b4ef91b97513434a13d6d84a810512315ecf4768 |
10-Jul-2012 |
David 'Digit' Turner <digit@google.com> |
libcorkscrew: avoid future name collisions. This is a forward-compatibility patch used to avoid two problems: 1/ The C library <signal.h> is going to be updated to define 'struct sigcontext' properly soon. Avoid redefining this structure here when it's not really needed to prevent a type conflict. 2/ Similarly, proper ucontext_t support is going to be added, prevent conflict by using a macro renaming trick. Mainly because there is a slight chance that the C library definition will follow a slightly different layout/naming. For context, see details at: http://code.google.com/p/android/issues/detail?id=34784 https://android-review.googlesource.com/#/c/38875/1 Change-Id: Ie94eb5d77297f8e0bafd146b65a648bd8805a551
acktrace-arm.c
|
19b39f371be5250e7b9e88016be1e5e665367b3f |
22-Nov-2011 |
Jeff Brown <jeffbrown@google.com> |
Improve backtrace formatting. 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
acktrace-arm.c
|
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
acktrace-arm.c
trace-arm.c
|
69f4cd7f5add7a7c7f5915e5292aab7eb2a42e9f |
20-Oct-2011 |
Steve Block <steveblock@google.com> |
Rename (IF_)LOGV(_IF) to (IF_)ALOGV(_IF) DO NOT MERGE Bug: 5449033 Change-Id: Ib453f869977a6e909095a578bbf0420851f887d2
acktrace-arm.c
|
bd57bd00b2172af9f315f2d3d62d68ca369e3666 |
26-Oct-2011 |
Jeff Brown <jeffbrown@google.com> |
A wee little division by 8 makes all the difference. Change-Id: Idff879a8461e1abc97dfa624c1441c16df1c7a69
acktrace-arm.c
|
9524e4158fbb988b6a5e4f5be68ee10b7e4dd6d8 |
24-Oct-2011 |
Jeff Brown <jeffbrown@google.com> |
Add support for explicitly dumping native stacks. This change modifies debuggerd so that it can be used to grab the native stacks of a process that has hung and not just crashed. Note that only the root user can do this (for now). adb shell debuggerd <tid> Then use logcat to find the tombstone file that was generated which will have the native stacks of all threads in the requested process. The specified thread will be shown first and will also appear in the main log. Also made some minor tweaks to libcorkscrew so that we could handle statically compiled executables in the future if we compiled the library statically. Improved the "wait_for_user_action" function to support volume down as an alternative for devices that do not have home keys. Removed a mess of gotos. Change-Id: Ic149653986b0c2f503c7f0e8b7cb1f3be7c84d1e
acktrace-arm.c
|
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
acktrace-arm.c
trace-arm.c
|