Some testing environments can have a test that is sending many
thousands of messages to the log. When this type of process crashes
all of these log messages are captured and can cause OOM errors
while creating the tombstone.
Added a test to verify the log messages are truncated. Leaving this
test disabled for now since it is inherently flaky due to having to
assume that 500 messages are in the log.
Added a test for a newline in a log message since it's somewhat
related to this change.
NOTE: The total number of messages is capped at 500, but if a message
contains multiple newlines, the total messages will exceed 500.
Counting messages this way seems to be in the spirit of the cap,
that a process logging a large message with multiple newlines does
not completely fill the tombstone log data.
Bug: 269182937
Bug: 282661754
Test: All unit tests pass.
Test: The disabled max_log_messages test passes.
Change-Id: If18e62b29f899c2c4670101b402e37762bffbec6
Also add new unit tests to verify this behavior.
Bug: 276934420
Test: New unit tests pass.
Test: Ran new unit tests without pthread_setname_np call and verified
Test: the tests fail.
Test: Force crash logd and verify log messages are not gathered.
Test: Force crash a logd thread and verify log messages are not gathered.
Change-Id: If8effef68f629432923cdc89e57d28ef5b8b4ce2
liblog can drop data when debuggerd is overloaded, which leads to
truncated tombstones. by adding the count separately, automation can
easily see whether it is dealing with a truncated tombstone or not.
Bug: 269537146
Change-Id: Ia991537efc0d6b57cbff23ee45af6521467aa20d
When moving to a proto tombstone, backtraces no longer contain
an offset when a frame is in a shared library from an apk.
Add the offset display again if needed, and add a test to
verify this behavior.
Bug: 267341682
Test: All unit tests pass.
Test: Dumped a process running through an apk to verify the offset
Test: is present.
Change-Id: Ib720ccb5bfcc8531d1e407f3d01817e8a0b9128c
An early return out of this function makes it harder to add new prints
after the memory maps.
Test: m, flash, look at tombstone
Change-Id: Id06e432918d69ac3307761b244473b6b7ab769e8
GWP-ASan changed one of the APIs upstream to now take the fault address
as well. This is to support the recoverable mode.
Add the fault address as well.
Test: gwp_asan_unittest
Bug: N/A
Change-Id: I8a4edd3fad159d91cc036050d330bbb8f9c8d435
This is a no-op but will be used in upcoming scudo changes that allow to
change the buffer size at process startup time, and as such we will no
longer be able to call __scudo_get_ring_buffer_size in debuggerd.
Bug: 263287052
Change-Id: I350421d1fcdf22ce3b8b73780b88c1e10fa8a074
Signed-off-by: Liu Cunyuan <liucunyuan.lcy@linux.alibaba.com>
Signed-off-by: Mao Han <han_mao@linux.alibaba.com>
Change-Id: Ie22c2895fc30fab68eddc18713c80e403f44b203
r.android.com/2108505 was intended to fix a crash in Scudo in
the case where the stack depot, region info or ring buffer were
unreadable. However, it also ended up introducing a number of bugs into
the code. It failed to call __scudo_get_error_info if the page at the
fault address was unreadable. This can happen in legitimate crash cases
if a primary allocation was close to the boundary of a mapped region,
or if the allocation was a secondary allocation with guard pages. It
also used long as the type for tags, whereas Scudo expects it to be
char. In combination this ended up causing most of the MTE tests to
fail. Therefore, mostly revert that change.
Fix the original crash by null checking the pointers returned by
AllocAndReadFully before proceeding with the rest of the function.
Bug: 233720136
Change-Id: I04d70d2abffaa35fe315d15d9224f9b412a9825d
In the fallback path, if the non-main thread is the target
to be dumped, then no other threads are dumped when creating
a tombstone. Fix this and add unit tests to verify that
this all threads, including the main thread are dumped.
Bug: 234058038
Test: All unit tests pass.
Test: debuggerd -b media.swcodec process
Test: debuggerd media.swcodec process
Change-Id: Ibb75264f7b3847acdbab939a66902d986c0d0e5c
The code doesn't properly check if data is not read properly, so
make it fail if reads fail. Also, change the algorithm so that
first try and read the faulting page then 16 pages before and 16
pages after. Rather than trying to read every one of these pages,
stop as soon as one is unreadable. This means that the total memory
passed to the scudo error function is all valid data, rather than
potentially being some uninitialized memory.
Added new unit tests to cover scudo address processing.
Bug: 233720136
Test: All unit tests pass.
Test: atest CtsIncidentHostTestCases
Change-Id: I18a97bdee9a0c44075c1c31ccd1b546d10895be9
This simplifies most of the calls to avoid doing any Android
specific code.
Bug: 120606663
Test: All unit tests pass.
Change-Id: I511e637b9459a1f052a01e501b134e31d65b5fbe
With the addition of runtime-configurable GWP-ASan, there might be many,
many more than 1,000 allocations. Have support for them, but keep a
hopefully-won't-crash-the-device limit.
