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config/debug/strace.in
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Tue Dec 13 23:32:39 2011 +0100 (2011-12-13)
branch1.13
changeset 2847 c0bf2319af08
parent 2006 f15068f8ae3b
child 2733 3362c64f4b6c
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>
(transplanted from 4193d6e6a17430a177fa88c287879c2c35e319f3) 
     1 # strace

     2 

     3 ## depends on ! BACKEND

     4 

     5 choice

     6     bool

     7     prompt "strace version"

     8 # Don't remove next line

     9 # CT_INSERT_VERSION_BELOW

    10 

    11 config STRACE_V_4_5_20

    12     bool

    13     prompt "4.5.20 (EXPERIMENTAL)"

    14     depends on EXPERIMENTAL

    15 

    16 config STRACE_V_4_5_19

    17     bool

    18     prompt "4.5.19"

    19 

    20 config STRACE_V_4_5_18

    21     bool

    22     prompt "4.5.18"

    23 

    24 config STRACE_V_4_5_17

    25     bool

    26     prompt "4.5.17 (OBSOLETE)"

    27     depends on OBSOLETE

    28 

    29 config STRACE_V_4_5_16

    30     bool

    31     prompt "4.5.16 (OBSOLETE)"

    32     depends on OBSOLETE

    33 

    34 config STRACE_V_4_5_15

    35     bool

    36     prompt "4.5.15 (OBSOLETE)"

    37     depends on OBSOLETE

    38 

    39 endchoice

    40 

    41 config STRACE_VERSION

    42     string

    43 # Don't remove next line

    44 # CT_INSERT_VERSION_STRING_BELOW

    45     default "4.5.20" if STRACE_V_4_5_20

    46     default "4.5.19" if STRACE_V_4_5_19

    47     default "4.5.18" if STRACE_V_4_5_18

    48     default "4.5.17" if STRACE_V_4_5_17

    49     default "4.5.16" if STRACE_V_4_5_16

    50     default "4.5.15" if STRACE_V_4_5_15
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