libdebuggerd: store process uptime.
Application developers would like to know how long their process has
been alive for to distinguish between crashes that happen immediately
upon startup and crashes in regular operation.
Test: manual
Change-Id: Ia31eeadfcced358b478c7a7c7bb2e8a0252e30f4
diff --git a/debuggerd/Android.bp b/debuggerd/Android.bp
index fb274ec..7b6f6c0 100644
--- a/debuggerd/Android.bp
+++ b/debuggerd/Android.bp
@@ -238,6 +238,7 @@
"gwp_asan_crash_handler",
"libscudo",
"libtombstone_proto",
+ "libprocinfo",
"libprotobuf-cpp-lite",
],
diff --git a/debuggerd/libdebuggerd/tombstone_proto.cpp b/debuggerd/libdebuggerd/tombstone_proto.cpp
index bb3c7ea..2ed9ea5 100644
--- a/debuggerd/libdebuggerd/tombstone_proto.cpp
+++ b/debuggerd/libdebuggerd/tombstone_proto.cpp
@@ -29,10 +29,12 @@
#include <time.h>
#include <memory>
+#include <optional>
#include <string>
#include <async_safe/log.h>
+#include <android-base/file.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
@@ -44,6 +46,7 @@
#include <log/logprint.h>
#include <private/android_filesystem_config.h>
+#include <procinfo/process.h>
#include <unwindstack/Maps.h>
#include <unwindstack/Memory.h>
#include <unwindstack/Regs.h>
@@ -422,6 +425,14 @@
dump_log_file(tombstone, "main", pid);
}
+static std::optional<uint64_t> read_uptime_secs() {
+ std::string uptime;
+ if (!android::base::ReadFileToString("/proc/uptime", &uptime)) {
+ return {};
+ }
+ return strtoll(uptime.c_str(), nullptr, 10);
+}
+
void engrave_tombstone_proto(Tombstone* tombstone, unwindstack::Unwinder* unwinder,
const std::map<pid_t, ThreadInfo>& threads, pid_t target_thread,
const ProcessInfo& process_info, const OpenFilesList* open_files) {
@@ -432,6 +443,22 @@
result.set_revision(android::base::GetProperty("ro.revision", "unknown"));
result.set_timestamp(get_timestamp());
+ std::optional<uint64_t> system_uptime = read_uptime_secs();
+ if (system_uptime) {
+ android::procinfo::ProcessInfo proc_info;
+ std::string error;
+ if (android::procinfo::GetProcessInfo(target_thread, &proc_info, &error)) {
+ uint64_t starttime = proc_info.starttime / sysconf(_SC_CLK_TCK);
+ result.set_process_uptime(*system_uptime - starttime);
+ } else {
+ async_safe_format_log(ANDROID_LOG_ERROR, LOG_TAG, "failed to read process info: %s",
+ error.c_str());
+ }
+ } else {
+ async_safe_format_log(ANDROID_LOG_ERROR, LOG_TAG, "failed to read /proc/uptime: %s",
+ strerror(errno));
+ }
+
const ThreadInfo& main_thread = threads.at(target_thread);
result.set_pid(main_thread.pid);
result.set_tid(main_thread.tid);
diff --git a/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp b/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
index 187379d..d97dae7 100644
--- a/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
+++ b/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
@@ -313,6 +313,7 @@
CBL("Revision: '%s'", tombstone.revision().c_str());
CBL("ABI: '%s'", abi_string(tombstone));
CBL("Timestamp: %s", tombstone.timestamp().c_str());
+ CBL("Process uptime: %ds", tombstone.process_uptime());
// Process header
const auto& threads = tombstone.threads();
diff --git a/debuggerd/proto/tombstone.proto b/debuggerd/proto/tombstone.proto
index 2c7156b..57a3b3e 100644
--- a/debuggerd/proto/tombstone.proto
+++ b/debuggerd/proto/tombstone.proto
@@ -19,6 +19,9 @@
string process_name = 9;
+ // Process uptime in seconds.
+ uint32 process_uptime = 20;
+
Signal signal_info = 10;
string abort_message = 14;
Cause cause = 15;
@@ -28,7 +31,7 @@
repeated LogBuffer log_buffers = 18;
repeated FD open_fds = 19;
- reserved 20 to 999;
+ reserved 21 to 999;
}
enum Architecture {