/* -*- mode: C; c-basic-offset: 3; indent-tabs-mode: nil; -*- */
/*
This file is part of drd, a thread error detector.
Copyright (C) 2006-2011 Bart Van Assche <bvanassche@acm.org>.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
*/
#ifndef __THREAD_H
#define __THREAD_H
/* Include directives. */
#include "drd_basics.h"
#include "drd_segment.h"
#include "pub_drd_bitmap.h"
#include "pub_tool_libcassert.h" /* tl_assert() */
#include "pub_tool_stacktrace.h" /* typedef StackTrace */
#include "pub_tool_threadstate.h" /* VG_N_THREADS */
/* Defines. */
/** Maximum number of threads DRD keeps information about. */
#define DRD_N_THREADS VG_N_THREADS
/** A number different from any valid DRD thread ID. */
#define DRD_INVALID_THREADID 0
/**
* A number different from any valid POSIX thread ID.
*
* @note The PThreadId typedef and the INVALID_POSIX_THREADID depend on the
* operating system and threading library in use. PThreadId must contain at
* least as many bits as pthread_t, and INVALID_POSIX_THREADID
* must be a value that will never be returned by pthread_self().
*/
#define INVALID_POSIX_THREADID ((PThreadId)0)
/* Type definitions. */
/**
* POSIX thread ID. The type PThreadId must be at least as wide as
* pthread_t.
*/
typedef UWord PThreadId;
/** Per-thread information managed by DRD. */
typedef struct
{
Segment* first; /**< Pointer to first segment. */
Segment* last; /**< Pointer to last segment. */
ThreadId vg_threadid; /**< Valgrind thread ID. */
PThreadId pt_threadid; /**< POSIX thread ID. */
Addr stack_min_min; /**< Lowest value stack pointer ever had. */
Addr stack_min; /**< Current stack pointer. */
Addr stack_startup; /**<Stack pointer after pthread_create() finished.*/
Addr stack_max; /**< Top of stack. */
SizeT stack_size; /**< Maximum size of stack. */
char name[64]; /**< User-assigned thread name. */
Bool on_alt_stack;
/** Whether this structure contains valid information. */
Bool valid;
/** Indicates whether the Valgrind core knows about this thread. */
Bool vg_thread_exists;
/** Indicates whether there is an associated POSIX thread ID. */
Bool posix_thread_exists;
/**
* If true, indicates that there is a corresponding POSIX thread ID and
* a corresponding OS thread that is detached.
*/
Bool detached_posix_thread;
/** Wether recording of memory load accesses is currently enabled. */
Bool is_recording_loads;
/** Wether recording of memory load accesses is currently enabled. */
Bool is_recording_stores;
/** pthread_create() nesting level. */
Int pthread_create_nesting_level;
/** Nesting level of synchronization functions called by the client. */
Int synchr_nesting;
/** Delayed thread deletion sequence number. */
unsigned deletion_seq;
} ThreadInfo;
/*
* Local variables of drd_thread.c that are declared here such that these
* can be accessed by inline functions.
*/
/**
* DRD thread ID of the currently running thread. It is crucial for correct
* operation of DRD that this number is always in sync with
* VG_(get_running_tid)().
*/
extern DrdThreadId DRD_(g_drd_running_tid);
/** Per-thread information managed by DRD. */
extern ThreadInfo DRD_(g_threadinfo)[DRD_N_THREADS];
/** Conflict set for the currently running thread. */
extern struct bitmap* DRD_(g_conflict_set);
/* Function declarations. */
void DRD_(thread_trace_context_switches)(const Bool t);
void DRD_(thread_trace_conflict_set)(const Bool t);
void DRD_(thread_trace_conflict_set_bm)(const Bool t);
Bool DRD_(thread_get_trace_fork_join)(void);
void DRD_(thread_set_trace_fork_join)(const Bool t);
void DRD_(thread_set_segment_merging)(const Bool m);
int DRD_(thread_get_segment_merge_interval)(void);
void DRD_(thread_set_segment_merge_interval)(const int i);
void DRD_(thread_set_join_list_vol)(const int jlv);
DrdThreadId DRD_(VgThreadIdToDrdThreadId)(const ThreadId tid);
DrdThreadId DRD_(NewVgThreadIdToDrdThreadId)(const ThreadId tid);
