Scan Kernel Alloc Once page for global pointers
Summary: libxpc stashes some pointers here.
Reviewers: kubamracek, alekseyshl
Subscribers: llvm-commits
#include <pthread.h>
+#include <mach/mach.h>
+
namespace __lsan {
typedef struct {
@@ -113,8 +115,32 @@ void ProcessGlobalRegions(Frontier *frontier) {
}
}
+// libxpc stashes some pointers in the Kernel Alloc Once page,
+// make sure not to report those as leaks.
void ProcessPlatformSpecificAllocations(Frontier *frontier) {
- CHECK(0 && "unimplemented");
+ mach_port_name_t port;
+ if (task_for_pid(mach_task_self(), internal_getpid(), &port)
+ != KERN_SUCCESS) {
+ return;
+ }
+
+ unsigned depth = 1;
+ vm_size_t size = 0;
+ vm_address_t address = 0;
+ kern_return_t err = KERN_SUCCESS;
+ mach_msg_type_number_t count = VM_REGION_SUBMAP_INFO_COUNT_64;
+
+ while (err == KERN_SUCCESS) {
+ struct vm_region_submap_info_64 info;
+ err = vm_region_recurse_64(port, &address, &size, &depth,
+ (vm_region_info_t)&info, &count);
+ if (info.user_tag == VM_MEMORY_OS_ALLOC_ONCE) {
+ ScanRangeForPointers(address, address + size, frontier,
+ "GLOBAL", kReachable);
+ return;
+ }
+ address += size;
+ }
}
void DoStopTheWorld(StopTheWorldCallback callback, void *argument) {
