Merge "bootstat: refine kernel panic details" (22a10f67) · Commits · e / os / android_system_core

bootstat/bootstat.cpp

+65 −43

Original line number	Diff line number	Diff line
		@@ -291,6 +291,32 @@ bool isBluntRebootReason(const std::string& r) {
		return true;
		}

		bool readPstoreConsole(std::string& console) {
		if (android::base::ReadFileToString("/sys/fs/pstore/console-ramoops-0", &console)) {
		return true;
		}
		return android::base::ReadFileToString("/sys/fs/pstore/console-ramoops", &console);
		}

		bool addKernelPanicSubReason(const std::string& console, std::string& ret) {
		// Check for kernel panic types to refine information
		if (console.rfind("SysRq : Trigger a crash") != std::string::npos) {
		// Can not happen, except on userdebug, during testing/debugging.
		ret = "kernel_panic,sysrq";
		return true;
		}
		if (console.rfind("Unable to handle kernel NULL pointer dereference at virtual address") !=
		std::string::npos) {
		ret = "kernel_panic,NULL";
		return true;
		}
		if (console.rfind("Kernel BUG at ") != std::string::npos) {
		ret = "kernel_panic,BUG";
		return true;
		}
		return false;
		}

		// std::transform Helper callback functions:
		// Converts a string value representing the reason the system booted to a
		// string complying with Android system standard reason.
		@@ -371,18 +397,20 @@ std::string BootReasonStrToReason(const std::string& boot_reason) {
		}
		}

		// Check the other reason resources if the reason is still blunt.
		if (isBluntRebootReason(ret)) {
		if (ret == "kernel_panic") {
		// Check to see if last klog has some refinement hints.
		std::string content;
		if (!android::base::ReadFileToString("/sys/fs/pstore/console-ramoops-0",
		&content)) {
		android::base::ReadFileToString("/sys/fs/pstore/console-ramoops",
		&content);
		if (readPstoreConsole(content)) {
		addKernelPanicSubReason(content, ret);
		}
		} else if (isBluntRebootReason(ret)) {
		// Check the other available reason resources if the reason is still blunt.

		// Check to see if last klog has some refinement hints.
		std::string content;
		if (readPstoreConsole(content)) {
		// The toybox reboot command used directly (unlikely)? But also
		// catches init's response to the Android's more controlled reboot command.
		// catches init's response to Android's more controlled reboot command.
		if (content.rfind("reboot: Power down") != std::string::npos) {
		ret = "shutdown"; // Still too blunt, but more accurate.
		// ToDo: init should record the shutdown reason to kernel messages ala:
		@@ -407,20 +435,14 @@ std::string BootReasonStrToReason(const std::string& boot_reason) {
		}
		}

		// Check for kernel panics, but allowed to override reboot command.
		if (content.rfind("sysrq: SysRq : Trigger a crash") != std::string::npos) {
		// Can not happen, except on userdebug, during testing/debugging.
		ret = "kernel_panic,sysrq";
		} else if (content.rfind(
		"Unable to handle kernel NULL pointer dereference at virtual address")
		!= std::string::npos) {
		ret = "kernel_panic,NULL";
		} else if (content.rfind("Kernel BUG at ") != std::string::npos) {
		ret = "kernel_panic,BUG";
		} else if ((content.rfind("Power held for ") != std::string::npos) \|\|
		(content.rfind("charger: [") != std::string::npos)) {
		// Check for kernel panics, allowed to override reboot command.
		if (!addKernelPanicSubReason(content, ret) &&
		// check for long-press power down
		((content.rfind("Power held for ") != std::string::npos) \|\|
		(content.rfind("charger: [") != std::string::npos))) {
		ret = "cold";
		}
		}

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

		@@ -433,7 +455,7 @@ std::string BootReasonStrToReason(const std::string& boot_reason) {
		// 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=";
		pos = content.rfind(battery); // last one
		size_t pos = content.rfind(battery); // last one
		if (pos != std::string::npos) {
		int level = atoi(content.substr(pos + strlen(battery)).c_str());
		LOG(INFO) << "Battery level at shutdown " << level << "%";
		@@ -497,7 +519,7 @@ std::string BootReasonStrToReason(const std::string& boot_reason) {
		if ((android::base::StartsWith(content, ret.c_str()) && (content[ret.length()] == ',')) \|\|
		!isBluntRebootReason(content)) {
		// Ok, we want it, let's squash it if secondReason is known.
		pos = content.find(',');
		size_t pos = content.find(',');
		if (pos != std::string::npos) {
		++pos;
		std::string secondReason(content.substr(pos));