| |
| /*--------------------------------------------------------------------*/ |
| /*--- 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) 2000-2002 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_fpustate) = 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_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_DAS) = INVALID_OFFSET; |
| Int VGOFF_(helper_DAA) = INVALID_OFFSET; |
| Int VGOFF_(handle_esp_assignment) = 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 8 |
| |
| 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]; |
| |
| |
| /* Words. */ |
| static Int baB_off = 0; |
| |
| /* 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; |
| } |
| |
| /* 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[]) |
| { |
| Int i; |
| for (i = 0; i < n; i++) offsets[i] = alloc_BaB_1_set( addrs[i] ); |
| } |
| |
| /* 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 */ |
| |
| /* (9 or 18) + n_compact_helpers */ |
| /* Register VG_(handle_esp_assignment) if needed. */ |
| if (VG_(track_events).new_mem_stack_aligned || |
| VG_(track_events).die_mem_stack_aligned) |
| VG_(register_compact_helper)( (Addr) & VG_(handle_esp_assignment) ); |
| |
| /* 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_fpustate) = alloc_BaB(VG_SIZE_OF_FPUSTATE_W); |
| |
| /* 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) ); |
| |
| /* 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_DAS) |
| = alloc_BaB_1_set( (Addr) & VG_(helper_DAS) ); |
| VGOFF_(helper_DAA) |
| = alloc_BaB_1_set( (Addr) & VG_(helper_DAA) ); |
| |
| /* 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) { |
| UInt eflags; |
| |
| SK_(written_shadow_regs_values) ( & VG_(written_shadow_reg), & eflags ); |
| 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)] = VG_(written_shadow_reg); |
| VG_(baseBlock)[VGOFF_(sh_eflags)] = eflags; |
| |
| } else { |
| VG_(written_shadow_reg) = VG_UNUSED_SHADOW_REG_VALUE; |
| } |
| } |
| |
| |
| /* --------------------------------------------------------------------- |
| 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)[10000]; |
| |
| /* Ditto our signal delivery stack. */ |
| UInt VG_(sigstack)[10000]; |
| |
| /* Saving stuff across system calls. */ |
| UInt VG_(real_fpu_state_saved_over_syscall)[VG_SIZE_OF_FPUSTATE_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); |
| |
| /* The current LRU epoch. */ |
| UInt VG_(current_epoch) = 0; |
| |
| /* 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. */ |
| UInt VG_(exitcode) = 0; |
| |
| |
| /* --------------------------------------------------------------------- |
| Counters, for informational purposes only. |
| ------------------------------------------------------------------ */ |
| |
| /* Number of lookups which miss the fast tt helper. */ |
| UInt VG_(tt_fast_misses) = 0; |
| |
| |
| /* Counts for LRU informational messages. */ |
| |
| /* Number and total o/t size of new translations this epoch. */ |
| UInt VG_(this_epoch_in_count) = 0; |
| UInt VG_(this_epoch_in_osize) = 0; |
| UInt VG_(this_epoch_in_tsize) = 0; |
| /* Number and total o/t size of discarded translations this epoch. */ |
| UInt VG_(this_epoch_out_count) = 0; |
| UInt VG_(this_epoch_out_osize) = 0; |
| UInt VG_(this_epoch_out_tsize) = 0; |
| /* 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 LRU-clearings of TT/TC. */ |
| UInt VG_(number_of_lrus) = 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; |
| |
| |
| /* --------------------------------------------------------------------- |
| Skin data structure initialisation |
| ------------------------------------------------------------------ */ |
