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Author SHA1 Message Date
Arun Sharma
0a26727ea2 Fix TLS destructor ordering problems
Glibc calls thread-specific dtors in the order in which the keys were added,
so the first dtor is the trace_cache_free() one. Then thread-specific
data for some other key is free()d, which calls into unw_backtrace(),
which uses dangling cache and munmapped cache->frames.

[ Minor rename + compiler warning fix: asharma@fb.com ]
Signed-off-by: Paul Pluzhnikov <ppluzhnikov@google.com>
2011-10-29 17:12:36 -07:00
Arun Sharma
08077a4962 pthread_once() workaround for FreeBSD and Solaris
On FreeBSD, as well as on the Solaris < 10, weak pthread_once stub is
always exported from libc. But it does nothing, which means that if
threaded library is not loaded, then pthread_once() call do not actually
call the initializer finction. The construct
  if (likely (pthread_once != 0))
  {
    pthread_once(&trace_cache_once, &trace_cache_init_once);
then fails to initialize the trace cache on x86_64.

Work around by checking that the initializer was indeed called.
Note that this can break if libthr is loaded dynamically, but my belief
is that there is no platforms which allow dynamic loading of the threading
library.
2011-10-29 16:53:30 -07:00
Ken Werner
9a311bf48b [ARM] fix for the check-namespace test case
Add ARM specific symbols and ignore some symbols generated by the ARM Linux
default linker script.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-10-15 23:10:28 -07:00
Ken Werner
7f41e701e3 Have tdep_get_elf_image available in case of UNW_REMOTE_ONLY
Because it gets used by libunwind-ptrace.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-10-15 23:10:28 -07:00
Ken Werner
da4743f52a Exclude arm_find_proc_info and arm_put_unwind_info in case of UNW_REMOTE_ONLY
Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-10-15 23:10:28 -07:00
Ken Werner
c01ea3f6d6 Have dwarf.h include pthread.h
This is required for the pthread_mutex_t type that is beeing used in the
dwarf_rs_cache structure.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-10-15 23:10:28 -07:00
Ken Werner
197571915c Change _UPTi_find_unwind_table to return an integer.
This keeps the definition on IA64 and all the other architectures in sync with
the declaration of _UPTi_find_unwind_table. This also mimics the behaviour of
what's done for local unwinding and allows the function to provide more than
one way to undwind.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-10-15 23:10:27 -07:00
Arun Sharma
c4133e879b undef FORTIFY_SOURCE
It's a bit annoying to undefine at configure or compile time.

Signed-off-by: Arun Sharma <asharma@fb.com>
2011-10-15 23:10:00 -07:00
Arun Sharma
42b67080eb Fix linker errors with recent binutils
Without this, tests that called unw_getcontext() got a linker error

Signed-off-by: Arun Sharma <asharma@fb.com>
2011-10-15 23:03:46 -07:00
Arun
f89fb17695 Fix incorrect calls to memset.
Found when compiling libunwind with clang.

Signed-off-by: Paul Pluzhnikov <ppluzhnikov@google.com>
2011-10-02 22:43:28 -07:00
Arun Sharma
962366dace Fixup compile errors on ia64.
Suggested-by: Harald Servat <harald.servat@bsc.es>
2011-09-23 11:11:34 -07:00
Arun Sharma
ac0acd06f3 Bump up the library version 2011-09-10 19:57:59 -07:00
Arun Sharma
1d8e2c1ae5 Explicitly specify the libraries
Without this linking fails with gold and newer versions of ld.
2011-09-10 19:57:10 -07:00
Arun Sharma
3bf76e8d19 Installed include files can't include config.h
config.h is not copied to $DESTDIR after make install. ms-abi users
will need to manually define it for now.
2011-09-05 10:47:13 -07:00
Arun Sharma
00abb7c056 Reorder libraries in lib_LTLIBRARIES
This fixes a make install time problem.
2011-09-05 10:46:14 -07:00
Ken Werner
92327a3647 ARM: prefer to unwind using DWARF info
In case the user doesn't specify whether to unwind using the ARM specific
unwind tabler or DWARF info libunwind should prefer the latter. Since DWARF
expressions are more powerful than the ARM specific unwind tables
arm_find_proc_info is changed to check for DWARF first.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-29 17:58:52 +02:00
Ken Werner
912db91b05 ARM: Exit unw_step in case DWARF based unwinding was successful
Prevents unw_step from trying to unwind the stack using the ARM specific
unwind tables in case the DWARF based unwinding was successful.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-29 17:58:52 +02:00
Arun Sharma
e3c87a6261 Updates for 1.0
Drop the rc1
Fixup a typo in NEWS
2011-08-27 21:56:35 -07:00
Sven Neumann
f195c9ad52 Skip a few tests on uCLibC
Without this, the build fails on platforms that don't implement
backtrace().
2011-08-27 21:54:52 -07:00
Ken Werner
112c927371 ARM: Ensure unw_step returns whatever find_proc_info() returns
This allows the test-proc-info test case to pass on ARM.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-17 14:32:32 +00:00
Ken Werner
93e64550ac ARM: Fix return value of arm_find_proc_info
Initialize the return value with -1 in order prevent arm_find_proc_info from
returning zero. This could happen in case the environemtn variable
UNW_ARM_UNWIND_METHOD doesn't allow exidx and/or dwarf unwinding.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-17 14:14:48 +00:00
Arun Sharma
8ab8863e9f Bump up the package version.
Also updated the NEWS file.
2011-08-15 21:08:38 -07:00
Arun Sharma
4dbc2bcb94 Fix a compiler warning
backtrace() needs execinfo.h
2011-08-15 20:19:47 -07:00
Ken Werner
d83846f120 ARM: Initial support for remote unwinding using libunwind-ptrace
Change _UPTi_find_unwind_table to also look for the ARM specific unwind
information. Adjust the ARM unwind code to read memory using the accessor
routines.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-15 20:12:54 +02:00
Ken Werner
b317cb4829 Change libunwind-ptrace to also look for .debug_frame if nothing found in .eh_frame.
This changes the behavior of libunwind-ptrace to what we do for local
unwinding.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-15 20:12:54 +02:00
Ken Werner
545023c207 Rework the lookup of the ARM specific unwind info
Implement routines for finding the proc_info and searching the unwind table
for the ARM backend.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-15 20:12:54 +02:00
Ken Werner
0b9f591823 Make the dwarf dl_iterate_phdr callback available within libunwind.
Rename the dwarf dl_iterate_phdr callback routine and the callback_data
structure to dwarf_callback and dwarf_callback_data. Make it available
within libunwind by declaring the two at the dwarf.h header file.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-15 20:12:54 +02:00
Ken Werner
25f6b8295d Change address type from void* to unw_word_t.
Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-07-28 11:10:02 +00:00
Ken Werner
264b101905 Move arm_exidx_entry and arm_exidx_table structs from ex_tables.h into libunwind-arm.h.
Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-07-15 11:57:55 +00:00
Ken Werner
b28335b5a5 Fix inline assembly.
Remove the third colon if the clobber list is not present.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-06-30 12:36:44 +02:00
Arun Sharma
e09f9701ff Handle register nums > 16 on x86_64
gcc generates them when using ms-abi. Support disabled by
default since it increases the cache footprint of the library.
2011-06-18 20:48:49 -07:00
Joel Brobecker
7d43108f9c No libunwind-generic.so if configured with --disable-shared
Installing a libunwind that was configured with --disable-shared
results in a broken libunwind-generic.so link. This patch avoids
