[Python-checkins] cpython (3.6): properly free memory in pgen
benjamin.peterson
python-checkins at python.org
Sun Sep 18 21:00:41 EDT 2016
https://hg.python.org/cpython/rev/bdbe09afcd20
changeset: 103932:bdbe09afcd20
branch: 3.6
parent: 103930:91285b24f1c2
user: Benjamin Peterson <benjamin at python.org>
date: Sun Sep 18 18:00:25 2016 -0700
summary:
properly free memory in pgen
files:
Include/grammar.h | 1 +
Parser/grammar.c | 17 +++++++++++++++++
Parser/pgen.c | 18 ++++++++++++++++--
Parser/pgenmain.c | 1 +
4 files changed, 35 insertions(+), 2 deletions(-)
diff --git a/Include/grammar.h b/Include/grammar.h
--- a/Include/grammar.h
+++ b/Include/grammar.h
@@ -69,6 +69,7 @@
/* FUNCTIONS */
grammar *newgrammar(int start);
+void freegrammar(grammar *g);
dfa *adddfa(grammar *g, int type, const 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
--- a/Parser/grammar.c
+++ b/Parser/grammar.c
@@ -28,6 +28,23 @@
return g;
}
+void
+freegrammar(grammar *g)
+{
+ int i;
+ for (i = 0; i < g->g_ndfas; i++) {
+ free(g->g_dfa[i].d_name);
+ for (int 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, const char *name)
{
diff --git a/Parser/pgen.c b/Parser/pgen.c
--- a/Parser/pgen.c
+++ b/Parser/pgen.c
@@ -117,6 +117,16 @@
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 @@
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 @@
g = maketables(gr);
translatelabels(g);
addfirstsets(g);
- PyObject_FREE(gr);
+ freenfagrammar(gr);
return g;
}
diff --git a/Parser/pgenmain.c b/Parser/pgenmain.c
--- a/Parser/pgenmain.c
+++ b/Parser/pgenmain.c
@@ -80,6 +80,7 @@
printf("Writing %s ...\n", graminit_h);
printnonterminals(g, fp);
fclose(fp);
+ freegrammar(g);
Py_Exit(0);
return 0; /* Make gcc -Wall happy */
}
--
Repository URL: https://hg.python.org/cpython
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