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ftmemsim-valgrind/coregrind/vg_main.c
Dirk Mueller f0b609cf65 test for PARENT_SETTID support in clone() of the kernel instead 
of testing for presence of NPTL by assuming that sys_futex is only
implemented when its a NPTL patched kernel.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2061
2003-11-27 02:16:41 +00:00

2079 lines
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/*--------------------------------------------------------------------*/
/*--- C startup stuff, reached from vg_startup.S. ---*/
/*--- vg_main.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, an extensible x86 protected-mode
emulator for monitoring program execution on x86-Unixes.
Copyright (C) 2000-2003 Julian Seward
jseward@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.
*/
#include "vg_include.h"
/* ---------------------------------------------------------------------
Compute offsets into baseBlock. See comments in vg_include.h.
------------------------------------------------------------------ */
/* The variables storing offsets. */
#define INVALID_OFFSET (-1)
Int VGOFF_(m_eax) = INVALID_OFFSET;
Int VGOFF_(m_ecx) = INVALID_OFFSET;
Int VGOFF_(m_edx) = INVALID_OFFSET;
Int VGOFF_(m_ebx) = INVALID_OFFSET;
Int VGOFF_(m_esp) = INVALID_OFFSET;
Int VGOFF_(m_ebp) = INVALID_OFFSET;
Int VGOFF_(m_esi) = INVALID_OFFSET;
Int VGOFF_(m_edi) = INVALID_OFFSET;
Int VGOFF_(m_eflags) = INVALID_OFFSET;
Int VGOFF_(m_dflag) = INVALID_OFFSET;
Int VGOFF_(m_ssestate) = INVALID_OFFSET;
Int VGOFF_(ldt) = INVALID_OFFSET;
Int VGOFF_(m_cs) = INVALID_OFFSET;
Int VGOFF_(m_ss) = INVALID_OFFSET;
Int VGOFF_(m_ds) = INVALID_OFFSET;
Int VGOFF_(m_es) = INVALID_OFFSET;
Int VGOFF_(m_fs) = INVALID_OFFSET;
Int VGOFF_(m_gs) = INVALID_OFFSET;
Int VGOFF_(m_eip) = INVALID_OFFSET;
Int VGOFF_(spillslots) = INVALID_OFFSET;
Int VGOFF_(sh_eax) = INVALID_OFFSET;
Int VGOFF_(sh_ecx) = INVALID_OFFSET;
Int VGOFF_(sh_edx) = INVALID_OFFSET;
Int VGOFF_(sh_ebx) = INVALID_OFFSET;
Int VGOFF_(sh_esp) = INVALID_OFFSET;
Int VGOFF_(sh_ebp) = INVALID_OFFSET;
Int VGOFF_(sh_esi) = INVALID_OFFSET;
Int VGOFF_(sh_edi) = INVALID_OFFSET;
Int VGOFF_(sh_eflags) = INVALID_OFFSET;
Int VGOFF_(helper_idiv_64_32) = INVALID_OFFSET;
Int VGOFF_(helper_div_64_32) = INVALID_OFFSET;
Int VGOFF_(helper_idiv_32_16) = INVALID_OFFSET;
Int VGOFF_(helper_div_32_16) = INVALID_OFFSET;
Int VGOFF_(helper_idiv_16_8) = INVALID_OFFSET;
Int VGOFF_(helper_div_16_8) = INVALID_OFFSET;
Int VGOFF_(helper_imul_32_64) = INVALID_OFFSET;
Int VGOFF_(helper_mul_32_64) = INVALID_OFFSET;
Int VGOFF_(helper_imul_16_32) = INVALID_OFFSET;
Int VGOFF_(helper_mul_16_32) = INVALID_OFFSET;
Int VGOFF_(helper_imul_8_16) = INVALID_OFFSET;
Int VGOFF_(helper_mul_8_16) = INVALID_OFFSET;
Int VGOFF_(helper_CLD) = INVALID_OFFSET;
Int VGOFF_(helper_STD) = INVALID_OFFSET;
Int VGOFF_(helper_get_dirflag) = INVALID_OFFSET;
Int VGOFF_(helper_CLC) = INVALID_OFFSET;
Int VGOFF_(helper_STC) = INVALID_OFFSET;
Int VGOFF_(helper_shldl) = INVALID_OFFSET;
Int VGOFF_(helper_shldw) = INVALID_OFFSET;
Int VGOFF_(helper_shrdl) = INVALID_OFFSET;
Int VGOFF_(helper_shrdw) = INVALID_OFFSET;
Int VGOFF_(helper_IN) = INVALID_OFFSET;
Int VGOFF_(helper_OUT) = INVALID_OFFSET;
Int VGOFF_(helper_RDTSC) = INVALID_OFFSET;
Int VGOFF_(helper_CPUID) = INVALID_OFFSET;
Int VGOFF_(helper_BSWAP) = INVALID_OFFSET;
Int VGOFF_(helper_bsf) = INVALID_OFFSET;
Int VGOFF_(helper_bsr) = INVALID_OFFSET;
Int VGOFF_(helper_fstsw_AX) = INVALID_OFFSET;
Int VGOFF_(helper_SAHF) = INVALID_OFFSET;
Int VGOFF_(helper_LAHF) = INVALID_OFFSET;
Int VGOFF_(helper_DAS) = INVALID_OFFSET;
Int VGOFF_(helper_DAA) = INVALID_OFFSET;
Int VGOFF_(helper_undefined_instruction) = INVALID_OFFSET;
/* MAX_NONCOMPACT_HELPERS can be increased easily. If MAX_COMPACT_HELPERS is
* increased too much, they won't really be compact any more... */
#define MAX_COMPACT_HELPERS 8
#define MAX_NONCOMPACT_HELPERS 50
UInt VG_(n_compact_helpers) = 0;
UInt VG_(n_noncompact_helpers) = 0;
Addr VG_(compact_helper_addrs) [MAX_COMPACT_HELPERS];
Int VG_(compact_helper_offsets)[MAX_COMPACT_HELPERS];
Addr VG_(noncompact_helper_addrs) [MAX_NONCOMPACT_HELPERS];
Int VG_(noncompact_helper_offsets)[MAX_NONCOMPACT_HELPERS];
/* This is the actual defn of baseblock. */
UInt VG_(baseBlock)[VG_BASEBLOCK_WORDS];
/* PID of the main thread */
Int VG_(main_pid);
/* PGRP of process */
Int VG_(main_pgrp);
/* Words. */
static Int baB_off = 0;
/* jmp_buf for fatal signals */
Int VG_(fatal_sigNo) = -1;
Bool VG_(fatal_signal_set) = False;
jmp_buf VG_(fatal_signal_jmpbuf);
/* Returns the offset, in words. */
static Int alloc_BaB ( Int words )
{
Int off = baB_off;
baB_off += words;
if (baB_off >= VG_BASEBLOCK_WORDS)
VG_(core_panic)( "alloc_BaB: baseBlock is too small");
return off;
}
/* Align offset, in *bytes* */
static void align_BaB ( UInt align )
{
vg_assert(2 == align || 4 == align || 8 == align || 16 == align);
baB_off += (align-1);
baB_off &= ~(align-1);
}
/* Allocate 1 word in baseBlock and set it to the given value. */
static Int alloc_BaB_1_set ( Addr a )
{
Int off = alloc_BaB(1);
VG_(baseBlock)[off] = (UInt)a;
return off;
}
/* Registers a function in compact_helper_addrs; compact_helper_offsets is
filled in later. */
void VG_(register_compact_helper)(Addr a)
{
if (MAX_COMPACT_HELPERS <= VG_(n_compact_helpers)) {
VG_(printf)("Can only register %d compact helpers\n",
MAX_COMPACT_HELPERS);
VG_(core_panic)("Too many compact helpers registered");
}
VG_(compact_helper_addrs)[VG_(n_compact_helpers)] = a;
VG_(n_compact_helpers)++;
}
/* Registers a function in noncompact_helper_addrs; noncompact_helper_offsets
* is filled in later.
