Fix clang-tidy warnings in log_time.h
- Zero initialize log_time instances by default
- Disable implicit conversions by making constructors explicit
- Explicitly initialize to EPOCH in most places
- Change sniffTime() to avoid in-place modification of a log_time
I stopped here, but we could consider following up with a more invasive
change to make log_time instances immutable and perhaps also remove the
default constructor to force explicit initialization to EPOCH.
Test: atest libbase_test netd_unit_test
Change-Id: I67e716ef74adaaf40ab2c6e2e0dddb8d309bc7ca
diff --git a/liblog/include/log/log_time.h b/liblog/include/log/log_time.h
index be69255..09c9910 100644
--- a/liblog/include/log/log_time.h
+++ b/liblog/include/log/log_time.h
@@ -42,23 +42,19 @@
*/
struct log_time {
public:
- uint32_t tv_sec; /* good to Feb 5 2106 */
- uint32_t tv_nsec;
+ uint32_t tv_sec = 0; /* good to Feb 5 2106 */
+ uint32_t tv_nsec = 0;
static const uint32_t tv_sec_max = 0xFFFFFFFFUL;
static const uint32_t tv_nsec_max = 999999999UL;
+ static const timespec EPOCH;
- log_time(const timespec& T)
- : tv_sec(static_cast<uint32_t>(T.tv_sec)),
- tv_nsec(static_cast<uint32_t>(T.tv_nsec)) {
- }
+ log_time() {}
+ explicit log_time(const timespec& T)
+ : tv_sec(static_cast<uint32_t>(T.tv_sec)), tv_nsec(static_cast<uint32_t>(T.tv_nsec)) {}
explicit log_time(uint32_t sec, uint32_t nsec = 0)
: tv_sec(sec), tv_nsec(nsec) {
}
-#define __struct_log_time_private_defined
- static const timespec EPOCH;
- log_time() {
- }
#ifdef __linux__
explicit log_time(clockid_t id) {
timespec T;
diff --git a/liblog/log_time.cpp b/liblog/log_time.cpp
index ae376be..77bb94f 100644
--- a/liblog/log_time.cpp
+++ b/liblog/log_time.cpp
@@ -137,7 +137,7 @@
LIBLOG_ABI_PRIVATE log_time log_time::operator-=(const timespec& T) {
// No concept of negative time, clamp to EPOCH
if (*this <= T) {
- return *this = EPOCH;
+ return *this = log_time(EPOCH);
}
if (this->tv_nsec < (unsigned long int)T.tv_nsec) {
@@ -165,7 +165,7 @@
LIBLOG_ABI_PRIVATE log_time log_time::operator-=(const log_time& T) {
// No concept of negative time, clamp to EPOCH
if (*this <= T) {
- return *this = EPOCH;
+ return *this = log_time(EPOCH);
}
if (this->tv_nsec < T.tv_nsec) {
diff --git a/logd/LogAudit.cpp b/logd/LogAudit.cpp
index 18d5287..470ffed 100644
--- a/logd/LogAudit.cpp
+++ b/logd/LogAudit.cpp
@@ -300,7 +300,7 @@
return 0;
}
- log_time now;
+ log_time now(log_time::EPOCH);
static const char audit_str[] = " audit(";
char* timeptr = strstr(str, audit_str);
diff --git a/logd/LogBuffer.cpp b/logd/LogBuffer.cpp
index fbdbf79..9cbc7c4 100644
--- a/logd/LogBuffer.cpp
+++ b/logd/LogBuffer.cpp
@@ -399,7 +399,7 @@
((*it)->getLogId() != LOG_ID_KERNEL))) {
mLogElements.push_back(elem);
} else {
- log_time end = log_time::EPOCH;
+ log_time end(log_time::EPOCH);
bool end_set = false;
bool end_always = false;
diff --git a/logd/LogKlog.cpp b/logd/LogKlog.cpp
index 513c0c3..edd326a 100644
--- a/logd/LogKlog.cpp
+++ b/logd/LogKlog.cpp
@@ -197,10 +197,9 @@
// NOTREACHED
}
-log_time LogKlog::correction =
- (log_time(CLOCK_REALTIME) < log_time(CLOCK_MONOTONIC))
- ? log_time::EPOCH
- : (log_time(CLOCK_REALTIME) - log_time(CLOCK_MONOTONIC));
+log_time LogKlog::correction = (log_time(CLOCK_REALTIME) < log_time(CLOCK_MONOTONIC))
+ ? log_time(log_time::EPOCH)
+ : (log_time(CLOCK_REALTIME) - log_time(CLOCK_MONOTONIC));
LogKlog::LogKlog(LogBuffer* buf, LogReader* reader, int fdWrite, int fdRead,
bool auditd)
@@ -268,7 +267,7 @@
