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MozillaFirefox/mozilla-bmo1756347.patch

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# HG changeset patch
# User Wolfgang Rosenauer <wr@rosenauer.org>
# Parent f805a250257be9c3ea570b34557150450e16dfec
diff --git a/js/src/jit/GenerateAtomicOperations.py b/js/src/jit/GenerateAtomicOperations.py
--- a/js/src/jit/GenerateAtomicOperations.py
+++ b/js/src/jit/GenerateAtomicOperations.py
@@ -5,40 +5,41 @@
# This script generates jit/AtomicOperationsGenerated.h
#
# See the big comment in jit/AtomicOperations.h for an explanation.
import buildconfig
is_64bit = "JS_64BIT" in buildconfig.defines
cpu_arch = buildconfig.substs["CPU_ARCH"]
+is_gcc = buildconfig.substs["CC_TYPE"] == "gcc"
def fmt_insn(s):
return '"' + s + '\\n\\t"\n'
def gen_seqcst(fun_name):
if cpu_arch in ("x86", "x86_64"):
return r"""
- inline void %(fun_name)s() {
+ INLINE_ATTR void %(fun_name)s() {
asm volatile ("mfence\n\t" ::: "memory");
}""" % {
"fun_name": fun_name,
}
if cpu_arch == "aarch64":
return r"""
- inline void %(fun_name)s() {
+ INLINE_ATTR void %(fun_name)s() {
asm volatile ("dmb ish\n\t" ::: "memory");
}""" % {
"fun_name": fun_name,
}
if cpu_arch == "arm":
return r"""
- inline void %(fun_name)s() {
+ INLINE_ATTR void %(fun_name)s() {
asm volatile ("dmb sy\n\t" ::: "memory");
}""" % {
"fun_name": fun_name,
}
raise Exception("Unexpected arch")
def gen_load(fun_name, cpp_type, size, barrier):
@@ -58,17 +59,17 @@ def gen_load(fun_name, cpp_type, size, b
elif size == 32:
insns += fmt_insn("movl (%[arg]), %[res]")
else:
assert size == 64
insns += fmt_insn("movq (%[arg]), %[res]")
if barrier:
insns += fmt_insn("mfence")
return """
- inline %(cpp_type)s %(fun_name)s(const %(cpp_type)s* arg) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(const %(cpp_type)s* arg) {
%(cpp_type)s res;
asm volatile (%(insns)s
: [res] "=r" (res)
: [arg] "r" (arg)
: "memory");
return res;
}""" % {
"cpp_type": cpp_type,
@@ -86,17 +87,17 @@ def gen_load(fun_name, cpp_type, size, b
elif size == 32:
insns += fmt_insn("ldr %w[res], [%x[arg]]")
else:
assert size == 64
insns += fmt_insn("ldr %x[res], [%x[arg]]")
if barrier:
insns += fmt_insn("dmb ish")
return """
- inline %(cpp_type)s %(fun_name)s(const %(cpp_type)s* arg) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(const %(cpp_type)s* arg) {
%(cpp_type)s res;
asm volatile (%(insns)s
: [res] "=r" (res)
: [arg] "r" (arg)
: "memory");
return res;
}""" % {
"cpp_type": cpp_type,
@@ -112,17 +113,17 @@ def gen_load(fun_name, cpp_type, size, b
elif size == 16:
insns += fmt_insn("ldrh %[res], [%[arg]]")
else:
assert size == 32
insns += fmt_insn("ldr %[res], [%[arg]]")
if barrier:
insns += fmt_insn("dmb sy")
return """
- inline %(cpp_type)s %(fun_name)s(const %(cpp_type)s* arg) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(const %(cpp_type)s* arg) {
%(cpp_type)s res;
asm volatile (%(insns)s
: [res] "=r" (res)
: [arg] "r" (arg)
: "memory");
return res;
}""" % {
"cpp_type": cpp_type,
@@ -149,17 +150,17 @@ def gen_store(fun_name, cpp_type, size,
elif size == 32:
insns += fmt_insn("movl %[val], (%[addr])")
else:
assert size == 64
insns += fmt_insn("movq %[val], (%[addr])")
