lldb_private::ProcessRunLock Class Reference

Read/write lock around the process running/stopped state. More...

#include "lldb/Host/ProcessRunLock.h"

Classes
class	ProcessRunLocker
	RAII helper around the read-lock side of ProcessRunLock. More...

Public Member Functions
	ProcessRunLock ()
	~ProcessRunLock ()
bool	SetRunning ()
	Set the process to running.
bool	SetStopped ()
	Set the process to stopped.

Protected Attributes
lldb::rwlock_t	m_rwlock
bool	m_running = false

Private Member Functions
	ProcessRunLock (const ProcessRunLock &)=delete
const ProcessRunLock &	operator= (const ProcessRunLock &)=delete
bool	ReadTryLock ()
bool	ReadUnlock ()

Private Attributes
std::mutex	m_recursion_mutex
llvm::DenseMap< uint64_t, uint32_t >	m_recursion

Friends
class	ProcessRunLocker

Detailed Description

Read/write lock around the process running/stopped state.

POSIX rwlocks aren't reader-recursive: a thread holding the read lock can deadlock against a pending writer if it re-acquires directly. ProcessRunLocker tracks a per-thread recursion count so re-entry skips the rwlock; the raw primitives are private.

Definition at line 33 of file ProcessRunLock.h.

Constructor & Destructor Documentation

ProcessRunLock() [1/2]

ProcessRunLock::ProcessRunLock

(

)

Definition at line 21 of file common/ProcessRunLock.cpp.

References m_rwlock.

Referenced by operator=(), ProcessRunLock(), and lldb_private::ProcessRunLock::ProcessRunLocker::TryLock().

~ProcessRunLock()

ProcessRunLock::~ProcessRunLock

(

)

Definition at line 26 of file common/ProcessRunLock.cpp.

References m_rwlock.

ProcessRunLock() [2/2]

lldb_private::ProcessRunLock::ProcessRunLock ( const ProcessRunLock & )

privatedelete

References ProcessRunLock().

Member Function Documentation

operator=()

const ProcessRunLock & lldb_private::ProcessRunLock::operator= ( const ProcessRunLock & )

privatedelete

References ProcessRunLock().

ReadTryLock()

bool ProcessRunLock::ReadTryLock ( )

private

Definition at line 31 of file common/ProcessRunLock.cpp.

References m_running, and m_rwlock.

Referenced by lldb_private::ProcessRunLock::ProcessRunLocker::TryLock().

ReadUnlock()

bool ProcessRunLock::ReadUnlock ( )

private

Definition at line 41 of file common/ProcessRunLock.cpp.

References m_rwlock.

SetRunning()

bool ProcessRunLock::SetRunning

(

)

Set the process to running.

Returns true if the process was stopped. Return false if the process was running.

Definition at line 45 of file common/ProcessRunLock.cpp.

References m_running, and m_rwlock.

SetStopped()

bool ProcessRunLock::SetStopped

(

)

Set the process to stopped.

Returns true if the process was running. Returns false if the process was stopped.

Definition at line 53 of file common/ProcessRunLock.cpp.

References m_running, and m_rwlock.

Friends And Related Symbol Documentation

ProcessRunLocker

friend class ProcessRunLocker

friend

Definition at line 88 of file ProcessRunLock.h.

Referenced by lldb_private::StoppedExecutionContext::AllowResume().

Member Data Documentation

m_recursion

llvm::DenseMap<uint64_t, uint32_t> lldb_private::ProcessRunLock::m_recursion

private

Definition at line 91 of file ProcessRunLock.h.

Referenced by lldb_private::ProcessRunLock::ProcessRunLocker::TryLock().

m_recursion_mutex

std::mutex lldb_private::ProcessRunLock::m_recursion_mutex

private

Definition at line 90 of file ProcessRunLock.h.

Referenced by lldb_private::ProcessRunLock::ProcessRunLocker::TryLock().

m_running

bool lldb_private::ProcessRunLock::m_running = false

protected

Definition at line 80 of file ProcessRunLock.h.

Referenced by ReadTryLock(), SetRunning(), and SetStopped().

m_rwlock

lldb::rwlock_t lldb_private::ProcessRunLock::m_rwlock

protected

Definition at line 79 of file ProcessRunLock.h.

Referenced by ProcessRunLock(), ReadTryLock(), ReadUnlock(), SetRunning(), SetStopped(), and ~ProcessRunLock().

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The documentation for this class was generated from the following files:

• ProcessRunLock.h
• common/ProcessRunLock.cpp
• windows/ProcessRunLock.cpp