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fix special case of exception handler table translation

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scalac may generate bytecode such that an exception is thrown within
the bounds of a handler for that exception such that the throw is the
last instruction in the method, which we weren't handling properly.
This commit is contained in:
Joel Dice 2013-04-22 21:25:15 -06:00
parent a18452f6c9
commit 023787d121
1 changed files with 13 additions and 9 deletions
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22
src/compile.cpp
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@ -6459,11 +6459,11 @@ resolveIpBackwards(Context* context, int start, int end)
if (start >= static_cast<int>
(codeLength(t, methodCode(t, context->method))))
{
start = codeLength(t, methodCode(t, context->method)) - 1;
}
while (start >= end and context->visitTable[start] == 0) {
-- start;
start = codeLength(t, methodCode(t, context->method));
} else {
while (start >= end and context->visitTable[start] == 0) {
-- start;
}
}
if (start < end) {
@ -6523,7 +6523,8 @@ truncateLineNumberTable(Thread* t, object table, unsigned length)
}
object
translateExceptionHandlerTable(MyThread* t, Context* context, intptr_t start)
translateExceptionHandlerTable(MyThread* t, Context* context, intptr_t start,
intptr_t end)
{
avian::codegen::Compiler* c = context->compiler;
@ -6559,14 +6560,16 @@ translateExceptionHandlerTable(MyThread* t, Context* context, intptr_t start)
exceptionHandlerStart(oldHandler));
assert(t, handlerEnd >= 0);
assert(t, handlerEnd < static_cast<int>
assert(t, handlerEnd <= static_cast<int>
(codeLength(t, methodCode(t, context->method))));
intArrayBody(t, newIndex, ni * 3)
= c->machineIp(handlerStart)->value() - start;
intArrayBody(t, newIndex, (ni * 3) + 1)
= c->machineIp(handlerEnd)->value() - start;
= (handlerEnd == static_cast<int>
(codeLength(t, methodCode(t, context->method)))
? end : c->machineIp(handlerEnd)->value()) - start;
intArrayBody(t, newIndex, (ni * 3) + 2)
= c->machineIp(exceptionHandlerIp(oldHandler))->value() - start;
@ -7339,7 +7342,8 @@ finish(MyThread* t, FixedAllocator* allocator, Context* context)
}
{ object newExceptionHandlerTable = translateExceptionHandlerTable
(t, context, reinterpret_cast<intptr_t>(start));
(t, context, reinterpret_cast<intptr_t>(start),
reinterpret_cast<intptr_t>(start) + codeSize);
PROTECT(t, newExceptionHandlerTable);