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ftmemsim-valgrind/drd/drd_main.c
Bart Van Assche 0fc0faac85 Added support for pthread_cancel() handling. 
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@8638
2008-09-27 12:36:13 +00:00

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/*
This file is part of drd, a data race detector.
Copyright (C) 2006-2008 Bart Van Assche
bart.vanassche@gmail.com
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.
*/
#include "drd_barrier.h"
#include "drd_clientreq.h"
#include "drd_clientobj.h"
#include "drd_cond.h"
#include "drd_error.h"
#include "drd_malloc_wrappers.h"
#include "drd_mutex.h"
#include "drd_rwlock.h"
#include "drd_segment.h"
#include "drd_semaphore.h"
#include "drd_suppression.h"
#include "drd_thread.h"
#include "drd_thread_bitmap.h"
#include "drd_track.h"
#include "drd_vc.h"
#include "libvex_guest_offsets.h"
#include "pub_drd_bitmap.h"
#include "pub_tool_vki.h" // Must be included before pub_tool_libcproc
#include "pub_tool_basics.h"
#include "pub_tool_debuginfo.h" // VG_(describe_IP)()
#include "pub_tool_libcassert.h" // tl_assert()
#include "pub_tool_libcbase.h" // VG_(strcmp)
#include "pub_tool_libcprint.h" // VG_(printf)
#include "pub_tool_libcproc.h"
#include "pub_tool_machine.h"
#include "pub_tool_mallocfree.h" // VG_(malloc)(), VG_(free)()
#include "pub_tool_options.h" // command line options
#include "pub_tool_replacemalloc.h"
#include "pub_tool_threadstate.h" // VG_(get_running_tid)()
#include "pub_tool_tooliface.h"
/* Include several source files here in order to allow the compiler to */
/* do more inlining. */
#include "drd_bitmap.c"
#include "drd_segment.c"
#include "drd_thread.c"
#include "drd_vc.c"
// Function declarations.
static void drd_start_client_code(const ThreadId tid, const ULong bbs_done);
// Local variables.
static Bool s_drd_check_stack_accesses = False;
static Bool s_drd_print_stats = False;
static Bool s_drd_trace_fork_join = False;
static Bool s_drd_var_info = False;
static Bool s_show_stack_usage = False;
//
// Implement the needs_command_line_options for drd.
//
static Bool drd_process_cmd_line_option(Char* arg)
{
int exclusive_threshold_ms = -1;
int segment_merging = -1;
int shared_threshold_ms = -1;
int show_confl_seg = -1;
int trace_barrier = -1;
int trace_clientobj = -1;
int trace_cond = -1;
int trace_csw = -1;
int trace_conflict_set = -1;
int trace_mutex = -1;
int trace_rwlock = -1;
int trace_segment = -1;
int trace_semaphore = -1;
int trace_suppression = -1;
Char* trace_address = 0;
VG_BOOL_CLO (arg, "--check-stack-var", s_drd_check_stack_accesses)
else VG_BOOL_CLO(arg, "--drd-stats", s_drd_print_stats)
else VG_BOOL_CLO(arg,"--report-signal-unlocked",s_drd_report_signal_unlocked)
else VG_BOOL_CLO(arg, "--segment-merging", segment_merging)
else VG_BOOL_CLO(arg, "--show-confl-seg", show_confl_seg)
else VG_BOOL_CLO(arg, "--show-stack-usage", s_show_stack_usage)
else VG_BOOL_CLO(arg, "--trace-barrier", trace_barrier)
else VG_BOOL_CLO(arg, "--trace-clientobj", trace_clientobj)
else VG_BOOL_CLO(arg, "--trace-cond", trace_cond)
else VG_BOOL_CLO(arg, "--trace-conflict-set", trace_conflict_set)
else VG_BOOL_CLO(arg, "--trace-csw", trace_csw)
else VG_BOOL_CLO(arg, "--trace-fork-join", s_drd_trace_fork_join)
else VG_BOOL_CLO(arg, "--trace-mutex", trace_mutex)
else VG_BOOL_CLO(arg, "--trace-rwlock", trace_rwlock)
else VG_BOOL_CLO(arg, "--trace-segment", trace_segment)
else VG_BOOL_CLO(arg, "--trace-semaphore", trace_semaphore)
else VG_BOOL_CLO(arg, "--trace-suppr", trace_suppression)
else VG_BOOL_CLO(arg, "--var-info", s_drd_var_info)
else VG_NUM_CLO (arg, "--exclusive-threshold", exclusive_threshold_ms)
else VG_NUM_CLO (arg, "--shared-threshold", shared_threshold_ms)
else VG_STR_CLO (arg, "--trace-addr", trace_address)