*/
void VG_(register_noncompact_helper)(Addr a)
{
if (MAX_NONCOMPACT_HELPERS <= VG_(n_noncompact_helpers)) {
VG_(printf)("Can only register %d non-compact helpers\n",
MAX_NONCOMPACT_HELPERS);
VG_(printf)("Try increasing MAX_NON_COMPACT_HELPERS\n");
VG_(core_panic)("Too many non-compact helpers registered");
}
VG_(noncompact_helper_addrs)[VG_(n_noncompact_helpers)] = a;
VG_(n_noncompact_helpers)++;
}
/* Allocate offsets in baseBlock for the skin helpers */
static
void assign_helpers_in_baseBlock(UInt n, Int offsets[], Addr addrs[])
{
UInt i;
for (i = 0; i < n; i++)
offsets[i] = alloc_BaB_1_set( addrs[i] );
}
Bool VG_(need_to_handle_esp_assignment)(void)
{
return ( VG_(track_events).new_mem_stack_4 ||
VG_(track_events).die_mem_stack_4 ||
VG_(track_events).new_mem_stack_8 ||
VG_(track_events).die_mem_stack_8 ||
VG_(track_events).new_mem_stack_12 ||
VG_(track_events).die_mem_stack_12 ||
VG_(track_events).new_mem_stack_16 ||
VG_(track_events).die_mem_stack_16 ||
VG_(track_events).new_mem_stack_32 ||
VG_(track_events).die_mem_stack_32 ||
VG_(track_events).new_mem_stack ||
VG_(track_events).die_mem_stack
);
}
/* Here we assign actual offsets. It's important to get the most
popular referents within 128 bytes of the start, so we can take
advantage of short addressing modes relative to %ebp. Popularity
of offsets was measured on 22 Feb 02 running a KDE application, and
the slots rearranged accordingly, with a 1.5% reduction in total
size of translations. */
static void vg_init_baseBlock ( void )
{
/* Those with offsets under 128 are carefully chosen. */
/* WORD offsets in this column */
/* 0 */ VGOFF_(m_eax) = alloc_BaB(1);
/* 1 */ VGOFF_(m_ecx) = alloc_BaB(1);
/* 2 */ VGOFF_(m_edx) = alloc_BaB(1);
/* 3 */ VGOFF_(m_ebx) = alloc_BaB(1);
/* 4 */ VGOFF_(m_esp) = alloc_BaB(1);
/* 5 */ VGOFF_(m_ebp) = alloc_BaB(1);
/* 6 */ VGOFF_(m_esi) = alloc_BaB(1);
/* 7 */ VGOFF_(m_edi) = alloc_BaB(1);
/* 8 */ VGOFF_(m_eflags) = alloc_BaB(1);
if (VG_(needs).shadow_regs) {
/* 9 */ VGOFF_(sh_eax) = alloc_BaB(1);
/* 10 */ VGOFF_(sh_ecx) = alloc_BaB(1);
/* 11 */ VGOFF_(sh_edx) = alloc_BaB(1);
/* 12 */ VGOFF_(sh_ebx) = alloc_BaB(1);
/* 13 */ VGOFF_(sh_esp) = alloc_BaB(1);
/* 14 */ VGOFF_(sh_ebp) = alloc_BaB(1);
/* 15 */ VGOFF_(sh_esi) = alloc_BaB(1);
/* 16 */ VGOFF_(sh_edi) = alloc_BaB(1);
/* 17 */ VGOFF_(sh_eflags) = alloc_BaB(1);
}
/* 9,10,11 or 18,19,20... depends on number whether shadow regs are used
* and on compact helpers registered */
/* Make these most-frequently-called specialised ones compact, if they
are used. */
if (VG_(track_events).new_mem_stack_4)
VG_(register_compact_helper)( (Addr) VG_(track_events).new_mem_stack_4);
if (VG_(track_events).die_mem_stack_4)
VG_(register_compact_helper)( (Addr) VG_(track_events).die_mem_stack_4);
/* (9 or 18) + n_compact_helpers */
/* Allocate slots for compact helpers */
assign_helpers_in_baseBlock(VG_(n_compact_helpers),
VG_(compact_helper_offsets),
VG_(compact_helper_addrs));
/* (9/10 or 18/19) + n_compact_helpers */
VGOFF_(m_eip) = alloc_BaB(1);
/* There are currently 24 spill slots */
/* (11+/20+ .. 32+/43+) + n_compact_helpers. This can overlap the magic
* boundary at >= 32 words, but most spills are to low numbered spill
* slots, so the ones above the boundary don't see much action. */
VGOFF_(spillslots) = alloc_BaB(VG_MAX_SPILLSLOTS);
/* I gave up counting at this point. Since they're above the
short-amode-boundary, there's no point. */
VGOFF_(m_dflag) = alloc_BaB(1);
/* The FPU/SSE state. This _must_ be 16-byte aligned. */
align_BaB(16);
VGOFF_(m_ssestate) = alloc_BaB(VG_SIZE_OF_SSESTATE_W);
vg_assert(
( ((UInt)(& VG_(baseBlock)[VGOFF_(m_ssestate)]))
% 16 )
== 0
);
/* This thread's LDT pointer, and segment registers. */
VGOFF_(ldt) = alloc_BaB(1);
VGOFF_(m_cs) = alloc_BaB(1);
VGOFF_(m_ss) = alloc_BaB(1);
VGOFF_(m_ds) = alloc_BaB(1);
VGOFF_(m_es) = alloc_BaB(1);
VGOFF_(m_fs) = alloc_BaB(1);
VGOFF_(m_gs) = alloc_BaB(1);
VG_(register_noncompact_helper)( (Addr) & VG_(do_useseg) );
#define REG(kind, size) \
if (VG_(track_events).kind##_mem_stack##size) \
VG_(register_noncompact_helper)( \
(Addr) VG_(track_events).kind##_mem_stack##size );
REG(new, _8);
REG(new, _12);
REG(new, _16);
REG(new, _32);
REG(new, );
REG(die, _8);
REG(die, _12);
REG(die, _16);
REG(die, _32);
REG(die, );
#undef REG
if (VG_(need_to_handle_esp_assignment)())
VG_(register_noncompact_helper)((Addr) VG_(unknown_esp_update));
/* Helper functions. */
VGOFF_(helper_idiv_64_32)
= alloc_BaB_1_set( (Addr) & VG_(helper_idiv_64_32));
VGOFF_(helper_div_64_32)
= alloc_BaB_1_set( (Addr) & VG_(helper_div_64_32));
VGOFF_(helper_idiv_32_16)
= alloc_BaB_1_set( (Addr) & VG_(helper_idiv_32_16));
VGOFF_(helper_div_32_16)
= alloc_BaB_1_set( (Addr) & VG_(helper_div_32_16));
VGOFF_(helper_idiv_16_8)
= alloc_BaB_1_set( (Addr) & VG_(helper_idiv_16_8));
VGOFF_(helper_div_16_8)
= alloc_BaB_1_set( (Addr) & VG_(helper_div_16_8));
VGOFF_(helper_imul_32_64)
= alloc_BaB_1_set( (Addr) & VG_(helper_imul_32_64));
VGOFF_(helper_mul_32_64)
= alloc_BaB_1_set( (Addr) & VG_(helper_mul_32_64));
VGOFF_(helper_imul_16_32)
= alloc_BaB_1_set( (Addr) & VG_(helper_imul_16_32));
VGOFF_(helper_mul_16_32)
= alloc_BaB_1_set( (Addr) & VG_(helper_mul_16_32));
VGOFF_(helper_imul_8_16)
= alloc_BaB_1_set( (Addr) & VG_(helper_imul_8_16));
VGOFF_(helper_mul_8_16)
= alloc_BaB_1_set( (Addr) & VG_(helper_mul_8_16));
VGOFF_(helper_CLD)
= alloc_BaB_1_set( (Addr) & VG_(helper_CLD));
VGOFF_(helper_STD)
= alloc_BaB_1_set( (Addr) & VG_(helper_STD));
VGOFF_(helper_get_dirflag)
= alloc_BaB_1_set( (Addr) & VG_(helper_get_dirflag));
VGOFF_(helper_CLC)
= alloc_BaB_1_set( (Addr) & VG_(helper_CLC));
VGOFF_(helper_STC)
= alloc_BaB_1_set( (Addr) & VG_(helper_STC));
VGOFF_(helper_shldl)
= alloc_BaB_1_set( (Addr) & VG_(helper_shldl));
VGOFF_(helper_shldw)
= alloc_BaB_1_set( (Addr) & VG_(helper_shldw));
VGOFF_(helper_shrdl)
= alloc_BaB_1_set( (Addr) & VG_(helper_shrdl));
VGOFF_(helper_shrdw)
= alloc_BaB_1_set( (Addr) & VG_(helper_shrdw));
VGOFF_(helper_RDTSC)
= alloc_BaB_1_set( (Addr) & VG_(helper_RDTSC));
VGOFF_(helper_CPUID)
= alloc_BaB_1_set( (Addr) & VG_(helper_CPUID));
VGOFF_(helper_bsf)
= alloc_BaB_1_set( (Addr) & VG_(helper_bsf));
VGOFF_(helper_bsr)
= alloc_BaB_1_set( (Addr) & VG_(helper_bsr));
VGOFF_(helper_fstsw_AX)
= alloc_BaB_1_set( (Addr) & VG_(helper_fstsw_AX));
VGOFF_(helper_SAHF)
= alloc_BaB_1_set( (Addr) & VG_(helper_SAHF));
VGOFF_(helper_LAHF)
= alloc_BaB_1_set( (Addr) & VG_(helper_LAHF));
VGOFF_(helper_DAS)
= alloc_BaB_1_set( (Addr) & VG_(helper_DAS));
VGOFF_(helper_DAA)
= alloc_BaB_1_set( (Addr) & VG_(helper_DAA));
VGOFF_(helper_IN)
= alloc_BaB_1_set( (Addr) & VG_(helper_IN));
VGOFF_(helper_OUT)
= alloc_BaB_1_set( (Addr) & VG_(helper_OUT));
VGOFF_(helper_undefined_instruction)
= alloc_BaB_1_set( (Addr) & VG_(helper_undefined_instruction));
/* Allocate slots for noncompact helpers */
assign_helpers_in_baseBlock(VG_(n_noncompact_helpers),
VG_(noncompact_helper_offsets),
VG_(noncompact_helper_addrs));
/* Initialise slots that require it */
VG_(copy_m_state_static_to_baseBlock)();
/* Pretend the root thread has a completely empty LDT to start with. */
VG_(baseBlock)[VGOFF_(ldt)] = (UInt)NULL;
/* Initialise shadow regs */
if (VG_(needs).shadow_regs) {
VG_(baseBlock)[VGOFF_(sh_esp)] =
VG_(baseBlock)[VGOFF_(sh_ebp)] =
VG_(baseBlock)[VGOFF_(sh_eax)] =
VG_(baseBlock)[VGOFF_(sh_ecx)] =
VG_(baseBlock)[VGOFF_(sh_edx)] =
VG_(baseBlock)[VGOFF_(sh_ebx)] =
VG_(baseBlock)[VGOFF_(sh_esi)] =
VG_(baseBlock)[VGOFF_(sh_edi)] = 0;
VG_(baseBlock)[VGOFF_(sh_eflags)] = 0;
VG_TRACK( post_regs_write_init );
}
}
/* ---------------------------------------------------------------------
Global entities which are not referenced from generated code.
------------------------------------------------------------------ */
/* The stack on which Valgrind runs. We can't use the same stack as
the simulatee -- that's an important design decision. */
UInt VG_(stack)[VG_STACK_SIZE_W];
/* Ditto our signal delivery stack. */
UInt VG_(sigstack)[VG_SIGSTACK_SIZE_W];
/* Saving stuff across system calls. */
__attribute__ ((aligned (16)))
UInt VG_(real_sse_state_saved_over_syscall)[VG_SIZE_OF_SSESTATE_W];
Addr VG_(esp_saved_over_syscall);
/* Counts downwards in vg_run_innerloop. */
UInt VG_(dispatch_ctr);
/* 64-bit counter for the number of basic blocks done. */
ULong VG_(bbs_done);
/* 64-bit counter for the number of bbs to go before a debug exit. */
ULong VG_(bbs_to_go);
/* This is the ThreadId of the last thread the scheduler ran. */
ThreadId VG_(last_run_tid) = 0;
/* This is the argument to __NR_exit() supplied by the first thread to
call that syscall. We eventually pass that to __NR_exit() for
real. */
Int VG_(exitcode) = 0;
/* Tell the logging mechanism whether we are logging to a file
descriptor or a socket descriptor. */
Bool VG_(logging_to_filedes) = True;
/* Is this a SSE/SSE2-capable CPU? If so, we had better save/restore
the SSE state all over the place. This is set up very early, in
vg_startup.S. We have to determine it early since we can't even
correctly snapshot the startup machine state without it. */
/* Initially True. Safer to err on the side of SSEness and get SIGILL
than to not notice for some reason that we have SSE and get weird
errors later on. */
Bool VG_(have_ssestate) = True;
/* ---------------------------------------------------------------------
Counters, for informational purposes only.