Bug: 219651032
Test: atest bionic-unit-tests
Change-Id: I7b8e2bf5ab7c723ab6c61365f0dc610e400dbbce
The functionality moved from the Unwinder object to the MapInfo
object and means that the individual unreadable files can be
displayed now.
Included adding the unreadable elfs per thread in the protobuf.
Updated the unwinder test.
Test: All unit tests pass.
Change-Id: I7140bde16938736da005f926e10bbdb3dbc0f6f5
When dumping a tombstone using the fallback path, only the main
thread was showing up. Modify the code to dump the threads using
a slightly different path for the tombstone generation code.
In addition, while looking at this code, two MTE variables were
not set in the tombstone fallback code. Added those variables
so MTE devices will work properly in this fallback path.
Modified the tombstone unit tests for seccomp to have
multiple threads and verify those threads show up in the tombstone.
Bug: 208933016
Test: Ran unit tests.
Test: Ran debuggerd <PID> on a privileged process and verified
Test: all threads dumped. Also verified that the tagged_addr_ctrl
Test: variable is present on the raven device.
Change-Id: I16eadb0cc2c37a7dbc5cac16af9b5051008b5127
Hard to get otherwise if you're trying to debug PAC issues.
Bug: http://b/214314197
Test: treehugger
Change-Id: I2e5502809f84579bf287364e59d6e7ff67770919
The frame data no longer contains map_XXX fields which represent
the map data. Now there is only a shared pointer to the MapInfo
object with which this frame is associated.
Bug: 120606663
Test: Unit tests pass.
Change-Id: I89282963f742f6fcc07e48533da4108dc16bdce9
It is expensive to keep the non-protobuf path around and it hasn't
been used for an entire release without anyone noticing, so remove it.
Create new end-to-end unit tests that cover tests of the non-proto
code paths that are being deleted.
Bug: 197981919
Test: Unit tests pass.
Change-Id: Ia1c45572300bd63e5f196ad61e5e5386830c8ece
- Use "likelihood" instead of "probability" since that has connotations
of being less precise, and our probability ordering isn't very precise
anyway.
- Hide the fault address with SEGV_MTEAERR because it is not available.
- Pad the fault address with leading zeroes to make it clearer which
bits of the top byte (and any following bytes such as PAC signature
bits) are set.
Bug: 206015287
Change-Id: I5e1e99b7f3e967c44781d8550bbd7158eb421b64
On the main thread, the siginfo pointer will never be nullptr.
Add a CHECK to make sure this is true.
Test: Unit tests pass both 32 bit and 64 bit.
Test: Ran with debug.debuggerd.translate_proto_to_text set to 0
Test: to exercise old path.
Change-Id: I9d5ed0de5d652de8a4f9cd85eb57cbb1ec676404
This code was added, but a svelte config still tries to use scudo
related code that doesn't exist.
Bug: 201007100
Test: Ran unit tests on normal config.
Test: Ran unit tests on svelte config.
Change-Id: Ic84bae37717d213121aef182bac2f82dbee25213
strerror is nice, but usually I don't care about the text, I care about
the uppercase enum
Bug: N/A
Test: N/A
Change-Id: I8ea86220cb04cbded701379c47b8aba8ea8864b8
I was here because we have a case where timeout(1) kills logcat, but
debuggerd alleges that the process that was killed had started less than
a second ago. I'm not sure this is the problem there, but I did notice
that far too many tombstones were claiming improbably short process
uptimes. It turns out that the code was measuring the *thread* uptime,
not the *process* uptime.
Also simplify the code a bit by switching to sysinfo(2) rather than
reading a file.
Test: manual, plus the existing unit test
Change-Id: Ie2810b1d5777ad9182be92bfb3f60795dc978b24
When the switch was made to dump the tombstone from the protobuf,
the fault address marker in the maps section went missing. Re-add
that logic and add new unit tests to verify all of the different
behaviors.
Bug: 193935960
Test: All unit tests pass.
Test: All unit tests pass when setprop debug.debuggerd.translate_proto_to_text 0
Test: The above on cuttlefish, 32 bit and 64 bit.
Test: The above on a flame, 32 bit and 64 bit.
Change-Id: I098bb6ab4bacacae2ca0fc5ec9a73549ed0b9489
The tombstone will add a newline after the abort message, so remove
any trailing newlines before saving/printing.
Bug: 196414062
Test: Unit tests pass.
Test: Set system property debug.debuggerd.translate_proto_to_text to 0
test: and unit tests still pass.
Change-Id: I0d3dc215eb5d8be93d99e5b9d4f0a14b1d61396d
For the new kernel 5.13 heders, there is a new TRAP_PERF value that
needs to be handled.
Test: Builds.
Change-Id: I2c6658ca94423c210db9ad6692ec69f6be69b3f5
