#1273: Provide a parrot 'backtrace' with assertion failures.
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Reporter: Austin_Hastings | Type: todo
Status: new | Priority: normal
Milestone: | Component: none
Version: 1.7.0 | Severity: medium
Keywords: | Lang:
Patch: | Platform:
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When an assertion fails, a C stack trace is provided which is not
particularly valuable for determining how to reproduce the problem (short
of re-running whatever enormous codeset produces the first failure). For
example:
{{{
src/string/api.c:549: failed assertion '(b)->charset'
Backtrace - Obtained 16 stack frames (max trace depth is 32).
/usr/local/lib/libparrot.so.1.7.0 [0x400d3d62]
/usr/local/lib/libparrot.so.1.7.0(Parrot_confess+0x9a) [0x400d3eca]
/usr/local/lib/libparrot.so.1.7.0(Parrot_str_append+0x17c) [0x4005477c]
/usr/local/lib/libparrot.so.1.7.0(Parrot_str_join+0x160) [0x40054cf0]
/usr/local/lib/libparrot.so.1.7.0 [0x4007985f]
/usr/local/lib/libparrot.so.1.7.0 [0x4011f34e]
/usr/local/lib/libparrot.so.1.7.0 [0x4011d8af]
/usr/local/lib/libparrot.so.1.7.0 [0x400f589f]
/usr/local/lib/libparrot.so.1.7.0 [0x400f5cb0]
/usr/local/lib/libparrot.so.1.7.0(Parrot_runops_fromc_args+0xc6)
[0x400f6a56]
/usr/local/lib/libparrot.so.1.7.0(Parrot_runcode+0x15e) [0x400d09ce]
/usr/local/lib/libparrot.so.1.7.0 [0x402bf313]
/usr/local/lib/libparrot.so.1.7.0(imcc_run+0x39c) [0x402bff0c]
/usr/local/bin/parrot [0x8048938]
/lib/libc.so.6(__libc_start_main+0xe5) [0x403c6775]
/usr/local/bin/parrot [0x80487d1]
make: *** [test-attributes] Aborted (core dumped)
}}}
I propose that the assertion-failure code should be extended to also
provide a "backtrace" (a la the `backtrace` opcode) of the Parrot stack,
so that developers can find the particular areas of their code that are
experiencing the failure.
Cotto suggested in IRC that the Parrot_confess routine would be the place
to make this change.
--
Ticket URL: <https://trac.parrot.org/parrot/ticket/1273>
Parrot <https://trac.parrot.org/parrot/>
Parrot Development
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