| b5ab7580d01cab4d090784f1351d1b3895a60f23 |
|
19-Apr-2016 |
Christopher Ferris <cferris@google.com> |
Update address space of map if it changes.
In debuggerd, a single BacktraceMap is created that is used to unwind
all of the threads in the process. Unfortunately, the address space
data can be cached in the libunwind copy of the map data. However, the
address space is only valid in the Backtrace object and does not survive
across unwinds. This can lead to a crash when a cached map that is only
present in memory tries to access the already destroyed address space.
The fix is to update the address space, if necessary, whenever a
cached map that only exists in memory is about to be used.
Bug: 28210681
Change-Id: I3cedb043aed499f3eb27f9838d040be77dc92d9a
/external/libunwind/src/elfxx.h
|
| 6292bbbc3f678648fb5a1ec8222d33f6a5bb992a |
|
02-Mar-2016 |
Christopher Ferris <cferris@google.com> |
Ignore compressed sections on local unwinds.
When doing local unwinds, attempts to work on compressed sections is
not necessary since this is only called from ART. ART already dumps the
java stacks and that's the only compressed sections that will be used.
It turns out that trying to process the compressed section in local unwinds
can cause problems since the uncompressed section can be large, which
means suddenly a lot more memory being consumed by the process. It also
takes extra time to complete the unwind, which can cause problems when
an ANR occurs, which might trigger a cascade of ANRs since the unwind
is so cpu intensive.
Bug: 27391690
Change-Id: I98be5754cc4de4071616db334dc0c9862d3a2504
/external/libunwind/src/elfxx.h
|
| 164059ed9cd0efbea262cf3b74b2aed41689ae91 |
|
19-Feb-2016 |
Christopher Ferris <cferris@google.com> |
Fix the caching of the compressed section.
A previous change fixed a race condtion, but caused a big memory
leak of the compressed section data. In order to fix this, move
the caching of the compressed section at the point that we cache
the elf image data itself.
Bug: 27152097
(cherry picked from commit c5017fdb02aa2a9c87c059c9263e5dfc390da289)
Change-Id: Ib9e4342acf591fdaaf05fd7fabb6bc0b02b8f3f1
/external/libunwind/src/elfxx.h
|
| 1aaf3b45edb306600589f5a3969d7a7004798823 |
|
10-Feb-2016 |
Christopher Ferris <cferris@google.com> |
Make sure that elf_image structure is copied.
A previous change modified the code so that a pointer to the elf_image
structure from the map data was returned instead of copied. This can
cause a race condition when doing local unwinds if the map needs to be
rebuilt. One thread might have a pointer to a freed data structure.
To fix this, make sure that the elf_image is always copied when the
contents are going to be used.
In addition, remove the map pointer in the mapped data because it could
also be stale when a local unwind causes a map rebuild. Add a big comment
in front of the elf_image structure to explain this so it won't happen
again.
Bug: 27123610
(cherry picked from commit 2c0f916cac65c1a14e9a917452a430c490ff9620)
Change-Id: I162b396c24923fe9e3d774488b221244d822096c
/external/libunwind/src/elfxx.h
|
| 344ee5841222c15cbc8a91e1f75e6f6f02d7d234 |
|
11-May-2015 |
David Srbecky <dsrbecky@google.com> |
Decompress debug symbols.
Debug symbols may be stored in LZMA compressed section .gnu_debugdata.
libunwind already contained some support for it however it was
disabled at compile time. This CL re-enables it and extends it.
The decompression code is based on LZMA SDK.
Change-Id: Ie199ce1fc31770940db288b5e57b50942f12be7b
/external/libunwind/src/elfxx.h
|
| 38de87fa176fb72dd0db0fd7ad400eb95712482b |
|
16-Jan-2016 |
Christopher Ferris <cferris@google.com> |
Ignore non-exec and /dev/ maps.
When caching elf maps, do not try and cache a map that is not readable
and writable or is in /dev/. The only exception is to allow caching
maps which begins with /dev/ashmem/.
Bug: 26589772
Change-Id: I670bc5869d125f48f72ee583156db1d4806ca7b9
/external/libunwind/src/elfxx.h
|
| 4a9fd609328bb843b31d96bd8b3041eff4538ca6 |
|
19-Aug-2015 |
Nicolas Geoffray <ngeoffray@google.com> |
Revert "Update all mapoff checks to check against 0."
Makes ART's cfi-test fail.
This reverts commit 4a4ba40ed815be9307ac64023565d5b22c7fdf39.
