da0161d6ab
On WebAssembly it is possible to grow the heap with the memory.grow instruction. This commit implements this feature and with that also removes the -heap-size flag that was reportedly broken (I haven't verified that). This should make it easier to use TinyGo for WebAssembly, where there was no good reason to use a fixed heap size. This commit has no effect on baremetal targets with optimizations enabled.
24 строки
635 Б
Go
24 строки
635 Б
Go
// +build darwin linux,!baremetal,!wasi freebsd,!baremetal
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// +build !nintendoswitch
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// +build gc.conservative gc.leaking
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package runtime
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const heapSize = 1 * 1024 * 1024 // 1MB to start
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var heapStart, heapEnd uintptr
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func preinit() {
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heapStart = uintptr(malloc(heapSize))
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heapEnd = heapStart + heapSize
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}
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// growHeap tries to grow the heap size. It returns true if it succeeds, false
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// otherwise.
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func growHeap() bool {
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// At the moment, this is not possible. However it shouldn't be too
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// difficult (at least on Linux) to allocate a large amount of virtual
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// memory at startup that is then slowly used.
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return false
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}
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