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Bug 1128653 - Make the native code bounds of optimization regions closed. (r=djvj)

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This commit is contained in:
Shu-yu Guo 2015-02-03 18:55:25 -08:00
parent 821f1fdb62
commit c259272bee
1 changed files with 11 additions and 5 deletions
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16
js/src/jit/OptimizationTracking.cpp
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@ -475,6 +475,12 @@ IonTrackedOptimizationsRegion::findAttemptsIndex(uint32_t offset) const
Maybe<IonTrackedOptimizationsRegion>
IonTrackedOptimizationsRegionTable::findRegion(uint32_t offset) const
{
// For two contiguous regions, e.g., [i, j] and [j, k], an offset exactly
// at j will be associated with [i, j] instead of [j, k]. An offset
// exactly at j is often a return address from a younger frame, which case
// the next region, despite starting at j, has not yet logically started
// execution.
static const uint32_t LINEAR_SEARCH_THRESHOLD = 8;
uint32_t regions = numEntries();
MOZ_ASSERT(regions > 0);
@ -483,7 +489,7 @@ IonTrackedOptimizationsRegionTable::findRegion(uint32_t offset) const
if (regions <= LINEAR_SEARCH_THRESHOLD) {
for (uint32_t i = 0; i < regions; i++) {
IonTrackedOptimizationsRegion region = entry(i);
if (region.startOffset() <= offset && offset < region.endOffset()) {
if (region.startOffset() <= offset && offset <= region.endOffset()) {
return Some(entry(i));
}
}
@ -500,7 +506,7 @@ IonTrackedOptimizationsRegionTable::findRegion(uint32_t offset) const
if (offset < region.startOffset()) {
// Entry is below mid.
regions = step;
} else if (offset >= region.endOffset()) {
} else if (offset > region.endOffset()) {
// Entry is above mid.
i = mid;
regions -= step;
@ -703,14 +709,14 @@ IonTrackedOptimizationsRegion::WriteRun(CompactBufferWriter &writer,
const UniqueTrackedOptimizations &unique)
{
// Write the header, which is the range that this whole run encompasses.
JitSpew(JitSpew_OptimizationTracking, " Header: [%u, %u)",
JitSpew(JitSpew_OptimizationTracking, " Header: [%u, %u]",
start->startOffset.offset(), (end - 1)->endOffset.offset());
writer.writeUnsigned(start->startOffset.offset());
writer.writeUnsigned((end - 1)->endOffset.offset());
// Write the first entry of the run, which is not delta-encoded.
JitSpew(JitSpew_OptimizationTracking,
" [%6u, %6u) vector %3u, offset %4u",
" [%6u, %6u] vector %3u, offset %4u",
start->startOffset.offset(), start->endOffset.offset(),
unique.indexOf(start->optimizations), writer.length());
uint32_t prevEndOffset = start->endOffset.offset();
@ -727,7 +733,7 @@ IonTrackedOptimizationsRegion::WriteRun(CompactBufferWriter &writer,
uint8_t index = unique.indexOf(entry->optimizations);
JitSpew(JitSpew_OptimizationTracking,
" [%6u, %6u) delta [+%5u, +%5u) vector %3u, offset %4u",
" [%6u, %6u] delta [+%5u, +%5u] vector %3u, offset %4u",
startOffset, endOffset, startDelta, length, index, writer.length());
WriteDelta(writer, startDelta, length, index);