History log of /system/core/include/corkscrew/ptrace.h
Revision Date Author Comments (<<< Hide modified files) (Show modified files >>>)
5731de9620a632e1b70e19dd816f9807ba84082e 15-Aug-2012 Jean-Baptiste Queru <jbq@google.com> am 83c4398b: am cc12ed32: Merge "[MIPS] debuggerd and libcorkscrew support"

* commit '83c4398b4adb5c2cfaf6487699a8b94901ce0fb1':
[MIPS] debuggerd and libcorkscrew support
231e3c83a3a70b11160fb0da108ebf2e0e7470e2 11-Aug-2012 Chris Dearman <chris@mips.com> [MIPS] debuggerd and libcorkscrew support

Change-Id: I5a241dc2e470148be0ad2c138e31f1aba5ab8812
420a7fa82d0fba6516d76d6024728de010b1cb8d 18-May-2012 Elliott Hughes <enh@google.com> Add missing #includes.

Change-Id: I81405d638f80fc96874ea0b21af3538229aa38a7
f0c5872637a63e28e3cd314cfc915c07f76df9c6 04-Nov-2011 Jeff Brown <jeffbrown@google.com> Improve stack unwinder robustness.

Keep track of whether memory maps are readable. Use the information
in try_get_word to try to avoid accidentally dereferencing an invalid
pointer within the current process. (Note that I haven't ever
seen that happen during normal unwinding, but it pays to be
a little more careful.)

Refactored try_get_word a little to make it easier to pass it the
needed state for validation checks by way of a little memory_t struct.

Improved how the memory map for the current process is cached. This is
important because we need up to date information about readable maps.
Use a 5 second cache expiration.

Improved the PC -> LR fallback logic in the unwinder so we can
eke out an extra frame sometimes.

Fixed a bug reading ELF program headers. The phnum & phentsize
fields are half-words. We were incorrectly interpreting
phnum as a whole word.

Used android_atomic_* operations carefully in the unwinder
to prevent possible memory races between the dumper and the dumpee.
This was highly unlikely (or even impossible due to the presence
of other barriers along the way) but the code is clearer now about
its invariants.

Fixed a bug in debuggerd where the pid was being passed to have
its stack dump taken instead of the tid, resulting in short
stacks because ptrace couldn't read the data if pid != tid.
Did a full sweep to ensure that we use pid / tid correctly everywhere.

Ported old code from debuggerd to rewind the program counter back
one instruction so that it points to the branch instruction itself
instead of the return address.

Change-Id: Icc4eb08320052975a4ae7f0f5f0ac9308a2d33d7
501edd29b823ce1301d2effdd3a9e4b6e2b20b76 20-Oct-2011 Jeff Brown <jeffbrown@google.com> Add a new library for collecting stack traces.

Supports collecting the stack trace of the current thread,
another thread in the same process, or a thread in a
different process (using ptrace).

Change-Id: Ica2594e4436edde4ceb7bcc3d78e6c31a7902cbf