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//===-- MachProcess.h -------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Created by Greg Clayton on 6/15/07.
//
//===----------------------------------------------------------------------===//
#ifndef __MachProcess_h__
#define __MachProcess_h__
#include "DNBDefs.h"
#include "DNBBreakpoint.h"
#include "DNBError.h"
//#include "MachDYLD.h"
#include "MachException.h"
#include "MachVMMemory.h"
#include "MachTask.h"
#include "MachThreadList.h"
#include "PThreadCondition.h"
#include "PThreadEvent.h"
#include "PThreadMutex.h"
#include <mach/mach.h>
#include <sys/signal.h>
#include <pthread.h>
#include <vector>
class DNBThreadResumeActions;
class MachProcess
{
public:
//----------------------------------------------------------------------
// Constructors and Destructors
//----------------------------------------------------------------------
MachProcess ();
~MachProcess ();
//----------------------------------------------------------------------
// Child process control
//----------------------------------------------------------------------
pid_t AttachForDebug (pid_t pid, char *err_str, size_t err_len);
pid_t LaunchForDebug (const char *path, char const *argv[], char const *envp[], const char *stdio_path, nub_launch_flavor_t launch_flavor, DNBError &err);
static pid_t ForkChildForPTraceDebugging (const char *path, char const *argv[], char const *envp[], MachProcess* process, DNBError &err);
static pid_t PosixSpawnChildForPTraceDebugging (const char *path, char const *argv[], char const *envp[], const char *stdio_path, MachProcess* process, DNBError& err);
nub_addr_t GetDYLDAllImageInfosAddress ();
static const void * PrepareForAttach (const char *path, nub_launch_flavor_t launch_flavor, bool waitfor, DNBError &err_str);
static void CleanupAfterAttach (const void *attach_token, bool success, DNBError &err_str);
static nub_process_t CheckForProcess (const void *attach_token);
#if defined (__arm__)
pid_t SBLaunchForDebug (const char *app_bundle_path, char const *argv[], char const *envp[], DNBError &launch_err);
static pid_t SBForkChildForPTraceDebugging (const char *path, char const *argv[], char const *envp[], MachProcess* process, DNBError &launch_err);
#endif
nub_addr_t LookupSymbol (const char *name, const char *shlib);
void SetNameToAddressCallback (DNBCallbackNameToAddress callback, void *baton)
{
m_name_to_addr_callback = callback;
m_name_to_addr_baton = baton;
}
void SetSharedLibraryInfoCallback (DNBCallbackCopyExecutableImageInfos callback, void *baton)
{
m_image_infos_callback = callback;
m_image_infos_baton = baton;
}
bool Resume (const DNBThreadResumeActions& thread_actions);
bool Signal (int signal, const struct timespec *timeout_abstime = NULL);
bool Kill (const struct timespec *timeout_abstime = NULL);
bool Detach ();
nub_size_t ReadMemory (nub_addr_t addr, nub_size_t size, void *buf);
nub_size_t WriteMemory (nub_addr_t addr, nub_size_t size, const void *buf);
//----------------------------------------------------------------------
// Path and arg accessors
//----------------------------------------------------------------------
const char * Path () const { return m_path.c_str(); }
size_t ArgumentCount () const { return m_args.size(); }
const char * ArgumentAtIndex (size_t arg_idx) const
{
if (arg_idx < m_args.size())
return m_args[arg_idx].c_str();
return NULL;
}
//----------------------------------------------------------------------
// Breakpoint functions
//----------------------------------------------------------------------
nub_break_t CreateBreakpoint (nub_addr_t addr, nub_size_t length, bool hardware, thread_t thread);
bool DisableBreakpoint (nub_break_t breakID, bool remove);
nub_size_t DisableAllBreakpoints (bool remove);
bool EnableBreakpoint (nub_break_t breakID);
void DumpBreakpoint(nub_break_t breakID) const;
DNBBreakpointList& Breakpoints() { return m_breakpoints; }
const DNBBreakpointList& Breakpoints() const { return m_breakpoints; }
//----------------------------------------------------------------------
// Watchpoint functions
//----------------------------------------------------------------------
nub_watch_t CreateWatchpoint (nub_addr_t addr, nub_size_t length, uint32_t watch_type, bool hardware, thread_t thread);
bool DisableWatchpoint (nub_watch_t watchID, bool remove);
nub_size_t DisableAllWatchpoints (bool remove);
bool EnableWatchpoint (nub_watch_t watchID);
void DumpWatchpoint(nub_watch_t watchID) const;
DNBBreakpointList& Watchpoints() { return m_watchpoints; }
const DNBBreakpointList& Watchpoints() const { return m_watchpoints; }
//----------------------------------------------------------------------
// Exception thread functions
//----------------------------------------------------------------------
bool StartSTDIOThread ();
static void * STDIOThread (void *arg);
void ExceptionMessageReceived (const MachException::Message& exceptionMessage);
void ExceptionMessageBundleComplete ();
void SharedLibrariesUpdated ();
