diff --git a/compiler-rt/lib/hwasan/CMakeLists.txt b/compiler-rt/lib/hwasan/CMakeLists.txt
--- a/compiler-rt/lib/hwasan/CMakeLists.txt
+++ b/compiler-rt/lib/hwasan/CMakeLists.txt
@@ -164,6 +164,7 @@
                 RTSanitizerCommonLibc
                 RTSanitizerCommonCoverage
                 RTSanitizerCommonSymbolizer
+                RTLSanCommon
                 RTUbsan
     CFLAGS ${hwasan_rtl_flags}
     PARENT_TARGET hwasan)
@@ -200,6 +201,7 @@
             RTSanitizerCommonLibc
             RTSanitizerCommonCoverage
             RTSanitizerCommonSymbolizer
+            RTLSanCommon
             RTUbsan
             RTUbsan_cxx
             # The only purpose of RTHWAsan_dynamic_version_script_dummy is to
diff --git a/compiler-rt/lib/hwasan/hwasan.h b/compiler-rt/lib/hwasan/hwasan.h
--- a/compiler-rt/lib/hwasan/hwasan.h
+++ b/compiler-rt/lib/hwasan/hwasan.h
@@ -144,6 +144,8 @@
 
 void HwasanInstallAtForkHandler();
 
+void InstallAtExitCheckLeaks();
+
 void UpdateMemoryUsage();
 
 void AppendToErrorMessageBuffer(const char *buffer);
diff --git a/compiler-rt/lib/hwasan/hwasan.cpp b/compiler-rt/lib/hwasan/hwasan.cpp
--- a/compiler-rt/lib/hwasan/hwasan.cpp
+++ b/compiler-rt/lib/hwasan/hwasan.cpp
@@ -86,6 +86,8 @@
     cf.clear_shadow_mmap_threshold = 4096 * (SANITIZER_ANDROID ? 2 : 8);
     // Sigtrap is used in error reporting.
     cf.handle_sigtrap = kHandleSignalExclusive;
+    // FIXME: enable once all false positives have been fixed.
+    cf.detect_leaks = false;
 
 #if SANITIZER_ANDROID
     // Let platform handle other signals. It is better at reporting them then we
@@ -106,6 +108,15 @@
   RegisterHwasanFlags(&parser, f);
   RegisterCommonFlags(&parser);
 
+#if CAN_SANITIZE_LEAKS
+  __lsan::Flags *lf = __lsan::flags();
+  lf->SetDefaults();
+
+  FlagParser lsan_parser;
+  __lsan::RegisterLsanFlags(&lsan_parser, lf);
+  RegisterCommonFlags(&lsan_parser);
+#endif
+
 #if HWASAN_CONTAINS_UBSAN
   __ubsan::Flags *uf = __ubsan::flags();
   uf->SetDefaults();
@@ -124,6 +135,9 @@
 #endif
 
   parser.ParseStringFromEnv("HWASAN_OPTIONS");
+#if CAN_SANITIZE_LEAKS
+  lsan_parser.ParseStringFromEnv("LSAN_OPTIONS");
+#endif
 #if HWASAN_CONTAINS_UBSAN
   ubsan_parser.ParseStringFromEnv("UBSAN_OPTIONS");
 #endif
@@ -133,6 +147,12 @@
   if (Verbosity()) ReportUnrecognizedFlags();
 
   if (common_flags()->help) parser.PrintFlagDescriptions();
+  // Flag validation:
+  if (!CAN_SANITIZE_LEAKS && common_flags()->detect_leaks) {
+    Report("%s: detect_leaks is not supported on this platform.\n",
+           SanitizerToolName);
+    Die();
+  }
 }
 
 static void CheckUnwind() {
@@ -368,10 +388,22 @@
   HwasanAllocatorInit();
   HwasanInstallAtForkHandler();
 
+  if (CAN_SANITIZE_LEAKS) {
+    __lsan::InitCommonLsan();
+    InstallAtExitCheckLeaks();
+  }
+
 #if HWASAN_CONTAINS_UBSAN
   __ubsan::InitAsPlugin();
 #endif
 
+  if (CAN_SANITIZE_LEAKS) {
+    __lsan::ScopedInterceptorDisabler disabler;
+    Symbolizer::LateInitialize();
+  } else {
+    Symbolizer::LateInitialize();
+  }
+
   VPrintf(1, "HWAddressSanitizer init done\n");
 
   hwasan_init_is_running = 0;
diff --git a/compiler-rt/lib/hwasan/hwasan_fuchsia.cpp b/compiler-rt/lib/hwasan/hwasan_fuchsia.cpp
--- a/compiler-rt/lib/hwasan/hwasan_fuchsia.cpp
+++ b/compiler-rt/lib/hwasan/hwasan_fuchsia.cpp
@@ -185,6 +185,8 @@
 
 void HwasanInstallAtForkHandler() {}
 
+void InstallAtExitCheckLeaks() {}
+
 void InitializeOsSupport() {
 #ifdef __aarch64__
   uint32_t features = 0;
diff --git a/compiler-rt/lib/hwasan/hwasan_interceptors.cpp b/compiler-rt/lib/hwasan/hwasan_interceptors.cpp
--- a/compiler-rt/lib/hwasan/hwasan_interceptors.cpp
+++ b/compiler-rt/lib/hwasan/hwasan_interceptors.cpp
@@ -220,6 +220,10 @@
 namespace __hwasan {
 
 int OnExit() {
+  if (CAN_SANITIZE_LEAKS && common_flags()->detect_leaks &&
+      __lsan::HasReportedLeaks()) {
+    return common_flags()->exitcode;
+  }
   // FIXME: ask frontend whether we need to return failure.
   return 0;
 }
diff --git a/compiler-rt/lib/hwasan/hwasan_linux.cpp b/compiler-rt/lib/hwasan/hwasan_linux.cpp
--- a/compiler-rt/lib/hwasan/hwasan_linux.cpp
+++ b/compiler-rt/lib/hwasan/hwasan_linux.cpp
@@ -541,6 +541,17 @@
   pthread_atfork(before, after, after);
 }
 
+void InstallAtExitCheckLeaks() {
+  if (CAN_SANITIZE_LEAKS) {
+    if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit) {
+      if (flags()->halt_on_error)
+        Atexit(__lsan::DoLeakCheck);
+      else
+        Atexit(__lsan::DoRecoverableLeakCheckVoid);
+    }
+  }
+}
+
 }  // namespace __hwasan
 
 #endif  // SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD