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Function argument fixes #198
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This is a bit of a concern since
nval
is printed by the debug and warning code. On Linux and BSD this is safe, since printf(3) will print "(null)" but on other systems it will cause a NULL dereference. So either we need to wrapnval
with the NN macro everywhere it is printed or set it to some non-NULL value. Setting tox->nval
(or a copy of it) is not really correct but perhaps is better than NULL.There was a problem hiding this comment.
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The debugging statements need to be able to cope with anonymous cells. The temp cells used for expressions (including function return values) are anonymous. The jump cells are as well.
A quick grep found 13 instances of nval in DPRINTF statements, 10 wrapped, 3 unwrapped. I will wrap them all.
Also, parsing a function leaks the previous function definition's arglist. Compare
'function f(a) {}'
with'function f(a) {} function g() {}'
. I will see about preserving the argument names while also eliminating the leak.There was a problem hiding this comment.
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It is not just DPRINTF calls, also SYNTAX, WARNING and FATAL. Some of those may not be reachable but the ones in funnyvar() are.
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there is a lot to digest and review here. miguel, please keep nval NN wrapping as a separate PR. thanks
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@plan9, I will keep the NN wrapping separate. I hope to add a commit to this branch later today (perhaps tomorrow) to provide meaningful names for the args.