c80f9e037b
Perfetto is a performance instrumentation and logging framework,
living in AOSP's /external/pefetto.
Perfetto introduces in the system one binary and two daemons
(the binary can specialize in either depending on the cmdline).
1) traced: unprivileged daemon. This is architecturally similar to logd.
It exposes two UNIX sockets:
- /dev/socket/traced_producer : world-accessible, allows to stream
tracing data. A tmpfs file descriptor is sent via SCM_RIGHTS
from traced to each client process, which needs to be able to
mmap it R/W (but not X)
- /dev/socket/traced_consumer : privilege-accessible (only from:
shell, statsd). It allows to configure tracing and read the trace
buffer.
2) traced_probes: privileged daemon. This needs to:
- access tracingfs (/d/tracing) to turn tracing on and off.
- exec atrace
- connect to traced_producer to stream data to traced.
init.rc file:
https://android-review.googlesource.com/c/platform/external/perfetto/+/575382/14/perfetto.rc
Bug: 70942310
Change-Id: Ia3b5fdacbd5a8e6e23b82f1d6fabfa07e4abc405
47 lines
2 KiB
Text
47 lines
2 KiB
Text
###
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### Untrusted v2 sandbox apps.
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###
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typeattribute untrusted_v2_app coredomain;
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app_domain(untrusted_v2_app)
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net_domain(untrusted_v2_app)
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bluetooth_domain(untrusted_v2_app)
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# Read and write system app data files passed over Binder.
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# Motivating case was /data/data/com.android.settings/cache/*.jpg for
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# cropping or taking user photos.
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allow untrusted_v2_app system_app_data_file:file { read write getattr };
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# Access to /data/media.
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allow untrusted_v2_app media_rw_data_file:dir create_dir_perms;
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allow untrusted_v2_app media_rw_data_file:file create_file_perms;
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# Traverse into /mnt/media_rw for bypassing FUSE daemon
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# TODO: narrow this to just MediaProvider
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allow untrusted_v2_app mnt_media_rw_file:dir search;
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# allow cts to query all services
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allow untrusted_v2_app servicemanager:service_manager list;
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allow untrusted_v2_app audioserver_service:service_manager find;
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allow untrusted_v2_app cameraserver_service:service_manager find;
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allow untrusted_v2_app drmserver_service:service_manager find;
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allow untrusted_v2_app mediaserver_service:service_manager find;
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allow untrusted_v2_app mediaextractor_service:service_manager find;
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allow untrusted_v2_app mediacodec_service:service_manager find;
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allow untrusted_v2_app mediametrics_service:service_manager find;
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allow untrusted_v2_app mediadrmserver_service:service_manager find;
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allow untrusted_v2_app nfc_service:service_manager find;
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allow untrusted_v2_app radio_service:service_manager find;
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# TODO: potentially provide a tighter list of services here
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allow untrusted_v2_app app_api_service:service_manager find;
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# gdbserver for ndk-gdb ptrace attaches to app process.
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allow untrusted_v2_app self:process ptrace;
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# Write app-specific trace data to the Perfetto traced damon. This requires
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# connecting to its producer socket and obtaining a (per-process) tmpfs fd.
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allow untrusted_v2_app traced:fd use;
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allow untrusted_v2_app traced_tmpfs:file { read write getattr map };
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unix_socket_connect(untrusted_v2_app, traced_producer, traced)
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