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Add debug/arg-stack, and add slots debug/stack.

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These features should help implementing a debugger.
This commit is contained in:
Calvin Rose 2018-12-13 19:23:07 -05:00
parent e8c0dcd14e
commit 56e5c19aa9
1 changed files with 24 additions and 0 deletions
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24
src/core/debug.c
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@ -203,6 +203,8 @@ static Janet doframe(JanetStackFrame *frame) {
janet_table_put(t, janet_csymbolv(":tail"), janet_wrap_true());
}
if (frame->func && frame->pc) {
Janet *stack = (Janet *)frame + JANET_FRAME_SIZE;
JanetArray *slots;
off = (int32_t) (frame->pc - def->bytecode);
janet_table_put(t, janet_csymbolv(":pc"), janet_wrap_integer(off));
if (def->sourcemap) {
@ -213,6 +215,11 @@ static Janet doframe(JanetStackFrame *frame) {
if (def->source) {
janet_table_put(t, janet_csymbolv(":source"), janet_wrap_string(def->source));
}
/* Add stack arguments */
slots = janet_array(def->slotcount);
memcpy(slots->data, stack, sizeof(Janet) * def->slotcount);
slots->count = def->slotcount;
janet_table_put(t, janet_csymbolv(":slots"), janet_wrap_array(slots));
}
return janet_wrap_table(t);
}
@ -235,6 +242,17 @@ static int cfun_stack(JanetArgs args) {
JANET_RETURN_ARRAY(args, array);
}
static int cfun_argstack(JanetArgs args) {
JanetFiber *fiber;
JanetArray *array;
JANET_FIXARITY(args, 1);
JANET_ARG_FIBER(fiber, args, 0);
array = janet_array(fiber->stacktop - fiber->stackstart);
memcpy(array->data, fiber->data + fiber->stackstart, array->capacity * sizeof(Janet));
array->count = array->capacity;
JANET_RETURN_ARRAY(args, array);
}
static const JanetReg cfuns[] = {
{"debug/break", cfun_break,
"(debug/break source byte-offset)\n\n"
@ -256,6 +274,11 @@ static const JanetReg cfuns[] = {
{"debug/funbreak", cfun_unfbreak,
"(debug/fbreak fun [,pc=0])\n\n"
"Unset a breakpoint set with debug/fbreak."},
{"debug/arg-stack", cfun_argstack,
"(debug/arg-stack fiber)\n\n"
"Gets all values currently on the fiber's argument stack. Normally, "
"this should be empty unless the fiber signals while pushing arguments "
"to make a function call. Returns a new array."},
{"debug/stack", cfun_stack,
"(debug/stack fib)\n\n"
"Gets information about the stack as an array of tables. Each table "
@ -269,6 +292,7 @@ static const JanetReg cfuns[] = {
"\t:name - the human friendly name of the function\n"
"\t:pc - integer indicating the location of the program counter\n"
"\t:source - string with filename or other identifier for the source code\n"
"\t:slots - array of all values in each slot\n"
"\t:tail - boolean indicating a tail call"
},
{"debug/lineage", cfun_lineage,