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added debugging method 'vmAddressFromLine'

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This commit is contained in:
Josh warner 2009-06-11 09:44:37 -06:00
parent 862c37f9ad
commit 9681a8a1ff
1 changed files with 26 additions and 0 deletions
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26
src/machine.cpp
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@ -3009,3 +3009,29 @@ vmPrintTrace(Thread* t)
t->m->processor->walkStack(t, &v);
}
// also for debugging
void*
vmAddressFromLine(Thread* t, object m, unsigned line)
{
object code = methodCode(t, m);
printf("code: %p\n", code);
object lnt = codeLineNumberTable(t, code);
printf("lnt: %p\n", lnt);
if (lnt) {
unsigned last = 0;
unsigned bottom = 0;
unsigned top = lineNumberTableLength(t, lnt);
for(unsigned i = bottom; i < top; i++)
{
LineNumber* ln = lineNumberTableBody(t, lnt, i);
if(lineNumberLine(ln) == line)
return reinterpret_cast<void*>(lineNumberIp(ln));
else if(lineNumberLine(ln) > line)
return reinterpret_cast<void*>(last);
last = lineNumberIp(ln);
}
}
return 0;
}