mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-22 07:37:38 +01:00
201 lines
6.3 KiB
Text
201 lines
6.3 KiB
Text
-*- mode: Outline -*-
|
|
|
|
This is version 0.99 of the unwind library. This library supports
|
|
several architecture/operating-system combinations:
|
|
|
|
Linux/IA-64: Fully tested and supported.
|
|
Linux/x86-64: Works well.
|
|
Linux/x86: Works well, but C library is missing some unwind-info.
|
|
Linux/PARISC: Works well, but C library missing unwind-info.
|
|
HP-UX/IA-64: Mostly works but known to have some serious limitations.
|
|
Linux/PPC64: Newly added.
|
|
|
|
|
|
* General Build Instructions
|
|
|
|
In general, this library can be built and installed with the following
|
|
commands:
|
|
|
|
$ autoreconf -i # Needed only for building from git. Depends on libtool.
|
|
$ ./configure
|
|
$ make
|
|
$ make install prefix=PREFIX
|
|
|
|
where PREFIX is the installation prefix. By default, a prefix of
|
|
/usr/local is used, such that libunwind.a is installed in
|
|
/usr/local/lib and unwind.h is installed in /usr/local/include. For
|
|
testing, you may want to use a prefix of /usr/local instead.
|
|
|
|
|
|
* Building with Intel compiler
|
|
|
|
** Version 8 and later
|
|
|
|
Starting with version 8, the preferred name for the IA-64 Intel
|
|
compiler is "icc" (same name as on x86). Thus, the configure-line
|
|
should look like this:
|
|
|
|
$ ./configure CC=icc CFLAGS="-g -O3 -ip" CXX=icc CCAS=gcc CCASFLAGS=-g \
|
|
LDFLAGS="-L$PWD/src/.libs"
|
|
|
|
|
|
* Building on HP-UX
|
|
|
|
For the time being, libunwind must be built with GCC on HP-UX.
|
|
|
|
libunwind should be configured and installed on HP-UX like this:
|
|
|
|
$ ./configure CFLAGS="-g -O2 -mlp64" CXXFLAGS="-g -O2 -mlp64"
|
|
|
|
Caveat: Unwinding of 32-bit (ILP32) binaries is not supported
|
|
at the moment.
|
|
|
|
** Workaround for older versions of GCC
|
|
|
|
GCC v3.0 and GCC v3.2 ship with a bad version of sys/types.h. The
|
|
workaround is to issue the following commands before running
|
|
"configure":
|
|
|
|
$ mkdir $top_dir/include/sys
|
|
$ cp /usr/include/sys/types.h $top_dir/include/sys
|
|
|
|
GCC v3.3.2 or later have been fixed and do not require this
|
|
workaround.
|
|
|
|
* Building for PowerPC64 / Linux
|
|
|
|
For building for power64 you should use:
|
|
|
|
$ ./configure CFLAGS="-g -O2 -m64" CXXFLAGS="-g -O2 -m64"
|
|
|
|
If your power support altivec registers:
|
|
$ ./configure CFLAGS="-g -O2 -m64 -maltivec" CXXFLAGS="-g -O2 -m64 -maltivec"
|
|
|
|
To check if your processor has support for vector registers (altivec):
|
|
cat /proc/cpuinfo | grep altivec
|
|
and should have something like this:
|
|
cpu : PPC970, altivec supported
|
|
|
|
If libunwind seems to not work (backtracing failing), try to compile
|
|
it with -O0, without optimizations. There are some compiler problems
|
|
depending on the version of your gcc.
|
|
|
|
|
|
* Regression Testing
|
|
|
|
After building the library, you can run a set of regression tests with:
|
|
|
|
$ make check
|
|
|
|
** Expected results on IA-64 Linux
|
|
|
|
Unless you have a very recent C library and compiler installed, it is
|
|
currently expected to have the following tests fail on IA-64 Linux:
|
|
|
|
Gtest-init (should pass starting with glibc-2.3.x/gcc-3.4)
|
|
Ltest-init (should pass starting with glibc-2.3.x/gcc-3.4)
|
|
test-ptrace (should pass starting with glibc-2.3.x/gcc-3.4)
|
|
run-ia64-test-dyn1 (should pass starting with glibc-2.3.x)
|
|
|
|
This does not mean that libunwind cannot be used with older compilers
|
|
or C libraries, it just means that for certain corner cases, unwinding
|
|
will fail. Since they're corner cases, it is not likely for
|
|
applications to trigger them.
