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Ayke van Laethem
4643401a1d
Instead of markGlobals calling markRoots unconditionally (which doesn't
make sense for -gc=none and -gc=leaking), provide markRoots as a
callback function.
This is in preparation for -gc=boehm, where the previous design is even
more awkward and a callback makes far more sense.
I've tested the size impact using `make smoketest XTENSA=0`. There is
none, except for two cases:
* One with `-opt=0` so const-propagation for the callback didn't take
place.
* One other on AVR, I don't know why but as it's only 16 bytes in a
very specific case I'm going to assume it's just a random change in
compiler output that caused a size difference.
40 lines
861 B
Go
40 lines
861 B
Go
//go:build gc.none
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package runtime
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// This GC strategy provides no memory allocation at all. It can be useful to
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// detect where in a program memory is allocated (via linker errors) or for
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// targets that have far too little RAM even for the leaking memory allocator.
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import (
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"unsafe"
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)
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var gcTotalAlloc uint64 // for runtime.MemStats
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var gcMallocs uint64
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var gcFrees uint64
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func alloc(size uintptr, layout unsafe.Pointer) unsafe.Pointer
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func realloc(ptr unsafe.Pointer, size uintptr) unsafe.Pointer
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func free(ptr unsafe.Pointer) {
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// Nothing to free when nothing gets allocated.
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}
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func GC() {
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// Unimplemented.
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}
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func SetFinalizer(obj interface{}, finalizer interface{}) {
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// Unimplemented.
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}
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func initHeap() {
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// Nothing to initialize.
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}
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func setHeapEnd(newHeapEnd uintptr) {
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// Nothing to do here, this function is never actually called.
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}
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