else
return VG_(replacement_malloc_process_cmd_line_option)(arg);
if (exclusive_threshold_ms != -1)
{
mutex_set_lock_threshold(exclusive_threshold_ms);
rwlock_set_exclusive_threshold(exclusive_threshold_ms);
}
if (shared_threshold_ms != -1)
{
rwlock_set_shared_threshold(shared_threshold_ms);
}
if (segment_merging != -1)
thread_set_segment_merging(segment_merging);
if (show_confl_seg != -1)
set_show_conflicting_segments(show_confl_seg);
if (trace_address)
{
const Addr addr = VG_(strtoll16)(trace_address, 0);
drd_start_tracing_address_range(addr, addr + 1);
}
if (trace_barrier != -1)
barrier_set_trace(trace_barrier);
if (trace_clientobj != -1)
clientobj_set_trace(trace_clientobj);
if (trace_cond != -1)
cond_set_trace(trace_cond);
if (trace_csw != -1)
thread_trace_context_switches(trace_csw);
if (trace_conflict_set != -1)
thread_trace_conflict_set(trace_conflict_set);
if (trace_mutex != -1)
mutex_set_trace(trace_mutex);
if (trace_rwlock != -1)
rwlock_set_trace(trace_rwlock);
if (trace_segment != -1)
sg_set_trace(trace_segment);
if (trace_semaphore != -1)
semaphore_set_trace(trace_semaphore);
if (trace_suppression != -1)
suppression_set_trace(trace_suppression);
return True;
}
static void drd_print_usage(void)
{
VG_(printf)(
" --check-stack-var=yes|no Whether or not to report data races on\n"
" stack variables [no].\n"
" --exclusive-threshold=<n> Print an error message if any mutex or\n"
" writer lock is held longer than the specified time (in milliseconds).\n"
" --report-signal-unlocked=yes|no Whether to report calls to\n"
" pthread_cond_signal() where the mutex associated\n"
" with the signal via pthread_cond_wait() is not\n"
" locked at the time the signal is sent [yes].\n"
" --segment-merging=yes|no Controls segment merging [yes].\n"
" Segment merging is an algorithm to limit memory usage of the\n"
" data race detection algorithm. Disabling segment merging may\n"
" improve the accuracy of the so-called 'other segments' displayed\n"
" in race reports but can also trigger an out of memory error.\n"
" --shared-threshold=<n> Print an error message if a reader lock\n"
" is held longer than the specified time (in milliseconds).\n"
" --show-confl-seg=yes|no Show conflicting segments in race reports [yes].\n"
" --show-stack-usage=yes|no Print stack usage at thread exit time [no].\n"
" --var-info=yes|no Display the names of global, static and\n"
" stack variables when a race is reported on such a variable. This\n"
" information is by default not displayed since for big programs\n"
" reading in all debug information at once may cause an out of\n"
" memory error [no].\n"
"\n"
" drd options for monitoring process behavior:\n"
" --trace-addr=<address> Trace all load and store activity for the.\n"
" specified address [off].\n"
" --trace-barrier=yes|no Trace all barrier activity [no].\n"
" --trace-cond=yes|no Trace all condition variable activity [no].\n"
" --trace-fork-join=yes|no Trace all thread fork/join activity [no].\n"
" --trace-mutex=yes|no Trace all mutex activity [no].\n"
" --trace-rwlock=yes|no Trace all reader-writer lock activity[no].\n"
" --trace-semaphore=yes|no Trace all semaphore activity [no].\n"
);
VG_(replacement_malloc_print_usage)();
}
static void drd_print_debug_usage(void)
{
VG_(printf)(
" --drd-stats=yes|no Print statistics about DRD activity [no].\n"
" --trace-clientobj=yes|no Trace all client object activity [no].\n"
" --trace-csw=yes|no Trace all scheduler context switches [no].\n"
" --trace-conflict-set=yes|no Trace all conflict set updates [no].\n"
" --trace-segment=yes|no Trace segment actions [no].\n"
" --trace-suppr=yes|no Trace all address suppression actions [no].\n"
);
VG_(replacement_malloc_print_debug_usage)();
}
//
// Implements the thread-related core callbacks.
