[Python-checkins] [2.7] properly free memory in pgen. (GH-7869) (closes bpo-27780
Benjamin Peterson
webhook-mailer at python.org
Sat Jun 23 00:04:24 EDT 2018
https://github.com/python/cpython/commit/482fac74999028af4764645a1f28dd4289b2f255
commit: 482fac74999028af4764645a1f28dd4289b2f255
branch: 2.7
author: Benjamin Peterson <benjamin at python.org>
committer: GitHub <noreply at github.com>
date: 2018-06-22T21:04:21-07:00
summary:
[2.7] properly free memory in pgen. (GH-7869) (closes bpo-27780
(cherry picked from commit 9ac11a752a19c3b8607582a3d5ccb615c467124b)
Co-authored-by: Benjamin Peterson <benjamin at python.org>
files:
M Include/grammar.h
M Parser/grammar.c
M Parser/pgen.c
M Parser/pgenmain.c
diff --git a/Include/grammar.h b/Include/grammar.h
index 8426da30d9c6..decf2e6126bc 100644
--- a/Include/grammar.h
+++ b/Include/grammar.h
@@ -69,6 +69,7 @@ typedef struct {
/* FUNCTIONS */
grammar *newgrammar(int start);
+void freegrammar(grammar *g);
dfa *adddfa(grammar *g, int type, char *name);
int addstate(dfa *d);
void addarc(dfa *d, int from, int to, int lbl);
diff --git a/Parser/grammar.c b/Parser/grammar.c
index fa1dd7cdf87a..fcd22191103a 100644
--- a/Parser/grammar.c
+++ b/Parser/grammar.c
@@ -32,6 +32,24 @@ newgrammar(int start)
return g;
}
+void
+freegrammar(grammar *g)
+{
+ int i;
+ for (i = 0; i < g->g_ndfas; i++) {
+ int j;
+ free(g->g_dfa[i].d_name);
+ for (j = 0; j < g->g_dfa[i].d_nstates; j++)
+ PyObject_FREE(g->g_dfa[i].d_state[j].s_arc);
+ PyObject_FREE(g->g_dfa[i].d_state);
+ }
+ PyObject_FREE(g->g_dfa);
+ for (i = 0; i < g->g_ll.ll_nlabels; i++)
+ free(g->g_ll.ll_label[i].lb_str);
+ PyObject_FREE(g->g_ll.ll_label);
+ PyObject_FREE(g);
+}
+
dfa *
adddfa(grammar *g, int type, char *name)
{
diff --git a/Parser/pgen.c b/Parser/pgen.c
index f3031aea0b6d..5968a498a7b8 100644
--- a/Parser/pgen.c
+++ b/Parser/pgen.c
@@ -117,6 +117,16 @@ newnfagrammar(void)
return gr;
}
+static void
+freenfagrammar(nfagrammar *gr)
+{
+ for (int i = 0; i < gr->gr_nnfas; i++) {
+ PyObject_FREE(gr->gr_nfa[i]->nf_state);
+ }
+ PyObject_FREE(gr->gr_nfa);
+ PyObject_FREE(gr);
+}
+
static nfa *
addnfa(nfagrammar *gr, char *name)
{
@@ -488,7 +498,11 @@ makedfa(nfagrammar *gr, nfa *nf, dfa *d)
convert(d, xx_nstates, xx_state);
- /* XXX cleanup */
+ for (int i = 0; i < xx_nstates; i++) {
+ for (int j = 0; j < xx_state[i].ss_narcs; j++)
+ delbitset(xx_state[i].ss_arc[j].sa_bitset);
+ PyObject_FREE(xx_state[i].ss_arc);
+ }
PyObject_FREE(xx_state);
}
@@ -669,7 +683,7 @@ pgen(node *n)
g = maketables(gr);
translatelabels(g);
addfirstsets(g);
- PyObject_FREE(gr);
+ freenfagrammar(gr);
return g;
}
diff --git a/Parser/pgenmain.c b/Parser/pgenmain.c
index 88fa7f19b84a..0b47295c1b47 100644
--- a/Parser/pgenmain.c
+++ b/Parser/pgenmain.c
@@ -67,6 +67,7 @@ main(int argc, char **argv)
printf("Writing %s ...\n", graminit_h);
printnonterminals(g, fp);
fclose(fp);
+ freegrammar(g);
Py_Exit(0);
return 0; /* Make gcc -Wall happy */
}
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