Add m-esr52 at 52.6.0

1 files changed, 88 insertions, 0 deletions

diff --git a/tools/profiler/lul/platform-linux-lul.cpp b/tools/profiler/lul/platform-linux-lul.cpp
new file mode 100644
index 000000000..9541534a1
--- /dev/null
+++ b/tools/profiler/lul/platform-linux-lul.cpp
@@ -0,0 +1,88 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+#include <signal.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "platform.h"
+#include "PlatformMacros.h"
+#include "LulMain.h"
+#include "shared-libraries.h"
+#include "AutoObjectMapper.h"
+
+// Contains miscellaneous helpers that are used to connect SPS and LUL.
+
+
+// Find out, in a platform-dependent way, where the code modules got
+// mapped in the process' virtual address space, and get |aLUL| to
+// load unwind info for them.
+void
+read_procmaps(lul::LUL* aLUL)
+{
+  MOZ_ASSERT(aLUL->CountMappings() == 0);
+
+# if defined(SPS_OS_linux) || defined(SPS_OS_android) || defined(SPS_OS_darwin)
+  SharedLibraryInfo info = SharedLibraryInfo::GetInfoForSelf();
+
+  for (size_t i = 0; i < info.GetSize(); i++) {
+    const SharedLibrary& lib = info.GetEntry(i);
+
+#   if defined(SPS_OS_android) && !defined(MOZ_WIDGET_GONK)
+    // We're using faulty.lib.  Use a special-case object mapper.
+    AutoObjectMapperFaultyLib mapper(aLUL->mLog);
+#   else
+    // We can use the standard POSIX-based mapper.
+    AutoObjectMapperPOSIX mapper(aLUL->mLog);
+#   endif
+
+    // Ask |mapper| to map the object.  Then hand its mapped address
+    // to NotifyAfterMap().
+    void*  image = nullptr;
+    size_t size  = 0;
+    bool ok = mapper.Map(&image, &size, lib.GetName());
+    if (ok && image && size > 0) {
+      aLUL->NotifyAfterMap(lib.GetStart(), lib.GetEnd()-lib.GetStart(),
+                           lib.GetName().c_str(), image);
+    } else if (!ok && lib.GetName() == "") {
+      // The object has no name and (as a consequence) the mapper
+      // failed to map it.  This happens on Linux, where
+      // GetInfoForSelf() produces two such mappings: one for the
+      // executable and one for the VDSO.  The executable one isn't a
+      // big deal since there's not much interesting code in there,
+      // but the VDSO one is a problem on x86-{linux,android} because
+      // lack of knowledge about the mapped area inhibits LUL's
+      // special __kernel_syscall handling.  Hence notify |aLUL| at
+      // least of the mapping, even though it can't read any unwind
+      // information for the area.
+      aLUL->NotifyExecutableArea(lib.GetStart(), lib.GetEnd()-lib.GetStart());
+    }
+
+    // |mapper| goes out of scope at this point and so its destructor
+    // unmaps the object.
+  }
+
+# else
+#  error "Unknown platform"
+# endif
+}
+
+
+// LUL needs a callback for its logging sink.
+void
+logging_sink_for_LUL(const char* str) {
+  // Ignore any trailing \n, since LOG will add one anyway.
+  size_t n = strlen(str);
+  if (n > 0 && str[n-1] == '\n') {
+    char* tmp = strdup(str);
+    tmp[n-1] = 0;
+    LOG(tmp);
+    free(tmp);
+  } else {
+    LOG(str);
+  }
+}