//
static void drd_trace_mem_access(const Addr addr, const SizeT size,
const BmAccessTypeT access_type)
{
if (drd_is_any_traced(addr, addr + size))
{
char vc[80];
vc_snprint(vc, sizeof(vc), thread_get_vc(thread_get_running_tid()));
VG_(message)(Vg_UserMsg,
"%s 0x%lx size %ld (vg %d / drd %d / vc %s)",
access_type == eLoad
? "load "
: access_type == eStore
? "store"
: access_type == eStart
? "start"
: access_type == eEnd
? "end "
: "????",
addr,
size,
VG_(get_running_tid)(),
thread_get_running_tid(),
vc);
VG_(get_and_pp_StackTrace)(VG_(get_running_tid)(),
VG_(clo_backtrace_size));
tl_assert(DrdThreadIdToVgThreadId(thread_get_running_tid())
== VG_(get_running_tid)());
}
}
static VG_REGPARM(2) void drd_trace_mem_load(const Addr addr, const SizeT size)
{
return drd_trace_mem_access(addr, size, eLoad);
}
static VG_REGPARM(2) void drd_trace_mem_store(const Addr addr,const SizeT size)
{
return drd_trace_mem_access(addr, size, eStore);
}
static void drd_report_race(const Addr addr, const SizeT size,
const BmAccessTypeT access_type)
{
DataRaceErrInfo drei;
drei.tid = thread_get_running_tid();
drei.addr = addr;
drei.size = size;
drei.access_type = access_type;
VG_(maybe_record_error)(VG_(get_running_tid)(),
DataRaceErr,
VG_(get_IP)(VG_(get_running_tid)()),
"Conflicting accesses",
&drei);
}
static VG_REGPARM(2) void drd_trace_load(Addr addr, SizeT size)
{
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
/* The assert below has been commented out because of performance reasons.*/
tl_assert(thread_get_running_tid()
== VgThreadIdToDrdThreadId(VG_(get_running_tid())));
#endif
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_load_triggers_conflict(addr, addr + size)
&& ! drd_is_suppressed(addr, addr + size))
{
drd_report_race(addr, size, eLoad);
}
}
static VG_REGPARM(1) void drd_trace_load_1(Addr addr)
{
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_load_1_triggers_conflict(addr)
&& ! drd_is_suppressed(addr, addr + 1))
{
drd_report_race(addr, 1, eLoad);
}
}
static VG_REGPARM(1) void drd_trace_load_2(Addr addr)
{
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_load_2_triggers_conflict(addr)
&& ! drd_is_suppressed(addr, addr + 2))
{
drd_report_race(addr, 2, eLoad);
}
}
static VG_REGPARM(1) void drd_trace_load_4(Addr addr)
{
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_load_4_triggers_conflict(addr)
&& ! drd_is_suppressed(addr, addr + 4))
{
drd_report_race(addr, 4, eLoad);
}
}
static VG_REGPARM(1) void drd_trace_load_8(Addr addr)
{
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_load_8_triggers_conflict(addr)
&& ! drd_is_suppressed(addr, addr + 8))
{
drd_report_race(addr, 8, eLoad);
}
}
static
VG_REGPARM(2) void drd_trace_store(Addr addr, SizeT size)
{
#ifdef ENABLE_DRD_CONSISTENCY_CHECKS
/* The assert below has been commented out because of performance reasons.*/
tl_assert(thread_get_running_tid()
== VgThreadIdToDrdThreadId(VG_(get_running_tid())));
#endif
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_store_triggers_conflict(addr, addr + size)
&& ! drd_is_suppressed(addr, addr + size))
{
drd_report_race(addr, size, eStore);
}
}
static VG_REGPARM(1) void drd_trace_store_1(Addr addr)
{
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_store_1_triggers_conflict(addr)
&& ! drd_is_suppressed(addr, addr + 1))
{
drd_report_race(addr, 1, eStore);
}
}
static VG_REGPARM(1) void drd_trace_store_2(Addr addr)
{
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_store_2_triggers_conflict(addr)
&& ! drd_is_suppressed(addr, addr + 2))
{
drd_report_race(addr, 2, eStore);
}
}
static VG_REGPARM(1) void drd_trace_store_4(Addr addr)
{
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_store_4_triggers_conflict(addr)
&& ! drd_is_suppressed(addr, addr + 4))
{
drd_report_race(addr, 4, eStore);
}
}
static VG_REGPARM(1) void drd_trace_store_8(Addr addr)
{
if (running_thread_is_recording()
&& (s_drd_check_stack_accesses || ! thread_address_on_stack(addr))
&& bm_access_store_8_triggers_conflict(addr)
&& ! drd_is_suppressed(addr, addr + 8))
{
drd_report_race(addr, 8, eStore);
}
}
static void drd_pre_mem_read(const CorePart part,
const ThreadId tid,
Char* const s,
const Addr a,
const SizeT size)
{
if (size > 0)
{
drd_trace_load(a, size);
}
}
static void drd_pre_mem_read_asciiz(const CorePart part,
const ThreadId tid,
Char* const s,
const Addr a)
{
const char* p = (void*)a;
SizeT size = 0;
/* Note: the expression '*p' reads client memory and may crash if the */
/* client provided an invalid pointer ! */
while (*p)
{
p++;
size++;
}
// To do: find out what a reasonable upper limit on 'size' is.
tl_assert(size < 4096);
if (size > 0)
{
drd_trace_load(a, size);
}
}
static void drd_post_mem_write(const CorePart part,
const ThreadId tid,
const Addr a,
const SizeT size)
{
thread_set_vg_running_tid(VG_(get_running_tid)());
if (size > 0)
{
drd_trace_store(a, size);
}
}
static __inline__
void drd_start_using_mem(const Addr a1, const SizeT len)
{
tl_assert(a1 < a1 + len);
if (UNLIKELY(drd_any_address_is_traced()))
{
drd_trace_mem_access(a1, len, eStart);
}
}
static void drd_start_using_mem_w_ecu(const Addr a1,
const SizeT len,
UInt ec_uniq)
{
drd_start_using_mem(a1, len);
}
static void drd_start_using_mem_w_tid(const Addr a1,
const SizeT len,
ThreadId tid)
{
drd_start_using_mem(a1, len);
}
static __inline__
void drd_stop_using_mem(const Addr a1, const SizeT len,
const Bool is_stack_mem)
{
const Addr a2 = a1 + len;
tl_assert(a1 < a2);
if (UNLIKELY(drd_any_address_is_traced()))
{
drd_trace_mem_access(a1, len, eEnd);
}
if (! is_stack_mem || s_drd_check_stack_accesses)
{
thread_stop_using_mem(a1, a2);
clientobj_stop_using_mem(a1, a2);
drd_suppression_stop_using_mem(a1, a2);
}
}
static __inline__
void drd_stop_using_nonstack_mem(const Addr a1, const SizeT len)
{
drd_stop_using_mem(a1, len, False);
}
/** Suppress data race reports on all addresses contained in .plt and
* .got.plt sections inside the address range [ a, a + len [. The data in
* these sections is modified by _dl_relocate_object() every time a function
* in a shared library is called for the first time. Since the first call
* to a function in a shared library can happen from a multithreaded context,
* such calls can cause conflicting accesses. See also Ulrich Drepper's
* paper "How to Write Shared Libraries" for more information about relocation
* (http://people.redhat.com/drepper/dsohowto.pdf).
