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Fixing the stack walker. 

llvm-svn: 46302
This commit is contained in:
Gordon Henriksen 2008-01-24 05:16:36 +00:00
parent 1c91a67086
commit 520981b62f
1 changed files with 7 additions and 4 deletions
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11
llvm/runtime/GC/SemiSpace/semispace.c
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@ -97,25 +97,28 @@ void llvm_gc_write(void *V, void *ObjPtr, void **FieldPtr) { *FieldPtr = V; }
* FIXME: This should be in a code-generator specific library, but for now this
* will work for all code generators.
*/
typedef struct FrameMap FrameMap;
struct FrameMap {
int32_t NumRoots; // Number of roots in stack frame.
int32_t NumMeta; // Number of metadata descriptors. May be < NumRoots.
void *Meta[]; // May be absent for roots without metadata.
};
typedef struct StackEntry StackEntry;
struct StackEntry {
ShadowStackEntry *Next; // Caller's stack entry.
StackEntry *Next; // Caller's stack entry.
const FrameMap *Map; // Pointer to constant FrameMap.
void *Roots[]; // Stack roots (in-place array).
};
StackEntry *llvm_gc_root_chain;
void llvm_cg_walk_gcroots(void (*FP)(void **Root, void *Meta)) {
for (StackEntry *R; R; R = R->Next) {
StackEntry *R;
for (R = llvm_gc_root_chain; R; R = R->Next) {
unsigned i, e;
for (i = 0, e = R->NumMeta; i != e; ++i)
for (i = 0, e = R->Map->NumMeta; i != e; ++i)
FP(&R->Roots[i], R->Map->Meta[i]);
for (e = R->NumRoots; i != e; ++i)
for (e = R->Map->NumRoots; i != e; ++i)
FP(&R->Roots[i], NULL);
}
}