harmony 鸿蒙Freeze Event Overview

  • 2025-06-12
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Freeze Event Overview

HiAppEvent provides APIs for subscribing to freeze events.

The params parameter in the freeze event information is described as follows:

params

Name Type Description
time number Event triggering time, in ms.
foreground boolean Whether the application is running in the foreground. The value true indicates that the application is in the foreground, and the value false indicates the opposite.
bundle_version string Application version.
bundle_name string Application name.
process_name string Process name of the application.
pid number Process ID of the application.
uid number User ID of the application.
uuid string Error ID, which is generated based on fault information and uniquely identifies crash faults of the same type.
exception object Exception information. For details, see exception.
hilog string[] Log information.
event_handler string[] Events not yet handled by the main thread.
event_handler_size_3s string Number of tasks in the task stack at 3s during the THREAD_BLOCK_6S event. This parameter is valid only in the THREAD_BLOCK_6S event.
event_handler_size_6s string Number of tasks in the task stack at 6s during the THREAD_BLOCK_6S event.
peer_binder string[] Binder call information.
threads object[] Full thread call stack. For details, see thread.
memory object Memory information. For details, see memory.
external_log12+ string[] Path of the error log file. If the directory files exceed the threshold (for details, see log_over_limit), new log files may fail to be written. Therefore, delete the log files immediately after they are processed.
log_over_limit12+ boolean Whether the size of generated fault log files and existing log files exceeds the upper limit (5 MB). The value true indicates that the upper limit is exceeded and logs fail to be written. The value false indicates that the upper limit is not exceeded.

exception

Name Type Description
name string Exception type.
message string Exception cause.

thread

Name Type Description
thread_name string Thread name.
tid number Thread ID.
frames object[] Thread call stack. For details, see frame.

frame (native)

Name Type Description
symbol string Function name. When the device is heavily loaded and the call stack is obtained in low-overhead mode, the function name may be lost.
file string File name.
buildId string Unique file ID. When the device is heavily loaded and the call stack is obtained in low-overhead mode, the buildId information may be lost.
pc string PC register address.
offset number Function offset.

frame (JS)

Name Type Description
file string File name.
packageName string Package name of the module.
symbol string Function name.
column number The column where an exception occurs.
line number The line where an exception occurs.

memory

Name Type Description
rss number Size of the memory allocated for a process, in KB.
vss number Size of the virtual memory applied by a process from the system, in KB.
pss number Size of the physical memory actually used by a process, in KB.
sys_free_mem number Size of free memory, in KB.
sys_avail_mem number Size of available memory, in KB.
sys_total_mem number Total memory size, in KB.

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