*/
static void suppress_relocation_conflicts(const Addr a, const SizeT len)
{
const DebugInfo* di;
#if 0
VG_(printf)("Evaluating range @ 0x%lx size %ld\n", a, len);
#endif
for (di = VG_(next_seginfo)(0); di; di = VG_(next_seginfo)(di))
{
Addr avma;
SizeT size;
avma = VG_(seginfo_get_plt_avma)(di);
size = VG_(seginfo_get_plt_size)(di);
if (size > 0 && a <= avma && avma + size <= a + len)
{
#if 0
VG_(printf)("Suppressing .plt @ 0x%lx size %ld\n", avma, size);
#endif
tl_assert(VG_(seginfo_sect_kind)(NULL, 0, avma) == Vg_SectPLT);
drd_start_suppression(avma, avma + size, ".plt");
}
avma = VG_(seginfo_get_gotplt_avma)(di);
size = VG_(seginfo_get_gotplt_size)(di);
if (size > 0 && a <= avma && avma + size <= a + len)
{
#if 0
VG_(printf)("Suppressing .got.plt @ 0x%lx size %ld\n", avma, size);
#endif
tl_assert(VG_(seginfo_sect_kind)(NULL, 0, avma) == Vg_SectGOTPLT);
drd_start_suppression(avma, avma + size, ".gotplt");
}
}
}
static
void drd_start_using_mem_w_perms(const Addr a, const SizeT len,
const Bool rr, const Bool ww, const Bool xx,
ULong di_handle)
{
thread_set_vg_running_tid(VG_(get_running_tid)());
drd_start_using_mem(a, len);
suppress_relocation_conflicts(a, len);
}
/* Called by the core when the stack of a thread grows, to indicate that */
/* the addresses in range [ a, a + len [ may now be used by the client. */
/* Assumption: stacks grow downward. */
static __inline__
void drd_start_using_mem_stack(const Addr a, const SizeT len)
{
thread_set_stack_min(thread_get_running_tid(), a - VG_STACK_REDZONE_SZB);
drd_start_using_mem(a - VG_STACK_REDZONE_SZB,
len + VG_STACK_REDZONE_SZB);
}
/* Called by the core when the stack of a thread shrinks, to indicate that */
/* the addresses [ a, a + len [ are no longer accessible for the client. */
/* Assumption: stacks grow downward. */
static __inline__
void drd_stop_using_mem_stack(const Addr a, const SizeT len)
{
thread_set_stack_min(thread_get_running_tid(),
a + len - VG_STACK_REDZONE_SZB);
drd_stop_using_mem(a - VG_STACK_REDZONE_SZB, len + VG_STACK_REDZONE_SZB,
True);
}
static void drd_start_using_mem_stack_signal(
const Addr a, const SizeT len,
ThreadId tid_for_whom_the_signal_frame_is_being_constructed)
{
thread_set_vg_running_tid(VG_(get_running_tid)());
drd_start_using_mem(a, len);
}
static void drd_stop_using_mem_stack_signal(Addr a, SizeT len)
{
drd_stop_using_mem(a, len, True);
}
static
void drd_pre_thread_create(const ThreadId creator, const ThreadId created)
{
const DrdThreadId drd_creator = VgThreadIdToDrdThreadId(creator);
tl_assert(created != VG_INVALID_THREADID);
thread_pre_create(drd_creator, created);
if (IsValidDrdThreadId(drd_creator))
{
thread_new_segment(drd_creator);
}
if (s_drd_trace_fork_join)
{
VG_(message)(Vg_DebugMsg,
"drd_pre_thread_create creator = %d/%d, created = %d",
creator, drd_creator, created);
}
}
/* Called by Valgrind's core before any loads or stores are performed on */
/* the context of thread "created". At startup, this function is called */
/* with arguments (0,1). */
static
void drd_post_thread_create(const ThreadId vg_created)
{
DrdThreadId drd_created;
tl_assert(vg_created != VG_INVALID_THREADID);
drd_created = thread_post_create(vg_created);
if (s_drd_trace_fork_join)
{
VG_(message)(Vg_DebugMsg,
"drd_post_thread_create created = %d/%d",
vg_created, drd_created);
}
if (! s_drd_check_stack_accesses)
{
drd_start_suppression(thread_get_stack_max(drd_created)
- thread_get_stack_size(drd_created),
thread_get_stack_max(drd_created),
"stack");
}
}
/* Process VG_USERREQ__POST_THREAD_JOIN. This client request is invoked just */
/* after thread drd_joiner joined thread drd_joinee. */
void drd_post_thread_join(DrdThreadId drd_joiner, DrdThreadId drd_joinee)
{
tl_assert(IsValidDrdThreadId(drd_joiner));
tl_assert(IsValidDrdThreadId(drd_joinee));
thread_new_segment(drd_joinee);
thread_combine_vc(drd_joiner, drd_joinee);
thread_new_segment(drd_joiner);
if (s_drd_trace_fork_join)
{
const ThreadId joiner = DrdThreadIdToVgThreadId(drd_joiner);
const ThreadId joinee = DrdThreadIdToVgThreadId(drd_joinee);
const unsigned msg_size = 256;
