mirror of
https://github.com/roytam1/UXP.git
synced 2026-06-22 08:19:44 +00:00
Remove SPS profiler.
- Conditionals and code blocks. (MOZ_ENABLE_PROFILER_SPS) - Stub out several profiler-only functions.
This commit is contained in:
wolfbeast
@@ -9,9 +9,6 @@
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#include "nsJSPrincipals.h"
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#include "nsScriptSecurityManager.h"
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#include "jsfriendapi.h"
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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#include "shared-libraries.h"
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#endif
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#include "mozilla/Assertions.h"
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#include "mozilla/Attributes.h"
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@@ -62,17 +59,6 @@
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#endif
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#endif
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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#if defined(MOZ_THREADSTACKHELPER_X86) || \
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defined(MOZ_THREADSTACKHELPER_X64) || \
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defined(MOZ_THREADSTACKHELPER_ARM)
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// On these architectures, the stack grows downwards (toward lower addresses).
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#define MOZ_THREADSTACKHELPER_STACK_GROWS_DOWN
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#else
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#error "Unsupported architecture"
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#endif
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#endif // MOZ_THREADSTACKHELPER_NATIVE
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namespace mozilla {
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void
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@@ -114,14 +100,6 @@ ThreadStackHelper::Shutdown()
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ThreadStackHelper::ThreadStackHelper()
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: mStackToFill(nullptr)
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#ifdef MOZ_THREADSTACKHELPER_PSEUDO
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, mPseudoStack(mozilla_get_pseudo_stack())
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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, mContextToFill(nullptr)
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#endif
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, mMaxStackSize(Stack::sMaxInlineStorage)
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, mMaxBufferSize(512)
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#endif
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{
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#if defined(XP_LINUX)
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MOZ_ALWAYS_TRUE(!::sem_init(&mSem, 0, 0));
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@@ -131,18 +109,11 @@ ThreadStackHelper::ThreadStackHelper()
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::GetCurrentProcess(), ::GetCurrentThread(),
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::GetCurrentProcess(), &mThreadID,
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THREAD_SUSPEND_RESUME
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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| THREAD_GET_CONTEXT | THREAD_QUERY_INFORMATION
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#endif
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, FALSE, 0);
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MOZ_ASSERT(mInitialized);
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#elif defined(XP_MACOSX)
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mThreadID = mach_thread_self();
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#endif
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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GetThreadStackBase();
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#endif
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}
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ThreadStackHelper::~ThreadStackHelper()
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@@ -156,45 +127,6 @@ ThreadStackHelper::~ThreadStackHelper()
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#endif
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}
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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void ThreadStackHelper::GetThreadStackBase()
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{
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mThreadStackBase = 0;
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#if defined(XP_LINUX)
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void* stackAddr;
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size_t stackSize;
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::pthread_t pthr = ::pthread_self();
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::pthread_attr_t pthr_attr;
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NS_ENSURE_TRUE_VOID(!::pthread_getattr_np(pthr, &pthr_attr));
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if (!::pthread_attr_getstack(&pthr_attr, &stackAddr, &stackSize)) {
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#ifdef MOZ_THREADSTACKHELPER_STACK_GROWS_DOWN
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mThreadStackBase = intptr_t(stackAddr) + stackSize;
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#else
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mThreadStackBase = intptr_t(stackAddr);
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#endif
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}
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MOZ_ALWAYS_TRUE(!::pthread_attr_destroy(&pthr_attr));
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#elif defined(XP_WIN)
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::MEMORY_BASIC_INFORMATION meminfo = {};
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NS_ENSURE_TRUE_VOID(::VirtualQuery(&meminfo, &meminfo, sizeof(meminfo)));
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#ifdef MOZ_THREADSTACKHELPER_STACK_GROWS_DOWN
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mThreadStackBase = intptr_t(meminfo.BaseAddress) + meminfo.RegionSize;
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#else
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mThreadStackBase = intptr_t(meminfo.AllocationBase);
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#endif
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#elif defined(XP_MACOSX)
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::pthread_t pthr = ::pthread_self();
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mThreadStackBase = intptr_t(::pthread_get_stackaddr_np(pthr));
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#else
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#error "Unsupported platform"
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#endif // platform
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}
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#endif // MOZ_THREADSTACKHELPER_NATIVE
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namespace {
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template<typename T>
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class ScopedSetPtr
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@@ -281,53 +213,10 @@ ThreadStackHelper::GetStack(Stack& aStack)
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#endif
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}
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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class ThreadStackHelper::ThreadContext final
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{
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public:
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// TODO: provide per-platform definition of Context.
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typedef struct {} Context;
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// Limit copied stack to 4kB
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static const size_t kMaxStackSize = 0x1000;
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// Limit unwound stack to 32 frames
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static const unsigned int kMaxStackFrames = 32;
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// Whether this structure contains valid data
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bool mValid;
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// Processor context
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Context mContext;
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// Stack area
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UniquePtr<uint8_t[]> mStack;
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// Start of stack area
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uintptr_t mStackBase;
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// Size of stack area
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size_t mStackSize;
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// End of stack area
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const void* mStackEnd;
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ThreadContext()
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: mValid(false)
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, mStackBase(0)
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, mStackSize(0)
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, mStackEnd(nullptr) {}
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};
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#endif // MOZ_THREADSTACKHELPER_NATIVE
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void
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ThreadStackHelper::GetNativeStack(Stack& aStack)
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{
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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ThreadContext context;
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context.mStack = MakeUnique<uint8_t[]>(ThreadContext::kMaxStackSize);
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ScopedSetPtr<ThreadContext> contextPtr(mContextToFill, &context);
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// Get pseudostack first and fill the thread context.
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GetStack(aStack);
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NS_ENSURE_TRUE_VOID(context.mValid);
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// TODO: walk the saved stack frames.
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#endif // MOZ_THREADSTACKHELPER_NATIVE
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/*** STUB ***/
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}
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#ifdef XP_LINUX
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@@ -353,369 +242,20 @@ ThreadStackHelper::PrepareStackBuffer(Stack& aStack)
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{
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// Return false to skip getting the stack and return an empty stack
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aStack.clear();
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#ifdef MOZ_THREADSTACKHELPER_PSEUDO
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/* Normally, provided the profiler is enabled, it would be an error if we
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don't have a pseudostack here (the thread probably forgot to call
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profiler_register_thread). However, on B2G, profiling secondary threads
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may be disabled despite profiler being enabled. This is by-design and
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is not an error. */
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MOZ_ASSERT(mPseudoStack);
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if (!aStack.reserve(mMaxStackSize) ||
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!aStack.reserve(aStack.capacity()) || // reserve up to the capacity
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!aStack.EnsureBufferCapacity(mMaxBufferSize)) {
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return false;
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}
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return true;
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#else
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return false;
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#endif
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}
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#ifdef MOZ_THREADSTACKHELPER_PSEUDO
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namespace {
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bool
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IsChromeJSScript(JSScript* aScript)
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{
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// May be called from another thread or inside a signal handler.
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// We assume querying the script is safe but we must not manipulate it.
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nsIScriptSecurityManager* const secman =
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nsScriptSecurityManager::GetScriptSecurityManager();
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NS_ENSURE_TRUE(secman, false);
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JSPrincipals* const principals = JS_GetScriptPrincipals(aScript);
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return secman->IsSystemPrincipal(nsJSPrincipals::get(principals));
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}
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// Get the full path after the URI scheme, if the URI matches the scheme.
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// For example, GetFullPathForScheme("a://b/c/d/e", "a://") returns "b/c/d/e".
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template <size_t LEN>
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const char*
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GetFullPathForScheme(const char* filename, const char (&scheme)[LEN]) {
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// Account for the null terminator included in LEN.
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if (!strncmp(filename, scheme, LEN - 1)) {
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return filename + LEN - 1;
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}
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return nullptr;
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}
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// Get the full path after a URI component, if the URI contains the component.
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// For example, GetPathAfterComponent("a://b/c/d/e", "/c/") returns "d/e".