static const char real_format[] = "%Y-%m-%d %H:%M:%S.%09q UTC";
if (len < (ssize_t)(strlen(real_format) + 5)) return;
- log_time real;
+ log_time real(log_time::EPOCH);
const char* ep = real.strptime(real_string, real_format);
if (!ep || (ep > &real_string[len]) || (real > log_time(CLOCK_REALTIME))) {
return;
@@ -282,20 +281,20 @@
tm.tm_isdst = -1;
localtime_r(&now, &tm);
if ((tm.tm_gmtoff < 0) && ((-tm.tm_gmtoff) > (long)real.tv_sec)) {
- real = log_time::EPOCH;
+ real = log_time(log_time::EPOCH);
} else {
real.tv_sec += tm.tm_gmtoff;
}
if (monotonic > real) {
- correction = log_time::EPOCH;
+ correction = log_time(log_time::EPOCH);
} else {
correction = real - monotonic;
}
}
-void LogKlog::sniffTime(log_time& now, const char*& buf, ssize_t len,
- bool reverse) {
- if (len <= 0) return;
+log_time LogKlog::sniffTime(const char*& buf, ssize_t len, bool reverse) {
+ log_time now(log_time::EPOCH);
+ if (len <= 0) return now;
const char* cp = nullptr;
if ((len > 10) && (*buf == '[')) {
@@ -310,7 +309,7 @@
}
buf = cp;
- if (isMonotonic()) return;
+ if (isMonotonic()) return now;
const char* b;
if (((b = android::strnstr(cp, len, suspendStr))) &&
@@ -329,11 +328,11 @@
// trigger a check for ntp-induced or hardware clock drift.
log_time real(CLOCK_REALTIME);
log_time mono(CLOCK_MONOTONIC);
- correction = (real < mono) ? log_time::EPOCH : (real - mono);
+ correction = (real < mono) ? log_time(log_time::EPOCH) : (real - mono);
} else if (((b = android::strnstr(cp, len, suspendedStr))) &&
(((b += strlen(suspendStr)) - cp) < len)) {
len -= b - cp;
- log_time real;
+ log_time real(log_time::EPOCH);
char* endp;
real.tv_sec = strtol(b, &endp, 10);
if ((*endp == '.') && ((endp - b) < len)) {
@@ -345,7 +344,7 @@
}
if (reverse) {
if (real > correction) {
- correction = log_time::EPOCH;
+ correction = log_time(log_time::EPOCH);
} else {
correction -= real;
}
@@ -363,6 +362,7 @@
now = log_time(CLOCK_REALTIME);
}
}
+ return now;
}
pid_t LogKlog::sniffPid(const char*& buf, ssize_t len) {
@@ -451,8 +451,7 @@
}
parseKernelPrio(cp, len - (cp - buf));
- log_time now;
- sniffTime(now, cp, len - (cp - buf), true);
+ log_time now = sniffTime(cp, len - (cp - buf), true);
const char* suspended = android::strnstr(buf, len, suspendedStr);
if (!suspended || (suspended > cp)) {
@@ -468,7 +467,7 @@
}
parseKernelPrio(cp, len - (cp - buf));
- sniffTime(now, cp, len - (cp - buf), true);
+ sniffTime(cp, len - (cp - buf), true);
}
// Convert kernel log priority number into an Android Logger priority number
@@ -548,8 +547,7 @@
const char* p = buf;
int pri = parseKernelPrio(p, len);
- log_time now;
- sniffTime(now, p, len - (p - buf), false);
+ log_time now = sniffTime(p, len - (p - buf), false);
// sniff for start marker
const char* start = android::strnstr(p, len - (p - buf), klogdStr);
diff --git a/logd/LogKlog.h b/logd/LogKlog.h
index bb92dd2..6bfd6a8 100644
--- a/logd/LogKlog.h
+++ b/logd/LogKlog.h
@@ -55,11 +55,10 @@
}
protected:
- void sniffTime(log_time& now, const char*& buf, ssize_t len, bool reverse);
- pid_t sniffPid(const char*& buf, ssize_t len);
- void calculateCorrection(const log_time& monotonic, const char* real_string,
- ssize_t len);
- virtual bool onDataAvailable(SocketClient* cli);
+ log_time sniffTime(const char*& buf, ssize_t len, bool reverse);
+ pid_t sniffPid(const char*& buf, ssize_t len);
+ void calculateCorrection(const log_time& monotonic, const char* real_string, ssize_t len);
+ virtual bool onDataAvailable(SocketClient* cli);
};
#endif