Also add the missing `.size` directives to all the assembler functions
for slightly improved backtraces.
Test: crasher64 pac; crasher64 bti
Change-Id: I8e0c127cbff56c33637e6ca8f1d927b971951807
r29 is the stack pointer on mips, but it's x2 on riscv64 (and the git
history shows that this was indeed copy & pasted from the mips code)
and since bionic always sets up a signal stack with sigaltstack() I
doubt the comment was relevant even on mips (but no-one ever used it,
so who'd know?).
While I'm here, stop using decimal arithmetic --- the whole point was to
have each register contain the value that was obviously appropriate for
that register. (riscv64's mips-like mess of registers all over the place
means that's not going to be super readable, but there's no reason to
make it worse.)
Also, even though I personally prefer the 0xdead from the old mips code,
everyone else is using 0xa5a5, so let's make riscv64 match the others.
Test: treehugger
Change-Id: Ibbae821bc0a02e07164147d621e342224528c2c9
When this was translated to riscv64, someone "fixed" the crashing bugs
that were the whole point of these two functions. Fix them back so they
actually crash, and add the CFI directives.
Test: treehugger
Change-Id: I312c51fa4c893d27b0f4e39383521657a5870a0d
* Intentional crash test code with null/free/escape warnings.
Test: make tidy-system-core-debuggerd_subset
Change-Id: Ib1255c17a374729c82aa246c6a59156dbc4e1b77
Signed-off-by: Xia Lifang <lifang_xia@linux.alibaba.com>
Signed-off-by: Mao Han <han_mao@linux.alibaba.com>
Change-Id: I521c6da61cf2f6f67a73febf368068c430d94cdb
One is intentionally seeting the abort message. The other is to set
the abort message to null.
Also, make the libseccomp_policy static so that the crasher
executable can be copied to the system afterwards without
requiring libseccomp_policy.so.
Test: Ran both new crash commands on device.
Test: Ran the seccomp crash command to verify seccomp still works.
Change-Id: I255b5f37e6eb188719e5b72302ca3f5911c8d821
Bug: http://b/181927912
Clang already has -Wfree-nonheap-object but it became a default warning
with clang-r416183
Test: compile crasher.cpp
Change-Id: Ice532e9f373a628e07acd08a4fc7bfa7cf5d4e08
Similar to r.android.com/1247247 I'll be adding more of them for MTE.
Also, change the protocol between the crasher and crash_dump to make
it easier to add new fields and change the referenced data structures
without needing to worry about versioning. The version number for
static executables is now always 1 (where the protocol will never
change), while the version number for dynamic executables is always
4 (where the protocol can change, because the linker and crash_dump
are version locked).
Bug: 135772972
Change-Id: Ib4696d0544d7c87cb429aaaa15f18c3640059e16
TEMP_FAILURE_RETRY's result was unused for the call to read(), so now
mark it as such to silence a possible unused result warning. For
__read_chk(), this function is an internal implementation detail of
FORTIFY in Bionic. Under clang-tidy, FORTIFY checks are actually
removed, so this now results in an unknown function being called. The
code should not be explicitly depending on an implementation detail, but
we can just suppress the failing case to retain test coverage of the
actual implementation.
Bug: http://b/110779387
Test: Build using WITH_TIDY=1
Change-Id: If83ac1d6f3b6dc32c0d0fb56d8e675e53b586f78
Include the illegal instruction in the header if we get a
SIGILL. Otherwise (since these tend to be one-off bit flips), we don't
usually have any information to try to confirm our suspicion that any
given instance is actually a one-off bit flip.
Also add `SIGILL` as a crasher option to easily generate such crashes.
Before:
signal 4 (SIGILL), code 1 (ILL_ILLOPC), fault addr 0xab1456da
After:
signal 4 (SIGILL), code 1 (ILL_ILLOPC), fault addr 0xab1456da (*pc=0xe7f0def0)
Bug: http://b/77274448
Test: ran crasher
Change-Id: I5f8dedca5eea2b117b1b1e48430214b38e1366ed
If a function crashes by jumping into unexecutable code, the old method
could not unwind through that. Add a fallback method to set the pc from
the default return address location.
In addition, add a new finished check for steps. This will provide a method
to indicate that this step is the last step. This prevents cases where
the fallback method might be triggered incorrectly.
Update the libbacktrace code to unwind using the new methodology.
Update the unwind tool to use the new unwind methodology.
Add a new option to crasher that calls through a null function.
Create a new object, Unwinder, that encapsulates the a basic unwind. For now,
libbacktrace will still use the custom code.
Added new unit tests to cover the new cases. Also add a test that
crashes calling a nullptr as a function, and then has call frames in
the signal stack.
Bug: 65842173
Test: Pass all unit tests, verify crasher dumps properly.
Change-Id: Ia18430ab107e9f7bdf0e14a9b74710b1280bd7f4
Android.bp assumed only an armv7-a-neon core needs to set HAS_VFP_D32.
In fact, an armv8 core also has 32 double-word floating point registers
for A32 and T32 ISAs (AArch32 or 32-bit armv8).
Bug: 65568426
Test: lunch aosp_arm64; emulator # on oc-mr1-dev; boot to home screen.
Check crashglue.o actually uses VFP_D16-31 for 32-bit armv8 core.
Change-Id: I34584a27fa24a55bb4809ccd7f99a8122971df0e
Include the ABI in seccomp causes.
Slightly improved command-line usage information.
Fix crasher for seccomp failures.
Bug: N/A
Test: crasher
Change-Id: Ie419ecfe72ee4f5ccf49c927be18350a58a66a90
Remove debuggerd in favor of a helper process that gets execed by
crashing processes.
Bug: http://b/30705528
Test: debuggerd_test
Change-Id: I9906c69473989cbf7fe5ea6cccf9a9c563d75906
