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142 lines
4.7 KiB
Text
142 lines
4.7 KiB
Text
-*-Mode: outline-*-
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* News for v0.98:
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** Update libunwind to be compliant with the updated/expanded
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ia64 unwind specificiation by HJ Lu [1]. This is needed for
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GCC 3.4 compatibility.
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[1] http://www.kernel.org/pub/linux/devel/gcc/unwind/
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** Initial support for x86-64 has been added courtesy of Max Asbock.
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Along with this came a bunch of DWARF2 unwinder fixes.
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** A new rountine unw_strerror() has been added courtesy of
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Thomas Hallgren.
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** Including <libunwind.h> now defines 4 macros that can be used
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to determine the version number of libunwind. Specifically,
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UNW_VERSION_MAJOR, UNW_VERSION_MINOR, UNW_VERSION, and
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UNW_VERSION_CODE are defined by the header now.
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** Bug fixes
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*** Fix a memory-leak in _UPT_get_dyn_info_list_addr() courtesy of Ed Connell.
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*** Fix a crash in libunwind-ptrace courtesy of Mark Young.
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*** Fix a bug in ia64-version of unw_init_remote() which prevented
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it from working correctly for the local address space. Reported by
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Troy Heber.
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*** Many other small and not so small fixes.
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* News for v0.97:
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** unw_get_proc_name() may now be called from signal-handler.
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** The ptrace-helper routines are now declared in libunwind-ptrace.h.
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Applications which use ptrace-based unwinding should include
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<libunwind-ptrace.h> to get the _UPT_*() routines declared.
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** libunwind has been split into a "local-only" and a "generic" versions.
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The former is optimized for local unwinding (within a process) and
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is called libunwind.so (shared version) or libunwind.a (archive
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version). The generic version is not limited to unwinding within a
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process and is called libunwind-generic.so (shared version)
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libunwind-generic.a (archive version). Similarly, the ptrace()
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support has been separated out into a convenience library called
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libunwind-ptrace.a. For the most part, backwards-compatibility
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is retained. However, when building an application which uses
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libunwind, it may be necessary to change the linker command-line
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as shown in the table below:
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Application which does: Before v0.97: With v0.97:
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----------------------- ------------- -----------
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local unwinding only: -lunwind -lunwind
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remote unwinding: -lunwind -lunwind-generic
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cross unwinding: -lunwind-PLAT -lunwind-PLAT
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ptrace-based unwinding: -lunwind -lunwind-ptrace -lunwind-generic
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The motivation for this splitting is to keep libunwind.so as minimal
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as possible. This library will eventually be loaded by most (if not
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all) executables and hence it is important to ensure that it can
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be loaded as quickly as possible.
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** unw_getcontext() tuned on IA-64.
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The unw_getcontext() routine used to be provided by (GNU) libc
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(getcontext()). This caused unnecessary overhead (e.g., an
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unnecessary system-call to sigprocmask()). The new
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unw_getcontext() only does the work really needed for libunwind and
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hence performs much better. However, this change implies that
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programs linked against libunwind v0.97 won't be
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backwards-compatible with earlier versions (there would be an
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unresolved symbol for _Uia64_getcontext()).
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** Fix NaT-bit handling on IA-64.
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New test-cases have been added to test the handling of the NaT bit
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(and floating-point NaT values) and all discovered/known bugs have
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been fixed.
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** Initial DWARF-based unwinder for x86.
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There is a beginning for a DWARF-based unwinder for x86. Work for
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x86-64-support based on this DWARF unwinder is currently underway
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at IBM and it is expected that this support will be merged into the
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official tree soon.
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* News for v0.96:
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** _Unwind_*() routines defined by the C++ ABI are now included in
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libunwind.
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* News for v0.95:
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** Bigger, better, faster, or so the theory goes.
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* News for v0.93:
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** More bug-fixes & improved HP-UX support.
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* News for v0.92:
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** Bug-fix release. IA-64 unwinder can now be built with Intel compiler (ECC).
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* News for v0.91:
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** Lots of documentation updates
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** Some portability fixes.
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* News for v0.9:
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** The libunwind API is mostly feature-complete at this point (hence the
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version jump from v0.2 to v0.9).
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* News for v0.2:
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** Automated configuration/build with autoconf and automake.
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** Added support for building libunwind as a shared library.
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** Added support for remote unwinding.
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** Added support for cross-building.
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** Added two new routines to the API:
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- unw_is_fpreg()
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- unw_get_save_loc()
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** Added multi-architecture supports (lets a single application use
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the unwind libraries for multiple target architectures; this is useful,
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e.g., useful for building a debugger that can support multiple targets
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such as x86, ia64, etc.)
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* News for v0.1:
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** Added support for exception handling.
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* News for v0.0:
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** It's a brand new package.
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