------------------------------------------------------------------ */
/* Number of lookups which miss the fast tt helper. */
UInt VG_(tt_fast_misses) = 0;
/* Counts for TT/TC informational messages. */
/* Number and total o/t size of translations overall. */
UInt VG_(overall_in_count) = 0;
UInt VG_(overall_in_osize) = 0;
UInt VG_(overall_in_tsize) = 0;
/* Number and total o/t size of discards overall. */
UInt VG_(overall_out_count) = 0;
UInt VG_(overall_out_osize) = 0;
UInt VG_(overall_out_tsize) = 0;
/* The number of discards of TT/TC. */
UInt VG_(number_of_tc_discards) = 0;
/* Counts of chain and unchain operations done. */
UInt VG_(bb_enchain_count) = 0;
UInt VG_(bb_dechain_count) = 0;
/* Number of unchained jumps performed. */
UInt VG_(unchained_jumps_done) = 0;
/* Counts pertaining to the register allocator. */
/* total number of uinstrs input to reg-alloc */
UInt VG_(uinstrs_prealloc) = 0;
/* total number of uinstrs added due to spill code */
UInt VG_(uinstrs_spill) = 0;
/* number of bbs requiring spill code */
UInt VG_(translations_needing_spill) = 0;
/* total of register ranks over all translations */
UInt VG_(total_reg_rank) = 0;
/* Counts pertaining to internal sanity checking. */
UInt VG_(sanity_fast_count) = 0;
UInt VG_(sanity_slow_count) = 0;
/* Counts pertaining to the scheduler. */
UInt VG_(num_scheduling_events_MINOR) = 0;
UInt VG_(num_scheduling_events_MAJOR) = 0;
/* ---------------------------------------------------------------------
Values derived from command-line options.
------------------------------------------------------------------ */
/* Define, and set defaults. */
Bool VG_(clo_error_limit) = True;
Bool VG_(clo_GDB_attach) = False;
Char* VG_(clo_GDB_path) = GDB_PATH;
Bool VG_(clo_gen_suppressions) = False;
Int VG_(sanity_level) = 1;
Int VG_(clo_verbosity) = 1;
Bool VG_(clo_demangle) = True;
Bool VG_(clo_trace_children) = False;
/* See big comment in vg_include.h for meaning of these three.
fd is initially stdout, for --help, but gets moved to stderr by default
immediately afterwards. */
VgLogTo VG_(clo_log_to) = VgLogTo_Fd;
Int VG_(clo_logfile_fd) = 1;
Char* VG_(clo_logfile_name) = NULL;
Int VG_(clo_input_fd) = 0; /* stdin */
Int VG_(clo_n_suppressions) = 0;
Char* VG_(clo_suppressions)[VG_CLO_MAX_SFILES];
Bool VG_(clo_profile) = False;
Bool VG_(clo_single_step) = False;
Bool VG_(clo_optimise) = True;
UChar VG_(clo_trace_codegen) = 0; // 00000000b
Bool VG_(clo_trace_syscalls) = False;
Bool VG_(clo_trace_signals) = False;
Bool VG_(clo_trace_symtab) = False;
Bool VG_(clo_trace_sched) = False;
Int VG_(clo_trace_pthread_level) = 0;
ULong VG_(clo_stop_after) = 1000000000000000LL;
Int VG_(clo_dump_error) = 0;
Int VG_(clo_backtrace_size) = 4;
Char* VG_(clo_weird_hacks) = NULL;
Bool VG_(clo_run_libc_freeres) = True;
Bool VG_(clo_track_fds) = False;
Bool VG_(clo_chain_bb) = True;
Bool VG_(clo_show_below_main) = False;
static Bool VG_(clo_wait_for_gdb) = False;
/* If we're doing signal routing, poll for signals every 50mS by
default. */
Int VG_(clo_signal_polltime) = 50;
/* These flags reduce thread wakeup latency on syscall completion and
signal delivery, respectively. The downside is possible unfairness. */
Bool VG_(clo_lowlat_syscalls) = False; /* low-latency syscalls */
Bool VG_(clo_lowlat_signals) = False; /* low-latency signals */
/* This Bool is needed by wrappers in vg_clientmalloc.c to decide how
to behave. Initially we say False. */
Bool VG_(running_on_simd_CPU) = False;
/* Holds client's %esp at the point we gained control. */
Addr VG_(esp_at_startup);
/* Indicates presence, and holds address of client's sysinfo page, a
feature of some modern kernels used to provide vsyscalls, etc. */
Bool VG_(sysinfo_page_exists) = False;
Addr VG_(sysinfo_page_addr) = 0;
/* As deduced from VG_(esp_at_startup), the client's argc, argv[] and
envp[] as extracted from the client's stack at startup-time. */
Int VG_(client_argc);
Char** VG_(client_argv);
Char** VG_(client_envp);
/* A place into which to copy the value of env var VG_ARGS, so we
don't have to modify the original. */
static Char vg_cmdline_copy[M_VG_CMDLINE_STRLEN];
/* ---------------------------------------------------------------------
Processing of command-line options.
------------------------------------------------------------------ */
void VG_(bad_option) ( Char* opt )
{
VG_(shutdown_logging)();
VG_(clo_log_to) = VgLogTo_Fd;
VG_(clo_logfile_fd) = 2; /* stderr */
VG_(printf)("valgrind.so: Bad option `%s'; aborting.\n", opt);
VG_(exit)(1);
}
static void config_error ( Char* msg )
{
VG_(shutdown_logging)();
VG_(clo_log_to) = VgLogTo_Fd;
VG_(clo_logfile_fd) = 2; /* stderr */
VG_(printf)(
"valgrind.so: Startup or configuration error:\n %s\n", msg);
VG_(printf)(
"valgrind.so: Unable to start up properly. Giving up.\n");
VG_(exit)(1);
}
static void args_grok_error ( Char* msg )
{
VG_(shutdown_logging)();
VG_(clo_log_to) = VgLogTo_Fd;
VG_(clo_logfile_fd) = 2; /* stderr */
VG_(printf)("valgrind.so: When searching for "
"client's argc/argc/envp:\n\t%s\n", msg);
config_error("couldn't find client's argc/argc/envp");
}
static void usage ( void )
{
Char* usage1 =
"usage: valgrind [options] prog-and-args\n"
"\n"
" core user options, with defaults in [ ], are:\n"
" --tool=<name> Use the Valgrind tool named <name> [memcheck]\n"
" --help show this message\n"
" --version show version\n"
" -q --quiet run silently; only print error msgs\n"
" -v --verbose be more verbose, incl counts of errors\n"
" --trace-children=no|yes Valgrind-ise child processes? [no]\n"
" --logfile-fd=<number> file descriptor for messages [2=stderr]\n"
" --logfile=<file> log messages to <file>.pid<pid>\n"
" --logsocket=ipaddr:port log messages to socket ipaddr:port\n"
" --demangle=no|yes automatically demangle C++ names? [yes]\n"
" --num-callers=<number> show <num> callers in stack traces [4]\n"
" --error-limit=no|yes stop showing new errors if too many? [yes]\n"
" --show-below-main=no|yes continue stack traces below main() [no]\n"
" --suppressions=<filename> suppress errors described in <filename>\n"
" --gen-suppressions=no|yes print suppressions for errors detected [no]\n"
" --track-fds=no|yes Track open file descriptors? [no]\n"
" --gdb-attach=no|yes start GDB when errors detected? [no]\n"
" --gdb-path=/path/to/gdb path to the GDB to use [/usr/bin/gdb]\n"
" --input-fd=<number> file descriptor for (gdb) input [0=stdin]\n"
" --run-libc-freeres=no|yes Free up glibc memory at exit? [yes]\n"
" --weird-hacks=hack1,hack2,... [none]\n"
" recognised hacks are: ioctl-VTIME truncate-writes lax-ioctls\n"
" --signal-polltime=<time> time, in mS, we should poll for signals.\n"
" Only applies for older kernels which need\n"
" signal routing [50]\n"
" --lowlat-signals=no|yes improve wake-up latency when a thread receives\n"
" a signal [no]\n"
" --lowlat-syscalls=no|yes improve wake-up latency when a thread's\n"
" syscall completes [no]\n"
"\n"
" %s tool user options:\n";
Char* usage2 =
"\n"
" core options for debugging Valgrind itself are:\n"
" --sanity-level=<number> level of sanity checking to do [1]\n"
" --single-step=no|yes translate each instr separately? [no]\n"
" --optimise=no|yes improve intermediate code? [yes]\n"
" --profile=no|yes profile? (tool must be built for it) [no]\n"
" --chain-bb=no|yes do basic-block chaining? [yes]\n"
" --trace-codegen=<XXXXX> show generated code? (X = 0|1) [00000]\n"
" --trace-syscalls=no|yes show all system calls? [no]\n"
" --trace-signals=no|yes show signal handling details? [no]\n"
" --trace-symtab=no|yes show symbol table details? [no]\n"
" --trace-sched=no|yes show thread scheduler details? [no]\n"
" --trace-pthread=none|some|all show pthread event details? [none]\n"
" --stop-after=<number> switch to real CPU after executing\n"
" <number> basic blocks [infinity]\n"
" --dump-error=<number> show translation for basic block\n"
" associated with <number>'th\n"