char* msg;
msg = VG_(malloc)("drd.main.dptj.1", msg_size);
tl_assert(msg);
VG_(snprintf)(msg, msg_size,
"drd_post_thread_join joiner = %d/%d, joinee = %d/%d",
joiner, drd_joiner, joinee, drd_joinee);
if (joiner)
{
VG_(snprintf)(msg + VG_(strlen)(msg), msg_size - VG_(strlen)(msg),
", new vc: ");
vc_snprint(msg + VG_(strlen)(msg), msg_size - VG_(strlen)(msg),
thread_get_vc(drd_joiner));
}
VG_(message)(Vg_DebugMsg, "%s", msg);
VG_(free)(msg);
}
if (! s_drd_check_stack_accesses)
{
drd_finish_suppression(thread_get_stack_max(drd_joinee)
- thread_get_stack_size(drd_joinee),
thread_get_stack_max(drd_joinee));
}
thread_delete(drd_joinee);
mutex_thread_delete(drd_joinee);
cond_thread_delete(drd_joinee);
semaphore_thread_delete(drd_joinee);
barrier_thread_delete(drd_joinee);
}
void drd_pre_thread_cancel(DrdThreadId canceling, DrdThreadId canceled)
{
thread_pre_cancel(canceled);
}
void drd_post_thread_cancel(DrdThreadId canceling, DrdThreadId canceled, Bool succeeded)
{ }
/* Called after a thread has performed its last memory access. */
static void drd_thread_finished(ThreadId vg_tid)
{
DrdThreadId drd_tid;
tl_assert(VG_(get_running_tid)() == vg_tid);
drd_tid = VgThreadIdToDrdThreadId(vg_tid);
if (s_drd_trace_fork_join)
{
VG_(message)(Vg_DebugMsg,
"drd_thread_finished tid = %d/%d%s",
vg_tid,
drd_tid,
thread_get_joinable(drd_tid)
? ""
: " (which is a detached thread)");
}
if (s_show_stack_usage)
{
const SizeT stack_size = thread_get_stack_size(drd_tid);
const SizeT used_stack
= thread_get_stack_max(drd_tid) - thread_get_stack_min_min(drd_tid);
VG_(message)(Vg_UserMsg,
"thread %d/%d%s finished and used %ld bytes out of %ld"
" on its stack. Margin: %ld bytes.",
vg_tid,
drd_tid,
thread_get_joinable(drd_tid)
? ""
: " (which is a detached thread)",
used_stack,
stack_size,
stack_size - used_stack);
}
drd_stop_using_mem(thread_get_stack_min(drd_tid),
thread_get_stack_max(drd_tid)
- thread_get_stack_min(drd_tid),
True);
thread_stop_recording(drd_tid);
thread_finished(drd_tid);
}
void drd_pre_mutex_init(const Addr mutex, const MutexT mutex_type)
{
mutex_init(mutex, mutex_type);
}
void drd_post_mutex_destroy(const Addr mutex, const MutexT mutex_type)
{
mutex_post_destroy(mutex);
}
void drd_pre_mutex_lock(const Addr mutex, const MutexT mutex_type,
const Bool trylock)
{
mutex_pre_lock(mutex, mutex_type, trylock);
}
void drd_post_mutex_lock(const Addr mutex, const Bool took_lock)
{
mutex_post_lock(mutex, took_lock, False);
}
void drd_pre_mutex_unlock(const Addr mutex, const MutexT mutex_type)
{
mutex_unlock(mutex, mutex_type);
}
void drd_pre_cond_init(Addr cond)
{
cond_pre_init(cond);
}
void drd_post_cond_destroy(Addr cond)
{
cond_post_destroy(cond);
}
void drd_semaphore_init(const Addr semaphore,
const Word pshared, const Word value)
{
semaphore_init(semaphore, pshared, value);
}
void drd_semaphore_destroy(const Addr semaphore)
{
semaphore_destroy(semaphore);
}
void drd_semaphore_pre_wait(const DrdThreadId tid, const Addr semaphore)
{
semaphore_pre_wait(semaphore);
}
void drd_semaphore_post_wait(const DrdThreadId tid, const Addr semaphore,
const Bool waited)
{
semaphore_post_wait(tid, semaphore, waited);
}
void drd_semaphore_pre_post(const DrdThreadId tid, const Addr semaphore)
{
semaphore_pre_post(tid, semaphore);
}
void drd_semaphore_post_post(const DrdThreadId tid, const Addr semaphore,
const Bool waited)
{
semaphore_post_post(tid, semaphore, waited);
}
void drd_barrier_init(const Addr barrier,
const BarrierT barrier_type, const Word count,
const Bool reinitialization)
{
barrier_init(barrier, barrier_type, count, reinitialization);
}
void drd_barrier_destroy(const Addr barrier, const BarrierT barrier_type)
{
barrier_destroy(barrier, barrier_type);
}
void drd_barrier_pre_wait(const DrdThreadId tid, const Addr barrier,
const BarrierT barrier_type)
{
barrier_pre_wait(tid, barrier, barrier_type);
}
void drd_barrier_post_wait(const DrdThreadId tid, const Addr barrier,
const BarrierT barrier_type, const Bool waited)
{
barrier_post_wait(tid, barrier, barrier_type, waited);
}
//
// Implementation of the tool interface.
