| 7d46a21e0a2cb561e4cad57b101a7137e01023dc |
|
14-Nov-2013 |
Christopher Ferris <cferris@google.com> |
For current process, check memory accesses.
When attempting to unwind the current process, the library simple reads and
writes to memory for memory accesses. Unfortunately, if an unwind winds up
with invalid data, then the process can segfault. Add a guard to all memory
accesses that verifies that reads/writes are valid before attempting them.
For now, this guard is a nop on all systems except linux systems.
Also, modify the adjust_ip function to use the access_mem function
so that all reads go through the right function.
Bug: 11652982
Change-Id: I9d1feacae585374f6bf1d899f8a006ec9ecb47c4
/external/libunwind/src/os-linux.h
|
| 890e23eb9d3ffd9be2a025189a21794b5ed0e0ff |
|
21-Sep-2012 |
Tommi Rantala <tt.rantala@gmail.com> |
Prefer NULL over zero
/external/libunwind/src/os-linux.h
|
| 851f14281c2fefb596c8e6b2e356c553a3f5cc87 |
|
30-Oct-2011 |
Arun Sharma <asharma@fb.com> |
Fix some compiler warnings
/external/libunwind/src/os-linux.h
|
| 6a072982ddd0b8c1597ac2aa17559732c8b5e763 |
|
02-Mar-2011 |
Zachary T Welch <zwelch@codesourcery.com> |
Fix file descriptor leakage in maps_init
If mmap fails, be sure to close the maps file before returning an error.
Signed-off-by: Zachary T Welch <zwelch@codesourcery.com>
Signed-off-by: Ken Werner <ken.werner@linaro.org>
/external/libunwind/src/os-linux.h
|
| 5a1d3c6fd765e45b97f478c9db3a2d4cdaa75c69 |
|
22-Feb-2010 |
Arun Sharma <aruns@google.com> |
Remove bogus check on scan_string which is guaranteed to fail every time.
/external/libunwind/src/os-linux.h
|
| b56375e76a0e23b6e464d994bc6a790e086b91db |
|
07-Oct-2009 |
Paul Pluzhnikov <ppluzhnikov@google.com> |
Reduce stack use and apply CONFIG_DEBUG_FRAME to more code.
Currently, libunwind allocates several PATH_MAX entries on stack, while
trying to find a binary via /proc/.../maps.
However stack space may be at premium (especially when sigaltstack is used),
and PATH_MAX on Linux is 4096, while SIGSTKSZ is only 8192 on x86.
Attached patch eliminates multiple PATH_MAX stack allocations, and simplifies
code in maps_next, at the cost of being unable to do anything if we can't
mmap one page. It appears to me that under such low-memory conditions,
libunwind will fail shortly elsewhere anyway.
This patch also disables more of debug_frame-handling code when
CONFIG_DEBUG_FRAME is undefined.
Tested on Linux/x86_64 with and without CONFIG_DEBUG_FRAME, no regressions.
/external/libunwind/src/os-linux.h
|
| 253f3e57386cea5b4877a92d11038f9b6ad0444d |
|
18-Oct-2007 |
Curt Wohlgemuth <curtw@cup.hp.com> |
[Linux] Fix potentially overlapping memory-copy to use memmove() instead
of memcpy().
/external/libunwind/src/os-linux.h
|
| 03e05b41386fd5797cb8cd62eff7f0ba77c4e07e |
|
22-Aug-2007 |
David Mosberger-Tang <davidm@panda.mostang.com> |
Fix two minor compiler-warnings.
/external/libunwind/src/os-linux.h
|
| af2503e2230f59a8b87ae5b71ef57e7e18b24a98 |
|
26-Jul-2006 |
David Mosberger-Tang <davidm@koala.localdomain> |
Fix bug in libunwind-ptrace which can cause reading of random data.
(maps_next): After reading less than a full buffer of data, copy
remaining data to the top of the buffer so as to maintain the
invariant that all data between mi->buf and mi->buf_end is valid.
This avoids maps_next() parsing uninitialized data.
/external/libunwind/src/os-linux.h
|
| 6c61288b9c5b3c967937d9ab12113bc7e368e433 |
|
29-Jun-2004 |
hp.com!davidm <hp.com!davidm> |
(scan_dec): Don't skip over a character unless it's really a digit.
(scan_char): Don't skip over NUL terminator.
(Logical change 1.238)
/external/libunwind/src/os-linux.h
|
| 2f210753bd631692bd93f4d0a90e9195424075b9 |
|
21-Apr-2004 |
mostang.com!davidm <mostang.com!davidm> |
(maps_init): Correct initialization of mi->buf.
(maps_close): Don't forget to unmap mi->buf if it's non-NULL.
(Logical change 1.209)
/external/libunwind/src/os-linux.h
|
| 5de4b351e7624889db611e10dd3034e0176db5ee |
|
21-Apr-2004 |
mostang.com!davidm <mostang.com!davidm> |
(struct map_iterator): Add members "buf_size", "buf", and "buf_end".
(maps_init): Try to mmap() a one-page buffer and, if successful,
initialize the new map_iterator members based on it.
(maps_next): If the one-page buffer is available, use it to read
/proc/PID/maps. This avoids expensive lseek() calls which,
in the case of /proc lead to T(n) = O(n^2) behavior.
(Logical change 1.208)
/external/libunwind/src/os-linux.h
|
| 64c702cea7c2de53ff1ff93dfe76e065036b4e3e |
|
31-Mar-2004 |
mostang.com!davidm <mostang.com!davidm> |
(ltoa): New inline function.
(skip_whitespace): Likewise.
(scan_hex): Likewise.
(scan_dec): Likewise.
(scan_char): Likewise.
(scan_string): Likewise.
(maps_init): Avoid stdio operations since they're not async-signal
safe.
(maps_next): Likewise.
(maps_close): Likewise.
(Logical change 1.199)
/external/libunwind/src/os-linux.h
|
| cfded02a05f7fd5314ca4619b53005955a60acee |
|
29-Mar-2003 |
hp.com!davidm <hp.com!davidm> |
(maps_close): Do nothing if mi->fp is already NULL.
(Logical change 1.71)
/external/libunwind/src/os-linux.h
|
| 824d6619b500a86ff2fc680268357f0215d59b0c |
|
08-Feb-2003 |
mostang.com!davidm <mostang.com!davidm> |
(Logical change 1.45)
/external/libunwind/src/os-linux.h
|
| 5f94e2d488701fccd474245df3ad6f51aff2a05e |
|
08-Feb-2003 |
mostang.com!davidm <mostang.com!davidm> |
Initial revision
/external/libunwind/src/os-linux.h
|