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template <size_t LEN>
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const char*
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GetPathAfterComponent(const char* filename, const char (&component)[LEN]) {
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const char* found = nullptr;
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const char* next = strstr(filename, component);
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while (next) {
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// Move 'found' to end of the component, after the separator '/'.
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// 'LEN - 1' accounts for the null terminator included in LEN,
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found = next + LEN - 1;
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// Resume searching before the separator '/'.
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next = strstr(found - 1, component);
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}
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return found;
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}
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} // namespace
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const char*
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ThreadStackHelper::AppendJSEntry(const volatile StackEntry* aEntry,
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intptr_t& aAvailableBufferSize,
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const char* aPrevLabel)
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{
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// May be called from another thread or inside a signal handler.
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// We assume querying the script is safe but we must not manupulate it.
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// Also we must not allocate any memory from heap.
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MOZ_ASSERT(aEntry->isJs());
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const char* label;
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JSScript* script = aEntry->script();
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if (!script) {
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label = "(profiling suppressed)";
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} else if (IsChromeJSScript(aEntry->script())) {
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const char* filename = JS_GetScriptFilename(aEntry->script());
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const unsigned lineno = JS_PCToLineNumber(aEntry->script(), aEntry->pc());
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MOZ_ASSERT(filename);
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char buffer[128]; // Enough to fit longest js file name from the tree
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// Some script names are in the form "foo -> bar -> baz".
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// Here we find the origin of these redirected scripts.
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const char* basename = GetPathAfterComponent(filename, " -> ");
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if (basename) {
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filename = basename;
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}
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basename = GetFullPathForScheme(filename, "chrome://");
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if (!basename) {
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basename = GetFullPathForScheme(filename, "resource://");
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}
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if (!basename) {
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// If the (add-on) script is located under the {profile}/extensions
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// directory, extract the path after the /extensions/ part.
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basename = GetPathAfterComponent(filename, "/extensions/");
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}
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if (!basename) {
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// Only keep the file base name for paths outside the above formats.
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basename = strrchr(filename, '/');
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basename = basename ? basename + 1 : filename;
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// Look for Windows path separator as well.
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filename = strrchr(basename, '\\');
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if (filename) {
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basename = filename + 1;
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}
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}
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size_t len = SprintfLiteral(buffer, "%s:%u", basename, lineno);
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if (len < sizeof(buffer)) {
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if (mStackToFill->IsSameAsEntry(aPrevLabel, buffer)) {
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return aPrevLabel;
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}
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// Keep track of the required buffer size
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aAvailableBufferSize -= (len + 1);
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if (aAvailableBufferSize >= 0) {
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// Buffer is big enough.
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return mStackToFill->InfallibleAppendViaBuffer(buffer, len);
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}
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// Buffer is not big enough; fall through to using static label below.
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}
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// snprintf failed or buffer is not big enough.
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label = "(chrome script)";
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} else {
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label = "(content script)";
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}
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if (mStackToFill->IsSameAsEntry(aPrevLabel, label)) {
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return aPrevLabel;
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}
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mStackToFill->infallibleAppend(label);
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return label;
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}
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#endif // MOZ_THREADSTACKHELPER_PSEUDO
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void
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ThreadStackHelper::FillStackBuffer()
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{
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MOZ_ASSERT(mStackToFill->empty());
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#ifdef MOZ_THREADSTACKHELPER_PSEUDO
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size_t reservedSize = mStackToFill->capacity();
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size_t reservedBufferSize = mStackToFill->AvailableBufferSize();
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intptr_t availableBufferSize = intptr_t(reservedBufferSize);
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// Go from front to back
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const volatile StackEntry* entry = mPseudoStack->mStack;
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const volatile StackEntry* end = entry + mPseudoStack->stackSize();
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// Deduplicate identical, consecutive frames
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const char* prevLabel = nullptr;
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for (; reservedSize-- && entry != end; entry++) {
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/* We only accept non-copy labels, including js::RunScript,
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because we only want static labels in the hang stack. */
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if (entry->isCopyLabel()) {
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continue;
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}
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if (entry->isJs()) {
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prevLabel = AppendJSEntry(entry, availableBufferSize, prevLabel);
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continue;
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}
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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if (mContextToFill) {
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mContextToFill->mStackEnd = entry->stackAddress();
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}
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#endif
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const char* const label = entry->label();
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if (mStackToFill->IsSameAsEntry(prevLabel, label)) {
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// Avoid duplicate labels to save space in the stack.
