diff options
Diffstat (limited to 'src/bytecode.c')
| -rw-r--r-- | src/bytecode.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/bytecode.c b/src/bytecode.c index 74cf401bf1..adc9352fb6 100644 --- a/src/bytecode.c +++ b/src/bytecode.c @@ -433,7 +433,7 @@ If the third argument is incorrect, Emacs may crash. */) Lisp_Object exec_byte_code (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth, - Lisp_Object args_template, int nargs, Lisp_Object *args) + Lisp_Object args_template, ptrdiff_t nargs, Lisp_Object *args) { int count = SPECPDL_INDEX (); #ifdef BYTE_CODE_METER @@ -464,7 +464,7 @@ exec_byte_code (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth, CHECK_STRING (bytestr); CHECK_VECTOR (vector); - CHECK_NUMBER (maxdepth); + CHECK_NATNUM (maxdepth); #ifdef BYTE_CODE_SAFE const_length = ASIZE (vector); @@ -486,6 +486,8 @@ exec_byte_code (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth, stack.byte_string = bytestr; stack.pc = stack.byte_string_start = SDATA (bytestr); stack.constants = vector; + if (min (PTRDIFF_MAX, SIZE_MAX) / sizeof (Lisp_Object) < XFASTINT (maxdepth)) + memory_full (SIZE_MAX); top = (Lisp_Object *) alloca (XFASTINT (maxdepth) * sizeof (Lisp_Object)); #if BYTE_MAINTAIN_TOP @@ -502,14 +504,14 @@ exec_byte_code (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth, if (INTEGERP (args_template)) { - int at = XINT (args_template); + ptrdiff_t at = XINT (args_template); int rest = at & 128; int mandatory = at & 127; - int nonrest = at >> 8; + ptrdiff_t nonrest = at >> 8; eassert (mandatory <= nonrest); if (nargs <= nonrest) { - int i; + ptrdiff_t i; for (i = 0 ; i < nargs; i++, args++) PUSH (*args); if (nargs < mandatory) @@ -528,7 +530,7 @@ exec_byte_code (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth, } else if (rest) { - int i; + ptrdiff_t i; for (i = 0 ; i < nonrest; i++, args++) PUSH (*args); PUSH (Flist (nargs - nonrest, args)); |