/* This file is part of drd, a thread error detector. Copyright (C) 2006-2017 Bart Van Assche . 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_clientobj.h" #include "drd_clientreq.h" #include "drd_cond.h" #include "drd_error.h" #include "drd_hb.h" #include "drd_load_store.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 "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_libcassert.h" // tl_assert() #include "pub_tool_libcbase.h" // VG_(strcmp) #include "pub_tool_libcprint.h" // VG_(printf) #include "pub_tool_libcproc.h" // VG_(getenv)() #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 "pub_tool_aspacemgr.h" // VG_(am_is_valid_for_client) /* Local variables. */ static Bool s_print_stats; static Bool s_var_info; static Bool s_show_stack_usage; static Bool s_trace_alloc; static Bool trace_sectsuppr; /** * Implement the needs_command_line_options for drd. */ static Bool DRD_(process_cmd_line_option)(const HChar* arg) { int check_stack_accesses = -1; int join_list_vol = -1; int exclusive_threshold_ms = -1; int first_race_only = -1; int report_signal_unlocked = -1; int segment_merging = -1; int segment_merge_interval = -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_fork_join = -1; int trace_hb = -1; int trace_conflict_set = -1; int trace_conflict_set_bm = -1; int trace_mutex = -1; int trace_rwlock = -1; int trace_segment = -1; int trace_semaphore = -1; int trace_suppression = -1; const HChar* trace_address = 0; const HChar* ptrace_address= 0; if VG_BOOL_CLO(arg, "--check-stack-var", check_stack_accesses) {} else if VG_INT_CLO (arg, "--join-list-vol", join_list_vol) {} else if VG_BOOL_CLO(arg, "--drd-stats", s_print_stats) {} else if VG_BOOL_CLO(arg, "--first-race-only", first_race_only) {} else if VG_BOOL_CLO(arg, "--free-is-write", DRD_(g_free_is_write)) {} else if VG_BOOL_CLO(arg,"--report-signal-unlocked",report_signal_unlocked) {} else if VG_BOOL_CLO(arg, "--segment-merging", segment_merging) {} else if VG_INT_CLO (arg, "--segment-merging-interval", segment_merge_interval) {} else if VG_BOOL_CLO(arg, "--show-confl-seg", show_confl_seg) {} else if VG_BOOL_CLO(arg, "--show-stack-usage", s_show_stack_usage) {} else if VG_BOOL_CLO(arg, "--ignore-thread-creation", DRD_(ignore_thread_creation)) {} else if VG_BOOL_CLO(arg, "--trace-alloc", s_trace_alloc) {} else if VG_BOOL_CLO(arg, "--trace-barrier", trace_barrier) {} else if VG_BOOL_CLO(arg, "--trace-clientobj", trace_clientobj) {} else if VG_BOOL_CLO(arg, "--trace-cond", trace_cond) {} else if VG_BOOL_CLO(arg, "--trace-conflict-set", trace_conflict_set) {} else if VG_BOOL_CLO(arg, "--trace-conflict-set-bm", trace_conflict_set_bm){} else if VG_BOOL_CLO(arg, "--trace-csw", trace_csw) {} else if VG_BOOL_CLO(arg, "--trace-fork-join", trace_fork_join) {} else if VG_BOOL_CLO(arg, "--trace-hb", trace_hb) {} else if VG_BOOL_CLO(arg, "--trace-mutex", trace_mutex) {} else if VG_BOOL_CLO(arg, "--trace-rwlock", trace_rwlock) {} else if VG_BOOL_CLO(arg, "--trace-sectsuppr", trace_sectsuppr) {} else if VG_BOOL_CLO(arg, "--trace-segment", trace_segment) {} else if VG_BOOL_CLO(arg, "--trace-semaphore", trace_semaphore) {} else if VG_BOOL_CLO(arg, "--trace-suppr", trace_suppression) {} else if VG_BOOL_CLO(arg, "--var-info", s_var_info) {} else if VG_BOOL_CLO(arg, "--verify-conflict-set", DRD_(verify_conflict_set)) {} else if VG_INT_CLO (arg, "--exclusive-threshold", exclusive_threshold_ms) {} else if VG_STR_CLO (arg, "--ptrace-addr", ptrace_address) {} else if VG_INT_CLO (arg, "--shared-threshold", shared_threshold_ms) {} else if VG_STR_CLO (arg, "--trace-addr", trace_address) {} else return VG_(replacement_malloc_process_cmd_line_option)(arg); if (check_stack_accesses != -1) DRD_(set_check_stack_accesses)(check_stack_accesses); if (exclusive_threshold_ms != -1) { DRD_(mutex_set_lock_threshold)(exclusive_threshold_ms); DRD_(rwlock_set_exclusive_threshold)(exclusive_threshold_ms); } if (first_race_only != -1) { DRD_(set_first_race_only)(first_race_only); } if (join_list_vol != -1) DRD_(thread_set_join_list_vol)(join_list_vol); if (report_signal_unlocked != -1) { DRD_(cond_set_report_signal_unlocked)(report_signal_unlocked); } if (shared_threshold_ms != -1) { DRD_(rwlock_set_shared_threshold)(shared_threshold_ms); } if (segment_merging != -1) DRD_(thread_set_segment_merging)(segment_merging); if (segment_merge_interval != -1) DRD_(thread_set_segment_merge_interval)(segment_merge_interval); if (show_confl_seg != -1) DRD_(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, False); } if (ptrace_address) { HChar *plus = VG_(strchr)(ptrace_address, '+'); Addr addr, length; if (plus) *plus = '\0'; addr = VG_(strtoll16)(ptrace_address, 0); length = plus ? VG_(strtoll16)(plus + 1, 0) : 1; DRD_(start_tracing_address_range)(addr, addr + length, True); } if (trace_barrier != -1) DRD_(barrier_set_trace)(trace_barrier); if (trace_clientobj != -1) DRD_(clientobj_set_trace)(trace_clientobj); if (trace_cond != -1) DRD_(cond_set_trace)(trace_cond); if (trace_csw != -1) DRD_(thread_trace_context_switches)(trace_csw); if (trace_fork_join != -1) DRD_(thread_set_trace_fork_join)(trace_fork_join); if (trace_hb != -1) DRD_(hb_set_trace)(trace_hb); if (trace_conflict_set != -1) DRD_(thread_trace_conflict_set)(trace_conflict_set); if (trace_conflict_set_bm != -1) DRD_(thread_trace_conflict_set_bm)(trace_conflict_set_bm); if (trace_mutex != -1) DRD_(mutex_set_trace)(trace_mutex); if (trace_rwlock != -1) DRD_(rwlock_set_trace)(trace_rwlock); if (trace_segment != -1) DRD_(sg_set_trace)(trace_segment); if (trace_semaphore != -1) DRD_(semaphore_set_trace)(trace_semaphore); if (trace_suppression != -1) DRD_(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= Print an error message if any mutex or\n" " writer lock is held longer than the specified\n" " time (in milliseconds) [off].\n" " --first-race-only=yes|no Only report the first data race that occurs on\n" " a memory location instead of all races [no].\n" " --free-is-write=yes|no Whether to report races between freeing memory\n" " and subsequent accesses of that memory[no].\n" " --join-list-vol= Number of threads to delay cleanup for [10].\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" " --segment-merging-interval= Perform segment merging every time n new\n" " segments have been created. Default: %d.\n" " --shared-threshold= Print an error message if a reader lock\n" " is held longer than the specified time (in\n" " milliseconds) [off]\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" " --ignore-thread-creation=yes|no Ignore activities during thread \n" " creation [%s].\n" "\n" " drd options for monitoring process behavior:\n" " --ptrace-addr=
[+] Trace all load and store activity for\n" " the specified address range and keep doing that\n" " even after the memory at that address has been\n" " freed and reallocated [off].\n" " --trace-addr=
Trace all load and store activity for the\n" " specified address [off].\n" " --trace-alloc=yes|no Trace all memory allocations and deallocations\n" " [no].\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-hb=yes|no Trace ANNOTATE_HAPPENS_BEFORE() etc. [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", DRD_(thread_get_segment_merge_interval)(), DRD_(ignore_thread_creation) ? "yes" : "no" ); } 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-conflict-set-bm=yes|no Trace all conflict set bitmap\n" " updates [no]. Note: enabling this option\n" " will generate a lot of output !