AW: [PATCH] eh_personality.cc: unwinding on ARM

[EXTERNAL Waechtler Peter (Fa. TCP, CM-AI/PJ-CF31)]

> -----Ursprüngliche Nachricht-----
> Von: Andrew Stubbs [mailto:a...@codesourcery.com]
> Gesendet: Montag, 19. März 2012 17:12
> An: EXTERNAL Waechtler Peter (Fa. TCP, CM-AI/PJ-CF31)
> Cc: gcc-patches@gcc.gnu.org; libstd...@gcc.gnu.org;
> p...@codesourcery.com; pwaecht...@mac.com; d...@false.org
> Betreff: Re: [PATCH] eh_personality.cc: unwinding on ARM
>
> On 16/03/12 13:29, EXTERNAL Waechtler Peter (Fa. TCP,
> CM-AI/PJ-CF31) wrote:
> > The CodeSourcery toolchain contains a "fix" like the following,
> > please consider for adding it.
>
> Here's the full original patch with ChangeLog.
>
> I don't know why Dan never submitted this one. Perhaps it's
> not suitable
> for upstream or not considered the correct fix?
>
> Anyway, as far as copyright goes, I don't believe
> CodeSourcery has any
> problem with this being committed.
>


And here is a stub for a test case.
I don't know how to run the testsuite, just put in include and VERIFY-thingie



#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <execinfo.h>

#include <iostream>
#include <vector>
using namespace std;


static void abort_handler(int n_signal, siginfo_t *siginfo, void *ptr);


static void abort_handler(int n_signal, siginfo_t *siginfo, void *ptr)
{
        void *address[20];
        int depth;

        depth = backtrace(address, sizeof(address)/sizeof(void*));

        backtrace_symbols_fd(address, depth, 0);
        /* this is a dumb check, better look for main */
        if (depth == sizeof(address)/sizeof(void*))
                cerr << "failed" << endl;
        else
                cerr << "passed" << endl;
}

int tst_eh01(void)
{
        int rc = 0;

        std::vector<int>  v(10);
        rc = v.at(42);

        return rc;
}

int main(int argc, char *argv[])
{
    int c;
    struct sigaction sa;

    memset(&sa, 0 , sizeof(sa));
    sa.sa_sigaction = abort_handler;
    sa.sa_flags = SA_SIGINFO;

    sigaction(SIGABRT, &sa, NULL);

    c = tst_eh01();
    return c;
}


With a fixed CodeSourcery version:

cs-minimal-sysroot/usr/lib/bin/sysroot-qemu src/bt/tst-eh01
terminate called after throwing an instance of 'std::out_of_range'
  what():  vector::_M_range_check
src/bt/tst-eh01[0x9654]
cs-minimal-sysroot/usr/lib/bin/../../../lib/libc.so.6(__default_rt_sa_restorer_v1+0x0)[0x40a06ce0]
cs-minimal-sysroot/usr/lib/bin/../../../lib/libc.so.6(gsignal+0x40)[0x40a059bc]
cs-minimal-sysroot/usr/lib/bin/../../../lib/libc.so.6(abort+0x1d4)[0x40a0acec]
cs-minimal-sysroot/usr/lib/bin/../../../usr/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x110)[0x408e5f4c]
cs-minimal-sysroot/usr/lib/bin/../../../usr/lib/libstdc++.so.6(+0xa707c)[0x408e407c]
cs-minimal-sysroot/usr/lib/bin/../../../usr/lib/libstdc++.so.6(_ZSt9terminatev+0x1c)[0x408e40a4]
cs-minimal-sysroot/usr/lib/bin/../../../usr/lib/libstdc++.so.6(__cxa_throw+0x9c)[0x408e4220]
cs-minimal-sysroot/usr/lib/bin/../../../usr/lib/libstdc++.so.6(_ZSt20__throw_out_of_rangePKc+0x64)[0x4088dc04]
src/bt/tst-eh01(_ZNKSt6vectorIiSaIiEE14_M_range_checkEj+0x44)[0x9c24]
src/bt/tst-eh01(_ZNSt6vectorIiSaIiEE2atEj+0x20)[0x99a8]
src/bt/tst-eh01(_Z8tst_eh01v+0x5c)[0x972c]
src/bt/tst-eh01(main+0x50)[0x97c8]
cs-minimal-sysroot/usr/lib/bin/../../../lib/libc.so.6(__libc_start_main+0x114)[0x409ee754]
passed
qemu: uncaught target signal 6 (Aborted) - core dumped
Aborted



with an unfixed version:

$ ./tst-eh01
terminate called after throwing an instance of 'std::out_of_range'
  what():  vector::_M_range_check
./tst-eh01[0x9580]
/lib/libc.so.6(__default_rt_sa_restorer_v2+0x0)[0x4c883770]
/lib/libc.so.6(gsignal+0x40)[0x4c88241c]
/lib/libc.so.6(abort+0x1c0)[0x4c88680c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
/lib/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x134)[0x4cb2ca0c]
failed
Aborted