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92 lines
3.4 KiB
C++
92 lines
3.4 KiB
C++
//===-- Verifier.cpp - Implement the Module Verifier -------------*- C++ -*-==//
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//
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// This file defines the method verifier interface, that can be used for some
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// sanity checking of input to the system.
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//
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// Note that this does not provide full 'java style' security and verifications,
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// instead it just tries to ensure that code is well formed.
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//
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// . There are no duplicated names in a symbol table... ie there !exist a val
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// with the same name as something in the symbol table, but with a different
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// address as what is in the symbol table...
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// . Both of a binary operator's parameters are the same type
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// . Verify that arithmetic and other things are only performed on first class
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// types. No adding structures or arrays.
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// . All of the constants in a switch statement are of the correct type
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// . The code is in valid SSA form
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// . It should be illegal to put a label into any other type (like a structure)
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// or to return one. [except constant arrays!]
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// . Right now 'add bool 0, 0' is valid. This isn't particularly good.
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// . Only phi nodes can be self referential: 'add int 0, 0 ; <int>:0' is bad
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// . PHI nodes must have an entry for each predecessor, with no extras.
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// . All other things that are tested by asserts spread about the code...
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// . All basic blocks should only end with terminator insts, not contain them
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// . All methods must have >= 1 basic block
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// . Verify that none of the Value getType()'s are null.
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// . Method's cannot take a void typed parameter
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// . Verify that a method's argument list agrees with it's declared type.
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// . Verify that arrays and structures have fixed elements: No unsized arrays.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/Method.h"
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#include "llvm/Module.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/Type.h"
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// Error - Define a macro to do the common task of pushing a message onto the
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// end of the error list and setting Bad to true.
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//
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#define Error(msg) do { ErrorMsgs.push_back(msg); Bad = true; } while (0)
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#define t(x) (1 << (unsigned)Type::x)
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#define SignedIntegralTypes (t(SByteTyID) | t(ShortTyID) | \
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t(IntTyID) | t(LongTyID))
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static long UnsignedIntegralTypes = t(UByteTyID) | t(UShortTyID) |
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t(UIntTyID) | t(ULongTyID);
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static const long FloatingPointTypes = t(FloatTyID) | t(DoubleTyID);
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static const long IntegralTypes = SignedIntegralTypes | UnsignedIntegralTypes;
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#if 0
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static long ValidTypes[Type::FirstDerivedTyID] = {
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[(unsigned)Instruction::UnaryOps::Not] t(BoolTyID),
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//[Instruction::UnaryOps::Add] = IntegralTypes,
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// [Instruction::Sub] = IntegralTypes,
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};
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#endif
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#undef t
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static bool verify(const BasicBlock *BB, vector<string> &ErrorMsgs) {
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bool Bad = false;
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if (BB->getTerminator() == 0) Error("Basic Block does not have terminator!");
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return Bad;
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}
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bool verify(const Method *M, vector<string> &ErrorMsgs) {
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bool Bad = false;
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for (Method::const_iterator BBIt = M->begin();
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BBIt != M->end(); ++BBIt)
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Bad |= verify(*BBIt, ErrorMsgs);
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return Bad;
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}
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bool verify(const Module *C, vector<string> &ErrorMsgs) {
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bool Bad = false;
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assert(Type::FirstDerivedTyID-1 < sizeof(long)*8 &&
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"Resize ValidTypes table to handle more than 32 primitive types!");
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for (Module::const_iterator MI = C->begin(); MI != C->end(); ++MI)
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Bad |= verify(*MI, ErrorMsgs);
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return Bad;
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}
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