Change-Id: I0698a2e37f9fe0a54695a7a8f99c4e23b2478f47
/external/libunwind/src/elfxx.h
|
| 4a4ba40ed815be9307ac64023565d5b22c7fdf39 |
|
14-Aug-2015 |
Christopher Ferris <cferris@google.com> |
Update all mapoff checks to check against 0.
The dlopen of a shared library from an apk results in huge non-zero
map offsets. This can cause failures due to the checks in the code
of the map offset against the elf data.
We don't really support a non-zero offset for an executable map,
so it's easier to assume this is always zero.
Bug: 23192251
Change-Id: Ie4c34ed5c181135ecd3fe7c968b4a424f8eb34b9
/external/libunwind/src/elfxx.h
|
| 44387e81c0e2a029f6bfe54cbdbd345b1a22cf93 |
|
14-May-2015 |
Christopher Ferris <cferris@google.com> |
Fix missing return in failure case.
Bug: 19517541
Change-Id: I4b21835ee8f2e604152a6436693461cc24ddb745
/external/libunwind/src/elfxx.h
|
| ae38b20031a02d3f6f56a8315c1f097ae5293c56 |
|
04-May-2015 |
Christopher Ferris <cferris@google.com> |
Implement method to read elf data from memory.
I rewrote the entirety of elfxx.h/elfxx.c to support this.
For the rewrite, I modified the way that the symbol tables are searched.
The searched every single entry in the symbol table, and all symbol tables.
The new method finds the first entry that actually has a name and stops.
I also added some quick checks to make sure that a malformed elf would
not cause a crash when reading the symbol names from the symbol tables.
I had to implement the functionality of dwarf_find_unwind_table to handle
reading from memory, instead of from a file. I didn't implement debug frame
support since that likelihood of that appearing in memory seems low.
I also modified the dwarf_find_unwind_table to remove an abort and just
fail if that particular path is encountered. In addition, I added a quick
check to make sure that a malformed dynamic section doesn't cause a crash.
Bug: 19517541
Change-Id: I6075d87035dca41fa5e5dfcbe287a680a7671836
/external/libunwind/src/elfxx.h
|
| f4a8df5f4f338f1a12c25213227e98b34b42447f |
|
08-Mar-2014 |
Christopher Ferris <cferris@google.com> |
Fix maps caching for local processes.
It is possible for the map to change while running libunwind. For example,
if lots of threads are doing local unwinds at the same time. Allow the
cached map to regenerate when it detects this case.
Included in this change is a refactor of all of the os code so that it can
also be used to do caching. This is a prelude to being able to attempt to
push the code upstream.
Also, this moves the code back closer to the original upstream code.
Hopefully, this will allow me to upstream all of these changes.
Change-Id: Ia219fa61e16e36416133bc95b1dd2161bd5b8ff7
/external/libunwind/src/elfxx.h
|
| 2c3444d0f4821b159d60290c514a8aeba8d9061f |
|
21-Sep-2013 |
Masatake YAMATO <yamato@redhat.com> |
Remove one of duplicated declarations of `get_proc_name'
Declarations of `get_proc_name' of is duplicated.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
/external/libunwind/src/elfxx.h
|
| d41a453bbf195818e3fa66ed0a123f0c06aa754b |
|
19-May-2013 |
Arun Sharma <asharma@fb.com> |
Fix a build error
<elf.h> needs to be included before the check for ELF_CLASS.
/external/libunwind/src/elfxx.h
|
| eac65dc9b8cc18fa4c65c0485878a11c470357b6 |
|
15-Apr-2013 |
Matt Fischer <matt.fischer@garmin.com> |
Add basic support for the QNX operating system
This change adds some special cases to allow libunwind to compile
for QNX.
* QNX's copy of <elf.h> and <link.h> reside in sys/ instead. To deal
with this, an AC_CHECK_HEADERS() was added to check for the files
in both locations.
* Similarly, QNX does not have <endian.h>. In cases where the file is
not found, logic was added to refer to QNX-specific macros to determine
endianness.
* The QCC compiler, which is a wrapper around GCC, cannot handle some
standard GCC options. Therefore, logic was added to check for QCC,
and when it is found, to suppress the use of -lgcc, and to express the
option -nostartfiles as -Wc,-nostartfiles instead, which is correctly
passed on to the underlying GCC.
* Finally, the support file os-qnx.c was added, patterned after the existing
os-*.c files. Only local image lookup is currently supported (see the
comments for more information), but this is sufficient for QNX, since
ptrace is not supported there anyway, and that is the only case where the
function is required to do remote image lookup.
