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45083: Add signal protection to execarith().

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Otherwise we could get re-entrancy in memory functions when
setting variables.
This commit is contained in:
Peter Stephenson 2019-12-18 10:51:59 +00:00
parent a90e93f454
commit fd068221b7
2 changed files with 8 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2019-12-18 Peter Stephenson <p.stephenson@samsung.com>
* 45083: Src/exec.c: execarith() needs signal protection as
it sets variables.
2019-12-18 Daniel Shahaf <danielsh@apache.org>
* 45076: Src/loop.c: internal: Simplify handling of

3
Src/exec.c
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@ -5101,6 +5101,7 @@ execarith(Estate state, UNUSED(int do_exec))
mnumber val = zero_mnumber;
int htok = 0;
queue_signals();
if (isset(XTRACE)) {
printprompt4();
fprintf(xtrerr, "((");
@ -5120,6 +5121,8 @@ execarith(Estate state, UNUSED(int do_exec))
fprintf(xtrerr, " ))\n");
fflush(xtrerr);
}
unqueue_signals();
if (errflag) {
errflag &= ~ERRFLAG_ERROR;
return 2;