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continue;
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}
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mStackToFill->infallibleAppend(label);
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prevLabel = label;
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}
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// end != entry if we exited early due to not enough reserved frames.
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// Expand the number of reserved frames for next time.
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mMaxStackSize = mStackToFill->capacity() + (end - entry);
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// availableBufferSize < 0 if we needed a larger buffer than we reserved.
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// Calculate a new reserve size for next time.
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if (availableBufferSize < 0) {
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mMaxBufferSize = reservedBufferSize - availableBufferSize;
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}
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#endif
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/*** STUB ***/
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}
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MOZ_ASAN_BLACKLIST void
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ThreadStackHelper::FillThreadContext(void* aContext)
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{
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#ifdef MOZ_THREADSTACKHELPER_NATIVE
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if (!mContextToFill) {
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return;
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}
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#if 0 // TODO: remove dependency on Breakpad structs.
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#if defined(XP_LINUX)
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const ucontext_t& context = *reinterpret_cast<ucontext_t*>(aContext);
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#if defined(MOZ_THREADSTACKHELPER_X86)
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mContextToFill->mContext.context_flags = MD_CONTEXT_X86_FULL;
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mContextToFill->mContext.edi = context.uc_mcontext.gregs[REG_EDI];
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mContextToFill->mContext.esi = context.uc_mcontext.gregs[REG_ESI];
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mContextToFill->mContext.ebx = context.uc_mcontext.gregs[REG_EBX];
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mContextToFill->mContext.edx = context.uc_mcontext.gregs[REG_EDX];
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mContextToFill->mContext.ecx = context.uc_mcontext.gregs[REG_ECX];
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mContextToFill->mContext.eax = context.uc_mcontext.gregs[REG_EAX];
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mContextToFill->mContext.ebp = context.uc_mcontext.gregs[REG_EBP];
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mContextToFill->mContext.eip = context.uc_mcontext.gregs[REG_EIP];
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mContextToFill->mContext.eflags = context.uc_mcontext.gregs[REG_EFL];
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mContextToFill->mContext.esp = context.uc_mcontext.gregs[REG_ESP];
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#elif defined(MOZ_THREADSTACKHELPER_X64)
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mContextToFill->mContext.context_flags = MD_CONTEXT_AMD64_FULL;
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mContextToFill->mContext.eflags = uint32_t(context.uc_mcontext.gregs[REG_EFL]);
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mContextToFill->mContext.rax = context.uc_mcontext.gregs[REG_RAX];
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mContextToFill->mContext.rcx = context.uc_mcontext.gregs[REG_RCX];
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mContextToFill->mContext.rdx = context.uc_mcontext.gregs[REG_RDX];
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mContextToFill->mContext.rbx = context.uc_mcontext.gregs[REG_RBX];
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mContextToFill->mContext.rsp = context.uc_mcontext.gregs[REG_RSP];
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mContextToFill->mContext.rbp = context.uc_mcontext.gregs[REG_RBP];
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mContextToFill->mContext.rsi = context.uc_mcontext.gregs[REG_RSI];
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mContextToFill->mContext.rdi = context.uc_mcontext.gregs[REG_RDI];
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memcpy(&mContextToFill->mContext.r8,
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&context.uc_mcontext.gregs[REG_R8], 8 * sizeof(int64_t));
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mContextToFill->mContext.rip = context.uc_mcontext.gregs[REG_RIP];
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#elif defined(MOZ_THREADSTACKHELPER_ARM)
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mContextToFill->mContext.context_flags = MD_CONTEXT_ARM_FULL;
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memcpy(&mContextToFill->mContext.iregs[0],
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&context.uc_mcontext.arm_r0, 17 * sizeof(int32_t));
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#else
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#error "Unsupported architecture"
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#endif // architecture
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#elif defined(XP_WIN)
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// Breakpad context struct is based off of the Windows CONTEXT struct,
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// so we assume they are the same; do some sanity checks to make sure.
