If the underlying local map changes, it's possible for multiple
threads to try and modify the map data associated with the UnwindLocalMap
object. Add a lock when generating the local map to avoid this problem.
In addition, add a read lock whenever any caller gets the maps iterator.
Updated all iterator callers to make this lock.
Bug: 29387050
Change-Id: Ie34822c3d8fd3bdb3dd126aeeb399969c36508c1
This reverts commit ab5e583327.
And statically link llvm libraries on host to remove dependency
on 32-bit llvm shared library which is not included in the prebuilt.
Bug: 22229391
Change-Id: I8210687655ee1809fd820ab2a6ca5dfaf3f9096d
Using llvm makes libbacktrace stops building for 32 bit on linux host x86_64.
This reverts commit c9c6b6ee77.
Change-Id: Ieb807db881d7bb3132cd09e25fd08c28766ca0a8
Previously, the map printing in tombstones for 64 bit devices uses
a variable length value. This means that the maps are not lined up.
The new format is to print the map as 00000000'00000000 in all ways.
Also fix a bug where the backtrace_map_t did not initialize all
parameters.
Add unit tests for all of the dump_all_maps function.
Bug: 20950813
Change-Id: I30901c8a0251b00d85c4c01476b033ef8db84e32
The new linker relocation packing support uses non-zero load bases,
so we better handle them properly.
Also print out the load base for a map if it's non-zero.
Bug: 20687795
(cherry picked from commit 329ed7dae4)
Change-Id: Ibc37d8c8bb032820dca4e7531184349ba6d402d2
The backtrace structure used to include a pointer to a backtrace_map_t
that represented the map data for a particular pc. This introduced a
race condition where the pointer could be discarded, but the backtrace
structure still contained a pointer to garbage memory. Now all of the map
information is right in the structure.
Bug: 19028453
Change-Id: If7088a73f3c6bf1f3bc8cdd2bb4b62e7cab831c0
These headers are needed for pid_t and free when using libc++ headers (POSIX
does not require that the symbols be exposed with the previous includes).
Change-Id: Ia51a4fdfdbae7377130a43c401c2d8d241671d1e
The way libunwind handles local unwinds is different from remote unwinds,
so create a new map object to handle the differences.
Add new test to verify the map data is being generated correctly.
Add new tests to check for leaks.
Refactor the BACK_LOGW code into a single header file.
Change-Id: I01f3cbfc4b927646174ea1b614fa25d23b9b3427
Update to handle the new optimized way that libunwind works.
In addition, a small refactor of the BacktraceMap code.
A few new tests of for good measure.
Change-Id: I2f9b4f5ad5a0dfe907b31febee76e4b9b94fb76f
This includes removing the map_info.c source and replacing it with the
BacktraceMap class to handle all map related code.
Change all callers of libbacktrace map functionality.
Also modify the corkscrew thread code so that it doesn't need to build
the map twice (once in the corkscrew format and once in the libbacktrace
format).
Change-Id: I32865a39f83a3dd6f958fc03c2759ba47d12382e
Christopher Ferris