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cmd/compile: batch write barrier calls

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Have the write barrier call return a pointer to a buffer into which
the generated code records pointers that need write barrier treatment.

Change-Id: I7871764298e0aa1513de417010c8d46b296b199e
Reviewed-on: https://go-review.googlesource.com/c/go/+/447781
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Bypass: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Keith Randall 2022-11-01 16:46:43 -07:00
parent f684f3dc43
commit 21d82e6ac8
42 changed files with 712 additions and 395 deletions
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34
src/cmd/link/internal/wasm/asm.go
View file

@ -55,19 +55,27 @@ type wasmFuncType struct {
}
var wasmFuncTypes = map[string]*wasmFuncType{
"_rt0_wasm_js": {Params: []byte{}}, //
"wasm_export_run": {Params: []byte{I32, I32}}, // argc, argv
"wasm_export_resume": {Params: []byte{}}, //
"wasm_export_getsp": {Results: []byte{I32}}, // sp
"wasm_pc_f_loop": {Params: []byte{}}, //
"runtime.wasmDiv": {Params: []byte{I64, I64}, Results: []byte{I64}}, // x, y -> x/y
"runtime.wasmTruncS": {Params: []byte{F64}, Results: []byte{I64}}, // x -> int(x)
"runtime.wasmTruncU": {Params: []byte{F64}, Results: []byte{I64}}, // x -> uint(x)
"runtime.gcWriteBarrier": {Params: []byte{I64, I64}}, // ptr, val
"cmpbody": {Params: []byte{I64, I64, I64, I64}, Results: []byte{I64}}, // a, alen, b, blen -> -1/0/1
"memeqbody": {Params: []byte{I64, I64, I64}, Results: []byte{I64}}, // a, b, len -> 0/1
"memcmp": {Params: []byte{I32, I32, I32}, Results: []byte{I32}}, // a, b, len -> <0/0/>0
"memchr": {Params: []byte{I32, I32, I32}, Results: []byte{I32}}, // s, c, len -> index
"_rt0_wasm_js": {Params: []byte{}}, //
"wasm_export_run": {Params: []byte{I32, I32}}, // argc, argv
"wasm_export_resume": {Params: []byte{}}, //
"wasm_export_getsp": {Results: []byte{I32}}, // sp
"wasm_pc_f_loop": {Params: []byte{}}, //
"runtime.wasmDiv": {Params: []byte{I64, I64}, Results: []byte{I64}}, // x, y -> x/y
"runtime.wasmTruncS": {Params: []byte{F64}, Results: []byte{I64}}, // x -> int(x)
"runtime.wasmTruncU": {Params: []byte{F64}, Results: []byte{I64}}, // x -> uint(x)
"gcWriteBarrier": {Params: []byte{I64}, Results: []byte{I64}}, // #bytes -> bufptr
"runtime.gcWriteBarrier1": {Results: []byte{I64}}, // -> bufptr
"runtime.gcWriteBarrier2": {Results: []byte{I64}}, // -> bufptr
"runtime.gcWriteBarrier3": {Results: []byte{I64}}, // -> bufptr
"runtime.gcWriteBarrier4": {Results: []byte{I64}}, // -> bufptr
"runtime.gcWriteBarrier5": {Results: []byte{I64}}, // -> bufptr
"runtime.gcWriteBarrier6": {Results: []byte{I64}}, // -> bufptr
"runtime.gcWriteBarrier7": {Results: []byte{I64}}, // -> bufptr
"runtime.gcWriteBarrier8": {Results: []byte{I64}}, // -> bufptr
"cmpbody": {Params: []byte{I64, I64, I64, I64}, Results: []byte{I64}}, // a, alen, b, blen -> -1/0/1
"memeqbody": {Params: []byte{I64, I64, I64}, Results: []byte{I64}}, // a, b, len -> 0/1
"memcmp": {Params: []byte{I32, I32, I32}, Results: []byte{I32}}, // a, b, len -> <0/0/>0
"memchr": {Params: []byte{I32, I32, I32}, Results: []byte{I32}}, // s, c, len -> index
}
func assignAddress(ldr *loader.Loader, sect *sym.Section, n int, s loader.Sym, va uint64, isTramp bool) (*sym.Section, int, uint64) {