compiler-rt: Rename .cc file in lib/sanitizer_common to .cpp

See https://reviews.llvm.org/D58620 for discussion, and for the commands
I ran. In addition I also ran

  for f in $(svn diff | diffstat | grep .cc | cut -f 2 -d ' '); do rg $f . ; done

and manually updated (many) references to renamed files found by that.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@367463 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 139 insertions, 0 deletions

diff --git a/lib/sanitizer_common/sanitizer_common_libcdep.cpp b/lib/sanitizer_common/sanitizer_common_libcdep.cpp
new file mode 100644
index 000000000..27d6a1777
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_common_libcdep.cpp
@@ -0,0 +1,139 @@
+//===-- sanitizer_common_libcdep.cpp --------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is shared between AddressSanitizer and ThreadSanitizer
+// run-time libraries.
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_allocator_interface.h"
+#include "sanitizer_common.h"
+#include "sanitizer_flags.h"
+#include "sanitizer_procmaps.h"
+
+
+namespace __sanitizer {
+
+static void (*SoftRssLimitExceededCallback)(bool exceeded);
+void SetSoftRssLimitExceededCallback(void (*Callback)(bool exceeded)) {
+  CHECK_EQ(SoftRssLimitExceededCallback, nullptr);
+  SoftRssLimitExceededCallback = Callback;
+}
+
+#if (SANITIZER_LINUX || SANITIZER_NETBSD) && !SANITIZER_GO
+// Weak default implementation for when sanitizer_stackdepot is not linked in.
+SANITIZER_WEAK_ATTRIBUTE StackDepotStats *StackDepotGetStats() {
+  return nullptr;
+}
+
+void BackgroundThread(void *arg) {
+  const uptr hard_rss_limit_mb = common_flags()->hard_rss_limit_mb;
+  const uptr soft_rss_limit_mb = common_flags()->soft_rss_limit_mb;
+  const bool heap_profile = common_flags()->heap_profile;
+  uptr prev_reported_rss = 0;
+  uptr prev_reported_stack_depot_size = 0;
+  bool reached_soft_rss_limit = false;
+  uptr rss_during_last_reported_profile = 0;
+  while (true) {
+    SleepForMillis(100);
+    const uptr current_rss_mb = GetRSS() >> 20;
+    if (Verbosity()) {
+      // If RSS has grown 10% since last time, print some information.
+      if (prev_reported_rss * 11 / 10 < current_rss_mb) {
+        Printf("%s: RSS: %zdMb\n", SanitizerToolName, current_rss_mb);
+        prev_reported_rss = current_rss_mb;
+      }
+      // If stack depot has grown 10% since last time, print it too.
+      StackDepotStats *stack_depot_stats = StackDepotGetStats();
+      if (stack_depot_stats) {
+        if (prev_reported_stack_depot_size * 11 / 10 <
+            stack_depot_stats->allocated) {
+          Printf("%s: StackDepot: %zd ids; %zdM allocated\n",
+                 SanitizerToolName,
+                 stack_depot_stats->n_uniq_ids,
+                 stack_depot_stats->allocated >> 20);
+          prev_reported_stack_depot_size = stack_depot_stats->allocated;
+        }
+      }
+    }
+    // Check RSS against the limit.
+    if (hard_rss_limit_mb && hard_rss_limit_mb < current_rss_mb) {
+      Report("%s: hard rss limit exhausted (%zdMb vs %zdMb)\n",
+             SanitizerToolName, hard_rss_limit_mb, current_rss_mb);
+      DumpProcessMap();
+      Die();
+    }
+    if (soft_rss_limit_mb) {
+      if (soft_rss_limit_mb < current_rss_mb && !reached_soft_rss_limit) {
+        reached_soft_rss_limit = true;
+        Report("%s: soft rss limit exhausted (%zdMb vs %zdMb)\n",
+               SanitizerToolName, soft_rss_limit_mb, current_rss_mb);
+        if (SoftRssLimitExceededCallback)
+          SoftRssLimitExceededCallback(true);
+      } else if (soft_rss_limit_mb >= current_rss_mb &&
+                 reached_soft_rss_limit) {
+        reached_soft_rss_limit = false;
+        if (SoftRssLimitExceededCallback)
+          SoftRssLimitExceededCallback(false);
+      }
+    }
+    if (heap_profile &&
+        current_rss_mb > rss_during_last_reported_profile * 1.1) {
+      Printf("\n\nHEAP PROFILE at RSS %zdMb\n", current_rss_mb);
+      __sanitizer_print_memory_profile(90, 20);
+      rss_during_last_reported_profile = current_rss_mb;
+    }
+  }
+}
+#endif
+
+void WriteToSyslog(const char *msg) {
+  InternalScopedString msg_copy(kErrorMessageBufferSize);
+  msg_copy.append("%s", msg);
+  char *p = msg_copy.data();
+  char *q;
+
+  // Print one line at a time.
+  // syslog, at least on Android, has an implicit message length limit.
+  while ((q = internal_strchr(p, '\n'))) {
+    *q = '\0';
+    WriteOneLineToSyslog(p);
+    p = q + 1;
+  }
+  // Print remaining characters, if there are any.
+  // Note that this will add an extra newline at the end.
+  // FIXME: buffer extra output. This would need a thread-local buffer, which
+  // on Android requires plugging into the tools (ex. ASan's) Thread class.
+  if (*p)
+    WriteOneLineToSyslog(p);
+}
+
+void MaybeStartBackgroudThread() {
+#if (SANITIZER_LINUX || SANITIZER_NETBSD) && \
+    !SANITIZER_GO  // Need to implement/test on other platforms.
+  // Start the background thread if one of the rss limits is given.
+  if (!common_flags()->hard_rss_limit_mb &&
+      !common_flags()->soft_rss_limit_mb &&
+      !common_flags()->heap_profile) return;
+  if (!&real_pthread_create) return;  // Can't spawn the thread anyway.
+  internal_start_thread(BackgroundThread, nullptr);
+#endif
+}
+
+static void (*sandboxing_callback)();
+void SetSandboxingCallback(void (*f)()) {
+  sandboxing_callback = f;
+}
+
+}  // namespace __sanitizer
+
+SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_sandbox_on_notify,
+                             __sanitizer_sandbox_arguments *args) {
+  __sanitizer::PlatformPrepareForSandboxing(args);
+  if (__sanitizer::sandboxing_callback)
+    __sanitizer::sandboxing_callback();
+}