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Bug 1055034 r=mjrosenb

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This commit is contained in:
Jon Coppeard 2014-08-19 17:23:10 +01:00
parent dcaaaee21d
commit 6296053b68
3 changed files with 36 additions and 12 deletions
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13
js/src/jit-test/tests/gc/bug-1055034.js Normal file
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@ -0,0 +1,13 @@
function range(n, m) {
var result = [];
for (var i = n; i < m; i++)
result.push(i);
return result;
}
function run(arr, func) {
var expected = arr["map"].apply(arr, [func]);
function f(m) { return arr["mapPar"].apply(arr, [func, m]); }
f({mode:"compile"});
f({mode:"seq"});
}
run(range(0, 1024), function (i) { var a = []; a.length = i; });

8
js/src/jit/arm/Assembler-arm.cpp
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@ -808,8 +808,14 @@ TraceOneDataRelocation(JSTracer *trc, Iter *iter, MacroAssemblerARM *masm)
// No barrier needed since these are constants.
gc::MarkGCThingUnbarriered(trc, &ptr, "ion-masm-ptr");
if (ptr != prior)
if (ptr != prior) {
masm->ma_movPatchable(Imm32(int32_t(ptr)), dest, Assembler::Always, rs, ins);
// L_LDR won't cause any instructions to be updated.
if (rs != Assembler::L_LDR) {
AutoFlushICache::flush(uintptr_t(ins), 4);
AutoFlushICache::flush(uintptr_t(ins->next()), 4);
}
}
}
static void

27
js/src/jit/mips/Assembler-mips.cpp
View File

@ -280,17 +280,27 @@ Assembler::TraceJumpRelocations(JSTracer *trc, JitCode *code, CompactBufferReade
}
}
static void
TraceOneDataRelocation(JSTracer *trc, Instruction *inst)
{
void *ptr = (void *)Assembler::ExtractLuiOriValue(inst, inst->next());
void *prior = ptr;
// No barrier needed since these are constants.
gc::MarkGCThingUnbarriered(trc, reinterpret_cast<void **>(&ptr), "ion-masm-ptr");
if (ptr != prior) {
Assembler::UpdateLuiOriValue(inst, inst->next(), uint32_t(ptr));
AutoFlushICache::flush(uintptr_t(inst), 8);
}
}
static void
TraceDataRelocations(JSTracer *trc, uint8_t *buffer, CompactBufferReader &reader)
{
while (reader.more()) {
size_t offset = reader.readUnsigned();
Instruction *inst = (Instruction*)(buffer + offset);
void *ptr = (void *)Assembler::ExtractLuiOriValue(inst, inst->next());
// No barrier needed since these are constants.
gc::MarkGCThingUnbarriered(trc, reinterpret_cast<void **>(&ptr), "ion-masm-ptr");
Assembler::UpdateLuiOriValue(inst, inst->next(), uint32_t(ptr));
TraceOneDataRelocation(trc, inst);
}
}
@ -300,12 +310,7 @@ TraceDataRelocations(JSTracer *trc, MIPSBuffer *buffer, CompactBufferReader &rea
while (reader.more()) {
BufferOffset bo (reader.readUnsigned());
MIPSBuffer::AssemblerBufferInstIterator iter(bo, buffer);
void *ptr = (void *)Assembler::ExtractLuiOriValue(iter.cur(), iter.next());
// No barrier needed since these are constants.
gc::MarkGCThingUnbarriered(trc, reinterpret_cast<void **>(&ptr), "ion-masm-ptr");
Assembler::UpdateLuiOriValue(iter.cur(), iter.next(), uint32_t(ptr));
TraceOneDataRelocation(trc, iter.cur());
}
}