" error context [0=don't show any]\n"
" --wait-for-gdb=yes|no pause on startup to wait for gdb attach\n"
"\n"
" %s tool debugging options:\n";
Char* usage3 =
"\n"
" Extra options are read from env variable $VALGRIND_OPTS\n"
"\n"
" Valgrind is Copyright (C) 2000-2003 Julian Seward\n"
" and licensed under the GNU General Public License, version 2.\n"
" Bug reports, feedback, admiration, abuse, etc, to: %s.\n"
"\n"
" Tools are copyright and licensed by their authors. See each\n"
" tool's start-up message for more information.\n"
"\n";
VG_(printf)(usage1, VG_(details).name);
/* Don't print skin string directly for security, ha! */
if (VG_(needs).command_line_options)
SK_(print_usage)();
else
VG_(printf)(" (none)\n");
VG_(printf)(usage2, VG_(details).name);
if (VG_(needs).command_line_options)
SK_(print_debug_usage)();
else
VG_(printf)(" (none)\n");
VG_(printf)(usage3, VG_BUGS_TO);
VG_(shutdown_logging)();
VG_(clo_log_to) = VgLogTo_Fd;
VG_(clo_logfile_fd) = 2; /* stderr */
VG_(exit)(1);
}
/* Callback for looking for the stack segment. */
Addr VG_(foundstack_start) = (Addr)NULL;
UInt VG_(foundstack_size) = 0;
static void vg_findstack_callback ( Addr start, UInt size,
Char r, Char w, Char x,
UInt foffset, UChar* filename )
{
Addr lastword;
if (size == 0) return;
if (r != 'r' || w != 'w'
/* || x != 'x' --not necessarily so on x86-64*/
) return;
lastword = start + size - 4;
if (start <= VG_(esp_at_startup)
&& VG_(esp_at_startup) <= lastword) {
VG_(foundstack_start) = start;
VG_(foundstack_size) = size;
vg_assert(VG_(foundstack_size) > 0);
}
}
static void process_cmd_line_options ( void )
{
Char* argv[M_VG_CMDLINE_OPTS];
Int argc;
Char* p;
Char* str;
Int i, eventually_logfile_fd, ctr;
# define ISSPACE(cc) ((cc) == ' ' || (cc) == '\t' || (cc) == '\n')
/* log to stderr by default, but usage message goes to stdout */
eventually_logfile_fd = 2;
/* Once logging is started, we can safely send messages pertaining
to failures in initialisation. */
VG_(startup_logging)();
/* Check for sane path in ./configure --prefix=... */
if (VG_(strlen)(VG_LIBDIR) < 1
|| VG_LIBDIR[0] != '/')
config_error("Please use absolute paths in "
"./configure --prefix=... or --libdir=...");
/* (Suggested by Fabrice Bellard ... )
We look for the Linux ELF table and go down until we find the
envc & envp. It is not fool-proof, but these structures should
change less often than the libc ones. */
{
Int* sp;
/* Look for the stack segment by parsing /proc/self/maps and
looking for a section bracketing VG_(esp_at_startup) which
has rwx permissions and no associated file. Note that this uses
the /proc/self/maps contents read at the start of VG_(main)(),
and doesn't re-read /proc/self/maps. */
VG_(parse_procselfmaps)( vg_findstack_callback );
/* Now foundstack_start and foundstack_size should delimit the stack. */
if (VG_(foundstack_size) == 0) {
args_grok_error("Cannot determine stack segment "
"from /proc/self/maps");
}
if (0)
VG_(printf)("stack segment is %p .. %p\n",
VG_(foundstack_start),
VG_(foundstack_start) + VG_(foundstack_size) - 4 );
sp = (UInt*)(VG_(foundstack_start) + VG_(foundstack_size) );
if ((((UInt)(sp)) % VKI_BYTES_PER_PAGE) != 0) {
args_grok_error("Stack segment is not page aligned?!");
}
/* we locate: NEW_AUX_ENT(1, AT_PAGESZ, ELF_EXEC_PAGESIZE) in
the elf interpreter table */
sp -= 2;
while (sp[0] != VKI_AT_PAGESZ || sp[1] != 4096) {
/* VG_(printf)("trying %p\n", sp); */
sp--;
}
if (sp[2] == VKI_AT_BASE
&& sp[0] == VKI_AT_PAGESZ
&& sp[-2] == VKI_AT_PHNUM
&& sp[-4] == VKI_AT_PHENT
&& sp[-6] == VKI_AT_PHDR
&& sp[-6-1] == 0) {
if (0)
VG_(printf)("Looks like you've got a 2.2.X kernel here.\n");
sp -= 6;
} else
if (sp[2] == VKI_AT_CLKTCK
&& sp[0] == VKI_AT_PAGESZ
&& sp[-2] == VKI_AT_HWCAP
&& sp[-2-1] == 0) {
if (0)
VG_(printf)("Looks like you've got a 2.4.X kernel here.\n");
sp -= 2;
} else
if (sp[2] == VKI_AT_CLKTCK
&& sp[0] == VKI_AT_PAGESZ
&& sp[-2] == VKI_AT_HWCAP
&& sp[-4] == VKI_AT_SYSINFO
&& sp[-4-1] == 0) {
if (0)
VG_(printf)("Looks like you've got a 2.4.X kernel with "
"a sysinfo page at %x here.\n", sp[-3]);
VG_(sysinfo_page_exists) = True;
VG_(sysinfo_page_addr) = sp[-3];
sp -= 4;
} else
if (sp[2] == VKI_AT_CLKTCK
&& sp[0] == VKI_AT_PAGESZ
&& sp[-2] == VKI_AT_HWCAP
&& sp[-4] == VKI_AT_USER_AUX_SEGMENT
&& sp[-4-1] == 0) {
if (0)
VG_(printf)("Looks like you've got a R-H Limbo 2.4.X "
"kernel here.\n");
sp -= 4;
} else
if (sp[2] == VKI_AT_CLKTCK
&& sp[0] == VKI_AT_PAGESZ
&& sp[-2] == VKI_AT_HWCAP
&& sp[-2-20-1] == 0) {
if (0)
VG_(printf)("Looks like you've got a early 2.4.X kernel here.\n");
sp -= 22;
} else
if (sp[2] == VKI_AT_CLKTCK
&& sp[0] == VKI_AT_PAGESZ
&& sp[-2] == VKI_AT_HWCAP
&& sp[-4-1] == 0) {
if (0)
VG_(printf)("Looks like a 2.5.43-2.5.67 kernel here.\n");
sp -= 4;
} else
if (sp[2] == VKI_AT_CLKTCK
&& sp[0] == VKI_AT_PAGESZ
&& sp[-2] == VKI_AT_HWCAP
&& sp[-6] == VKI_AT_SYSINFO
&& sp[-6-1] == 0) {
if (0)
VG_(printf)("Looks like a >= 2.5.68 kernel with "
"a sysinfo page at %x here.\n", sp[-5]);
VG_(sysinfo_page_exists) = True;
VG_(sysinfo_page_addr) = sp[-5];
sp -= 6;
} else
args_grok_error(
"ELF frame does not look like 2.2.X or 2.4.X.\n "
"See kernel sources linux/fs/binfmt_elf.c to make sense of this."
);
sp--;
if (*sp != 0)
args_grok_error("can't find NULL at end of env[]");
/* sp now points to NULL at the end of env[] */
ctr = 0;
while (True) {
sp --;
if (*sp == 0) break;
if (++ctr >= 2000)
args_grok_error(
"suspiciously many (2000) env[] entries; giving up");
}
/* sp now points to NULL at the end of argv[] */
VG_(client_envp) = (Char**)(sp+1);
ctr = 0;
VG_(client_argc) = 0;
while (True) {
sp--;
if (*sp == VG_(client_argc))
break;
VG_(client_argc)++;
if (++ctr >= 1000)
args_grok_error(
"suspiciously many (1000) argv[] entries; giving up");
}
VG_(client_argv) = (Char**)(sp+1);
}
/* Now that VG_(client_envp) has been set, we can extract the args
for Valgrind itself. Copy into global var so that we don't have to
write zeroes to the getenv'd value itself. */
str = VG_(getenv)("VG_ARGS");
argc = 0;
if (!str) {
config_error("Can't read options from env var VG_ARGS.");
}
if (VG_(strlen)(str) >= M_VG_CMDLINE_STRLEN-1) {
config_error("Command line length exceeds M_CMDLINE_STRLEN.");
}
VG_(strcpy)(vg_cmdline_copy, str);
str = NULL;
p = &vg_cmdline_copy[0];
while (True) {
while (ISSPACE(*p)) { *p = 0; p++; }
if (*p == 0) break;
if (argc < M_VG_CMDLINE_OPTS-1) {
argv[argc] = p; argc++;
} else {
config_error(
"Found more than M_CMDLINE_OPTS command-line opts.");
}
while (*p != 0 && !ISSPACE(*p)) p++;
}
for (i = 0; i < argc; i++) {
if (VG_CLO_STREQ(argv[i], "-v") ||
VG_CLO_STREQ(argv[i], "--verbose"))
VG_(clo_verbosity)++;
else if (VG_CLO_STREQ(argv[i], "-q") ||
VG_CLO_STREQ(argv[i], "--quiet"))
VG_(clo_verbosity)--;
else if (VG_CLO_STREQ(argv[i], "--error-limit=yes"))
VG_(clo_error_limit) = True;
else if (VG_CLO_STREQ(argv[i], "--error-limit=no"))
VG_(clo_error_limit) = False;
else if (VG_CLO_STREQ(argv[i], "--gdb-attach=yes"))
VG_(clo_GDB_attach) = True;
else if (VG_CLO_STREQ(argv[i], "--gdb-attach=no"))
VG_(clo_GDB_attach) = False;
else if (VG_CLO_STREQN(11,argv[i], "--gdb-path="))
VG_(clo_GDB_path) = &argv[i][11];
else if (VG_CLO_STREQ(argv[i], "--gen-suppressions=yes"))
VG_(clo_gen_suppressions) = True;
else if (VG_CLO_STREQ(argv[i], "--gen-suppressions=no"))
VG_(clo_gen_suppressions) = False;
else if (VG_CLO_STREQ(argv[i], "--show-below-main=yes"))
VG_(clo_show_below_main) = True;
else if (VG_CLO_STREQ(argv[i], "--show-below-main=no"))
VG_(clo_show_below_main) = False;
else if (VG_CLO_STREQ(argv[i], "--demangle=yes"))
VG_(clo_demangle) = True;
else if (VG_CLO_STREQ(argv[i], "--demangle=no"))
VG_(clo_demangle) = False;
else if (VG_CLO_STREQ(argv[i], "--trace-children=yes"))
VG_(clo_trace_children) = True;
else if (VG_CLO_STREQ(argv[i], "--trace-children=no"))
VG_(clo_trace_children) = False;
else if (VG_CLO_STREQ(argv[i], "--run-libc-freeres=yes"))