DrdThreadId DRD_(PtThreadIdToDrdThreadId)(const PThreadId tid);
ThreadId DRD_(DrdThreadIdToVgThreadId)(const DrdThreadId tid);
DrdThreadId DRD_(thread_pre_create)(const DrdThreadId creator,
const ThreadId vg_created);
DrdThreadId DRD_(thread_post_create)(const ThreadId vg_created);
void DRD_(thread_post_join)(DrdThreadId drd_joiner, DrdThreadId drd_joinee);
void DRD_(thread_delete)(const DrdThreadId tid, Bool detached);
void DRD_(thread_finished)(const DrdThreadId tid);
void DRD_(drd_thread_atfork_child)(const DrdThreadId tid);
void DRD_(thread_pre_cancel)(const DrdThreadId tid);
void DRD_(thread_set_stack_startup)(const DrdThreadId tid,
const Addr stack_startup);
Addr DRD_(thread_get_stack_min)(const DrdThreadId tid);
Addr DRD_(thread_get_stack_min_min)(const DrdThreadId tid);
Addr DRD_(thread_get_stack_max)(const DrdThreadId tid);
SizeT DRD_(thread_get_stack_size)(const DrdThreadId tid);
Bool DRD_(thread_get_on_alt_stack)(const DrdThreadId tid);
void DRD_(thread_set_on_alt_stack)(const DrdThreadId tid,
const Bool on_alt_stack);
Int DRD_(thread_get_threads_on_alt_stack)(void);
void DRD_(thread_set_pthreadid)(const DrdThreadId tid, const PThreadId ptid);
Bool DRD_(thread_get_joinable)(const DrdThreadId tid);
void DRD_(thread_set_joinable)(const DrdThreadId tid, const Bool joinable);
void DRD_(thread_entering_pthread_create)(const DrdThreadId tid);
void DRD_(thread_left_pthread_create)(const DrdThreadId tid);
const char* DRD_(thread_get_name)(const DrdThreadId tid);
void DRD_(thread_set_name)(const DrdThreadId tid, const char* const name);
void DRD_(thread_set_vg_running_tid)(const ThreadId vg_tid);
void DRD_(thread_set_running_tid)(const ThreadId vg_tid,
const DrdThreadId drd_tid);
int DRD_(thread_enter_synchr)(const DrdThreadId tid);
int DRD_(thread_leave_synchr)(const DrdThreadId tid);
int DRD_(thread_get_synchr_nesting_count)(const DrdThreadId tid);
void DRD_(thread_new_segment)(const DrdThreadId tid);
VectorClock* DRD_(thread_get_vc)(const DrdThreadId tid);
void DRD_(thread_get_latest_segment)(Segment** sg, const DrdThreadId tid);
void DRD_(thread_combine_vc_join)(const DrdThreadId joiner,
const DrdThreadId joinee);
void DRD_(thread_new_segment_and_combine_vc)(DrdThreadId tid,
const Segment* sg);
void DRD_(thread_update_conflict_set)(const DrdThreadId tid,
const VectorClock* const old_vc);
void DRD_(thread_stop_using_mem)(const Addr a1, const Addr a2);
void DRD_(thread_set_record_loads)(const DrdThreadId tid, const Bool enabled);
void DRD_(thread_set_record_stores)(const DrdThreadId tid, const Bool enabled);
void DRD_(thread_print_all)(void);
void DRD_(thread_report_races)(const DrdThreadId tid);
void DRD_(thread_report_races_segment)(const DrdThreadId tid,
const Segment* const p);
void DRD_(thread_report_all_races)(void);
void DRD_(thread_report_conflicting_segments)(const DrdThreadId tid,
const Addr addr,
const SizeT size,
const BmAccessTypeT access_type);
ULong DRD_(thread_get_context_switch_count)(void);
ULong DRD_(thread_get_report_races_count)(void);
ULong DRD_(thread_get_discard_ordered_segments_count)(void);
ULong DRD_(thread_get_compute_conflict_set_count)(void);
ULong DRD_(thread_get_update_conflict_set_count)(void);
ULong DRD_(thread_get_update_conflict_set_new_sg_count)(void);
ULong DRD_(thread_get_update_conflict_set_sync_count)(void);
ULong DRD_(thread_get_update_conflict_set_join_count)(void);
ULong DRD_(thread_get_conflict_set_bitmap_creation_count)(void);
ULong DRD_(thread_get_conflict_set_bitmap2_creation_count)(void);
/* Inline function definitions. */
/**
* Whether or not the specified DRD thread ID is valid.
*
* A DRD thread ID is valid if and only if the following conditions are met:
* - The ID is a valid index of the DRD_(g_threadinfo)[] array.
* - The ID is not equal to DRD_INVALID_THREADID.
* - The ID refers either to a thread known by the Valgrind core, a joinable
* thread that has not yet been joined or a detached thread.