\n" " --trace-sectsuppr=yes|no Trace which the dynamic library sections on\n" " which data race detection is suppressed.\n" " --trace-segment=yes|no Trace segment actions [no].\n" " --trace-suppr=yes|no Trace all address suppression actions [no].\n" " --verify-conflict-set=yes|no Verify conflict set consistency [no].\n" ); } // // Implements the thread-related core callbacks. // static void drd_pre_mem_read(const CorePart part, const ThreadId tid, const HChar* const s, const Addr a, const SizeT size) { DRD_(thread_set_vg_running_tid)(VG_(get_running_tid)()); if (size > 0) { DRD_(trace_load)(a, size); } } static void drd_pre_mem_read_asciiz(const CorePart part, const ThreadId tid, const HChar* const s, const Addr a) { const HChar* p = (void*)a; SizeT size = 0; // Don't segfault if the string starts in an obviously stupid // place. Actually we should check the whole string, not just // the start address, but that's too much trouble. At least // checking the first byte is better than nothing. See #255009. if (!VG_(am_is_valid_for_client) (a, 1, VKI_PROT_READ)) return; /* Note: the expression '*p' reads client memory and may crash if the */ /* client provided an invalid pointer ! */ while (*p) { p++; size++; } 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) { DRD_(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, const Bool is_stack_mem) { const Addr a2 = a1 + len; tl_assert(a1 <= a2); if (!is_stack_mem && s_trace_alloc) DRD_(trace_msg)("Started using memory range 0x%lx + %lu%s", a1, len, DRD_(running_thread_inside_pthread_create)() ? " (inside pthread_create())" : ""); if (!is_stack_mem && DRD_(g_free_is_write)) DRD_(thread_stop_using_mem)(a1, a2); if (UNLIKELY(DRD_(any_address_is_traced)())) { DRD_(trace_mem_access)(a1, len, eStart, 0, 0); } if (UNLIKELY(DRD_(running_thread_inside_pthread_create)())) { DRD_(start_suppression)(a1, a2, "pthread_create()"); } } static void drd_start_using_mem_w_ecu(const Addr a1, const SizeT len, UInt ec_uniq) { drd_start_using_mem(a1, len, False); } static void drd_start_using_mem_w_tid(const Addr a1, const SizeT len, ThreadId tid) { drd_start_using_mem(a1, len, False); } 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, 0, 0); if (!is_stack_mem && s_trace_alloc) DRD_(trace_msg)("Stopped using memory range 0x%lx + %lu", a1, len); if (!is_stack_mem || DRD_(get_check_stack_accesses)()) { if (is_stack_mem || !DRD_(g_free_is_write)) DRD_(thread_stop_using_mem)(a1, a2); else if (DRD_(g_free_is_write)) DRD_(trace_store)(a1, len); DRD_(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); } /** * Discard all information DRD has about memory accesses and client objects * in the specified address range. */ void DRD_(clean_memory)(const Addr a1, const SizeT len) { const Bool is_stack_memory = DRD_(thread_address_on_any_stack)(a1); drd_stop_using_mem(a1, len, is_stack_memory); drd_start_using_mem(a1, len, is_stack_memory); } /** * Suppress data race reports on all addresses contained in .plt, .got 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). * Note: the contents of the .got section is only modified by the MIPS resolver. */ static void DRD_(suppress_relocation_conflicts)(const Addr a, const SizeT len) { const DebugInfo* di; if (trace_sectsuppr) VG_(dmsg)("Evaluating range @ 0x%lx size %lu\n", a, len); for (di = VG_(next_DebugInfo)(0); di; di = VG_(next_DebugInfo)(di)) { Addr avma; SizeT size; if (trace_sectsuppr) VG_(dmsg)("Examining %s / %s\n", VG_(DebugInfo_get_filename)(di), VG_(DebugInfo_get_soname)(di)); /* * Suppress the race report on the libpthread global variable * __pthread_multiple_threads. See also * http://bugs.kde.org/show_bug.cgi?id=323905. */ avma = VG_(DebugInfo_get_bss_avma)(di); size = VG_(DebugInfo_get_bss_size)(di); tl_assert((avma && size) || (avma == 0 && size == 0)); if (size > 0 && VG_(strcmp)(VG_(DebugInfo_get_soname)(di), "libpthread.so.0") == 0) { if (trace_sectsuppr) VG_(dmsg)("Suppressing .bss @ 0x%lx size %lu\n", avma, size); tl_assert(VG_(DebugInfo_sect_kind)(NULL, avma) == Vg_SectBSS); DRD_(start_suppression)(avma, avma + size, ".bss"); } avma = VG_(DebugInfo_get_plt_avma)(di); size = VG_(DebugInfo_get_plt_size)(di); tl_assert((avma && size) || (avma == 0 && size == 0)); if (size > 0) { if (trace_sectsuppr) VG_(dmsg)("Suppressing .plt @ 0x%lx size %lu\n", avma, size); tl_assert(VG_(DebugInfo_sect_kind)(NULL, avma) == Vg_SectPLT); DRD_(start_suppression)(avma, avma + size, ".plt"); } avma = VG_(DebugInfo_get_gotplt_avma)(di); size = VG_(DebugInfo_get_gotplt_size)(di); tl_assert((avma && size) || (avma == 0 && size == 0)); if (size > 0) { if (trace_sectsuppr) VG_(dmsg)("Suppressing .got.plt @ 0x%lx size %lu\n", avma, size); tl_assert(VG_(DebugInfo_sect_kind)(NULL, avma) == Vg_SectGOTPLT); DRD_(start_suppression)(avma, avma + size, ".gotplt"); } avma = VG_(DebugInfo_get_got_avma)(di); size = VG_(DebugInfo_get_got_size)(di); tl_assert((avma && size) || (avma == 0 && size == 0)); if (size > 0) { if (trace_sectsuppr) VG_(dmsg)("Suppressing .got @ 0x%lx size %lu\n", avma, size); tl_assert(VG_(DebugInfo_sect_kind)(NULL, avma) == Vg_SectGOT); DRD_(start_suppression)(avma, avma + size, ".got"); } } } 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) { DRD_(thread_set_vg_running_tid)(VG_(get_running_tid)()); drd_start_using_mem(a, len, False); DRD_(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_stack2(const DrdThreadId tid, const Addr a, const SizeT len) { DRD_(thread_set_stack_min)(tid, a - VG_STACK_REDZONE_SZB); drd_start_using_mem(a - VG_STACK_REDZONE_SZB, len + VG_STACK_REDZONE_SZB, True); } static __inline__ void drd_start_using_mem_stack(const Addr a, const SizeT len) { drd_start_using_mem_stack2(DRD_(thread_get_running_tid)(), a, len); } /** * 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_stack2(const DrdThreadId tid, const Addr a, const SizeT len) { DRD_(thread_set_stack_min)(tid, a + len - VG_STACK_REDZONE_SZB); drd_stop_using_mem(a - VG_STACK_REDZONE_SZB, len + VG_STACK_REDZONE_SZB, True); } static __inline__ void drd_stop_using_mem_stack(const Addr a, const SizeT len) { drd_stop_using_mem_stack2(DRD_(thread_get_running_tid)(), a, len); } static Bool on_alt_stack(const Addr a) { ThreadId vg_tid; Addr alt_min; SizeT alt_size; vg_tid = VG_(get_running_tid)(); alt_min = VG_(thread_get_altstack_min)(vg_tid); alt_size = VG_(thread_get_altstack_size)(vg_tid); return (SizeT)(a - alt_min) < alt_size; } static void drd_start_using_mem_alt_stack(const Addr a, const SizeT len) { if (!on_alt_stack(a)) drd_start_using_mem_stack(a, len); } static void drd_stop_using_mem_alt_stack(const Addr a, const SizeT len) { if (!on_alt_stack(a)) drd_stop_using_mem_stack(a, len); } /** * Callback function invoked by the Valgrind core before a signal is delivered. */ static void drd_pre_deliver_signal(const ThreadId vg_tid, const Int sigNo, const Bool alt_stack) { DrdThreadId drd_tid; drd_tid = DRD_(VgThreadIdToDrdThreadId)(vg_tid); DRD_(thread_set_on_alt_stack)(drd_tid, alt_stack); if (alt_stack) { /* * As soon a signal handler has been invoked on the alternate stack, * switch to stack memory handling functions that can handle the * alternate stack. */ VG_(track_new_mem_stack)(drd_start_using_mem_alt_stack); VG_(track_die_mem_stack)(drd_stop_using_mem_alt_stack); } } /** * Callback function invoked by the Valgrind core after a signal is delivered, * at least if the signal handler did not longjmp(). */ static void drd_post_deliver_signal(const ThreadId