patches/glibc/2.5.1/190-alpha-sigsuspend.patch
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"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> |
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Tue Dec 13 23:32:39 2011 +0100 (2011-12-13) |
changeset 2807 |
4193d6e6a174 |
parent 744 |
4bf8448536d5
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permissions |
-rw-r--r-- |
scripts: fix dumping execution backtrace
Dumping the backtrace has been broken since changeset #652e56d6d35a:
scripts: execute each steps in a subshell
We can spawn sub-sub-shells in some cases.
The way the fault handler works is to dump the backtrace, but to avoid
printing it once for every sub-shell (which could get quite confusing),
it simply exits when it detects that it is being run in a sub-shell,
leaving to the top-level shell the work to dump the backtrace.
Because each step is executed in its own sub-shell, the variable arrays
that contain the step name, the source file and line number, are lost
when exiting the per-step sub-shell.
Hence, the backtrace is currently limited to printing only the top-level
main procedure of the shell.
Fix this thus:
- when dumping the bckatraces for the steps & the functions, remember
it was dumped, and only dump it if it was not already dumped
- at the top-level shell, print the hints
Also, rename the top-level step label.
Reported-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
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--- glibc-2.5/sysdeps/unix/sysv/linux/alpha/sigsuspend.S.orig 2006-10-22 22:17:01.000000000 +0200
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+++ glibc-2.5/sysdeps/unix/sysv/linux/alpha/sigsuspend.S 2006-10-22 22:18:05.000000000 +0200
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@@ -31,3 +31,21 @@
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libc_hidden_def (__sigsuspend)
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weak_alias (__sigsuspend, sigsuspend)
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strong_alias (__sigsuspend, __libc_sigsuspend)
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+
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+#ifndef NO_CANCELLATION
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+ .globl __sigsuspend_nocancel;
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+ .align 4;
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+ .type __sigsuspend_nocancel, @function;
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+ .usepv __sigsuspend_nocancel, std;
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+ cfi_startproc;
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+__LABEL(__sigsuspend_nocancel)
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+ ldgp gp, 0(pv);
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+ PSEUDO_PROF;
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+ PSEUDO_PREPARE_ARGS
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+ lda v0, SYS_ify(sigsuspend);
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+ call_pal PAL_callsys;
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+ bne a3, SYSCALL_ERROR_LABEL;
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+ ret;
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+ cfi_endproc;
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+ .size __sigsuspend_nocancel, .-__sigsuspend_nocancel
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+#endif
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