if barrier:
insns += fmt_insn("mfence")
return """
- inline void %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR void %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
asm volatile (%(insns)s
:
: [addr] "r" (addr), [val] "r"(val)
: "memory");
}""" % {
"cpp_type": cpp_type,
"fun_name": fun_name,
"insns": insns,
@@ -175,17 +176,17 @@ def gen_store(fun_name, cpp_type, size,
elif size == 32:
insns += fmt_insn("str %w[val], [%x[addr]]")
else:
assert size == 64
insns += fmt_insn("str %x[val], [%x[addr]]")
if barrier:
insns += fmt_insn("dmb ish")
return """
- inline void %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR void %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
asm volatile (%(insns)s
:
: [addr] "r" (addr), [val] "r"(val)
: "memory");
}""" % {
"cpp_type": cpp_type,
"fun_name": fun_name,
"insns": insns,
@@ -199,17 +200,17 @@ def gen_store(fun_name, cpp_type, size,
elif size == 16:
insns += fmt_insn("strh %[val], [%[addr]]")
else:
assert size == 32
insns += fmt_insn("str %[val], [%[addr]]")
if barrier:
insns += fmt_insn("dmb sy")
return """
- inline void %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR void %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
asm volatile (%(insns)s
:
: [addr] "r" (addr), [val] "r"(val)
: "memory");
}""" % {
"cpp_type": cpp_type,
"fun_name": fun_name,
"insns": insns,
@@ -230,17 +231,17 @@ def gen_exchange(fun_name, cpp_type, siz
elif size == 16:
insns += fmt_insn("xchgw %[val], (%[addr])")
elif size == 32:
insns += fmt_insn("xchgl %[val], (%[addr])")
else:
assert size == 64
insns += fmt_insn("xchgq %[val], (%[addr])")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
asm volatile (%(insns)s
: [val] "+r" (val)
: [addr] "r" (addr)
: "memory");
return val;
}""" % {
"cpp_type": cpp_type,
"fun_name": fun_name,
@@ -261,17 +262,17 @@ def gen_exchange(fun_name, cpp_type, siz
insns += fmt_insn("stxr %w[scratch], %w[val], [%x[addr]]")
else:
assert size == 64
insns += fmt_insn("ldxr %x[res], [%x[addr]]")
insns += fmt_insn("stxr %w[scratch], %x[val], [%x[addr]]")
insns += fmt_insn("cbnz %w[scratch], 0b")
insns += fmt_insn("dmb ish")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
%(cpp_type)s res;
uint32_t scratch;
asm volatile (%(insns)s
: [res] "=&r"(res), [scratch] "=&r"(scratch)
: [addr] "r" (addr), [val] "r"(val)
: "memory", "cc");
return res;
}""" % {
@@ -292,17 +293,17 @@ def gen_exchange(fun_name, cpp_type, siz
else:
assert size == 32
insns += fmt_insn("ldrex %[res], [%[addr]]")
insns += fmt_insn("strex %[scratch], %[val], [%[addr]]")
insns += fmt_insn("cmp %[scratch], #1")
insns += fmt_insn("beq 0b")
insns += fmt_insn("dmb sy")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
%(cpp_type)s res;
uint32_t scratch;
asm volatile (%(insns)s
: [res] "=&r"(res), [scratch] "=&r"(scratch)
: [addr] "r" (addr), [val] "r"(val)
: "memory", "cc");
return res;
}""" % {
@@ -316,33 +317,33 @@ def gen_exchange(fun_name, cpp_type, siz
def gen_cmpxchg(fun_name, cpp_type, size):
# NOTE: the assembly code must match the generated code in:
# - MacroAssembler::compareExchange
# - MacroAssembler::compareExchange64
if cpu_arch == "x86" and size == 64:
