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authorJim Blandy <jimb@red-bean.com>1996-12-19 07:55:42 +0000
committerJim Blandy <jimb@red-bean.com>1996-12-19 07:55:42 +0000
commitc0ab1b8d03f17d858321cc86899e5905760f40ac (patch)
tree37f440dd657c4016bae473e41f680e82e3166a07 /libguile/eval.c
parent96963166857cb2b78054c1fb982a6de599bbd74f (diff)
downloadguile-c0ab1b8d03f17d858321cc86899e5905760f40ac.tar.gz
Don't use GCC extensions to allocate space for debugging frames.
(Here he goes again! Why do we put up with this?!) * debug.h (scm_debug_frame): Make the 'vect' member a pointer to an scm_debug_info structure, not an in-line array of them. Add 'info' member, to say how many vect elements we've used, for eval frames. * eval.c (SCM_CEVAL): Use alloca to allocate space for vect. Use a new variable debug_info_end to mark the end of vect, instead of the address of the 'info' pointer itself. [DEVAL] (ENTER_APPLY, SCM_CEVAL, SCM_APPLY): Remove casts of &debug to scm_debug_frame *; debug is a real scm_debug_frame now. (SCM_APPLY): Explicitly allocate space for debug.vect. * debug.c (scm_m_start_stack): Same, for vframe.vect. * stacks.c: Adjusted for new debug frame structure. (RELOC_INFO, RELOC_FRAME): New macros. (stack_depth, read_frames): Use them, and new scm_debug_frame element 'info', instead of magically knowing that eval frames have an info pointer sitting after vect. (scm_make_stack, scm_stack_id, scm_last_stack_frame): Use RELOC_FRAME. (scm_init_stacks): Formatting tweaks.
Diffstat (limited to 'libguile/eval.c')
-rw-r--r--libguile/eval.c30
1 files changed, 15 insertions, 15 deletions
diff --git a/libguile/eval.c b/libguile/eval.c
index 6fee7e969..56a57e18b 100644
--- a/libguile/eval.c
+++ b/libguile/eval.c
@@ -1178,7 +1178,7 @@ scm_eval_args (l, env)
SCM_SET_TRACED_FRAME (debug);\
if (SCM_CHEAPTRAPS_P)\
{\
- tmp = scm_make_debugobj ((scm_debug_frame *) &debug);\
+ tmp = scm_make_debugobj (&debug);\
scm_ithrow (scm_i_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\
}\
else\
@@ -1314,17 +1314,15 @@ SCM_CEVAL (x, env)
} t;
SCM proc, arg2;
#ifdef DEVAL
- struct
- {
- scm_debug_frame *prev;
- long status;
- scm_debug_info vect[scm_debug_eframe_size];
- scm_debug_info *info;
- } debug;
+ scm_debug_frame debug;
+ scm_debug_info *debug_info_end;
debug.prev = scm_last_debug_frame;
debug.status = scm_debug_eframe_size;
- debug.info = &debug.vect[0];
- scm_last_debug_frame = (scm_debug_frame *) &debug;
+ debug.vect = (scm_debug_info *) alloca (scm_debug_eframe_size
+ * sizeof (debug.vect[0]));
+ debug.info = debug.vect;
+ debug_info_end = debug.vect + scm_debug_eframe_size;
+ scm_last_debug_frame = &debug;
#endif
#ifdef EVAL_STACK_CHECKING
if (SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc)
@@ -1362,7 +1360,7 @@ nextframe:
SCM_CLEAR_ARGSREADY (debug);
if (SCM_OVERFLOWP (debug))
--debug.info;
- else if (++debug.info == (scm_debug_info *) &debug.info)
+ else if (++debug.info >= debug_info_end)
{
SCM_SET_OVERFLOW (debug);
debug.info -= 2;
@@ -1378,7 +1376,7 @@ start:
SCM_ENTER_FRAME_P = 0;
SCM_RESET_DEBUG_MODE;
if (SCM_CHEAPTRAPS_P)
- t.arg1 = scm_make_debugobj ((scm_debug_frame *) &debug);
+ t.arg1 = scm_make_debugobj (&debug);
else
{
scm_make_cont (&t.arg1);
@@ -2163,7 +2161,7 @@ exit:
SCM_RESET_DEBUG_MODE;
SCM_CLEAR_TRACED_FRAME (debug);
if (SCM_CHEAPTRAPS_P)
- t.arg1 = scm_make_debugobj ((scm_debug_frame *) &debug);
+ t.arg1 = scm_make_debugobj (&debug);
else
{
scm_make_cont (&t.arg1);
@@ -2286,8 +2284,10 @@ SCM_APPLY (proc, arg1, args)
#ifdef DEBUG_EXTENSIONS
#ifdef DEVAL
scm_debug_frame debug;
+ scm_debug_info debug_vect_body;
debug.prev = scm_last_debug_frame;
debug.status = SCM_APPLYFRAME;
+ debug.vect = &debug_vect_body;
debug.vect[0].a.proc = proc;
debug.vect[0].a.args = SCM_EOL;
scm_last_debug_frame = &debug;
@@ -2321,7 +2321,7 @@ SCM_APPLY (proc, arg1, args)
SCM_ENTER_FRAME_P = 0;
SCM_RESET_DEBUG_MODE;
if (SCM_CHEAPTRAPS_P)
- tmp = scm_make_debugobj ((scm_debug_frame *) &debug);
+ tmp = scm_make_debugobj (&debug);
else
{
scm_make_cont (&tmp);
@@ -2468,7 +2468,7 @@ exit:
SCM_RESET_DEBUG_MODE;
SCM_CLEAR_TRACED_FRAME (debug);
if (SCM_CHEAPTRAPS_P)
- arg1 = scm_make_debugobj ((scm_debug_frame *) &debug);
+ arg1 = scm_make_debugobj (&debug);
else
{
scm_make_cont (&arg1);