vg_tid, const Int sigNo) { DrdThreadId drd_tid; drd_tid = DRD_(VgThreadIdToDrdThreadId)(vg_tid); DRD_(thread_set_on_alt_stack)(drd_tid, False); if (DRD_(thread_get_threads_on_alt_stack)() == 0) { VG_(track_new_mem_stack)(drd_start_using_mem_stack); VG_(track_die_mem_stack)(drd_stop_using_mem_stack); } } /** * Callback function called by the Valgrind core before a stack area is * being used by a signal handler. * * @param[in] a Start of address range - VG_STACK_REDZONE_SZB. * @param[in] len Address range length + VG_STACK_REDZONE_SZB. * @param[in] tid Valgrind thread ID for whom the signal frame is being * constructed. */ static void drd_start_using_mem_stack_signal(const Addr a, const SizeT len, ThreadId tid) { DRD_(thread_set_vg_running_tid)(VG_(get_running_tid)()); drd_start_using_mem(a + VG_STACK_REDZONE_SZB, len - VG_STACK_REDZONE_SZB, True); } static void drd_stop_using_mem_stack_signal(Addr a, SizeT len) { drd_stop_using_mem(a + VG_STACK_REDZONE_SZB, len - VG_STACK_REDZONE_SZB, True); } static void drd_pre_thread_create(const ThreadId creator, const ThreadId created) { const DrdThreadId drd_creator = DRD_(VgThreadIdToDrdThreadId)(creator); tl_assert(created != VG_INVALID_THREADID); DRD_(thread_pre_create)(drd_creator, created); if (DRD_(IsValidDrdThreadId)(drd_creator)) { DRD_(thread_new_segment)(drd_creator); } if (DRD_(thread_get_trace_fork_join)()) { DRD_(trace_msg)("drd_pre_thread_create creator = %u, created = %u", drd_creator, created); } } /** * Called by Valgrind's core before any loads or stores are performed on * the context of thread "created". */ static void drd_post_thread_create(const ThreadId vg_created) { DrdThreadId drd_created; Addr stack_max; tl_assert(vg_created != VG_INVALID_THREADID); drd_created = DRD_(thread_post_create)(vg_created); /* Set up red zone before the code in glibc's clone.S is run. */ stack_max = DRD_(thread_get_stack_max)(drd_created); drd_start_using_mem_stack2(drd_created, stack_max, 0); if (DRD_(thread_get_trace_fork_join)()) { DRD_(trace_msg)("drd_post_thread_create created = %u", drd_created); } if (! DRD_(get_check_stack_accesses)()) { DRD_(start_suppression)(DRD_(thread_get_stack_max)(drd_created) - DRD_(thread_get_stack_size)(drd_created), DRD_(thread_get_stack_max)(drd_created), "stack"); } } /* Called after a thread has performed its last memory access. */ static void drd_thread_finished(ThreadId vg_tid) { DrdThreadId drd_tid; /* * Ignore if invoked because thread creation failed. See e.g. * coregrind/m_syswrap/syswrap-amd64-linux.c */ if (VG_(get_running_tid)() != vg_tid) return; drd_tid = DRD_(VgThreadIdToDrdThreadId)(vg_tid); tl_assert(drd_tid != DRD_INVALID_THREADID); if (DRD_(thread_get_trace_fork_join)()) { DRD_(trace_msg)("drd_thread_finished tid = %u%s", drd_tid, DRD_(thread_get_joinable)(drd_tid) ? "" : " (which is a detached thread)"); } if (s_show_stack_usage && !VG_(clo_xml)) { const SizeT stack_size = DRD_(thread_get_stack_size)(drd_tid); const SizeT used_stack = (DRD_(thread_get_stack_max)(drd_tid) - DRD_(thread_get_stack_min_min)(drd_tid)); VG_(message)(Vg_UserMsg, "thread %u%s finished and used %lu bytes out of %lu" " on its stack. Margin: %lu bytes.\n", drd_tid, DRD_(thread_get_joinable)(drd_tid) ? "" : " (which is a detached thread)", used_stack, stack_size, stack_size - used_stack); } drd_stop_using_mem(DRD_(thread_get_stack_min)(drd_tid), DRD_(thread_get_stack_max)(drd_tid) - DRD_(thread_get_stack_min)(drd_tid), True); DRD_(thread_set_record_loads)(drd_tid, False); DRD_(thread_set_record_stores)(drd_tid, False); DRD_(thread_finished)(drd_tid); } /* * Called immediately after fork for the child process only. 