Change-Id: Ie7934f94a7317bdde59335f2acd4c3a97c0384c1
/external/libunwind/src/elfxx.h
|
| d276b7a9614987495a7dfb056e6558f452ebe802 |
|
13-Mar-2012 |
Arun Sharma <asharma@fb.com> |
Introduce get_proc_name_in_image()
This is similar to get_proc_name() but takes an already mapped
image.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
/external/libunwind/src/elfxx.h
|
| 3d08506936d16401aade168de0c95646b3f54a94 |
|
13-Feb-2012 |
Arun Sharma <asharma@fb.com> |
Fix undefined symbol: _Uelf64_valid_object
Without this change, we end up building libunwind-${arch}.a with
missing symbols.
Signed-off-by: Jan Kratochvil <jan.kratochvil@redhat.com>
/external/libunwind/src/elfxx.h
|
| ffc474b8c8972200642acaef3e5aa10ee853609a |
|
15-Mar-2011 |
Zachary T Welch <zwelch@codesourcery.com> |
Add module for parsing ARM-specific unwind tables
Handles lookup, extracting unwind entries, and decoding the entry
using a callback mechanism.
Signed-off-by: Ken Werner <ken.werner@linaro.org>
/external/libunwind/src/elfxx.h
|
| a83e96cc1cc48c6c229d9462ab13ef6479a84143 |
|
24-Jan-2011 |
Arun Sharma <asharma@fb.com> |
Some entries in /proc/<pid>/maps are not ELF files, so add check
in elf_map_image() to ensure mapped files have a valid ELF header.
Signed-off-by: Zachary T Welch <zwelch@codesourcery.com>
Signed-off-by: Arun Sharma <asharma@fb.com>
/external/libunwind/src/elfxx.h
|
| e6b9f350f78ecd9ef3b8a3e721f9435c94fc2562 |
|
22-Aug-2007 |
David Mosberger-Tang <davidm@panda.mostang.com> |
Introduce a tdep_get_func_addr_hook() in the ELF lookup_symbol()
routine and add address-space argument. This is needed because on
PPC64, a the function-name symbol refers to a function descriptor
(unlike, for example, on ia64, where the @fptr() operator is needed to
refer to a function descriptor). Thus, in order to look up the name
of a function, we need to dereference the function descriptor. To
make matters more "interesting", the function descriptors are normally
resolved by the dynamic linker, so we can't get their values from the
ELF file. Instead, we have to read them from the running image, hence
the need for the address-space argument.
/external/libunwind/src/elfxx.h
|
| 5724bee8c27219ac277ea76d75dc70fa830eaac0 |
|
20-May-2005 |
hp.com!davidm <hp.com!davidm> |
Include "libunwind_i.h" instead of "internal.h".
(Logical change 1.294)
/external/libunwind/src/elfxx.h
|
| b9d2cc7919cf343596fd007506492621311b1c43 |
|
21-Dec-2003 |
mostang.com!davidm <mostang.com!davidm> |
Drop HIDDEN from declarations, only the definitions need it.
(Logical change 1.150)
/external/libunwind/src/elfxx.h
|
| 4fafd8cbf7464f50b30e2983e332ddebef8b5acc |
|
20-Dec-2003 |
hp.com!davidm <hp.com!davidm> |
Use Elf_W() instead of ElfW() etc. to avoid clash with <linker.h>.
(Logical change 1.141)
/external/libunwind/src/elfxx.h
|
| 9c23f9c408a10b9cbe44002d87755ad020aac91a |
|
03-Apr-2003 |
mostang.com!davidm <mostang.com!davidm> |
(elf_map_image): Declare "path" argument as "const".
(Logical change 1.75)
/external/libunwind/src/elfxx.h
|
| 63d7003ef7c8f791d52cd88add0cee0d72cb6a5f |
|
19-Mar-2003 |
mostang.com!davidm <mostang.com!davidm> |
Include <sys/stat.h>.
(Logical change 1.63)
/external/libunwind/src/elfxx.h
|
| a3806e7c16dd8e988507a7dab037cd99e74277a7 |
|
27-Feb-2003 |
mostang.com!davidm <mostang.com!davidm> |
(get_proc_name): Add "pid" argument.
(Logical change 1.56)
/external/libunwind/src/elfxx.h
|
| 824d6619b500a86ff2fc680268357f0215d59b0c |
|
08-Feb-2003 |
mostang.com!davidm <mostang.com!davidm> |
(Logical change 1.45)
/external/libunwind/src/elfxx.h
|
| 5f94e2d488701fccd474245df3ad6f51aff2a05e |
|
08-Feb-2003 |
mostang.com!davidm <mostang.com!davidm> |
Initial revision
/external/libunwind/src/elfxx.h
|