this broken link.
2011-06-18 19:50:39 -07:00
Joel Brobecker
ea7160a841 Remove unintended semi-colon in os-hpux.c fun definition
Probably a copy/paste error... This showed up on ia64-hpux.
2011-06-18 19:50:35 -07:00
Joel Brobecker
8d991d9258 Fix call to maps_next in _UPT_get_dyn_info_list_addr.c
A previous change reduced the number of arguments that this function
tasks, but one call at least did not get updated, resulting in a build
failure on ia64-linux.  This patch fixes it.
2011-06-18 19:50:31 -07:00
Joel Brobecker
e003e44a37 Check for <sys/ptrace.h> before including it
On ia64-hpux version 11.31, <sys/ptrace.h> has been removed.
This patch adds a configure check for this header file, and only
includes <sys/ptrace.h> if it exists.
2011-06-18 19:50:28 -07:00
Lassi Tuura
d2525ec936 Use single level hash table for fast trace. 2011-05-06 22:09:07 -07:00
Lassi Tuura
5c2cade264 Inline access to initial register values as it's known to be safe. 2011-05-06 20:19:36 -07:00
Ken Werner
36511d3d1f Add support for handling signal frames on ARM Linux.
This patch add support for resuming at a certain stack frame even if signal
frames are involved. For restoring the registers the trampoline (sigreturn)
is used. RT and non-RT signal frames are handled for both >=2.6.18 and
<2.6.18 kernels.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-05-03 20:18:40 +02:00
Ken Werner
9533ea1a6a Add support for RT signal frame detection on ARM.
This patch adds a few more patterns to the check that detects if the IP
points to a sigreturn sequence.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-05-03 20:18:33 +02:00
Ken Werner
1e10c2931d Add initial support for local unw_resume on ARM Linux.
Provides basic support for resuming execution at a certain stack frame.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-04-21 17:25:42 +02:00
Ken Werner
288f18f7ae ARM: tests/Gtest-dyn1.c workaround for GCC bug.
Temporarily workaround for a GCC bug that prevents code from obtaining the
thumb marker: https://bugs.launchpad.net/gcc-linaro/+bug/721531.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-04-21 17:25:42 +02:00
Ken Werner
3b917f2d16 ARM: tests/Gtest-dyn1.c fixes.
Define an appropriate fdesc struct and its corresponding accessors that take
care of the thumb marker on ARM. Call the __clear_cache built-in instead of
flush_cache if the GNU compiler is used.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-04-21 17:25:42 +02:00
Ken Werner
a624812e2a ARM: tests/Gtest-trace.c - IP printing
Print the instruction pointer on ARM as well.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-04-21 17:25:42 +02:00
Ken Werner
d589e20506 Add the appropriate libraries to the *_LDADD variables.
The test-async-sig.c, test-flush-cache.c and Ltest_resume_sig.c define
UNW_LOCAL_ONLY and therefore only need LIBUNWIND_local. Gtest-dyn1.c is
calling '_U_dyn_cancel' and test-trace.c is using 'unw_backtrace' which
are in LIBUNWIND_local.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-04-21 17:25:42 +02:00
Lassi Tuura
ae5c1f2adf Performance optimisations for fast trace.
Insert static branch prediction predicates in useful places and avoid
unnecessary code in the hottest paths. Bypass unnecessary indirect
calls, in particular to access_mem(), when known to be safe.
2011-04-17 20:34:38 -07:00
Arun Sharma
e2962af9d3 Implement a cheaper getcontext()
Since the fast unwinding code path doesn't need the full context,
a faster target dependent getcontext is implemented.

Signed-off-by: Lassi Tuura <lat@cern.ch>
2011-04-05 22:07:05 -07:00
Arun Sharma
15f182828d Use __thread instead of pthread_getspecific() 2011-04-05 22:06:51 -07:00
Ken Werner
171e3e51f4 Add tests/[GL]perf-trace to the .gitignore file.
Prevents 'git status' from listing the tests/[GL]perf-trace.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-04-05 20:59:10 -07:00
Ken Werner
e4593e2493 Increase alternate signal stack size.
Creating an alternate signal stack with a size of SIGSTKSZ (usually 8k) is
not enough on some targets because unw_cursor_t is bigger than that already.
Since the size of unw_cursor_t is part of the ABI the UNW_TDEP_CURSOR_LEN
can't be changed without breaking existent code. Therefore size of the
alternate signal stack has been increased to 1 MiB.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-04-05 20:59:10 -07:00
Ken Werner
fd21d07fe4 Create a generic and local variant of the extbl parser.
In order to have the DWARF_* macros working properly a generic and a local
variant of the ex_tables.c have been created.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-04-05 20:59:10 -07:00