'tid' is the * only surviving thread in the child process. Cleans up thread state. * See also http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_atfork.html for a detailed discussion of using fork() in combination with mutexes. */ static void drd__atfork_child(ThreadId tid) { DRD_(drd_thread_atfork_child)(tid); } // // Implementation of the tool interface. // static void DRD_(post_clo_init)(void) { #if defined(VGO_linux) || defined(VGO_darwin) || defined(VGO_solaris) /* fine */ #else VG_(printf)("\nWARNING: DRD has not yet been tested on this operating system.\n\n"); # endif if (s_var_info) { VG_(needs_var_info)(); } } static void drd_start_client_code(const ThreadId tid, const ULong bbs_done) { tl_assert(tid == VG_(get_running_tid)()); DRD_(thread_set_vg_running_tid)(tid); } static void DRD_(fini)(Int exitcode) { // thread_print_all(); if (VG_(clo_verbosity) == 1 && !VG_(clo_xml)) { VG_(message)(Vg_UserMsg, "For counts of detected and suppressed errors, " "rerun with: -v\n"); } if ((VG_(clo_stats) || s_print_stats) && !VG_(clo_xml)) { ULong pu = DRD_(thread_get_update_conflict_set_count)(); ULong pu_seg_cr = DRD_(thread_get_update_conflict_set_new_sg_count)(); ULong pu_mtx_cv = DRD_(thread_get_update_conflict_set_sync_count)(); ULong pu_join = DRD_(thread_get_update_conflict_set_join_count)(); VG_(message)(Vg_UserMsg, " thread: %llu context switches.\n", DRD_(thread_get_context_switch_count)()); VG_(message)(Vg_UserMsg, "confl set: %llu full updates and %llu partial updates;\n", DRD_(thread_get_compute_conflict_set_count)(), pu); VG_(message)(Vg_UserMsg, " %llu partial updates during segment creation,\n", pu_seg_cr); VG_(message)(Vg_UserMsg, " %llu because of mutex/sema/cond.var. operations,\n", pu_mtx_cv); VG_(message)(Vg_UserMsg, " %llu because of barrier/rwlock operations and\n", pu - pu_seg_cr - pu_mtx_cv - pu_join); VG_(message)(Vg_UserMsg, " %llu partial updates because of thread join" " operations.\n", pu_join); VG_(message)(Vg_UserMsg, " segments: created %llu segments, max %llu alive,\n", DRD_(sg_get_segments_created_count)(), DRD_(sg_get_max_segments_alive_count)()); VG_(message)(Vg_UserMsg, " %llu discard points and %llu merges.\n", DRD_(thread_get_discard_ordered_segments_count)(), DRD_(sg_get_segment_merge_count)()); VG_(message)(Vg_UserMsg, "segmnt cr: %llu mutex, %llu rwlock, %llu semaphore and" " %llu barrier.\n", DRD_(get_mutex_segment_creation_count)(), DRD_(get_rwlock_segment_creation_count)(), DRD_(get_semaphore_segment_creation_count)(), DRD_(get_barrier_segment_creation_count)()); VG_(message)(Vg_UserMsg, " bitmaps: %llu level one" " and %llu level two bitmaps were allocated.\n", DRD_(bm_get_bitmap_creation_count)(), DRD_(bm_get_bitmap2_creation_count)()); VG_(message)(Vg_UserMsg, " mutex: %llu non-recursive lock/unlock events.\n", DRD_(get_mutex_lock_count)()); DRD_(print_malloc_stats)(); } DRD_(bm_module_cleanup)(); } 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) 2006-2017, 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)); VG_(needs_xml_output) (); // 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_pre_deliver_signal) (drd_pre_deliver_signal); VG_(track_post_deliver_signal) (drd_post_deliver_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); VG_(atfork) (NULL/*pre*/, NULL/*parent*/, drd__atfork_child/*child*/); // Other stuff. DRD_(register_malloc_wrappers)(drd_start_using_mem_w_ecu, drd_stop_using_nonstack_mem); DRD_(bm_module_init)(); DRD_(clientreq_init)(); DRD_(suppression_init)(); DRD_(clientobj_init)(); DRD_(thread_init)(); { HChar* const smi = VG_(getenv)("DRD_SEGMENT_MERGING_INTERVAL"); if (smi) DRD_(thread_set_segment_merge_interval)(VG_(strtoll10)(smi, NULL)); } if (VG_(getenv)("DRD_VERIFY_CONFLICT_SET")) DRD_(verify_conflict_set) = True; } VG_DETERMINE_INTERFACE_VERSION(drd_pre_clo_init)