Also remove a hack that claims to be "just like ARM", but which was
different from the ARM and MIPS behavior.
Change-Id: I9b16da9a56430998ded27d304ce52c7cc8bfedfc
The old code was essentially trying to be C++ in C and was awkward. This
change makes it all objects with a thin layer that C code can use.
There is a C++ backtrace object that is not very useful, this code will
replace it.
This change also includes moving the backtrace test to a gtest, and adding
coverage of all major functionality.
Bug: 8410085
Change-Id: Iae0f1b09b3dd60395f71ed66010c1ea5cdd37841
Remove all of the code in debuggerd that uses libcorkscrew directly
and replace with libbacktrace.
Also do a bit of refactoring to clean up some functions that were
passing around variables that weren't used.
Bug: 8410085
Change-Id: I27da4fbe3f12ce38a85b4432fc1119984c9c391b
Move the liblog headers to log/ instead of cutils/ to complete
the separation of libcutils and liblog. cutils/log.h still
exists and includes log/log.h in order to support the many existing
modules that use cutils/log.h.
Change-Id: I2758c9f4aedcb809ca7ba8383d0f55041dd44345
The system server may prematurely close the connection to
/data/system/ndebugsocket if it's not interested in the data
from debuggerd. If it does so, we don't want to die due to a
SIGPIPE.
Change-Id: Iaef1f497bcd630144e6df6a06644a3293b85b6e0
We should also add a test for heap corruption, but I failed to come up
with a kind of corruption that dlmalloc actually detects (rather than
just crashing accidentally).
Change-Id: I7457e732729635b171ffc44517c3de71f55608e6
Restore the logging of the mem maps around the fault address along
with the rest of the faulting thread's information. (It was still
being written to the tombstone file, but the logging got dropped on
the floor in the refactoring around AM report integration).
Bug 8654694
Change-Id: Id8851fa765dfe6b6ce41ccfc39e85eaac0acc629
Also fixed the LOG() macro to actually write to the log again, tracking
the change in _LOG() argument semantics.
Bug 8322568
Change-Id: I79330c85c26d3ffb734315b6d0f2c0bb80bd234a
The Activity Manager sets up a permission-guarded domain socket, which
debuggerd connects to when a crash happens. If this is successful,
the daemon then mirrors the logged crash report to that socket, then
closes it.
Bug 8322568
Change-Id: Ife0c772a628ef82e8457094e511ce1edbfe57460
Backtracing through eh_frame section is more effective allowing to reuse
ebp register for other purposes within routine. GCC with turned on
optimizations (-O1 and above) implicitly defines -fomit-frame-pointer
anyway. eh_frame sections are generated by default with GCC on any
optimization level.
This change implements remote unwinding (separate process unwinding).
Local unwinding is already implemented through _Unwind_Backtrace call
which is implemented in libgcc.
Change-Id: I1aea1ecd19c21710f9cf5f05dc272fc51b67b7aa
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>
bionic's __stack_chk_fail was preventing debuggerd from dumping
stacks, which was not helpful.
Bug: 2487269
Change-Id: Idba2a274037b960dfb2ac1c21686323268c4b372
So "thread-nostack" runs the "nostack" code on a new thread, and
"thread-abort" runs the "abort" code on a new thread, and so on.
Bug: http://code.google.com/p/android/issues/detail?id=16672
Change-Id: I026a0e43eea147f1a7a74243846954599bcf4238
If somebody sends debuggerd bad data, it logs a complaint
but doesn't give any indication of the source. Now we show
the pid and uid we get from SO_PEERCRED.
Bug 7704699
Change-Id: I2738eb972932cc868ad969b60e16dd0b623212a1
The only common one we were missing is SI_TKILL, but we've had the full
set on the dalvik-dev branch for some time now.
Change-Id: I7cf52d352b8624e0adb17a2ed440e7a10f490dfd
Restore the security contexts of tombstone directory
when initially created.
Change-Id: I25b53730991576eccb62ca57050decd584acc639
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
Provides a new mechanism for dumpstate (while running as root)
to request that debuggerd dump the stacks of native processes that
we care about in bug reports. In this mode, the backtrace
is formatted to look similar to a Dalvik backtrace.
Moved the tombstone generating code into a separate file to
make it easier to maintain.
Fixed a bug where sometimes the stack traces would be incomplete
because we were not waiting for each thread to stop after issuing
PTRACE_ATTACH, only the main thread. So sometimes we were missing
traces for some threads.
Refactored the logging code to prevent accidentally writing data
to logcat when explicitly dumping a tombstone or backtrace from the
console.
Only root or system server can request to dump backtraces but
only root can dump tombstones.
Bug: 6615693
Change-Id: Ib3edcc16f9f3a687e414e3f2d250d9500566123b
Some changes to debuggerd:
(1) Send a SIGSTOP to the target process before doing any of the
PTRACE_ATTACH work. This causes the threads that weren't hit by
the signal to stop moving, which seems to get rid of the "ptrace
detach failed: No such process" problems that result in missed
stack traces and debuggerd self-immolation.
(2) SIGPIPE was in the list of "interesting" signals caught by
debugger_signal_handler(), but debuggerd didn't recognize it, and
you'd get "unexpected signal 13" complaints. It's now in the list.
(3) Fixed a bit-rotted XLOG.
Change-Id: I33297ea6b09ce450671c07dc25846f684afbf480
Show the symbol offset, when available.
Centralized formatting of native stack traces in libcorkscrew.
It's handy for automated tools if all stacks look the same.
Since we already made them all look them same, we might as well
do the formatting in just one place.
Do not strip the Thumb bit on ARM. This fixes an off-by-one
issue that could happen when resolving a PC that was at the
very beginning of a Thumb function, since the symbol table would
have the Thumb bit set but since we stripped the bit from our
PC, we would be looking for an address one byte before the
one listed in the symbol table. It's also quite useful to see
whether a given function is executing in Thumb mode just by glancing
at the PC.
Change-Id: Icaa29add85ce0bcafe24d5ce2098e138d809e2ab
