Merge "bootstat: remove the only caller of liblogcat." (8c6f7ec0) · Commits · e / os / android_system_core

bootstat/Android.bp

+0 −1

Original line number	Diff line number	Diff line
		@@ -63,7 +63,6 @@ cc_binary {
		name: "bootstat",
		defaults: ["bootstat_defaults"],
		static_libs: ["libbootstat"],
		shared_libs: ["liblogcat"],
		init_rc: ["bootstat.rc"],
		product_variables: {
		pdk: {

bootstat/bootstat.cpp

+1 −81

Original line number	Diff line number	Diff line
		@@ -43,7 +43,6 @@
		#include <android/log.h>
		#include <cutils/android_reboot.h>
		#include <cutils/properties.h>
		#include <log/logcat.h>
		#include <metricslogger/metrics_logger.h>

		#include "boot_event_record_store.h"
		@@ -870,86 +869,7 @@ std::string BootReasonStrToReason(const std::string& boot_reason) {
		}
		}

		// The following battery test should migrate to a default system health HAL

		// Let us not worry if the reboot command was issued, for the cases of
		// reboot -p, reboot <no reason>, reboot cold, reboot warm and reboot hard.
		// Same for bootloader and ro.boot.bootreasons of this set, but a dead
		// battery could conceivably lead to these, so worthy of override.
		if (isBluntRebootReason(ret)) {
		// Heuristic to determine if shutdown possibly because of a dead battery?
		// Really a hail-mary pass to find it in last klog content ...
		static const int battery_dead_threshold = 2; // percent
		static const char battery[] = "healthd: battery l=";
		const pstoreConsole console(content);
		size_t pos = console.rfind(battery); // last one
		std::string digits;
		if (pos != std::string::npos) {
		digits = content.substr(pos + strlen(battery), strlen("100 "));
		// correct common errors
		correctForBitError(digits, "100 ");
		if (digits[0] == '!') digits[0] = '1';
		if (digits[1] == '!') digits[1] = '1';
		}
		const char* endptr = digits.c_str();
		unsigned level = 0;
		while (::isdigit(*endptr)) {
		level *= 10;
		level += *endptr++ - '0';
		// make sure no leading zeros, except zero itself, and range check.
		if ((level == 0) \|\| (level > 100)) break;
		}
		// example bit error rate issues for 10%
		// 'l=10 ' no bits in error
		// 'l=00 ' single bit error (fails above)
		// 'l=1 ' single bit error
		// 'l=0 ' double bit error
		// There are others, not typically critical because of 2%
		// battery_dead_threshold. KISS check, make sure second
		// character after digit sequence is not a space.
		if ((level <= 100) && (endptr != digits.c_str()) && (endptr[0] == ' ') && (endptr[1] != ' ')) {
		LOG(INFO) << "Battery level at shutdown " << level << "%";
		if (level <= battery_dead_threshold) {
		ret = "shutdown,battery";
		}
		} else { // Most likely
		digits = ""; // reset digits

		// Content buffer no longer will have console data. Beware if more
		// checks added below, that depend on parsing console content.
		content = "";

		LOG(DEBUG) << "Can not find last low battery in last console messages";
		android_logcat_context ctx = create_android_logcat();
		FILE* fp = android_logcat_popen(&ctx, "logcat -b kernel -v brief -d");
		if (fp != nullptr) {
		android::base::ReadFdToString(fileno(fp), &content);
		}
		android_logcat_pclose(&ctx, fp);
		static const char logcat_battery[] = "W/healthd ( 0): battery l=";

		pos = content.find(logcat_battery); // The first one it finds.
		if (pos != std::string::npos) {
		digits = content.substr(pos + strlen(logcat_battery), strlen("100 "));
		}
		endptr = digits.c_str();
		level = 0;
		while (::isdigit(*endptr)) {
		level *= 10;
		level += *endptr++ - '0';
		// make sure no leading zeros, except zero itself, and range check.
		if ((level == 0) \|\| (level > 100)) break;
		}
		if ((level <= 100) && (endptr != digits.c_str()) && (*endptr == ' ')) {
		LOG(INFO) << "Battery level at startup " << level << "%";
		if (level <= battery_dead_threshold) {
		ret = "shutdown,battery";
		}
		} else {
		LOG(DEBUG) << "Can not find first battery level in dmesg or logcat";
		}
		}
		}
		// TODO: use the HAL to get battery level (http://b/77725702).

		// Is there a controlled shutdown hint in last_reboot_reason_property?
		if (isBluntRebootReason(ret)) {