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GC guard catch_table_ary in iseq_set_exception_table

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The function iseq_set_exception_table allocates memory which can cause
a GC compaction to run. Since catch_table_ary is not on the stack, it
can be moved, which would make tptr incorrect.
This commit is contained in:
Peter Zhu 2023-11-29 10:05:19 -05:00
parent 14761edbf6
commit 6ebcf25de2
1 changed files with 7 additions and 3 deletions
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10
compile.c
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@ -2796,9 +2796,11 @@ iseq_set_exception_table(rb_iseq_t *iseq)
struct iseq_catch_table_entry *entry;
ISEQ_BODY(iseq)->catch_table = NULL;
if (NIL_P(ISEQ_COMPILE_DATA(iseq)->catch_table_ary)) return COMPILE_OK;
tlen = (int)RARRAY_LEN(ISEQ_COMPILE_DATA(iseq)->catch_table_ary);
tptr = RARRAY_CONST_PTR(ISEQ_COMPILE_DATA(iseq)->catch_table_ary);
VALUE catch_table_ary = ISEQ_COMPILE_DATA(iseq)->catch_table_ary;
if (NIL_P(catch_table_ary)) return COMPILE_OK;
tlen = (int)RARRAY_LEN(catch_table_ary);
tptr = RARRAY_CONST_PTR(catch_table_ary);
if (tlen > 0) {
struct iseq_catch_table *table = xmalloc(iseq_catch_table_bytes(tlen));
@ -2834,6 +2836,8 @@ iseq_set_exception_table(rb_iseq_t *iseq)
RB_OBJ_WRITE(iseq, &ISEQ_COMPILE_DATA(iseq)->catch_table_ary, 0); /* free */
}
RB_GC_GUARD(catch_table_ary);
return COMPILE_OK;
}