[PATCH] D32012: Implement global pointer scanning for darwin leak sanitizer
Francis Ricci via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Apr 13 07:26:56 PDT 2017
fjricci created this revision.
https://reviews.llvm.org/D32012
Files:
lib/lsan/lsan_common_mac.cc
Index: lib/lsan/lsan_common_mac.cc
===================================================================
--- lib/lsan/lsan_common_mac.cc
+++ lib/lsan/lsan_common_mac.cc
@@ -91,7 +91,37 @@
// Scans global variables for heap pointers.
void ProcessGlobalRegions(Frontier *frontier) {
- CHECK(0 && "unimplemented");
+ MemoryMappingLayout memory_mapping(false);
+ InternalMmapVector<LoadedModule> modules(/*initial_capacity*/ 128);
+ memory_mapping.DumpListOfModules(&modules);
+ for (uptr i = 0; i < modules.size(); ++i) {
+ // Even when global scanning is disabled, we still need to scan
+ // system libraries for stashed pointers
+ if (!flags()->use_globals && modules[i].instrumented())
+ continue;
+
+ for (const __sanitizer::LoadedModule::AddressRange &range
+ : modules[i].ranges()) {
+ if (range.executable)
+ continue;
+
+ uptr allocator_begin = 0, allocator_end = 0;
+ GetAllocatorGlobalRange(&allocator_begin, &allocator_end);
+ if (range.beg <= allocator_begin && allocator_begin < range.end) {
+ CHECK_LE(allocator_begin, allocator_end);
+ CHECK_LE(allocator_end, range.end);
+ if (range.beg < allocator_begin)
+ ScanRangeForPointers(range.beg, allocator_begin, frontier, "GLOBAL",
+ kReachable);
+ if (allocator_end < range.end)
+ ScanRangeForPointers(allocator_end, range.end, frontier, "GLOBAL",
+ kReachable);
+ } else {
+ ScanRangeForPointers(range.beg, range.end, frontier, "GLOBAL",
+ kReachable);
+ }
+ }
+ }
}
void ProcessPlatformSpecificAllocations(Frontier *frontier) {
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