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authorwolfbeast <mcwerewolf@gmail.com>2018-05-24 14:06:04 +0200
committerwolfbeast <mcwerewolf@gmail.com>2018-05-24 14:06:04 +0200
commitac25827a87d86f1cf9e48aab6605f77a2c89041a (patch)
treec3533a008e606f4f6393e838b4305cf6d07f47d2 /tools/profiler/lul/AutoObjectMapper.cpp
parentc8b38a18031f6ae0fca8b2bef73daa86f6f96ae8 (diff)
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Remove SPS profiler.
- Conditionals and code blocks. (MOZ_ENABLE_PROFILER_SPS) - Stub out several profiler-only functions.
Diffstat (limited to 'tools/profiler/lul/AutoObjectMapper.cpp')
-rw-r--r--tools/profiler/lul/AutoObjectMapper.cpp207
1 files changed, 0 insertions, 207 deletions
diff --git a/tools/profiler/lul/AutoObjectMapper.cpp b/tools/profiler/lul/AutoObjectMapper.cpp
deleted file mode 100644
index 1bc5ce62a..000000000
--- a/tools/profiler/lul/AutoObjectMapper.cpp
+++ /dev/null
@@ -1,207 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* 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 <sys/mman.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-#include "mozilla/Assertions.h"
-#include "mozilla/Sprintf.h"
-
-#include "PlatformMacros.h"
-#include "AutoObjectMapper.h"
-
-#if defined(SPS_OS_android)
-# include <dlfcn.h>
-# include "mozilla/Types.h"
- // FIXME move these out of mozglue/linker/ElfLoader.h into their
- // own header, so as to avoid conflicts arising from two definitions
- // of Array
- extern "C" {
- MFBT_API size_t
- __dl_get_mappable_length(void *handle);
- MFBT_API void *
- __dl_mmap(void *handle, void *addr, size_t length, off_t offset);
- MFBT_API void
- __dl_munmap(void *handle, void *addr, size_t length);
- }
- // The following are for get_installation_lib_dir()
-# include "nsString.h"
-# include "nsDirectoryServiceUtils.h"
-# include "nsDirectoryServiceDefs.h"
-#endif
-
-
-// A helper function for creating failure error messages in
-// AutoObjectMapper*::Map.
-static void
-failedToMessage(void(*aLog)(const char*),
- const char* aHowFailed, std::string aFileName)
-{
- char buf[300];
- SprintfLiteral(buf, "AutoObjectMapper::Map: Failed to %s \'%s\'",
- aHowFailed, aFileName.c_str());
- buf[sizeof(buf)-1] = 0;
- aLog(buf);
-}
-
-
-AutoObjectMapperPOSIX::AutoObjectMapperPOSIX(void(*aLog)(const char*))
- : mImage(nullptr)
- , mSize(0)
- , mLog(aLog)
- , mIsMapped(false)
-{}
-
-AutoObjectMapperPOSIX::~AutoObjectMapperPOSIX() {
- if (!mIsMapped) {
- // There's nothing to do.
- MOZ_ASSERT(!mImage);
- MOZ_ASSERT(mSize == 0);
- return;
- }
- MOZ_ASSERT(mSize > 0);
- // The following assertion doesn't necessarily have to be true,
- // but we assume (reasonably enough) that no mmap facility would
- // be crazy enough to map anything at page zero.