VG_(clo_run_libc_freeres) = True;
else if (VG_CLO_STREQ(argv[i], "--run-libc-freeres=no"))
VG_(clo_run_libc_freeres) = False;
else if (VG_CLO_STREQ(argv[i], "--track-fds=yes"))
VG_(clo_track_fds) = True;
else if (VG_CLO_STREQ(argv[i], "--track-fds=no"))
VG_(clo_track_fds) = False;
else if (VG_CLO_STREQN(15, argv[i], "--sanity-level="))
VG_(sanity_level) = (Int)VG_(atoll)(&argv[i][15]);
else if (VG_CLO_STREQN(13, argv[i], "--logfile-fd=")) {
VG_(clo_log_to) = VgLogTo_Fd;
VG_(clo_logfile_name) = NULL;
eventually_logfile_fd = (Int)VG_(atoll)(&argv[i][13]);
}
else if (VG_CLO_STREQN(10, argv[i], "--logfile=")) {
VG_(clo_log_to) = VgLogTo_File;
VG_(clo_logfile_name) = &argv[i][10];
}
else if (VG_CLO_STREQN(12, argv[i], "--logsocket=")) {
VG_(clo_log_to) = VgLogTo_Socket;
VG_(clo_logfile_name) = &argv[i][12];
}
else if (VG_CLO_STREQN(11, argv[i], "--input-fd="))
VG_(clo_input_fd) = (Int)VG_(atoll)(&argv[i][11]);
else if (VG_CLO_STREQN(15, argv[i], "--suppressions=")) {
if (VG_(clo_n_suppressions) >= VG_CLO_MAX_SFILES) {
VG_(message)(Vg_UserMsg, "Too many suppression files specified.");
VG_(message)(Vg_UserMsg,
"Increase VG_CLO_MAX_SFILES and recompile.");
VG_(bad_option)(argv[i]);
}
VG_(clo_suppressions)[VG_(clo_n_suppressions)] = &argv[i][15];
VG_(clo_n_suppressions)++;
}
else if (VG_CLO_STREQ(argv[i], "--profile=yes"))
VG_(clo_profile) = True;
else if (VG_CLO_STREQ(argv[i], "--profile=no"))
VG_(clo_profile) = False;
else if (VG_CLO_STREQ(argv[i], "--chain-bb=yes"))
VG_(clo_chain_bb) = True;
else if (VG_CLO_STREQ(argv[i], "--chain-bb=no"))
VG_(clo_chain_bb) = False;
else if (VG_CLO_STREQ(argv[i], "--single-step=yes"))
VG_(clo_single_step) = True;
else if (VG_CLO_STREQ(argv[i], "--single-step=no"))
VG_(clo_single_step) = False;
else if (VG_CLO_STREQ(argv[i], "--optimise=yes"))
VG_(clo_optimise) = True;
else if (VG_CLO_STREQ(argv[i], "--optimise=no"))
VG_(clo_optimise) = False;
/* "vwxyz" --> 000zyxwv (binary) */
else if (VG_CLO_STREQN(16, argv[i], "--trace-codegen=")) {
Int j;
char* opt = & argv[i][16];
if (5 != VG_(strlen)(opt)) {
VG_(message)(Vg_UserMsg,
"--trace-codegen argument must have 5 digits");
VG_(bad_option)(argv[i]);
}
for (j = 0; j < 5; j++) {
if ('0' == opt[j]) { /* do nothing */ }
else if ('1' == opt[j]) VG_(clo_trace_codegen) |= (1 << j);
else {
VG_(message)(Vg_UserMsg, "--trace-codegen argument can only "
"contain 0s and 1s");
VG_(bad_option)(argv[i]);
}
}
}
else if (VG_CLO_STREQ(argv[i], "--trace-syscalls=yes"))
VG_(clo_trace_syscalls) = True;
else if (VG_CLO_STREQ(argv[i], "--trace-syscalls=no"))
VG_(clo_trace_syscalls) = False;
else if (VG_CLO_STREQ(argv[i], "--trace-signals=yes"))
VG_(clo_trace_signals) = True;
else if (VG_CLO_STREQ(argv[i], "--trace-signals=no"))
VG_(clo_trace_signals) = False;
else if (VG_CLO_STREQ(argv[i], "--trace-symtab=yes"))
VG_(clo_trace_symtab) = True;
else if (VG_CLO_STREQ(argv[i], "--trace-symtab=no"))
VG_(clo_trace_symtab) = False;
else if (VG_CLO_STREQ(argv[i], "--trace-sched=yes"))
VG_(clo_trace_sched) = True;
else if (VG_CLO_STREQ(argv[i], "--trace-sched=no"))
VG_(clo_trace_sched) = False;
else if (VG_CLO_STREQ(argv[i], "--trace-pthread=none"))
VG_(clo_trace_pthread_level) = 0;
else if (VG_CLO_STREQ(argv[i], "--trace-pthread=some"))
VG_(clo_trace_pthread_level) = 1;
else if (VG_CLO_STREQ(argv[i], "--trace-pthread=all"))
VG_(clo_trace_pthread_level) = 2;
else if (VG_CLO_STREQN(14, argv[i], "--weird-hacks="))
VG_(clo_weird_hacks) = &argv[i][14];
else if (VG_CLO_STREQN(17, argv[i], "--signal-polltime="))
VG_(clo_signal_polltime) = VG_(atoll)(&argv[i][17]);
else if (VG_CLO_STREQ(argv[i], "--lowlat-signals=yes"))
VG_(clo_lowlat_signals) = True;
else if (VG_CLO_STREQ(argv[i], "--lowlat-signals=no"))
VG_(clo_lowlat_signals) = False;
else if (VG_CLO_STREQ(argv[i], "--lowlat-syscalls=yes"))
VG_(clo_lowlat_syscalls) = True;
else if (VG_CLO_STREQ(argv[i], "--lowlat-syscalls=no"))
VG_(clo_lowlat_syscalls) = False;
else if (VG_CLO_STREQN(13, argv[i], "--stop-after="))
VG_(clo_stop_after) = VG_(atoll)(&argv[i][13]);
else if (VG_CLO_STREQN(13, argv[i], "--dump-error="))
VG_(clo_dump_error) = (Int)VG_(atoll)(&argv[i][13]);
else if (VG_CLO_STREQ(argv[i], "--wait-for-gdb=yes"))
VG_(clo_wait_for_gdb) = True;
else if (VG_CLO_STREQ(argv[i], "--wait-for-gdb=no"))
VG_(clo_wait_for_gdb) = False;
else if (VG_CLO_STREQN(14, argv[i], "--num-callers=")) {
/* Make sure it's sane. */
VG_(clo_backtrace_size) = (Int)VG_(atoll)(&argv[i][14]);
if (VG_(clo_backtrace_size) < 1)
VG_(clo_backtrace_size) = 1;
if (VG_(clo_backtrace_size) >= VG_DEEPEST_BACKTRACE)
VG_(clo_backtrace_size) = VG_DEEPEST_BACKTRACE;
}
else if (VG_(needs).command_line_options) {
Bool ok = SK_(process_cmd_line_option)(argv[i]);
if (!ok)
usage();
}
else
usage();
}
# undef ISSPACE
if (VG_(clo_verbosity) < 0)
VG_(clo_verbosity) = 0;
if (VG_(clo_GDB_attach) && VG_(clo_trace_children)) {
VG_(message)(Vg_UserMsg, "");
VG_(message)(Vg_UserMsg,
"--gdb-attach=yes conflicts with --trace-children=yes");
VG_(message)(Vg_UserMsg,
"Please choose one or the other, but not both.");
VG_(bad_option)("--gdb-attach=yes and --trace-children=yes");
}
/* Set up logging now. After this is done, VG_(clo_logfile_fd)
should be connected to whatever sink has been selected, and we
indiscriminately chuck stuff into it without worrying what the
nature of it is. Oh the wonder of Unix streams. */
/* So far we should be still attached to stdout, so we can show on
the terminal any problems to do with processing command line
opts. */
vg_assert(VG_(clo_logfile_fd) == 1 /* stdout */);
vg_assert(VG_(logging_to_filedes) == True);
switch (VG_(clo_log_to)) {
case VgLogTo_Fd:
vg_assert(VG_(clo_logfile_name) == NULL);
VG_(clo_logfile_fd) = eventually_logfile_fd;
break;
case VgLogTo_File: {
Char logfilename[1000];
Int seq = 0;
Int pid = VG_(getpid)();
vg_assert(VG_(clo_logfile_name) != NULL);
vg_assert(VG_(strlen)(VG_(clo_logfile_name)) <= 900); /* paranoia */
for(;;) {
if (seq == 0)
VG_(sprintf)(logfilename, "%s.pid%d",
VG_(clo_logfile_name), pid );
else
VG_(sprintf)(logfilename, "%s.pid%d.%d",
VG_(clo_logfile_name), pid, seq );
seq++;
eventually_logfile_fd
= VG_(open)(logfilename,
VKI_O_CREAT|VKI_O_WRONLY|VKI_O_EXCL|VKI_O_TRUNC,
VKI_S_IRUSR|VKI_S_IWUSR);
if (eventually_logfile_fd >= 0) {
VG_(clo_logfile_fd) = eventually_logfile_fd;
break;
} else {
if (eventually_logfile_fd != -VKI_EEXIST) {
VG_(message)(Vg_UserMsg,
"Can't create/open log file `%s.pid%d'; giving up!",
VG_(clo_logfile_name), pid);
VG_(bad_option)(
"--logfile=<file> didn't work out for some reason.");
break;
}
}
}
break;
}
case VgLogTo_Socket: {
vg_assert(VG_(clo_logfile_name) != NULL);
vg_assert(VG_(strlen)(VG_(clo_logfile_name)) <= 900); /* paranoia */
eventually_logfile_fd
= VG_(connect_via_socket)( VG_(clo_logfile_name) );
if (eventually_logfile_fd == -1) {
VG_(message)(Vg_UserMsg,
"Invalid --logsocket=ipaddr or --logsocket=ipaddr:port spec");
VG_(message)(Vg_UserMsg,
"of `%s'; giving up!", VG_(clo_logfile_name) );
VG_(bad_option)(
"--logsocket=");
}
if (eventually_logfile_fd == -2) {
VG_(message)(Vg_UserMsg,
"valgrind: failed to connect to logging server `%s'.",
VG_(clo_logfile_name) );
VG_(message)(Vg_UserMsg,
"Log messages will sent to stderr instead." );
VG_(message)(Vg_UserMsg,
"" );
/* We don't change anything here. */
} else {
vg_assert(eventually_logfile_fd > 0);
VG_(clo_logfile_fd) = eventually_logfile_fd;
VG_(logging_to_filedes) = False;
}
break;
}
}
/* Move logfile_fd into the safe range, so it doesn't conflict with any app fds */
eventually_logfile_fd = VG_(fcntl)(VG_(clo_logfile_fd), VKI_F_DUPFD, VG_MAX_FD+1);
if (eventually_logfile_fd < 0)
VG_(message)(Vg_UserMsg, "valgrind: failed to move logfile fd into safe range");
else {
VG_(clo_logfile_fd) = eventually_logfile_fd;
VG_(fcntl)(VG_(clo_logfile_fd), VKI_F_SETFD, VKI_FD_CLOEXEC);
}
/* Ok, the logging sink is running now. Print a suitable preamble.