*/
static __inline__
Bool DRD_(IsValidDrdThreadId)(const DrdThreadId tid)
{
return (0 <= (int)tid && tid < DRD_N_THREADS && tid != DRD_INVALID_THREADID
&& (DRD_(g_threadinfo)[tid].valid));
}
/** Returns the DRD thread ID of the currently running thread. */
static __inline__
DrdThreadId DRD_(thread_get_running_tid)(void)
{
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
tl_assert(DRD_(g_drd_running_tid) != DRD_INVALID_THREADID);
#endif
return DRD_(g_drd_running_tid);
}
/** Returns a pointer to the conflict set for the currently running thread. */
static __inline__
struct bitmap* DRD_(thread_get_conflict_set)(void)
{
return DRD_(g_conflict_set);
}
/**
* Reports whether or not the currently running client thread is executing code
* inside the pthread_create() function.
*/
static __inline__
Bool DRD_(running_thread_inside_pthread_create)(void)
{
return (DRD_(g_threadinfo)[DRD_(g_drd_running_tid)]
.pthread_create_nesting_level > 0);
}
/**
* Reports whether or not recording of memory loads is enabled for the
* currently running client thread.
*/
static __inline__
Bool DRD_(running_thread_is_recording_loads)(void)
{
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
tl_assert(0 <= (int)DRD_(g_drd_running_tid)
&& DRD_(g_drd_running_tid) < DRD_N_THREADS
&& DRD_(g_drd_running_tid) != DRD_INVALID_THREADID);
#endif
return (DRD_(g_threadinfo)[DRD_(g_drd_running_tid)].synchr_nesting == 0
&& DRD_(g_threadinfo)[DRD_(g_drd_running_tid)].is_recording_loads);
}
/**
* Reports whether or not recording memory stores is enabled for the
* currently running client thread.
*/
static __inline__
Bool DRD_(running_thread_is_recording_stores)(void)
{
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
tl_assert(0 <= (int)DRD_(g_drd_running_tid)
&& DRD_(g_drd_running_tid) < DRD_N_THREADS
&& DRD_(g_drd_running_tid) != DRD_INVALID_THREADID);
#endif
return (DRD_(g_threadinfo)[DRD_(g_drd_running_tid)].synchr_nesting == 0
&& DRD_(g_threadinfo)[DRD_(g_drd_running_tid)].is_recording_stores);
}
/**
* Update the information about the lowest stack address that has ever been
* accessed by a thread.
*/
static __inline__
void DRD_(thread_set_stack_min)(const DrdThreadId tid, const Addr stack_min)
{
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
tl_assert(0 <= (int)tid
&& tid < DRD_N_THREADS
&& tid != DRD_INVALID_THREADID);
#endif
DRD_(g_threadinfo)[tid].stack_min = stack_min;
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
/* This function can be called after the thread has been created but */
/* before drd_post_thread_create() has filled in stack_max. */
tl_assert(DRD_(g_threadinfo)[tid].stack_min
< DRD_(g_threadinfo)[tid].stack_max
|| DRD_(g_threadinfo)[tid].stack_max == 0);
#endif
if (UNLIKELY(stack_min < DRD_(g_threadinfo)[tid].stack_min_min))
{
DRD_(g_threadinfo)[tid].stack_min_min = stack_min;
}
}
/**
* Return true if and only if the specified address is on the stack of the
* currently scheduled thread.
*/
static __inline__
Bool DRD_(thread_address_on_stack)(const Addr a)
{
return (DRD_(g_threadinfo)[DRD_(g_drd_running_tid)].stack_min <= a
&& a < DRD_(g_threadinfo)[DRD_(g_drd_running_tid)].stack_max);
}
/**
* Return true if and only if the specified address is on the stack of any
* thread.
*/
static __inline__
Bool DRD_(thread_address_on_any_stack)(const Addr a)
{
int i;
for (i = 1; i < DRD_N_THREADS; i++)
{
if (DRD_(g_threadinfo)[i].vg_thread_exists
&& DRD_(g_threadinfo)[i].stack_min <= a
&& a < DRD_(g_threadinfo)[i].stack_max)
{
return True;
}
}
return False;
}
/** Return a pointer to the latest segment for the specified thread. */
static __inline__
Segment* DRD_(thread_get_segment)(const DrdThreadId tid)
{
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
tl_assert(0 <= (int)tid && tid < DRD_N_THREADS
&& tid != DRD_INVALID_THREADID);
tl_assert(DRD_(g_threadinfo)[tid].last);
#endif
return DRD_(g_threadinfo)[tid].last;
}
/** Return a pointer to the latest segment for the running thread. */
static __inline__
Segment* DRD_(running_thread_get_segment)(void)
{
return DRD_(thread_get_segment)(DRD_(g_drd_running_tid));
}
#endif /* __THREAD_H */