nub_size_t CopyImageInfos (struct DNBExecutableImageInfo **image_infos, bool only_changed);
//----------------------------------------------------------------------
// Accessors
//----------------------------------------------------------------------
pid_t ProcessID () const { return m_pid; }
bool ProcessIDIsValid () const { return m_pid > 0; }
pid_t SetProcessID (pid_t pid);
MachTask& Task() { return m_task; }
const MachTask& Task() const { return m_task; }
PThreadEvent& Events() { return m_events; }
const DNBRegisterSetInfo *
GetRegisterSetInfo (nub_thread_t tid, nub_size_t *num_reg_sets) const;
bool GetRegisterValue (nub_thread_t tid, uint32_t set, uint32_t reg, DNBRegisterValue *reg_value) const;
bool SetRegisterValue (nub_thread_t tid, uint32_t set, uint32_t reg, const DNBRegisterValue *value) const;
const char * ThreadGetName (nub_thread_t tid);
nub_state_t ThreadGetState (nub_thread_t tid);
nub_size_t GetNumThreads () const;
nub_thread_t GetThreadAtIndex (nub_size_t thread_idx) const;
uint32_t GetThreadIndexFromThreadID (nub_thread_t tid);
nub_thread_t GetCurrentThread ();
nub_thread_t SetCurrentThread (nub_thread_t tid);
MachThreadList & GetThreadList() { return m_threadList; }
bool GetThreadStoppedReason(nub_thread_t tid, struct DNBThreadStopInfo *stop_info) const;
void DumpThreadStoppedReason(nub_thread_t tid) const;
const char * GetThreadInfo (nub_thread_t tid) const;
nub_state_t GetState ();
void SetState (nub_state_t state);
bool IsRunning (nub_state_t state)
{
return state == eStateRunning || IsStepping(state);
}
bool IsStepping (nub_state_t state)
{
return state == eStateStepping;
}
bool CanResume (nub_state_t state)
{
return state == eStateStopped;
}
const DNBError& GetLastError () const { return m_err; }
bool GetExitStatus(int* status)
{
if (GetState() == eStateExited)
{
if (status)
*status = m_exit_status;
return true;
}
return false;
}
void SetExitStatus(int status)
{
m_exit_status = status;
SetState(eStateExited);
}
uint32_t StopCount() const { return m_stop_count; }
void SetChildFileDescriptors (int stdin_fileno, int stdout_fileno, int stderr_fileno)
{
m_child_stdin = stdin_fileno;
m_child_stdout = stdout_fileno;
m_child_stderr = stderr_fileno;
}
int GetStdinFileDescriptor () const { return m_child_stdin; }
int GetStdoutFileDescriptor () const { return m_child_stdout; }
int GetStderrFileDescriptor () const { return m_child_stderr; }
void AppendSTDOUT (char* s, size_t len);
size_t GetAvailableSTDOUT (char *buf, size_t buf_size);
size_t GetAvailableSTDERR (char *buf, size_t buf_size);
void CloseChildFileDescriptors ()
{
if (m_child_stdin >= 0)
{
::close (m_child_stdin);
m_child_stdin = -1;
}
if (m_child_stdout >= 0)
{
::close (m_child_stdout);
m_child_stdout = -1;
}
if (m_child_stderr >= 0)
{
::close (m_child_stderr);
m_child_stderr = -1;
}
}
bool ProcessUsingSpringBoard() const { return (m_flags & eMachProcessFlagsUsingSBS) != 0; }
private:
enum
{
eMachProcessFlagsNone = 0,
eMachProcessFlagsAttached = (1 << 0),
eMachProcessFlagsUsingSBS = (1 << 1)
};
void Clear ();
void ReplyToAllExceptions (const DNBThreadResumeActions& thread_actions);
void PrivateResume (const DNBThreadResumeActions& thread_actions);
nub_size_t RemoveTrapsFromBuffer (nub_addr_t addr, nub_size_t size, uint8_t *buf) const;
uint32_t Flags () const { return m_flags; }
nub_state_t DoSIGSTOP (bool clear_bps_and_wps);
pid_t m_pid; // Process ID of child process
int m_child_stdin;
int m_child_stdout;
int m_child_stderr;
std::string m_path; // A path to the executable if we have one
std::vector<std::string> m_args; // The arguments with which the process was lauched
int m_exit_status; // The exit status for the process
MachTask m_task; // The mach task for this process
uint32_t m_flags; // Process specific flags (see eMachProcessFlags enums)
uint32_t m_stop_count; // A count of many times have we stopped
pthread_t m_stdio_thread; // Thread ID for the thread that watches for child process stdio
PThreadMutex m_stdio_mutex; // Multithreaded protection for stdio
std::string m_stdout_data;
MachException::Message::collection
m_exception_messages; // A collection of exception messages caught when listening to the exception port
PThreadMutex m_exception_messages_mutex; // Multithreaded protection for m_exception_messages
MachThreadList m_threadList; // A list of threads that is maintained/updated after each stop
DNBError m_err; // The last error for any transaction
nub_state_t m_state; // The state of our process
PThreadMutex m_state_mutex; // Multithreaded protection for m_state
PThreadEvent m_events; // Process related events in the child processes lifetime can be waited upon
DNBBreakpointList m_breakpoints; // Breakpoint list for this process
DNBBreakpointList m_watchpoints; // Watchpoint list for this process
DNBCallbackNameToAddress m_name_to_addr_callback;
void * m_name_to_addr_baton;
DNBCallbackCopyExecutableImageInfos
m_image_infos_callback;
void * m_image_infos_baton;
};
#endif // __MachProcess_h__
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