# Use a +A constraint to load `oldval` into EDX:EAX as input/output.
# `newval` is loaded into ECX:EBX.
return r"""
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
%(cpp_type)s oldval,
%(cpp_type)s newval) {
asm volatile ("lock; cmpxchg8b (%%[addr])\n\t"
: "+A" (oldval)
: [addr] "r" (addr),
"b" (uint32_t(newval & 0xffff'ffff)),
"c" (uint32_t(newval >> 32))
: "memory", "cc");
return oldval;
}""" % {
"cpp_type": cpp_type,
"fun_name": fun_name,
}
if cpu_arch == "arm" and size == 64:
return r"""
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
%(cpp_type)s oldval,
%(cpp_type)s newval) {
uint32_t oldval0 = oldval & 0xffff'ffff;
uint32_t oldval1 = oldval >> 32;
uint32_t newval0 = newval & 0xffff'ffff;
uint32_t newval1 = newval >> 32;
asm volatile (
"dmb sy\n\t"
@@ -375,17 +376,17 @@ def gen_cmpxchg(fun_name, cpp_type, size
elif size == 16:
insns += fmt_insn("lock; cmpxchgw %[newval], (%[addr])")
elif size == 32:
insns += fmt_insn("lock; cmpxchgl %[newval], (%[addr])")
else:
assert size == 64
insns += fmt_insn("lock; cmpxchgq %[newval], (%[addr])")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
%(cpp_type)s oldval,
%(cpp_type)s newval) {
asm volatile (%(insns)s
: [oldval] "+a" (oldval)
: [addr] "r" (addr), [newval] "r" (newval)
: "memory", "cc");
return oldval;
}""" % {
@@ -420,17 +421,17 @@ def gen_cmpxchg(fun_name, cpp_type, size
insns += fmt_insn("mov %x[scratch], %x[oldval]")
insns += fmt_insn("ldxr %x[res], [%x[addr]]")
insns += fmt_insn("cmp %x[res], %x[scratch]")
insns += fmt_insn("b.ne 1f")
insns += fmt_insn("stxr %w[scratch], %x[newval], [%x[addr]]")
insns += fmt_insn("cbnz %w[scratch], 0b")
insns += fmt_insn("1: dmb ish")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
%(cpp_type)s oldval,
%(cpp_type)s newval) {
%(cpp_type)s res, scratch;
asm volatile (%(insns)s
: [res] "=&r" (res), [scratch] "=&r" (scratch)
: [addr] "r" (addr), [oldval] "r"(oldval), [newval] "r" (newval)
: "memory", "cc");
return res;
@@ -461,17 +462,17 @@ def gen_cmpxchg(fun_name, cpp_type, size
insns += fmt_insn("ldrex %[res], [%[addr]]")
insns += fmt_insn("cmp %[res], %[scratch]")
insns += fmt_insn("bne 1f")
insns += fmt_insn("strex %[scratch], %[newval], [%[addr]]")
insns += fmt_insn("cmp %[scratch], #1")
insns += fmt_insn("beq 0b")
insns += fmt_insn("1: dmb sy")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr,
%(cpp_type)s oldval,
%(cpp_type)s newval) {
%(cpp_type)s res, scratch;
asm volatile (%(insns)s
: [res] "=&r" (res), [scratch] "=&r" (scratch)
: [addr] "r" (addr), [oldval] "r"(oldval), [newval] "r" (newval)
: "memory", "cc");
return res;
@@ -496,17 +497,17 @@ def gen_fetchop(fun_name, cpp_type, size
elif size == 16:
insns += fmt_insn("lock; xaddw %[val], (%[addr])")
elif size == 32:
insns += fmt_insn("lock; xaddl %[val], (%[addr])")
else:
assert size == 64
insns += fmt_insn("lock; xaddq %[val], (%[addr])")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
asm volatile (%(insns)s
: [val] "+&r" (val)
: [addr] "r" (addr)
: "memory", "cc");
return val;
}""" % {
"cpp_type": cpp_type,
"fun_name": fun_name,
@@ -534,17 +535,17 @@ def gen_fetchop(fun_name, cpp_type, size
assert size == 64
insns += fmt_insn("movq (%[addr]), %[res]")
insns += fmt_insn("0: movq %[res], %[scratch]")
insns += fmt_insn("OPq %[val], %[scratch]")
insns += fmt_insn("lock; cmpxchgq %[scratch], (%[addr])")
insns = insns.replace("OP", op)