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static_assert(sizeof(ThreadContext::Context) == sizeof(::CONTEXT),
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"Context struct mismatch");
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static_assert(offsetof(ThreadContext::Context, context_flags) ==
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offsetof(::CONTEXT, ContextFlags),
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"Context struct mismatch");
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mContextToFill->mContext.context_flags = CONTEXT_FULL;
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NS_ENSURE_TRUE_VOID(::GetThreadContext(mThreadID,
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reinterpret_cast<::CONTEXT*>(&mContextToFill->mContext)));
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#elif defined(XP_MACOSX)
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#if defined(MOZ_THREADSTACKHELPER_X86)
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const thread_state_flavor_t flavor = x86_THREAD_STATE32;
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x86_thread_state32_t state = {};
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mach_msg_type_number_t count = x86_THREAD_STATE32_COUNT;
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#elif defined(MOZ_THREADSTACKHELPER_X64)
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const thread_state_flavor_t flavor = x86_THREAD_STATE64;
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x86_thread_state64_t state = {};
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mach_msg_type_number_t count = x86_THREAD_STATE64_COUNT;
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#elif defined(MOZ_THREADSTACKHELPER_ARM)
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const thread_state_flavor_t flavor = ARM_THREAD_STATE;
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arm_thread_state_t state = {};
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mach_msg_type_number_t count = ARM_THREAD_STATE_COUNT;
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#endif
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NS_ENSURE_TRUE_VOID(KERN_SUCCESS == ::thread_get_state(
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mThreadID, flavor, reinterpret_cast<thread_state_t>(&state), &count));
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#if __DARWIN_UNIX03
|
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#define GET_REGISTER(s, r) ((s).__##r)
|
||||
#else
|
||||
#define GET_REGISTER(s, r) ((s).r)
|
||||
#endif
|
||||
#if defined(MOZ_THREADSTACKHELPER_X86)
|
||||
mContextToFill->mContext.context_flags = MD_CONTEXT_X86_FULL;
|
||||
mContextToFill->mContext.edi = GET_REGISTER(state, edi);
|
||||
mContextToFill->mContext.esi = GET_REGISTER(state, esi);
|
||||
mContextToFill->mContext.ebx = GET_REGISTER(state, ebx);
|
||||
mContextToFill->mContext.edx = GET_REGISTER(state, edx);
|
||||
mContextToFill->mContext.ecx = GET_REGISTER(state, ecx);
|
||||
mContextToFill->mContext.eax = GET_REGISTER(state, eax);
|
||||
mContextToFill->mContext.ebp = GET_REGISTER(state, ebp);
|
||||
mContextToFill->mContext.eip = GET_REGISTER(state, eip);
|
||||
mContextToFill->mContext.eflags = GET_REGISTER(state, eflags);
|
||||
mContextToFill->mContext.esp = GET_REGISTER(state, esp);
|
||||
#elif defined(MOZ_THREADSTACKHELPER_X64)
|
||||
mContextToFill->mContext.context_flags = MD_CONTEXT_AMD64_FULL;