| |
| /* Init with default values. */ |
| VgDetails VG_(details) = { |
| .name = NULL, |
| .version = NULL, |
| .description = NULL, |
| .copyright_author = NULL, |
| .bug_reports_to = NULL, |
| }; |
| |
| VgNeeds VG_(needs) = { |
| .core_errors = False, |
| .skin_errors = False, |
| .libc_freeres = False, |
| .sizeof_shadow_block = 0, |
| .basic_block_discards = False, |
| .shadow_regs = False, |
| .command_line_options = False, |
| .client_requests = False, |
| .extended_UCode = False, |
| .syscall_wrapper = False, |
| .alternative_free = False, |
| .sanity_checks = False, |
| }; |
| |
| VgTrackEvents VG_(track_events) = { |
| /* Memory events */ |
| .new_mem_startup = NULL, |
| .new_mem_heap = NULL, |
| .new_mem_stack = NULL, |
| .new_mem_stack_aligned = NULL, |
| .new_mem_stack_signal = NULL, |
| .new_mem_brk = NULL, |
| .new_mem_mmap = NULL, |
| |
| .copy_mem_heap = NULL, |
| .copy_mem_remap = NULL, |
| .change_mem_mprotect = NULL, |
| |
| .ban_mem_heap = NULL, |
| .ban_mem_stack = NULL, |
| |
| .die_mem_heap = NULL, |
| .die_mem_stack = NULL, |
| .die_mem_stack_aligned = NULL, |
| .die_mem_stack_signal = NULL, |
| .die_mem_brk = NULL, |
| .die_mem_munmap = NULL, |
| |
| .bad_free = NULL, |
| .mismatched_free = NULL, |
| |
| .pre_mem_read = NULL, |
| .pre_mem_read_asciiz = NULL, |
| .pre_mem_write = NULL, |
| .post_mem_write = NULL, |
| |
| /* Scheduler events */ |
| .thread_run = NULL, |
| |
| /* Mutex events */ |
| .post_mutex_lock = NULL, |
| .post_mutex_unlock = NULL, |
| }; |
| |
| static void sanity_check_needs ( void ) |
| { |
| #define CHECK_NOT(var, value) \ |
| if ((var)==(value)) { \ |
| VG_(printf)("\nSkin error: `%s' not initialised\n", \ |
| VG__STRING(var)); \ |
| VG_(skin_panic)("Uninitialised needs field\n"); \ |
| } |
| |
| CHECK_NOT(VG_(details).name, NULL); |
| /* Nb: .version can be NULL */ |
| CHECK_NOT(VG_(details).description, NULL); |
| CHECK_NOT(VG_(details).copyright_author, NULL); |
| CHECK_NOT(VG_(details).bug_reports_to, NULL); |
| |
| #undef CHECK_NOT |
| #undef INVALID_Bool |
| } |
| |
| /* --------------------------------------------------------------------- |
| Values derived from command-line options. |
| ------------------------------------------------------------------ */ |
| |
| /* Define, and set defaults. */ |
| Bool VG_(clo_error_limit) = True; |
| Bool VG_(clo_GDB_attach) = False; |
| Int VG_(sanity_level) = 1; |
| Int VG_(clo_verbosity) = 1; |
| Bool VG_(clo_demangle) = True; |
| Bool VG_(clo_sloppy_malloc) = False; |
| Int VG_(clo_alignment) = 4; |
| Bool VG_(clo_trace_children) = False; |
| Int VG_(clo_logfile_fd) = 2; |
| 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_malloc) = False; |
| Bool VG_(clo_trace_sched) = False; |
| Int VG_(clo_trace_pthread_level) = 0; |
| ULong VG_(clo_stop_after) = 1000000000000LL; |
| 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; |
| |
| /* 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); |
| |
| /* 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_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_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_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" |
| " --help show this message\n" |
| " --version show version\n" |
| " --skin=<name> main task (skin to use) [Valgrind]\n" |
| " -q --quiet run silently; only print error msgs\n" |
| " -v --verbose be more verbose, incl counts of errors\n" |
| " --gdb-attach=no|yes start GDB when errors detected? [no]\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" |
| " --sloppy-malloc=no|yes round malloc sizes to next word? [no]\n" |