insns += fmt_insn("jnz 0b")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
%(cpp_type)s res, scratch;
asm volatile (%(insns)s
: [res] "=&a" (res), [scratch] "=&r" (scratch)
: [addr] "r" (addr), [val] "r"(val)
: "memory", "cc");
return res;
}""" % {
"cpp_type": cpp_type,
@@ -576,17 +577,17 @@ def gen_fetchop(fun_name, cpp_type, size
if cpu_op == "or":
cpu_op = "orr"
if cpu_op == "xor":
cpu_op = "eor"
insns = insns.replace("OP", cpu_op)
insns += fmt_insn("cbnz %w[scratch2], 0b")
insns += fmt_insn("dmb ish")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
%(cpp_type)s res;
uintptr_t scratch1, scratch2;
asm volatile (%(insns)s
: [res] "=&r" (res), [scratch1] "=&r" (scratch1), [scratch2] "=&r"(scratch2)
: [addr] "r" (addr), [val] "r"(val)
: "memory", "cc");
return res;
}""" % {
@@ -616,17 +617,17 @@ def gen_fetchop(fun_name, cpp_type, size
cpu_op = "orr"
if cpu_op == "xor":
cpu_op = "eor"
insns = insns.replace("OP", cpu_op)
insns += fmt_insn("cmp %[scratch2], #1")
insns += fmt_insn("beq 0b")
insns += fmt_insn("dmb sy")
return """
- inline %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
+ INLINE_ATTR %(cpp_type)s %(fun_name)s(%(cpp_type)s* addr, %(cpp_type)s val) {
%(cpp_type)s res;
uintptr_t scratch1, scratch2;
asm volatile (%(insns)s
: [res] "=&r" (res), [scratch1] "=&r" (scratch1), [scratch2] "=&r"(scratch2)
: [addr] "r" (addr), [val] "r"(val)
: "memory", "cc");
return res;
}""" % {
@@ -660,33 +661,33 @@ def gen_copy(fun_name, cpp_type, size, u
insns += fmt_insn("ldrb %w[scratch], [%x[src], OFFSET]")
insns += fmt_insn("strb %w[scratch], [%x[dst], OFFSET]")
else:
assert size == 8
insns += fmt_insn("ldr %x[scratch], [%x[src], OFFSET]")
insns += fmt_insn("str %x[scratch], [%x[dst], OFFSET]")
elif cpu_arch == "arm":
if size == 1:
- insns += fmt_insn("ldrb %[scratch], [%[src], OFFSET]")
- insns += fmt_insn("strb %[scratch], [%[dst], OFFSET]")
+ insns += fmt_insn("ldrb %[scratch], [%[src], #OFFSET]")
+ insns += fmt_insn("strb %[scratch], [%[dst], #OFFSET]")
else:
assert size == 4
- insns += fmt_insn("ldr %[scratch], [%[src], OFFSET]")
- insns += fmt_insn("str %[scratch], [%[dst], OFFSET]")
+ insns += fmt_insn("ldr %[scratch], [%[src], #OFFSET]")
+ insns += fmt_insn("str %[scratch], [%[dst], #OFFSET]")
else:
raise Exception("Unexpected arch")
insns = insns.replace("OFFSET", str(offset * size))
if direction == "down":
offset += 1
else:
offset -= 1
return """
- inline void %(fun_name)s(uint8_t* dst, const uint8_t* src) {
+ INLINE_ATTR void %(fun_name)s(uint8_t* dst, const uint8_t* src) {
%(cpp_type)s* dst_ = reinterpret_cast<%(cpp_type)s*>(dst);
const %(cpp_type)s* src_ = reinterpret_cast<const %(cpp_type)s*>(src);
%(cpp_type)s scratch;
asm volatile (%(insns)s
: [scratch] "=&r" (scratch)
: [dst] "r" (dst_), [src] "r"(src_)
: "memory");
}""" % {
@@ -848,14 +849,21 @@ def generate_atomics_header(c_out):
"constexpr size_t JS_GENERATED_ATOMICS_BLOCKSIZE = "
+ str(blocksize)
+ ";\n"
)
contents += (
"constexpr size_t JS_GENERATED_ATOMICS_WORDSIZE = " + str(wordsize) + ";\n"
)
+ # Work around a GCC issue on 32-bit x86 by adding MOZ_NEVER_INLINE.
+ # See bug 1756347.
+ if is_gcc and cpu_arch == "x86":
+ contents = contents.replace("INLINE_ATTR", "MOZ_NEVER_INLINE inline")
+ else:
+ contents = contents.replace("INLINE_ATTR", "inline")
+
c_out.write(
HEADER_TEMPLATE
% {
"contents": contents,
}
)
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