|
||||
mContextToFill->mContext.eflags = uint32_t(GET_REGISTER(state, rflags));
|
||||
mContextToFill->mContext.rax = GET_REGISTER(state, rax);
|
||||
mContextToFill->mContext.rcx = GET_REGISTER(state, rcx);
|
||||
mContextToFill->mContext.rdx = GET_REGISTER(state, rdx);
|
||||
mContextToFill->mContext.rbx = GET_REGISTER(state, rbx);
|
||||
mContextToFill->mContext.rsp = GET_REGISTER(state, rsp);
|
||||
mContextToFill->mContext.rbp = GET_REGISTER(state, rbp);
|
||||
mContextToFill->mContext.rsi = GET_REGISTER(state, rsi);
|
||||
mContextToFill->mContext.rdi = GET_REGISTER(state, rdi);
|
||||
memcpy(&mContextToFill->mContext.r8,
|
||||
&GET_REGISTER(state, r8), 8 * sizeof(int64_t));
|
||||
mContextToFill->mContext.rip = GET_REGISTER(state, rip);
|
||||
#elif defined(MOZ_THREADSTACKHELPER_ARM)
|
||||
mContextToFill->mContext.context_flags = MD_CONTEXT_ARM_FULL;
|
||||
memcpy(mContextToFill->mContext.iregs,
|
||||
GET_REGISTER(state, r), 17 * sizeof(int32_t));
|
||||
#else
|
||||
#error "Unsupported architecture"
|
||||
#endif // architecture
|
||||
#undef GET_REGISTER
|
||||
|
||||
#else
|
||||
#error "Unsupported platform"
|
||||
#endif // platform
|
||||
|
||||
intptr_t sp = 0;
|
||||
#if defined(MOZ_THREADSTACKHELPER_X86)
|
||||
sp = mContextToFill->mContext.esp;
|
||||
#elif defined(MOZ_THREADSTACKHELPER_X64)
|
||||
sp = mContextToFill->mContext.rsp;
|
||||
#elif defined(MOZ_THREADSTACKHELPER_ARM)
|
||||
sp = mContextToFill->mContext.iregs[13];
|
||||
#else
|
||||
#error "Unsupported architecture"
|
||||
#endif // architecture
|
||||
NS_ENSURE_TRUE_VOID(sp);
|
||||
NS_ENSURE_TRUE_VOID(mThreadStackBase);
|
||||
|
||||
size_t stackSize = std::min(intptr_t(ThreadContext::kMaxStackSize),
|
||||
std::abs(sp - mThreadStackBase));
|
||||
|
||||
if (mContextToFill->mStackEnd) {
|
||||
// Limit the start of stack to a certain location if specified.
|
||||
stackSize = std::min(intptr_t(stackSize),
|
||||
std::abs(sp - intptr_t(mContextToFill->mStackEnd)));
|
||||
}
|
||||
|
||||
#ifndef MOZ_THREADSTACKHELPER_STACK_GROWS_DOWN
|
||||
// If if the stack grows upwards, and we need to recalculate our
|
||||
// stack copy's base address. Subtract sizeof(void*) so that the
|
||||
// location pointed to by sp is included.
|
||||
sp -= stackSize - sizeof(void*);
|
||||
#endif
|
||||
|
||||
#ifndef MOZ_ASAN
|
||||
memcpy(mContextToFill->mStack.get(), reinterpret_cast<void*>(sp), stackSize);
|
||||
// Valgrind doesn't care about the access outside the stack frame, but
|
||||
// the presence of uninitialised values on the stack does cause it to
|
||||
// later report a lot of false errors when Breakpad comes to unwind it.
|
||||
// So mark the extracted data as defined.
|
||||
MOZ_MAKE_MEM_DEFINED(mContextToFill->mStack.get(), stackSize);
|
||||
#else
|
||||
// ASan will flag memcpy for access outside of stack frames,
|
||||
// so roll our own memcpy here.
|
||||
intptr_t* dst = reinterpret_cast<intptr_t*>(&mContextToFill->mStack[0]);
|
||||
const intptr_t* src = reinterpret_cast<intptr_t*>(sp);
|
||||
for (intptr_t len = stackSize; len > 0; len -= sizeof(*src)) {
|
||||
*(dst++) = *(src++);
|
||||
}
|
||||
#endif
|
||||
|
||||
mContextToFill->mStackBase = uintptr_t(sp);
|
||||
mContextToFill->mStackSize = stackSize;
|
||||
mContextToFill->mValid = true;
|
||||
#endif
|
||||
#endif // MOZ_THREADSTACKHELPER_NATIVE
|
||||
/*** STUB ***/
|
||||
}
|
||||
|
||||
} // namespace mozilla
|
||||
|
||||
Reference in New Issue
Block a user