//
static
void drd_post_clo_init(void)
{
# if defined(VGP_x86_linux) || defined(VGP_amd64_linux) \
|| defined(VGP_ppc32_linux) || defined(VGP_ppc64_linux)
/* fine */
# else
VG_(printf)("\nWARNING: DRD has only been tested on Linux.\n\n");
# endif
if (s_drd_var_info)
{
VG_(needs_var_info)();
}
}
#if defined(VGA_x86)
#define STACK_POINTER_OFFSET OFFSET_x86_ESP
#elif defined(VGA_amd64)
#define STACK_POINTER_OFFSET OFFSET_amd64_RSP
#elif defined(VGA_ppc32)
#define STACK_POINTER_OFFSET ((OFFSET_ppc32_GPR0 + OFFSET_ppc32_GPR2) / 2)
#elif defined(VGA_ppc64)
#define STACK_POINTER_OFFSET ((OFFSET_ppc64_GPR0 + OFFSET_ppc64_GPR2) / 2)
#else
#error Unknown architecture.
#endif
/** Return true if and only if addr_expr matches the pattern (SP) or
* <offset>(SP).
*/
static Bool is_stack_access(IRSB* const bb, IRExpr* const addr_expr)
{
Bool result = False;
if (addr_expr->tag == Iex_RdTmp)
{
int i;
for (i = 0; i < bb->stmts_size; i++)
{
if (bb->stmts[i]
&& bb->stmts[i]->tag == Ist_WrTmp
&& bb->stmts[i]->Ist.WrTmp.tmp == addr_expr->Iex.RdTmp.tmp)
{
IRExpr* e = bb->stmts[i]->Ist.WrTmp.data;
if (e->tag == Iex_Get && e->Iex.Get.offset == STACK_POINTER_OFFSET)
{
result = True;
}
//ppIRExpr(e);
//VG_(printf)(" (%s)\n", result ? "True" : "False");
break;
}
}
}
return result;
}
static void instrument_load(IRSB* const bb,
IRExpr* const addr_expr,
const HWord size)
{
IRExpr* size_expr;
IRExpr** argv;
IRDirty* di;
if (UNLIKELY(drd_any_address_is_traced()))
{
addStmtToIRSB(bb,
IRStmt_Dirty(
unsafeIRDirty_0_N(/*regparms*/2,
"drd_trace_load",
VG_(fnptr_to_fnentry)
(drd_trace_mem_load),
mkIRExprVec_2(addr_expr,
mkIRExpr_HWord(size)))));
}
if (! s_drd_check_stack_accesses && is_stack_access(bb, addr_expr))
return;
switch (size)
{
case 1:
argv = mkIRExprVec_1(addr_expr);
di = unsafeIRDirty_0_N(/*regparms*/1,
"drd_trace_load_1",
VG_(fnptr_to_fnentry)(drd_trace_load_1),
argv);
break;
case 2:
argv = mkIRExprVec_1(addr_expr);
di = unsafeIRDirty_0_N(/*regparms*/1,
"drd_trace_load_2",
VG_(fnptr_to_fnentry)(drd_trace_load_2),
argv);
break;
case 4:
argv = mkIRExprVec_1(addr_expr);
di = unsafeIRDirty_0_N(/*regparms*/1,
"drd_trace_load_4",
VG_(fnptr_to_fnentry)(drd_trace_load_4),
argv);
break;
case 8:
argv = mkIRExprVec_1(addr_expr);
di = unsafeIRDirty_0_N(/*regparms*/1,
"drd_trace_load_8",
VG_(fnptr_to_fnentry)(drd_trace_load_8),
argv);
break;
default:
size_expr = mkIRExpr_HWord(size);
argv = mkIRExprVec_2(addr_expr, size_expr);
di = unsafeIRDirty_0_N(/*regparms*/2,
"drd_trace_load",
VG_(fnptr_to_fnentry)(drd_trace_load),
argv);
break;
}
addStmtToIRSB(bb, IRStmt_Dirty(di));
}
static void instrument_store(IRSB* const bb,
IRExpr* const addr_expr,
const HWord size)
{
IRExpr* size_expr;
IRExpr** argv;
IRDirty* di;
if (UNLIKELY(drd_any_address_is_traced()))
{
addStmtToIRSB(bb,
IRStmt_Dirty(
unsafeIRDirty_0_N(/*regparms*/2,
"drd_trace_store",
VG_(fnptr_to_fnentry)
(drd_trace_mem_store),
mkIRExprVec_2(addr_expr,
mkIRExpr_HWord(size)))));
}
if (! s_drd_check_stack_accesses && is_stack_access(bb, addr_expr))
return;
switch (size)
{
case 1:
argv = mkIRExprVec_1(addr_expr);
di = unsafeIRDirty_0_N(/*regparms*/1,
"drd_trace_store_1",
VG_(fnptr_to_fnentry)(drd_trace_store_1),
argv);
break;
case 2:
argv = mkIRExprVec_1(addr_expr);
di = unsafeIRDirty_0_N(/*regparms*/1,
