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src/runtime: assert that a gc block addr isn't inside the metadata

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This commit is contained in:
Damian Gryski
2022-01-31 10:31:57 -08:00
committed by Ron Evans
parent e497b5c5ba
commit 3fa7d6cc40
1 changed files with 5 additions and 1 deletions
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src/runtime/gc_conservative.go
+5 -1
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@@ -110,7 +110,11 @@ func (b gcBlock) pointer() unsafe.Pointer {
// Return the address of the start of the allocated object. // Return the address of the start of the allocated object.
func (b gcBlock) address() uintptr { func (b gcBlock) address() uintptr {
return heapStart + uintptr(b)*bytesPerBlock addr := heapStart + uintptr(b)*bytesPerBlock
if gcAsserts && addr > uintptr(metadataStart) {
runtimePanic("gc: block pointing inside metadata")
}
return addr
} }
// findHead returns the head (first block) of an object, assuming the block // findHead returns the head (first block) of an object, assuming the block