
size_t s = 0, nexts = 0;
size_t p = 0, nextp = 0;
- const size_t slen = string.size(), plen = vlog_pattern.size();
+ size_t slen = string.size(), plen = vlog_pattern.size();
while (s < slen || p < plen) {
if (p < plen) {
switch (vlog_pattern[p]) {
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