"drd_trace_store_2",
VG_(fnptr_to_fnentry)(drd_trace_store_2),
argv);
break;
case 4:
argv = mkIRExprVec_1(addr_expr);
di = unsafeIRDirty_0_N(/*regparms*/1,
"drd_trace_store_4",
VG_(fnptr_to_fnentry)(drd_trace_store_4),
argv);
break;
case 8:
argv = mkIRExprVec_1(addr_expr);
di = unsafeIRDirty_0_N(/*regparms*/1,
"drd_trace_store_8",
VG_(fnptr_to_fnentry)(drd_trace_store_8),
argv);
break;
default:
size_expr = mkIRExpr_HWord(size);
argv = mkIRExprVec_2(addr_expr, size_expr);
di = unsafeIRDirty_0_N(/*regparms*/2,
"drd_trace_store",
VG_(fnptr_to_fnentry)(drd_trace_store),
argv);
break;
}
addStmtToIRSB(bb, IRStmt_Dirty(di));
}
static
IRSB* drd_instrument(VgCallbackClosure* const closure,
IRSB* const bb_in,
VexGuestLayout* const layout,
VexGuestExtents* const vge,
IRType const gWordTy,
IRType const hWordTy)
{
IRDirty* di;
Int i;
IRSB* bb;
IRExpr** argv;
Bool instrument = True;
Bool bus_locked = False;
/* Set up BB */
bb = emptyIRSB();
bb->tyenv = deepCopyIRTypeEnv(bb_in->tyenv);
bb->next = deepCopyIRExpr(bb_in->next);
bb->jumpkind = bb_in->jumpkind;
for (i = 0; i < bb_in->stmts_used; i++)
{
IRStmt* const st = bb_in->stmts[i];
tl_assert(st);
if (st->tag == Ist_NoOp)
continue;
switch (st->tag)
{
/* Note: the code for not instrumenting the code in .plt */
/* sections is only necessary on CentOS 3.0 x86 (kernel 2.4.21 */
/* + glibc 2.3.2 + NPTL 0.60 + binutils 2.14.90.0.4). */
/* This is because on this platform dynamic library symbols are */
/* relocated in another way than by later binutils versions. The */
/* linker e.g. does not generate .got.plt sections on CentOS 3.0. */
case Ist_IMark:
instrument = VG_(seginfo_sect_kind)(NULL, 0, st->Ist.IMark.addr)
!= Vg_SectPLT;
addStmtToIRSB(bb, st);
break;
case Ist_MBE:
switch (st->Ist.MBE.event)
{
case Imbe_Fence:
break; /* not interesting */
case Imbe_BusLock:
case Imbe_SnoopedStoreBegin:
tl_assert(! bus_locked);
bus_locked = True;
break;
case Imbe_BusUnlock:
case Imbe_SnoopedStoreEnd:
tl_assert(bus_locked);
bus_locked = False;
break;
default:
tl_assert(0);
}
addStmtToIRSB(bb, st);
break;
case Ist_Store:
if (instrument && ! bus_locked)
{
instrument_store(bb,
st->Ist.Store.addr,
sizeofIRType(typeOfIRExpr(bb->tyenv,
st->Ist.Store.data)));
}
addStmtToIRSB(bb, st);
break;
case Ist_WrTmp:
if (instrument)
{
const IRExpr* const data = st->Ist.WrTmp.data;
if (data->tag == Iex_Load)
{
instrument_load(bb,
data->Iex.Load.addr,
sizeofIRType(data->Iex.Load.ty));
}
}
addStmtToIRSB(bb, st);
break;
case Ist_Dirty:
if (instrument)
{
IRDirty* d = st->Ist.Dirty.details;
IREffect const mFx = d->mFx;
switch (mFx) {
case Ifx_None:
break;
case Ifx_Read:
case Ifx_Write:
case Ifx_Modify:
tl_assert(d->mAddr);
tl_assert(d->mSize > 0);
argv = mkIRExprVec_2(d->mAddr, mkIRExpr_HWord(d->mSize));
if (mFx == Ifx_Read || mFx == Ifx_Modify) {
di = unsafeIRDirty_0_N(
/*regparms*/2,
"drd_trace_load",
VG_(fnptr_to_fnentry)(drd_trace_load),
argv);
addStmtToIRSB(bb, IRStmt_Dirty(di));
}
if ((mFx == Ifx_Write || mFx == Ifx_Modify)
&& ! bus_locked)
{
di = unsafeIRDirty_0_N(
/*regparms*/2,
"drd_trace_store",
VG_(fnptr_to_fnentry)(drd_trace_store),
argv);
addStmtToIRSB(bb, IRStmt_Dirty(di));
}
break;
default:
tl_assert(0);
}
}
addStmtToIRSB(bb, st);
break;
default:
addStmtToIRSB(bb, st);
break;
}
}
tl_assert(! bus_locked);
