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/* $Header$ */
/*
* Copyright © 1988-2004 Keith Packard and Bart Massey.
* All Rights Reserved. See the file COPYING in this directory
* for licensing information.
*/
#include "nickle.h"
static void
DebugAddVar (NamespacePtr namespace, char *string, Value v, Type *type)
{
ENTER ();
SymbolPtr symbol;
symbol = NamespaceAddName (namespace,
NewSymbolGlobal (AtomId (string), type),
publish_private);
BoxValueSet (symbol->global.value, 0, v);
EXIT ();
}
static void
DebugAddCommand (char *function, Bool names)
{
SymbolPtr symbol;
symbol = NamespaceFindName (CurrentNamespace, AtomId (function), True);
if (symbol && symbol->symbol.class == class_global)
{
CurrentCommands = NewCommand (CurrentCommands, symbol->symbol.name,
BoxValue (symbol->global.value, 0),
names);
}
}
static void
DebugDeleteCommand (char *function)
{
CurrentCommands = CommandRemove (CurrentCommands, AtomId (function));
}
static const struct {
char *function;
Bool names;
} debugCommands[] = {
{ "trace", False, },
{ "up", False, },
{ "down", False, },
{ "done", False, },
{ "help", False, },
};
#define NUM_DEBUG_COMMANDS (sizeof (debugCommands) / sizeof (debugCommands[0]))
static void
DebugAddCommands (void)
{
int i;
for (i = 0; i < NUM_DEBUG_COMMANDS; i++)
DebugAddCommand (debugCommands[i].function, debugCommands[i].names);
}
static void
DebugDeleteCommands (void)
{
int i;
for (i = 0; i < NUM_DEBUG_COMMANDS; i++)
DebugDeleteCommand (debugCommands[i].function);
}
Bool
DebugSetFrame (Value continuation, int offset)
{
ENTER ();
FramePtr frame = continuation->continuation.frame;
ObjPtr obj = continuation->continuation.obj;
InstPtr pc = continuation->continuation.pc;
ExprPtr stat = obj ? ObjStatement (obj, pc) : 0;
NamespacePtr namespace;
int n = offset;
Bool ret;
while (frame && frame->function->func.code->base.builtin)
{
stat = ObjStatement (frame->saveObj,
frame->savePc);
frame = frame->previous;
}
while (frame && n--)
{
stat = ObjStatement (frame->saveObj,
frame->savePc);
frame = frame->previous;
}
if (stat)
namespace = stat->base.namespace;
else
namespace = GlobalNamespace;
ret = False;
if (frame && namespace)
{
ret = True;
TopNamespace = CurrentNamespace = NewNamespace (namespace);
CurrentFrame = frame;
NamespaceImport (CurrentNamespace, DebugNamespace, publish_public);
DebugAddVar (CurrentNamespace, "cont", continuation, typePrim[rep_continuation]);
DebugAddVar (CurrentNamespace, "frame", NewInt (offset), typePrim[rep_integer]);
}
EXIT ();
return ret;
}
void
DebugStart (Value continuation)
{
if (LexResetInteractive ())
{
if (DebugSetFrame (continuation, 0))
DebugAddCommands ();
}
}
Value
do_Debug_done (void)
{
ENTER ();
TopNamespace = CurrentNamespace = GlobalNamespace;
CurrentFrame = 0;
DebugDeleteCommands ();
RETURN (Void);
}
Value
do_Debug_help (void)
{
ENTER ();
FilePrintf (FileStderr,
"debug commands: trace, up, down, done, help\n");
RETURN (Void);
}
Value
do_Debug_up (void)
{
ENTER ();
Value frame;
Value continuation;
continuation = lookupVar (0, "cont");
frame = lookupVar (0, "frame");
if (ValueIsContinuation(continuation) && ValueIsInt(frame))
{
if (DebugSetFrame (continuation, ValueInt(frame) + 1))
RETURN (TrueVal);
FilePrintf (FileStderr, "Already at top\n");
}
RETURN (FalseVal);
}
Value
do_Debug_down (void)
{
ENTER ();
Value frame;
Value continuation;
continuation = lookupVar (0, "cont");
frame = lookupVar (0, "frame");
if (ValueIsContinuation(continuation) && ValueIsInt(frame))
{
if (ValueInt(frame) <= 0)
FilePrintf (FileStderr, "Already at bottom\n");
else if (DebugSetFrame (continuation, ValueInt(frame) - 1))
RETURN (TrueVal);
}
RETURN (FalseVal);
}
Value
do_Debug_dump (Value f)
{
ENTER ();
CodePtr code;
if (!ValueIsFunc (f))
{
RaiseStandardException (exception_invalid_argument, 3,
NewStrString ("dump: not a function"),
NewInt (0), f);
RETURN (Void);
}
code = f->func.code;
if (code->base.builtin)
{
FilePuts (FileStdout, "<builtin>\n");
RETURN (Void);
}
if (code->func.staticInit.obj)
{
FilePuts (FileStdout, "Static initializers\n");
ObjDump (code->func.staticInit.obj, 2);
FilePuts (FileStdout, "\n");
}
FilePuts (FileStdout, "Function body\n");
ObjDump (code->func.body.obj, 1);
RETURN (Void);
}
#ifdef MEM_TRACE
Value
do_Debug_dump_active (void)
{
MemCollect ();
MemActiveDump ();
return Void;
}
#endif
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