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bytecode compiler: add missing stack check in SFS pass

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C-implemented recursive pass needs stack-overflow
check and handling.

Closes #1607
This commit is contained in:
Matthew Flatt 2017-02-06 15:55:30 -07:00
parent 2333251a26
commit b3223ad8d2
1 changed files with 29 additions and 0 deletions
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29
racket/src/racket/src/sfs.c
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@ -29,6 +29,7 @@
#include "schpriv.h"
#include "schrunst.h"
#include "schmach.h"
#include "schexpobs.h"
struct SFS_Info {
@ -1360,12 +1361,40 @@ top_level_require_sfs(Scheme_Object *data, SFS_Info *rslv)
/* expressions */
/*========================================================================*/
static Scheme_Object *sfs_expr_k(void)
{
Scheme_Thread *p = scheme_current_thread;
Scheme_Object *e = (Scheme_Object *)p->ku.k.p1;
SFS_Info *info = (SFS_Info *)p->ku.k.p2;
p->ku.k.p1 = NULL;
p->ku.k.p2 = NULL;
return scheme_sfs_expr(e, info, p->ku.k.i1);
}
Scheme_Object *scheme_sfs_expr(Scheme_Object *expr, SFS_Info *info, int closure_self_pos)
/* closure_self_pos == -2 => immediately in sequence */
{
Scheme_Type type = SCHEME_TYPE(expr);
int seqn, stackpos, tp;
#ifdef DO_STACK_CHECK
{
# include "mzstkchk.h"
{
Scheme_Thread *p = scheme_current_thread;
p->ku.k.p1 = (void *)expr;
p->ku.k.p2 = (void *)info;
p->ku.k.i1 = closure_self_pos;
return scheme_handle_stack_overflow(sfs_expr_k);
}
}
#endif
seqn = info->seqn;
stackpos = info->stackpos;
tp = info->tail_pos;