diff options
Diffstat (limited to 'Src/signals.c')
| -rw-r--r-- | Src/signals.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/Src/signals.c b/Src/signals.c index 7ec517b7f..a45dac5e6 100644 --- a/Src/signals.c +++ b/Src/signals.c @@ -642,6 +642,7 @@ struct savetrap { }; static LinkList savetraps; +static int dontsavetrap; /* * Save the current trap by copying it. This does nothing to @@ -670,6 +671,10 @@ dosavetrap(int sig, int level) newshf->flags = shf->flags; newshf->funcdef = dupeprog(shf->funcdef, 0); } +#ifdef DEBUG + else dputs("BUG: no function present with function trap flag set."); +#endif + st->list = newshf; } else if (sigtrapped[sig]) { st->list = sigfuncs[sig] ? dupeprog(sigfuncs[sig], 0) : NULL; @@ -754,7 +759,8 @@ removetrap(int sig) * one, to aid in removing this one. However, if there's * already one at the current locallevel we just overwrite it. */ - if ((isset(LOCALTRAPS) || sig == SIGEXIT) && locallevel && + if (!dontsavetrap && (isset(LOCALTRAPS) || sig == SIGEXIT) && + locallevel && (!trapped || locallevel > (sigtrapped[sig] >> ZSIG_SHIFT))) dosavetrap(sig, locallevel); @@ -854,21 +860,19 @@ endtrapscope(void) remnode(savetraps, ln); - if (sigtrapped[sig]) - unsettrap(sig); - sigtrapped[sig] = st->flags; if (st->flags && (st->list != NULL)) { Eprog prog = (st->flags & ZSIG_FUNC) ? ((Shfunc) st->list)->funcdef : (Eprog) st->list; /* prevent settrap from saving this */ - int oldlt = opts[LOCALTRAPS]; - opts[LOCALTRAPS] = 0; + dontsavetrap++; settrap(sig, prog); - opts[LOCALTRAPS] = oldlt; + dontsavetrap--; if ((sigtrapped[sig] = st->flags) & ZSIG_FUNC) shfunctab->addnode(shfunctab, ((Shfunc)st->list)->nam, (Shfunc) st->list); - } + } else if (sigtrapped[sig]) + unsettrap(sig); + zfree(st, sizeof(*st)); } } @@ -881,6 +885,8 @@ endtrapscope(void) else freeeprog(exitfn); } + DPUTS(!locallevel && savetraps && firstnode(savetraps), + "BUG: still saved traps outside all function scope"); } /* Execute a trap function for a given signal, possibly |