- MOZ_ASSERT(mImage);
- munmap(mImage, mSize);
-}
-
-bool AutoObjectMapperPOSIX::Map(/*OUT*/void** start, /*OUT*/size_t* length,
- std::string fileName)
-{
- MOZ_ASSERT(!mIsMapped);
-
- int fd = open(fileName.c_str(), O_RDONLY);
- if (fd == -1) {
- failedToMessage(mLog, "open", fileName);
- return false;
- }
-
- struct stat st;
- int err = fstat(fd, &st);
- size_t sz = (err == 0) ? st.st_size : 0;
- if (err != 0 || sz == 0) {
- failedToMessage(mLog, "fstat", fileName);
- close(fd);
- return false;
- }
-
- void* image = mmap(nullptr, sz, PROT_READ, MAP_SHARED, fd, 0);
- if (image == MAP_FAILED) {
- failedToMessage(mLog, "mmap", fileName);
- close(fd);
- return false;
- }
-
- close(fd);
- mIsMapped = true;
- mImage = *start = image;
- mSize = *length = sz;
- return true;
-}
-
-
-#if defined(SPS_OS_android)
-// A helper function for AutoObjectMapperFaultyLib::Map. Finds out
-// where the installation's lib directory is, since we'll have to look
-// in there to get hold of libmozglue.so. Returned C string is heap
-// allocated and the caller must deallocate it.
-static char*
-get_installation_lib_dir()
-{
- nsCOMPtr<nsIProperties>
- directoryService(do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID));
- if (!directoryService) {
- return nullptr;
- }
- nsCOMPtr<nsIFile> greDir;
- nsresult rv = directoryService->Get(NS_GRE_DIR, NS_GET_IID(nsIFile),
- getter_AddRefs(greDir));
- if (NS_FAILED(rv)) return nullptr;
- nsCString path;
- rv = greDir->GetNativePath(path);
- if (NS_FAILED(rv)) {
- return nullptr;
- }
- return strdup(path.get());
-}
-
-AutoObjectMapperFaultyLib::AutoObjectMapperFaultyLib(void(*aLog)(const char*))
- : AutoObjectMapperPOSIX(aLog)
- , mHdl(nullptr)
-{}
-
-AutoObjectMapperFaultyLib::~AutoObjectMapperFaultyLib() {
- if (mHdl) {
- // We've got an object mapped by faulty.lib. Unmap it via faulty.lib.
- MOZ_ASSERT(mSize > 0);
- // Assert on the basis that no valid mapping would start at page zero.
- MOZ_ASSERT(mImage);
- __dl_munmap(mHdl, mImage, mSize);
- dlclose(mHdl);
- // Stop assertions in ~AutoObjectMapperPOSIX from failing.
- mImage = nullptr;
- mSize = 0;
- }
- // At this point the parent class destructor, ~AutoObjectMapperPOSIX,
- // gets called. If that has something mapped in the normal way, it
- // will unmap it in the normal way. Unfortunately there's no
- // obvious way to enforce the requirement that the object is mapped
- // either by faulty.lib or by the parent class, but not by both.
-}
-
-bool AutoObjectMapperFaultyLib::Map(/*OUT*/void** start, /*OUT*/size_t* length,
- std::string fileName)
-{
- MOZ_ASSERT(!mHdl);
-
- if (fileName == "libmozglue.so") {
-
- // Do (2) in the comment above.
- char* libdir = get_installation_lib_dir();
- if (libdir) {
- fileName = std::string(libdir) + "/lib/" + fileName;
- free(libdir);
- }
- // Hand the problem off to the standard mapper.
- return AutoObjectMapperPOSIX::Map(start, length, fileName);
-
- } else {
-
- // Do cases (1) and (3) in the comment above. We have to
- // grapple with faulty.lib directly.
- void* hdl = dlopen(fileName.c_str(), RTLD_GLOBAL | RTLD_LAZY);
- if (!hdl) {
- failedToMessage(mLog, "get handle for ELF file", fileName);
- return false;
- }
-
- size_t sz = __dl_get_mappable_length(hdl);
- if (sz == 0) {
- dlclose(hdl);
- failedToMessage(mLog, "get size for ELF file", fileName);
- return false;
- }
-
- void* image = __dl_mmap(hdl, nullptr, sz, 0);
- if (image == MAP_FAILED) {
- dlclose(hdl);
- failedToMessage(mLog, "mmap ELF file", fileName);
- return false;
- }
-
- mHdl = hdl;
- mImage = *start = image;
- mSize = *length = sz;
- return true;
- }
-}
-
-#endif // defined(SPS_OS_android)