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2004/12/04 17:00:04-08:00 hp.com!davidm Gtest-exc is now working on PA Linux. 2004/12/02 18:37:47-08:00 hp.com!davidm Update introduction. Add PARISC Linux "expected results" section. 2004/11/30 22:44:47-08:00 mostang.com!davidm Updated expected results for x86 and x86-64. 2004/11/17 02:43:39-08:00 mostang.com!davidm Update x86 Linux test-suite status. (Logical change 1.290)
204 lines
6.6 KiB
Text
204 lines
6.6 KiB
Text
-*- mode: Outline -*-
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This is version 0.99 of the unwind library. This library supports
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several architecture/operating-system combinations:
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Linux/IA-64: Fully tested and supported.
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Linux/x86-64: Works well.
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Linux/x86: Works well, but C library is missing some unwind-info.
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Linux/PARISC: Works well, but C library missing unwind-info.
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HP-UX/IA-64: Mostly works but known to have some serious limitations.
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* General Build Instructions
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In general, this library can be built and installed with the following
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commands:
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$ ./configure
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$ make
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$ make install prefix=PREFIX
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where PREFIX is the installation prefix. By default, a prefix of
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/usr/local is used, such that libunwind.a is installed in
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/usr/local/lib and unwind.h is installed in /usr/local/include. For
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testing, you may want to use a prefix of /usr/local instead.
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* Building with Intel compiler
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** Version 8 and later
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Starting with version 8, the preferred name for the IA-64 Intel
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compiler is "icc" (same name as on x86). Thus, the configure-line
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should look like this:
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$ ./configure CC=icc CFLAGS="-g -O3 -ip" CXX=icc CCAS=gcc CCASFLAGS=-g \
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LDFLAGS="-L$PWD/src/.libs"
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** Version 7
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To build libunwind with the Intel Electron compiler (ECC), it is
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recommended to run configure like this:
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$ ./configure CC=ecc CXX=ecc CCAS=gcc CCASFLAGS=-g \
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LDFLAGS="-L$PWD/src/.libs"
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The reason for this is that ECC uses the Intel assembler, which
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doesn't grok some of the IA-64 assembly code in the "tests" directory.
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For an ECC-built version of libunwind to work properly, you also need
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to ensure that /usr/include/asm/fpu.h contains a "long double" member
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called "__dummy" in the declaration of "struct ia64_fpreg". Without
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that member, variables of type unw_context_t won't be aligned
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properly.
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* Building on HP-UX
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For the time being, libunwind must be built with GCC on HP-UX.
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libunwind should be configured and installed on HP-UX like this:
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$ ./configure CFLAGS="-g -O2 -mlp64" CXXFLAGS="-g -O2 -mlp64"
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Caveat: Unwinding of 32-bit (ILP32) binaries is not supported
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at the moment.
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** Workaround for older versions of GCC
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GCC v3.0 and GCC v3.2 ship with a bad version of sys/types.h. The
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workaround is to issue the following commands before running
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"configure":
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$ mkdir $top_dir/include/sys
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$ cp /usr/include/sys/types.h $top_dir/include/sys
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GCC v3.3.2 or later have been fixed and do not require this
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workaround.
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* Regression Testing
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After building the library, you can run a set of regression tests with:
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$ make check
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** Expected results on IA-64 Linux
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Unless you have a very recent C library and compiler installed, it is
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currently expected to have the following tests fail on IA-64 Linux:
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Gtest-init (should pass starting with glibc-2.3.x/gcc-3.4)
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Ltest-init (should pass starting with glibc-2.3.x/gcc-3.4)
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test-ptrace (should pass starting with glibc-2.3.x/gcc-3.4)
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run-ia64-test-dyn1 (should pass starting with glibc-2.3.x)
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This does not mean that libunwind cannot be used with older compilers
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or C libraries, it just means that for certain corner cases, unwinding
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will fail. Since they're corner cases, it is not likely for
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applications to trigger them.
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Note: If you get lots of errors in Gia64-test-nat and Lia64-test-nat, it's
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almost certainly a sign of an old assembler. The GNU assembler used
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to encode previous-stack-pointer-relative offsets incorrectly.
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This bug was fixed on 21-Sep-2004 so any later assembler will be
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fine.
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** Expected results on x86 Linux
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The following tests are expected to fail on x86 Linux:
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Gtest-bt (see http://sources.redhat.com/bugzilla/show_bug.cgi?id=595)
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Ltest-bt (likewise)
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Gtest-resume-sig (likewise)
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Ltest-resume-sig (likewise)
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Gtest-dyn1 (no dynamic unwind info support yet)
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Ltest-dyn1 (no dynamic unwind info support yet)
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test-setjmp (longjmp() not implemented yet)
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run-check-namespace (no _Ux86_getcontext yet)
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In addition, the following are failing on Debian (Sarge):
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Gtest-init (lack of unwind info for __libc_start_main,
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libc ought to be compiled without
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-fno-frame-pointer or with -fexceptions)
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Ltest-init (likewise)
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test-ptrace (likewise?)
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** Expected results on x86-64 Linux
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The following tests are expected to fail on x86-64 Linux:
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Gtest-dyn1 (no dynamic unwind info support yet)
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Ltest-dyn1 (no dynamic unwind info support yet)
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Gtest-init (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18743)
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Ltest-init (likewise)
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test-async-sig (crashes due to bad unwind-info?)
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test-setjmp (longjmp() not implemented yet)
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run-check-namespace (no _Ux86_64_getcontext yet)
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run-ptrace-mapper (??? investigate)
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run-ptrace-misc (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18748
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and http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18749)
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** Expected results on PARISC Linux
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Caveat: GCC v3.4 or newer is needed on PA-RISC Linux. Earlier
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versions of the compiler failed to generate the exception-handling
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program header (GNU_EH_FRAME) needed for unwinding.
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The following tests are expected to fail on x86-64 Linux:
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Gtest-bt (backtrace truncated at kill() due to lack of unwind-info)
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Ltest-bt (likewise)
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Gtest-resume-sig (Gresume.c:my_rt_sigreturn() is wrong somehow)
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Ltest-resume-sig (likewise)
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Gtest-init (likewise)
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Ltest-init (likewise)
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Gtest-dyn1 (no dynamic unwind info support yet)
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Ltest-dyn1 (no dynamic unwind info support yet)
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test-setjmp (longjmp() not implemented yet)
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run-check-namespace (toolchain doesn't support HIDDEN yet)
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** Expected results on HP-UX
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"make check" is currently unsupported for HP-UX. You can try to run
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it, but most tests will fail (and some may fail to terminate). The
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only test programs that are known to work at this time are:
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tests/bt
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tests/Gperf-simple
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tests/test-proc-info
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tests/test-static-link
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tests/Gtest-init
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tests/Ltest-init
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tests/Gtest-resume-sig
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tests/Ltest-resume-sig
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* Performance Testing
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This distribution includes a few simple performance tests which give
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some idea of the basic cost of various libunwind operations. After
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building the library, you can run these tests with the following
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commands:
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$ cd tests
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$ make perf
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* Contacting the Developers
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Please direct all questions regarding this library to:
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libunwind@linux.hpl.hp.com
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For spam protection, you'll have to subscribe to this list before
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posting a question. You can do this by sending a mail to
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libunwind-request@linux.hpl.hp.com with a body of:
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subscribe libunwind
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