|
|
|
|
Note: If you get lots of errors in Gia64-test-nat and Lia64-test-nat, it's
|
|
almost certainly a sign of an old assembler. The GNU assembler used
|
|
to encode previous-stack-pointer-relative offsets incorrectly.
|
|
This bug was fixed on 21-Sep-2004 so any later assembler will be
|
|
fine.
|
|
|
|
** Expected results on x86 Linux
|
|
|
|
The following tests are expected to fail on x86 Linux:
|
|
|
|
Gtest-resume-sig (fails to get SIGUSR2)
|
|
Ltest-resume-sig (likewise)
|
|
Gtest-dyn1 (no dynamic unwind info support yet)
|
|
Ltest-dyn1 (no dynamic unwind info support yet)
|
|
test-setjmp (longjmp() not implemented yet)
|
|
run-check-namespace (no _Ux86_getcontext yet)
|
|
test-ptrace
|
|
|
|
** Expected results on x86-64 Linux
|
|
|
|
The following tests are expected to fail on x86-64 Linux:
|
|
|
|
Gtest-dyn1 (no dynamic unwind info support yet)
|
|
Ltest-dyn1 (no dynamic unwind info support yet)
|
|
Gtest-init (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18743)
|
|
Ltest-init (likewise)
|
|
test-async-sig (crashes due to bad unwind-info?)
|
|
test-setjmp (longjmp() not implemented yet)
|
|
run-check-namespace (no _Ux86_64_getcontext yet)
|
|
run-ptrace-mapper (??? investigate)
|
|
run-ptrace-misc (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18748
|
|
and http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18749)
|
|
|
|
** Expected results on PARISC Linux
|
|
|
|
Caveat: GCC v3.4 or newer is needed on PA-RISC Linux. Earlier
|
|
versions of the compiler failed to generate the exception-handling
|
|
program header (GNU_EH_FRAME) needed for unwinding.
|
|
|
|
The following tests are expected to fail on x86-64 Linux:
|
|
|
|
Gtest-bt (backtrace truncated at kill() due to lack of unwind-info)
|
|
Ltest-bt (likewise)
|
|
Gtest-resume-sig (Gresume.c:my_rt_sigreturn() is wrong somehow)
|
|
Ltest-resume-sig (likewise)
|
|
Gtest-init (likewise)
|
|
Ltest-init (likewise)
|
|
Gtest-dyn1 (no dynamic unwind info support yet)
|
|
Ltest-dyn1 (no dynamic unwind info support yet)
|
|
test-setjmp (longjmp() not implemented yet)
|
|
run-check-namespace (toolchain doesn't support HIDDEN yet)
|
|
|
|
** Expected results on HP-UX
|
|
|
|
"make check" is currently unsupported for HP-UX. You can try to run
|
|
it, but most tests will fail (and some may fail to terminate). The
|
|
only test programs that are known to work at this time are:
|
|
|
|
tests/bt
|
|
tests/Gperf-simple
|
|
tests/test-proc-info
|
|
tests/test-static-link
|
|
tests/Gtest-init
|
|
tests/Ltest-init
|
|
tests/Gtest-resume-sig
|
|
tests/Ltest-resume-sig
|
|
|
|
** Expected results on PPC64 Linux
|
|
|
|
"make check" should run with no more than 10 out of 24 tests failed.
|
|
|
|
|
|
* Performance Testing
|
|
|
|
This distribution includes a few simple performance tests which give
|
|
some idea of the basic cost of various libunwind operations. After
|
|
building the library, you can run these tests with the following
|
|
commands:
|
|
|
|
$ cd tests
|
|
$ make perf
|
|
|
|
* Contacting the Developers
|
|
|
|
Please direct all questions regarding this library to:
|
|
|
|
libunwind-devel@nongnu.org
|
|
|
|
You can do this by sending a mail to libunwind-request@nongnu.org with
|
|
a body of:
|
|
|
|
subscribe libunwind-devel
|
|
|
|
or you can subscribe and manage your subscription via the
|
|
web-interface at:
|
|
|
|
https://savannah.nongnu.org/mail/?group=libunwind
|