search for: globalnode

Is there some efficient way to find the malloc instructions which point to the memory represented by a DSNode? Right now the only way I see is by iterating through the value map in the DSGraph object and finding every value that points to my DSNode. A possibly related question: is there a way to tell that the node has been merged, and if so, what types of nodes went into the merge? Thanks,

...I wrote the following simple program: List *g; void alloc_func(){ g = ( List* ) malloc( sizeof( List ) ); } void free_func(){ free( g ); } int main(){ alloc_func(); free_func(); } I noticed that the DSnode for g in alloc_func is different from that of free_func and NEITHER of them had GlobalNode bit set in their types. Only the malloc bit and the incomplete bit have been set. I am completely clueless how to figure out if it is a global node or not. I used getGlobals and found that the returned map had size 0. How can I get the "common" global node of g?

...free( g ); > > } > > I don't have an LLVM tree available to me right now (as > tank/llvm.cs.uiuc.edu) is down, so take this with a grain of salt... > > > I noticed that the DSnode for g in alloc_func is different from that of > > free_func and NEITHER of them had GlobalNode bit set in their types. Only > > the malloc bit and the incomplete bit have been set. I am completely > > clueless how to figure out if it is a global node or not. I used > > getGlobals and found that the returned map had size 0. > > There may be a few different things goin...

We have created a new alias -- llvmbugs at cs.uiuc.edu. Please use this for reporting bugs or turning in patches for LLVM. Any such feedback would be appreciated! Please continue to use llvmdev to post questions or have discussions about LLVM. --Vikram http://www.cs.uiuc.edu/~vadve

...rry :) > A possibly related question: is there a way to tell that the node has > been merged, and if so, what types of nodes went into the merge? Yup, DSNode::NodeType contains flags for the node. There are four flags that indicate the composition of the node: DSNode::AllocaNode, HeapNode, GlobalNode, UnknownNode. When two nodes are merged, their Flags are bitwise or'd together... -Chris -- http://llvm.cs.uiuc.edu/ http://www.nondot.org/~sabre/Projects/

On Fri, 22 Nov 2002, lee white baugh wrote: > do calls to exit() always have a null target-function pointer? that is > what i think i am seeing. Currently, yes. What's actually happening is that the call gets moved to the "globals graph". Essentially, this is due to the fact that the function call cannot modify the local memory graph of the current function. In cases where

...t; } > void free_func(){ > free( g ); > } I don't have an LLVM tree available to me right now (as tank/llvm.cs.uiuc.edu) is down, so take this with a grain of salt... > I noticed that the DSnode for g in alloc_func is different from that of > free_func and NEITHER of them had GlobalNode bit set in their types. Only > the malloc bit and the incomplete bit have been set. I am completely > clueless how to figure out if it is a global node or not. I used > getGlobals and found that the returned map had size 0. There may be a few different things going on here. First of all,...

...================================== --- include/poolalloc/PoolAllocate.h (revision 44934) +++ include/poolalloc/PoolAllocate.h (working copy) @@ -144,7 +144,9 @@ /// map contains the global variable that holds the pool descriptor for the /// node. std::map<const DSNode*, Value*> GlobalNodes; - + protected: + PoolAllocate(intptr_t id, bool passAllArguments) + : ModulePass (id), PassAllArguments (passAllArguments) {} public: static char ID; #ifdef SAFECODE @@ -276,14 +278,14 @@ void CalculateLivePoolFreeBlocks(std::set<BasicBlock*> &LiveBlocks,Value *PD); };...

...> > > I don't have an LLVM tree available to me right now (as > > tank/llvm.cs.uiuc.edu) is down, so take this with a grain of salt... > > > > > I noticed that the DSnode for g in alloc_func is different from that of > > > free_func and NEITHER of them had GlobalNode bit set in their types. Only > > > the malloc bit and the incomplete bit have been set. I am completely > > > clueless how to figure out if it is a global node or not. I used > > > getGlobals and found that the returned map had size 0. > > > > There may be a f...

...related question: is there a way to tell that the node has > > been merged, and if so, what types of nodes went into the merge? > > Yup, DSNode::NodeType contains flags for the node. There are four flags > that indicate the composition of the node: DSNode::AllocaNode, HeapNode, > GlobalNode, UnknownNode. > > When two nodes are merged, their Flags are bitwise or'd together... I realized that, but what if two nodes of the same type are merged? Their flags will not indicate that a merge has occurred. I'm concerned about the case where two malloc nodes are merged, because...