We can use the __sync builtin atomics also on other architectures than
IA64. GCC 4.7 documentation notes that these builtins are ``legacy'' --
adding support for the newer GCC __atomic atomics should be fairly easy.
Instead of maintaining a pointer to the `sos_memory' array, maintain an
index that tells the next free position. When atomic operations are
available, the allocation boils down to a single fetch-and-add
operation.
Rename the `ALIGN' macro to `UNW_ALIGN', and move it from
`_UCD_internal.h' to `libunwind_i.h' so that we can share it with the
mempool code. `ALIGN' was clashing with system headers on FreeBSD:
In file included from src/coredump/_UCD_access_reg_freebsd.c:26:
src/coredump/_UCD_internal.h:102:1: warning: "ALIGN" redefined
In file included from /usr/include/sys/param.h:115,
from src/coredump/_UCD_lib.h:52,
from src/coredump/_UCD_access_reg_freebsd.c:24:
/usr/include/machine/param.h:79:1: warning: this is the location of the previous definition
This is a common part of struct UPT_info
and struct UCD_info (to be introduced later).
Make _UPTi_find_unwind_table function operate only on this part
of struct UPT_info.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Define GNU and processor specific values for the Phdr p_type field in case
they aren't defined by <elf.h> already.
Signed-off-by: Ken Werner <ken.werner@linaro.org>
This change prevents libunwind_i.h from using a self-defined MAP_ANONYMOUS and
therefore avoids collisions in case the system header gets pulled in later.
Signed-off-by: Ken Werner <ken.werner@linaro.org>
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.
Greetings,
Here is the second part, actually implementing the configure option.
Thanks,
--
Paul Pluzhnikov
commit cf823ed0d4d2447aa91af0e3cb5fbb6a6cba5068
Author: Paul Pluzhnikov <ppluzhnikov@google.com>
Date: Mon Sep 21 11:37:38 2009 -0700
New configure option to allow caller to block signals.
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.