If logging to file or a socket, write details of parent PID and
command line args, to help people trying to interpret the
results of a run which encompasses multiple processes. */
if (VG_(clo_verbosity > 0)) {
/* Skin details */
VG_(message)(Vg_UserMsg, "%s%s%s, %s for x86-linux.",
VG_(details).name,
NULL == VG_(details).version ? "" : "-",
NULL == VG_(details).version
? (Char*)"" : VG_(details).version,
VG_(details).description);
VG_(message)(Vg_UserMsg, "%s", VG_(details).copyright_author);
/* Core details */
VG_(message)(Vg_UserMsg,
"Using valgrind-%s, a program supervision framework for x86-linux.",
VERSION);
VG_(message)(Vg_UserMsg,
"Copyright (C) 2000-2003, and GNU GPL'd, by Julian Seward.");
}
if (VG_(clo_verbosity) > 0 && VG_(clo_log_to) != VgLogTo_Fd) {
VG_(message)(Vg_UserMsg, "");
VG_(message)(Vg_UserMsg,
"My PID = %d, parent PID = %d. Prog and args are:",
VG_(getpid)(), VG_(getppid)() );
for (i = 0; i < VG_(client_argc); i++)
VG_(message)(Vg_UserMsg, " %s", VG_(client_argv)[i]);
}
if (VG_(clo_verbosity) > 1) {
if (VG_(clo_log_to) != VgLogTo_Fd)
VG_(message)(Vg_UserMsg, "");
VG_(message)(Vg_UserMsg, "Command line");
for (i = 0; i < VG_(client_argc); i++)
VG_(message)(Vg_UserMsg, " %s", VG_(client_argv)[i]);
VG_(message)(Vg_UserMsg, "Startup, with flags:");
for (i = 0; i < argc; i++) {
VG_(message)(Vg_UserMsg, " %s", argv[i]);
}
}
if (VG_(clo_n_suppressions) == 0 &&
(VG_(needs).core_errors || VG_(needs).skin_errors)) {
config_error("No error-suppression files were specified.");
}
if (VG_(clo_gen_suppressions) &&
!VG_(needs).core_errors && !VG_(needs).skin_errors) {
config_error("Can't use --gen-suppressions=yes with this skin,\n"
" as it doesn't generate errors.");
}
}
/* ---------------------------------------------------------------------
Copying to/from m_state_static.
------------------------------------------------------------------ */
/* See comment about this in vg_include.h. Change only with
great care.
*/
__attribute__ ((aligned (16)))
UInt VG_(m_state_static) [6 /* segment regs, Intel order */
+ 8 /* int regs, in Intel order */
+ 1 /* %eflags */
+ 1 /* %eip */
+ VG_SIZE_OF_SSESTATE_W /* FPU state */
];
UInt VG_(insertDflag)(UInt eflags, Int d)
{
vg_assert(d == 1 || d == -1);
eflags &= ~EFlagD;
if (d < 0)
eflags |= EFlagD;
return eflags;
}
Int VG_(extractDflag)(UInt eflags)
{
Int ret;
if (eflags & EFlagD)
ret = -1;
else
ret = 1;
return ret;
}
void VG_(copy_baseBlock_to_m_state_static) ( void )
{
Int i;
VG_(m_state_static)[ 0/4] = VG_(baseBlock)[VGOFF_(m_cs)];
VG_(m_state_static)[ 4/4] = VG_(baseBlock)[VGOFF_(m_ss)];
VG_(m_state_static)[ 8/4] = VG_(baseBlock)[VGOFF_(m_ds)];
VG_(m_state_static)[12/4] = VG_(baseBlock)[VGOFF_(m_es)];
VG_(m_state_static)[16/4] = VG_(baseBlock)[VGOFF_(m_fs)];
VG_(m_state_static)[20/4] = VG_(baseBlock)[VGOFF_(m_gs)];
VG_(m_state_static)[24/4] = VG_(baseBlock)[VGOFF_(m_eax)];
VG_(m_state_static)[28/4] = VG_(baseBlock)[VGOFF_(m_ecx)];
VG_(m_state_static)[32/4] = VG_(baseBlock)[VGOFF_(m_edx)];
VG_(m_state_static)[36/4] = VG_(baseBlock)[VGOFF_(m_ebx)];
VG_(m_state_static)[40/4] = VG_(baseBlock)[VGOFF_(m_esp)];
VG_(m_state_static)[44/4] = VG_(baseBlock)[VGOFF_(m_ebp)];
VG_(m_state_static)[48/4] = VG_(baseBlock)[VGOFF_(m_esi)];
VG_(m_state_static)[52/4] = VG_(baseBlock)[VGOFF_(m_edi)];
VG_(m_state_static)[56/4]
= VG_(insertDflag)(VG_(baseBlock)[VGOFF_(m_eflags)],
VG_(baseBlock)[VGOFF_(m_dflag)]);
VG_(m_state_static)[60/4] = VG_(baseBlock)[VGOFF_(m_eip)];
for (i = 0; i < VG_SIZE_OF_SSESTATE_W; i++)
VG_(m_state_static)[64/4 + i]
= VG_(baseBlock)[VGOFF_(m_ssestate) + i];
}
void VG_(copy_m_state_static_to_baseBlock) ( void )
{
Int i;
VG_(baseBlock)[VGOFF_(m_cs)] = VG_(m_state_static)[ 0/4];
VG_(baseBlock)[VGOFF_(m_ss)] = VG_(m_state_static)[ 4/4];
VG_(baseBlock)[VGOFF_(m_ds)] = VG_(m_state_static)[ 8/4];
VG_(baseBlock)[VGOFF_(m_es)] = VG_(m_state_static)[12/4];
VG_(baseBlock)[VGOFF_(m_fs)] = VG_(m_state_static)[16/4];
VG_(baseBlock)[VGOFF_(m_gs)] = VG_(m_state_static)[20/4];
VG_(baseBlock)[VGOFF_(m_eax)] = VG_(m_state_static)[24/4];
VG_(baseBlock)[VGOFF_(m_ecx)] = VG_(m_state_static)[28/4];
VG_(baseBlock)[VGOFF_(m_edx)] = VG_(m_state_static)[32/4];
VG_(baseBlock)[VGOFF_(m_ebx)] = VG_(m_state_static)[36/4];
VG_(baseBlock)[VGOFF_(m_esp)] = VG_(m_state_static)[40/4];
VG_(baseBlock)[VGOFF_(m_ebp)] = VG_(m_state_static)[44/4];
VG_(baseBlock)[VGOFF_(m_esi)] = VG_(m_state_static)[48/4];
VG_(baseBlock)[VGOFF_(m_edi)] = VG_(m_state_static)[52/4];
VG_(baseBlock)[VGOFF_(m_eflags)]
= VG_(m_state_static)[56/4] & ~EFlagD;
VG_(baseBlock)[VGOFF_(m_dflag)]
= VG_(extractDflag)(VG_(m_state_static)[56/4]);
VG_(baseBlock)[VGOFF_(m_eip)] = VG_(m_state_static)[60/4];
for (i = 0; i < VG_SIZE_OF_SSESTATE_W; i++)
VG_(baseBlock)[VGOFF_(m_ssestate) + i]
= VG_(m_state_static)[64/4 + i];
}
Addr VG_(get_stack_pointer) ( void )
{
return VG_(baseBlock)[VGOFF_(m_esp)];
}
/* Some random tests needed for leak checking */
Bool VG_(within_stack)(Addr a)
{
if (a >= ((Addr)(&VG_(stack)))
&& a <= ((Addr)(&VG_(stack))) + sizeof(VG_(stack)))
return True;
else
return False;
}
Bool VG_(within_m_state_static_OR_threads)(Addr a)
{
if (a >= ((Addr)(&VG_(m_state_static)))
&& a < ((Addr)(&VG_(m_state_static))) + sizeof(VG_(m_state_static)))
return True;
if (a >= ((Addr)(&VG_(threads)[0]))
&& a < ((Addr)(&VG_(threads)[VG_N_THREADS])))
return True;
return False;
}
/* ---------------------------------------------------------------------
Show accumulated counts.
------------------------------------------------------------------ */
static __inline__ Int safe_idiv(Int a, Int b)
{
return (b == 0 ? 0 : a / b);
}
static void vg_show_counts ( void )
{
VG_(message)(Vg_DebugMsg,
" TT/TC: %d tc sectors discarded.",
VG_(number_of_tc_discards) );
VG_(message)(Vg_DebugMsg,
" %d chainings, %d unchainings.",
VG_(bb_enchain_count), VG_(bb_dechain_count) );
VG_(message)(Vg_DebugMsg,
"translate: new %d (%d -> %d; ratio %d:10)",
VG_(overall_in_count),
VG_(overall_in_osize),
VG_(overall_in_tsize),
safe_idiv(10*VG_(overall_in_tsize), VG_(overall_in_osize)));
VG_(message)(Vg_DebugMsg,
" discard %d (%d -> %d; ratio %d:10).",
VG_(overall_out_count),
VG_(overall_out_osize),
VG_(overall_out_tsize),
safe_idiv(10*VG_(overall_out_tsize), VG_(overall_out_osize)));
VG_(message)(Vg_DebugMsg,
" dispatch: %llu jumps (bb entries), of which %u (%lu%%) were unchained.",
VG_(bbs_done),
VG_(unchained_jumps_done),
((ULong)(100) * (ULong)(VG_(unchained_jumps_done)))
/ ( VG_(bbs_done)==0 ? 1 : VG_(bbs_done) )
);
VG_(message)(Vg_DebugMsg,
" %d/%d major/minor sched events. %d tt_fast misses.",
VG_(num_scheduling_events_MAJOR),
VG_(num_scheduling_events_MINOR),
VG_(tt_fast_misses));
VG_(message)(Vg_DebugMsg,
"reg-alloc: %d t-req-spill, "
"%d+%d orig+spill uis, %d total-reg-r.",
VG_(translations_needing_spill),
VG_(uinstrs_prealloc),
VG_(uinstrs_spill),
VG_(total_reg_rank) );
VG_(message)(Vg_DebugMsg,
" sanity: %d cheap, %d expensive checks.",
VG_(sanity_fast_count),
VG_(sanity_slow_count) );
VG_(print_ccall_stats)();
}
/* ---------------------------------------------------------------------
Main!
------------------------------------------------------------------ */
/* Initialize the PID and PGRP of scheduler LWP; this is also called
in any new children after fork. */
static void newpid(ThreadId unused)
{
/* PID of scheduler LWP */
VG_(main_pid) = VG_(getpid)();
VG_(main_pgrp) = VG_(getpgrp)();
}
/* Where we jump to once Valgrind has got control, and the real
machine's state has been copied to the m_state_static. */
void VG_(main) ( void )
{
Int i;
VgSchedReturnCode src;
if (0) {
if (VG_(have_ssestate))
VG_(printf)("Looks like a SSE-capable CPU\n");
else
VG_(printf)("Looks like a MMX-only CPU\n");
}
/* Check skin and core versions are compatible */
if (VG_CORE_INTERFACE_MAJOR_VERSION != VG_(skin_interface_major_version)) {
VG_(printf)("Error:\n"
" Tool and core interface versions do not match.\n"
" Interface version used by core is: %d.%d\n"
" Interface version used by tool is: %d.%d\n"
" The major version numbers must match.\n",
VG_CORE_INTERFACE_MAJOR_VERSION,
VG_CORE_INTERFACE_MINOR_VERSION,
VG_(skin_interface_major_version),
VG_(skin_interface_minor_version));
VG_(printf)(" You need to at least recompile, and possibly update,\n");
if (VG_CORE_INTERFACE_MAJOR_VERSION > VG_(skin_interface_major_version))
VG_(printf)(" your skin to work with this version of Valgrind.\n");
else
VG_(printf)(" your version of Valgrind to work with this skin.\n");
VG_(printf)(" Aborting, sorry.\n");
VG_(exit)(1);
}
VG_(atfork)(NULL, NULL, newpid);
newpid(VG_INVALID_THREADID);
/* Set up our stack sanity-check words. */
for (i = 0; i < 10; i++) {
VG_(stack)[i] = (UInt)(&VG_(stack)[i]) ^ 0xA4B3C2D1;
VG_(stack)[VG_STACK_SIZE_W-1-i]
= (UInt)(&VG_(stack)[VG_STACK_SIZE_W-i-1]) ^ 0xABCD4321;
}
/* Read /proc/self/maps into a buffer. Must be before:
- SK_(pre_clo_init)(): so that if it calls VG_(malloc)(), any mmap'd
superblocks are not erroneously identified as being owned by the
client, which would be bad.
- init_memory(): that's where the buffer is parsed
- init_tt_tc(): so the anonymous mmaps for the translation table and
translation cache aren't identified as part of the client, which would
waste > 20M of virtual address space, and be bad.
*/
VG_(read_procselfmaps)();
/* Setup stuff that depends on the skin. Must be before:
- vg_init_baseBlock(): to register helpers
- process_cmd_line_options(): to register skin name and description,
and turn on/off 'command_line_options' need
- init_memory() (to setup memory event trackers).
*/
SK_(pre_clo_init)();
VG_(sanity_check_needs)();
/* Process Valgrind's command-line opts (from env var VG_ARGS). */
process_cmd_line_options();
/* Hook to delay things long enough so we can get the pid and
attach GDB in another shell. */
if (VG_(clo_wait_for_gdb)) {
VG_(printf)("pid=%d\n", VG_(getpid)());
/* do "jump *$eip" to skip this in gdb */
VG_(do_syscall)(__NR_pause);
}
/* Do post command-line processing initialisation. Must be before:
- vg_init_baseBlock(): to register any more helpers
*/
SK_(post_clo_init)();
/* Set up baseBlock offsets and copy the saved machine's state into it. */
vg_init_baseBlock();
/* Search for file descriptors that are inherited from our parent. */
if (VG_(clo_track_fds))
VG_(init_preopened_fds)();
/* Initialise the scheduler, and copy the client's state from
baseBlock into VG_(threads)[1]. Must be before:
- VG_(sigstartup_actions)()
*/
VG_(scheduler_init)();
/* Set up the ProxyLWP machinery */
VG_(proxy_init)();
/* Initialise the signal handling subsystem, temporarily parking
the saved blocking-mask in saved_sigmask. */
VG_(sigstartup_actions)();
/* Perhaps we're profiling Valgrind? */
if (VG_(clo_profile))
VGP_(init_profiling)();
/* Start calibration of our RDTSC-based clock. */
VG_(start_rdtsc_calibration)();
/* Parse /proc/self/maps to learn about startup segments. */
VGP_PUSHCC(VgpInitMem);
VG_(init_memory)();
VGP_POPCC(VgpInitMem);
/* Read the list of errors to suppress. This should be found in
the file specified by vg_clo_suppressions. */
if (VG_(needs).core_errors || VG_(needs).skin_errors)
VG_(load_suppressions)();
/* End calibration of our RDTSC-based clock, leaving it as long as
we can. */
VG_(end_rdtsc_calibration)();
/* Initialise translation table and translation cache. */
VG_(init_tt_tc)();
if (VG_(clo_verbosity) == 1) {
VG_(message)(Vg_UserMsg,
"For more details, rerun with: -v");
}
/* Force a read of the debug info so that we can look for
glibc entry points to intercept. */
VG_(setup_code_redirect_table)();
/* Now it is safe for malloc et al in vg_clientmalloc.c to act
instrumented-ly. */
if (VG_(clo_verbosity) > 0)
VG_(message)(Vg_UserMsg, "");
VG_(bbs_to_go) = VG_(clo_stop_after);
/* Run! */
VG_(running_on_simd_CPU) = True;
VGP_PUSHCC(VgpSched);
if (__builtin_setjmp(&VG_(fatal_signal_jmpbuf)) == 0) {
VG_(fatal_signal_set) = True;
src = VG_(scheduler)();
} else
src = VgSrc_FatalSig;
VGP_POPCC(VgpSched);
VG_(running_on_simd_CPU) = False;
if (VG_(clo_verbosity) > 0)
VG_(message)(Vg_UserMsg, "");
if (src == VgSrc_Deadlock) {
VG_(message)(Vg_UserMsg,
"Warning: pthread scheduler exited due to deadlock");
}
/* Print out file descriptor summary and stats. */
if(VG_(clo_track_fds))
VG_(fd_stats)();
if (VG_(needs).core_errors || VG_(needs).skin_errors)
VG_(show_all_errors)();
SK_(fini)( VG_(exitcode) );
VG_(do_sanity_checks)( True /*include expensive checks*/ );
if (VG_(clo_verbosity) > 1)
vg_show_counts();
if (VG_(clo_verbosity) > 3)
VG_(print_UInstr_histogram)();
if (0) {
VG_(message)(Vg_DebugMsg, "");
VG_(message)(Vg_DebugMsg,
"------ Valgrind's internal memory use stats follow ------" );
VG_(mallocSanityCheckAll)();
VG_(show_all_arena_stats)();
VG_(message)(Vg_DebugMsg,
"------ Valgrind's ExeContext management stats follow ------" );
VG_(show_ExeContext_stats)();
}
if (VG_(clo_profile))
VGP_(done_profiling)();
VG_(shutdown_logging)();
/* Remove valgrind.so from a LD_PRELOAD=... string so child
processes don't get traced into. Also mess up $libdir/valgrind
so that our libpthread.so disappears from view. */
/* 26 Apr 03: doing this often causes trouble for no reason, and is
pointless when we are just about to VgSrc_ExitSyscall. So don't
bother in that case. */
if ((!VG_(clo_trace_children))
&& src != VgSrc_ExitSyscall) {
VG_(mash_LD_PRELOAD_and_LD_LIBRARY_PATH)(
VG_(getenv)("LD_PRELOAD"),
VG_(getenv)("LD_LIBRARY_PATH")
);
}
/* We're exiting, so nuke all the threads and clean up the proxy LWPs */
vg_assert(src == VgSrc_FatalSig ||
VG_(threads)[VG_(last_run_tid)].status == VgTs_Runnable ||
VG_(threads)[VG_(last_run_tid)].status == VgTs_WaitJoiner);
VG_(nuke_all_threads_except)(VG_INVALID_THREADID);
/* Decide how to exit. This depends on what the scheduler
returned. */
switch (src) {
case VgSrc_ExitSyscall: /* the normal way out */
vg_assert(VG_(last_run_tid) > 0
&& VG_(last_run_tid) < VG_N_THREADS);
VG_(proxy_shutdown)();
/* The thread's %EBX at the time it did __NR_exit() will hold
the arg to __NR_exit(), so we just do __NR_exit() with
that arg. */
VG_(exit)( VG_(exitcode) );
/* NOT ALIVE HERE! */
VG_(core_panic)("entered the afterlife in vg_main() -- ExitSyscall");
break; /* what the hell :) */
case VgSrc_Deadlock:
/* Just exit now. No point in continuing. */
VG_(proxy_shutdown)();
VG_(exit)(0);
VG_(core_panic)("entered the afterlife in vg_main() -- Deadlock");
break;
case VgSrc_BbsDone:
/* Tricky; we have to try and switch back to the real CPU.
This is all very dodgy and won't work at all in the
presence of threads, or if the client happened to be
running a signal handler. */
/* Prepare to restore state to the real CPU. */
VG_(sigshutdown_actions)();
VG_(load_thread_state)(1 /* root thread */ );
VG_(copy_baseBlock_to_m_state_static)();
VG_(proxy_shutdown)();
/* This pushes a return address on the simulator's stack,
which is abandoned. We call vg_sigshutdown_actions() at
the end of vg_switch_to_real_CPU(), so as to ensure that
the original stack and machine state is restored before
the real signal mechanism is restored. */
VG_(switch_to_real_CPU)();
case VgSrc_FatalSig:
/* We were killed by a fatal signal, so replicate the effect */
vg_assert(VG_(fatal_sigNo) != -1);
VG_(kill_self)(VG_(fatal_sigNo));
VG_(core_panic)("vg_main(): signal was supposed to be fatal");
break;
default:
VG_(core_panic)("vg_main(): unexpected scheduler return code");
}
}
/* Debugging thing .. can be called from assembly with OYNK macro. */
void VG_(oynk) ( Int n )
{
OINK(n);
}
/* Find "valgrind.so" in a LD_PRELOAD=... string, and convert it to
"valgrinq.so", which doesn't do anything. This is used to avoid
tracing into child processes. To make this work the build system
also supplies a dummy file, "valgrinq.so".
Also replace "vgskin_<foo>.so" with whitespace, for the same reason;
without it, child processes try to find valgrind.so symbols in the
skin .so.
Also look for $(libdir)/lib/valgrind in LD_LIBRARY_PATH and change
it to $(libdir)/lib/valgrinq, so as to make our libpthread.so
disappear.
*/
static void slideleft ( Char* s )
{
vg_assert(s && (*s == ' ' || *s == ':'));
while (True) {
s[0] = s[1];
if (s[0] == '\0') break;
s++;
}
}
void VG_(mash_LD_PRELOAD_and_LD_LIBRARY_PATH) ( Char* ld_preload_str,
Char* ld_library_path_str )
{
Char* vg_prel = NULL;
Char* sk_prel = NULL;
Char* coredir2 = NULL;
Char* p;
Char* coredir_first;
Char* coredir_last;
Int coredir_len;
Int i;
Int what;
#define MUTANCY(n) { what = n; goto mutancy; }
if (ld_preload_str == NULL || ld_library_path_str == NULL) MUTANCY(0);
/* VG_(printf)("pre:\n%s\n%s\n", ld_preload_str, ld_library_path_str); */
/* LD_PRELOAD = "<skindir>/vgskin_foo.so:<coredir>/valgrind.so:X"
LD_LIBRARY_PATH = "<coredir>:Y" */
/* Setting up, finding things */
/* LD_PRELOAD: Search for "valgrind.so" */
vg_prel = VG_(strstr)(ld_preload_str, "valgrind.so");
/* LD_PRELOAD: if "valgrind.so" not found, has been done before;
"valgrinq.so" should be there instead. Then stop. */
if (NULL == vg_prel) {
if (VG_(strstr)(ld_preload_str, "valgrinq.so") == NULL) MUTANCY(1);
return;
}
/* LD_PRELOAD: find start of <coredir> */
p = vg_prel;
for (p = vg_prel; *p != ':' && p > ld_preload_str; p--) { }
if (*p != ':') MUTANCY(2); /* skin.so entry must precede it */
coredir_first = p+1;
coredir_last = vg_prel - 1;
coredir_len = coredir_last - coredir_first;
/* LD_PRELOAD: find "vgskin_foo.so" */
sk_prel = VG_(strstr)(ld_preload_str, "vgskin_");
if (sk_prel == NULL) MUTANCY(4);
/* LD_LIBRARY_PATH: find <coredir> */
*coredir_last = '\0'; /* Temporarily zero-terminate coredir */
coredir2 = VG_(strstr)(ld_library_path_str, coredir_first);
if (coredir2 == NULL) MUTANCY(5);
*coredir_last = '/'; /* Undo zero-termination */
/* Changing things */
/* LD_PRELOAD: "valgrind.so" --> "valgrinq.so" */
if (vg_prel[7] != 'd') MUTANCY(6);
vg_prel[7] = 'q';
/* LD_PRELOAD: "<skindir>/vgskin_foo.so:<coredir>/valgrinq.so:X" -->
" vgskin_foo.so:<coredir>/valgrinq.so:X" */
p = sk_prel-1;
while (*p != ':' && p >= ld_preload_str) {
*p = ' ';
p--;
}
/* LD_PRELOAD: " vgskin_foo.so:<coredir>/valgrinq.so:X" -->
" :<coredir>/valgrinq.so:X" */
p = sk_prel;
while (*p != ':' && *p != '\0') {
*p = ' ';
p++;
}
if (*p == '\0') MUTANCY(7); /* valgrind.so has disappeared?! */
/* LD_LIBRARY_PATH: "<coredir>:Y" --> " :Y" */
for (i = 0; i < coredir_len; i++)
coredir2[i] = ' ';
/* Zap the leading spaces and : in both strings. */
while (ld_preload_str[0] == ' ') slideleft(ld_preload_str);
if (ld_preload_str[0] == ':') slideleft(ld_preload_str);
while (ld_library_path_str[0] == ' ') slideleft(ld_library_path_str);
if (ld_library_path_str[0] == ':') slideleft(ld_library_path_str);
/* VG_(printf)("post:\n%s\n%s\n", ld_preload_str, ld_library_path_str); */
return;
mutancy:
VG_(printf)(
"\nVG_(mash_LD_PRELOAD_and_LD_LIBRARY_PATH): internal error:\n"
" what = %d\n"
" ld_preload_str = `%s'\n"
" ld_library_path_str = `%s'\n"
" vg_prel = `%s'\n"
" sk_prel = `%s'\n"
" coredir2 = `%s'\n"
" VG_LIBDIR = `%s'\n",
what, ld_preload_str, ld_library_path_str,
vg_prel, sk_prel, coredir2, VG_LIBDIR
);
VG_(printf)(
"\n"
"Note that this is often caused by mis-installation of valgrind.\n"
"Correct installation procedure is:\n"
" ./configure --prefix=/install/dir\n"
" make install\n"
"And then use /install/dir/bin/valgrind\n"
"Moving the installation directory elsewhere after 'make install'\n"
"will cause the above error. Hand-editing the paths in the shell\n"
"scripts is also likely to cause problems.\n"
"\n"
);
VG_(core_panic)("VG_(mash_LD_PRELOAD_and_LD_LIBRARY_PATH) failed\n");
}
/* RUNS ON THE CLIENT'S STACK, but on the real CPU. Start GDB and get
it to attach to this process. Called if the user requests this
service after an error has been shown, so she can poke around and
look at parameters, memory, etc. You can't meaningfully get GDB to
continue the program, though; to continue, quit GDB. */
extern void VG_(start_GDB_whilst_on_client_stack) ( void )
{
Int res;
UChar buf[100];
VG_(sprintf)(buf, "%s -nw /proc/%d/exe %d",
VG_(clo_GDB_path), VG_(getpid)(), VG_(getpid)());
VG_(message)(Vg_UserMsg, "starting GDB with cmd: %s", buf);
res = VG_(system)(buf);
if (res == 0) {
VG_(message)(Vg_UserMsg, "");
VG_(message)(Vg_UserMsg,
"GDB has detached. Valgrind regains control. We continue.");
} else {
VG_(message)(Vg_UserMsg, "Apparently failed!");
VG_(message)(Vg_UserMsg, "");
}
}
/* Print some helpful-ish text about unimplemented things, and give
up. */
void VG_(unimplemented) ( Char* msg )
{
VG_(message)(Vg_UserMsg, "");
VG_(message)(Vg_UserMsg,
"Valgrind detected that your program requires");
VG_(message)(Vg_UserMsg,
"the following unimplemented functionality:");
VG_(message)(Vg_UserMsg, " %s", msg);
VG_(message)(Vg_UserMsg,
"This may be because the functionality is hard to implement,");
VG_(message)(Vg_UserMsg,
"or because no reasonable program would behave this way,");
VG_(message)(Vg_UserMsg,
"or because nobody has yet needed it. In any case, let us know at");
VG_(message)(Vg_UserMsg,
"%s and/or try to work around the problem, if you can.", VG_BUGS_TO);
VG_(message)(Vg_UserMsg,
"");
VG_(message)(Vg_UserMsg,
"Valgrind has to exit now. Sorry. Bye!");
VG_(message)(Vg_UserMsg,
"");
VG_(pp_sched_status)();
VG_(exit)(1);
}
/* ---------------------------------------------------------------------
Sanity check machinery (permanently engaged).
------------------------------------------------------------------ */
/* A fast sanity check -- suitable for calling circa once per
millisecond. */
void VG_(do_sanity_checks) ( Bool force_expensive )
{
Int i;
VGP_PUSHCC(VgpCoreCheapSanity);
if (VG_(sanity_level) < 1) return;
/* --- First do all the tests that we can do quickly. ---*/
VG_(sanity_fast_count)++;
/* Check that we haven't overrun our private stack. */
for (i = 0; i < 10; i++) {
vg_assert(VG_(stack)[i]
== ((UInt)(&VG_(stack)[i]) ^ 0xA4B3C2D1));
vg_assert(VG_(stack)[VG_STACK_SIZE_W-1-i]
== ((UInt)(&VG_(stack)[VG_STACK_SIZE_W-i-1]) ^ 0xABCD4321));
}
/* Check stuff pertaining to the memory check system. */
/* Check that nobody has spuriously claimed that the first or
last 16 pages of memory have become accessible [...] */
if (VG_(needs).sanity_checks) {
VGP_PUSHCC(VgpSkinCheapSanity);
vg_assert(SK_(cheap_sanity_check)());
VGP_POPCC(VgpSkinCheapSanity);
}
/* --- Now some more expensive checks. ---*/
/* Once every 25 times, check some more expensive stuff. */
if ( force_expensive
|| VG_(sanity_level) > 1
|| (VG_(sanity_level) == 1 && (VG_(sanity_fast_count) % 25) == 0)) {
VGP_PUSHCC(VgpCoreExpensiveSanity);
VG_(sanity_slow_count)++;
VG_(proxy_sanity)();
# if 0
{ void zzzmemscan(void); zzzmemscan(); }
# endif
if ((VG_(sanity_fast_count) % 250) == 0)
VG_(sanity_check_tc_tt)();
if (VG_(needs).sanity_checks) {
VGP_PUSHCC(VgpSkinExpensiveSanity);
vg_assert(SK_(expensive_sanity_check)());
VGP_POPCC(VgpSkinExpensiveSanity);
}
/*
if ((VG_(sanity_fast_count) % 500) == 0) VG_(mallocSanityCheckAll)();
*/
VGP_POPCC(VgpCoreExpensiveSanity);
}
if (VG_(sanity_level) > 1) {
VGP_PUSHCC(VgpCoreExpensiveSanity);
/* Check sanity of the low-level memory manager. Note that bugs
in the client's code can cause this to fail, so we don't do
this check unless specially asked for. And because it's
potentially very expensive. */
VG_(mallocSanityCheckAll)();
VGP_POPCC(VgpCoreExpensiveSanity);
}
VGP_POPCC(VgpCoreCheapSanity);
}
/*--------------------------------------------------------------------*/
/*--- end vg_main.c ---*/
/*--------------------------------------------------------------------*/
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