return bb;
}
static void drd_start_client_code(const ThreadId tid, const ULong bbs_done)
{
tl_assert(tid == VG_(get_running_tid)());
thread_set_vg_running_tid(tid);
}
static
void drd_fini(Int exitcode)
{
// thread_print_all();
if (VG_(clo_verbosity) > 1 || s_drd_print_stats)
{
ULong update_conflict_set_count;
ULong dsnsc;
ULong dscvc;
update_conflict_set_count
= thread_get_update_conflict_set_count(&dsnsc, &dscvc);
VG_(message)(Vg_UserMsg,
" thread: %lld context switches"
" / %lld updates of the conflict set",
thread_get_context_switch_count(),
update_conflict_set_count);
VG_(message)(Vg_UserMsg,
" (%lld new sg + %lld combine vc + %lld csw).",
dsnsc,
dscvc,
update_conflict_set_count - dsnsc - dscvc);
VG_(message)(Vg_UserMsg,
" segments: created %lld segments, max %lld alive,"
" %lld discard points.",
sg_get_created_segments_count(),
sg_get_max_alive_segments_count(),
thread_get_discard_ordered_segments_count());
VG_(message)(Vg_UserMsg,
" (%lld m, %lld rw, %lld s, %lld b)",
get_mutex_segment_creation_count(),
get_rwlock_segment_creation_count(),
get_semaphore_segment_creation_count(),
get_barrier_segment_creation_count());
VG_(message)(Vg_UserMsg,
" bitmaps: %lld level 1 / %lld level 2 bitmap refs",
bm_get_bitmap_creation_count(),
bm_get_bitmap2_node_creation_count());
VG_(message)(Vg_UserMsg,
" and %lld level 2 bitmaps were allocated.",
bm_get_bitmap2_creation_count());
VG_(message)(Vg_UserMsg,
" mutex: %lld non-recursive lock/unlock events.",
get_mutex_lock_count());
drd_print_malloc_stats();
}
}
static
void drd_pre_clo_init(void)
{
// Basic tool stuff.
VG_(details_name) ("drd");
VG_(details_version) (NULL);
VG_(details_description) ("a thread error detector");
VG_(details_copyright_author)("Copyright (C) 2006-2008, and GNU GPL'd,"
" by Bart Van Assche.");
VG_(details_bug_reports_to) (VG_BUGS_TO);
VG_(basic_tool_funcs) (drd_post_clo_init,
drd_instrument,
drd_fini);
// Command line stuff.
VG_(needs_command_line_options)(drd_process_cmd_line_option,
drd_print_usage,
drd_print_debug_usage);
// Error handling.
drd_register_error_handlers();
// Core event tracking.
VG_(track_pre_mem_read) (drd_pre_mem_read);
VG_(track_pre_mem_read_asciiz) (drd_pre_mem_read_asciiz);
VG_(track_post_mem_write) (drd_post_mem_write);
VG_(track_new_mem_brk) (drd_start_using_mem_w_tid);
VG_(track_new_mem_mmap) (drd_start_using_mem_w_perms);
VG_(track_new_mem_stack) (drd_start_using_mem_stack);
VG_(track_new_mem_stack_signal) (drd_start_using_mem_stack_signal);
VG_(track_new_mem_startup) (drd_start_using_mem_w_perms);
VG_(track_die_mem_brk) (drd_stop_using_nonstack_mem);
VG_(track_die_mem_munmap) (drd_stop_using_nonstack_mem);
VG_(track_die_mem_stack) (drd_stop_using_mem_stack);
VG_(track_die_mem_stack_signal) (drd_stop_using_mem_stack_signal);
VG_(track_start_client_code) (drd_start_client_code);
VG_(track_pre_thread_ll_create) (drd_pre_thread_create);
VG_(track_pre_thread_first_insn)(drd_post_thread_create);
VG_(track_pre_thread_ll_exit) (drd_thread_finished);
// Other stuff.
drd_register_malloc_wrappers(drd_start_using_mem_w_ecu,
drd_stop_using_nonstack_mem);
drd_clientreq_init();
drd_suppression_init();
clientobj_init();
}
VG_DETERMINE_INTERFACE_VERSION(drd_pre_clo_init)
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