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Support for GC working in Emscripten environment

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Support for GC working in Emscripten environment
This commit is contained in:
Andrey Sobolev
2015-09-11 17:36:35 +06:00
parent 6b645c50d5
commit 9cdfdde344
1 changed files with 7 additions and 5 deletions
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12
lib/system/gc_common.nim
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@@ -95,7 +95,9 @@ proc setupForeignThreadGc*() =
# ----------------- stack management --------------------------------------
# inspired from Smart Eiffel
when defined(sparc):
when defined(emscripten):
const stackIncreases = true
elif defined(sparc):
const stackIncreases = false
elif defined(hppa) or defined(hp9000) or defined(hp9000s300) or
defined(hp9000s700) or defined(hp9000s800) or defined(hp9000s820):
@@ -173,14 +175,14 @@ elif stackIncreases:
# in a platform independent way
template forEachStackSlot(gch, gcMark: expr) {.immediate, dirty.} =
var registers: C_JmpBuf
var registers {.noinit.}: C_JmpBuf
if c_setjmp(registers) == 0'i32: # To fill the C stack with registers.
var max = cast[TAddress](gch.stackBottom)
var sp = cast[TAddress](addr(registers)) +% jmpbufSize -% sizeof(pointer)
var max = cast[ByteAddress](gch.stackBottom)
var sp = cast[ByteAddress](addr(registers)) +% jmpbufSize -% sizeof(pointer)
# sp will traverse the JMP_BUF as well (jmp_buf size is added,
# otherwise sp would be below the registers structure).
while sp >=% max:
gcMark(gch, cast[ppointer](sp)[])
gcMark(gch, cast[PPointer](sp)[])
sp = sp -% sizeof(pointer)
else: