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Free bitmap buffer if it's not used

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If the iseqs don't have any objects in them that need marking, then
immediately free the bitmap buffer
This commit is contained in:
Aaron Patterson 2022-06-23 16:02:42 -07:00 committed by Aaron Patterson
parent 8d63a04703
commit 0b58059f15
Notes: git 2022-06-24 08:52:21 +09:00 
Merged: https://github.com/ruby/ruby/pull/6058
2 changed files with 27 additions and 6 deletions
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23
compile.c
View File

@ -2340,6 +2340,7 @@ iseq_set_sequence(rb_iseq_t *iseq, LINK_ANCHOR *const anchor)
int code_size = code_index;
iseq_bits_t tmp[1] = {0};
bool needs_bitmap = false;
if (ISEQ_MBITS_BUFLEN(code_index) == 1) {
mark_offset_bits = tmp;
@ -2397,6 +2398,7 @@ iseq_set_sequence(rb_iseq_t *iseq, LINK_ANCHOR *const anchor)
ISEQ_MBITS_SET(mark_offset_bits, code_index + 1 + j);
RB_OBJ_WRITTEN(iseq, Qundef, map);
FL_SET(iseqv, ISEQ_MARKABLE_ISEQ);
needs_bitmap = true;
break;
}
case TS_LINDEX:
@ -2413,6 +2415,7 @@ iseq_set_sequence(rb_iseq_t *iseq, LINK_ANCHOR *const anchor)
RB_OBJ_WRITTEN(iseq, Qundef, v);
ISEQ_MBITS_SET(mark_offset_bits, code_index + 1 + j);
FL_SET(iseqv, ISEQ_MARKABLE_ISEQ);
needs_bitmap = true;
}
break;
}
@ -2542,7 +2545,13 @@ iseq_set_sequence(rb_iseq_t *iseq, LINK_ANCHOR *const anchor)
body->mark_bits.single = mark_offset_bits[0];
}
else {
body->mark_bits.list = mark_offset_bits;
if (needs_bitmap) {
body->mark_bits.list = mark_offset_bits;
}
else {
body->mark_bits.list = 0;
ruby_xfree(mark_offset_bits);
}
}
/* get rid of memory leak when REALLOC failed */
@ -11217,6 +11226,7 @@ ibf_load_code(const struct ibf_load *load, rb_iseq_t *iseq, ibf_offset_t bytecod
else {
mark_offset_bits = ZALLOC_N(iseq_bits_t, ISEQ_MBITS_BUFLEN(iseq_size));
}
bool needs_bitmap = false;
unsigned int min_ic_index, min_ise_index, min_ivc_index;
min_ic_index = min_ise_index = min_ivc_index = UINT_MAX;
@ -11243,6 +11253,7 @@ ibf_load_code(const struct ibf_load *load, rb_iseq_t *iseq, ibf_offset_t bytecod
RB_OBJ_WRITTEN(iseqv, Qundef, v);
ISEQ_MBITS_SET(mark_offset_bits, code_index);
FL_SET(iseqv, ISEQ_MARKABLE_ISEQ);
needs_bitmap = true;
}
break;
}
@ -11264,6 +11275,7 @@ ibf_load_code(const struct ibf_load *load, rb_iseq_t *iseq, ibf_offset_t bytecod
ISEQ_MBITS_SET(mark_offset_bits, code_index);
RB_OBJ_WRITTEN(iseqv, Qundef, v);
FL_SET(iseqv, ISEQ_MARKABLE_ISEQ);
needs_bitmap = true;
break;
}
case TS_ISEQ:
@ -11275,6 +11287,7 @@ ibf_load_code(const struct ibf_load *load, rb_iseq_t *iseq, ibf_offset_t bytecod
RB_OBJ_WRITTEN(iseqv, Qundef, v);
ISEQ_MBITS_SET(mark_offset_bits, code_index);
FL_SET(iseqv, ISEQ_MARKABLE_ISEQ);
needs_bitmap = true;
}
break;
}
@ -11359,7 +11372,13 @@ ibf_load_code(const struct ibf_load *load, rb_iseq_t *iseq, ibf_offset_t bytecod
load_body->mark_bits.single = mark_offset_bits[0];
}
else {
load_body->mark_bits.list = mark_offset_bits;
if (needs_bitmap) {
load_body->mark_bits.list = mark_offset_bits;
}
else {
load_body->mark_bits.list = 0;
ruby_xfree(mark_offset_bits);
}
}
assert(code_index == iseq_size);

10
iseq.c
View File

@ -193,7 +193,7 @@ rb_iseq_free(const rb_iseq_t *iseq)
}
ruby_xfree((void *)body->catch_table);
ruby_xfree((void *)body->param.opt_table);
if (ISEQ_MBITS_BUFLEN(body->iseq_size) > 1) {
if (ISEQ_MBITS_BUFLEN(body->iseq_size) > 1 && body->mark_bits.list) {
ruby_xfree((void *)body->mark_bits.list);
}
@ -388,9 +388,11 @@ rb_iseq_each_value(const rb_iseq_t *iseq, iseq_value_itr_t * func, void *data)
iseq_scan_bits(0, body->mark_bits.single, code, func, data);
}
else {
for (unsigned int i = 0; i < ISEQ_MBITS_BUFLEN(size); i++) {
iseq_bits_t bits = body->mark_bits.list[i];
iseq_scan_bits(i, bits, code, func, data);
if (body->mark_bits.list) {
for (unsigned int i = 0; i < ISEQ_MBITS_BUFLEN(size); i++) {
iseq_bits_t bits = body->mark_bits.list[i];
iseq_scan_bits(i, bits, code, func, data);
}
}
}
}