| " --alignment=<number> set minimum alignment of allocations [4]\n" |
| " --trace-children=no|yes Valgrind-ise child processes? [no]\n" |
| " --run-libc-freeres=no|yes Free up glibc memory at exit? [yes]\n" |
| " --logfile-fd=<number> file descriptor for messages [2=stderr]\n" |
| " --suppressions=<filename> suppress errors described in\n" |
| " suppressions file <filename>\n" |
| " --weird-hacks=hack1,hack2,... [no hacks selected]\n" |
| " recognised hacks are: ioctl-VTIME truncate-writes lax-ioctls\n" |
| "\n" |
| " %s skin 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? (skin must be built for it) [no]\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-malloc=no|yes show client malloc details? [no]\n" |
| " --trace-sched=no|yes show thread scheduler details? [no]\n" |
| " --trace-pthread=none|some|all show pthread event details? [no]\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" |
| "\n" |
| " Extra options are read from env variable $VALGRIND_OPTS\n" |
| "\n" |
| " Valgrind is Copyright (C) 2000-2002 Julian Seward\n" |
| " and licensed under the GNU General Public License, version 2.\n" |
| " Bug reports, feedback, admiration, abuse, etc, to: %s.\n" |
| "\n" |
| " Skins are copyright and licensed by their authors. See each\n" |
| " skin'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) |
| VG_(printf)("%s", SK_(usage)()); |
| else |
| VG_(printf)(" (none)\n"); |
| VG_(printf)(usage2, VG_EMAIL_ADDR); |
| |
| VG_(shutdown_logging)(); |
| VG_(clo_logfile_fd) = 2; /* stderr */ |
| VG_(exit)(1); |
| } |
| |
| static void process_cmd_line_options ( void ) |
| { |
| Char* argv[M_VG_CMDLINE_OPTS]; |
| UInt argc; |
| Char* p; |
| Char* str; |
| Int i, eventually_logfile_fd, ctr; |
| |
| # define ISSPACE(cc) ((cc) == ' ' || (cc) == '\t' || (cc) == '\n') |
| # define STREQ(s1,s2) (0==VG_(strcmp_ws)((s1),(s2))) |
| # define STREQN(nn,s1,s2) (0==VG_(strncmp_ws)((s1),(s2),(nn))) |
| |
| eventually_logfile_fd = VG_(clo_logfile_fd); |
| |
| /* 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. */ |
| { |
| UInt* sp = 0; /* bogus init to keep gcc -O happy */ |
| |
| /* locate the top of the stack */ |
| if (VG_STACK_MATCHES_BASE( VG_(esp_at_startup), |
| VG_STARTUP_STACK_BASE_1 )) { |
| sp = (UInt*)VG_STARTUP_STACK_BASE_1; |
| } else |
| if (VG_STACK_MATCHES_BASE( VG_(esp_at_startup), |
| VG_STARTUP_STACK_BASE_2 )) { |
| sp = (UInt*)VG_STARTUP_STACK_BASE_2; |
| } else |
| if (VG_STACK_MATCHES_BASE( VG_(esp_at_startup), |
| VG_STARTUP_STACK_BASE_3 )) { |
| sp = (UInt*)VG_STARTUP_STACK_BASE_3; |
| } else |
| if (VG_STACK_MATCHES_BASE( VG_(esp_at_startup), |
| VG_STARTUP_STACK_BASE_4 )) { |
| sp = (UInt*)VG_STARTUP_STACK_BASE_4; |
| } else { |
| args_grok_error( |
| "startup %esp is not near any VG_STARTUP_STACK_BASE_*\n " |
| "constants defined in vg_include.h. You should investigate." |
| ); |
| } |
| |
| /* 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_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 |
| 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 >= 1000) |
| args_grok_error( |
| "suspiciously many (1000) 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 (STREQ(argv[i], "-v") || STREQ(argv[i], "--verbose")) |
| VG_(clo_verbosity)++; |
| else if (STREQ(argv[i], "-q") || STREQ(argv[i], "--quiet")) |
| VG_(clo_verbosity)--; |
| |
| else if (STREQ(argv[i], "--error-limit=yes")) |
| VG_(clo_error_limit) = True; |
| else if (STREQ(argv[i], "--error-limit=no")) |
| VG_(clo_error_limit) = False; |
| |
| else if (STREQ(argv[i], "--gdb-attach=yes")) |
| VG_(clo_GDB_attach) = True; |
| else if (STREQ(argv[i], "--gdb-attach=no")) |
| VG_(clo_GDB_attach) = False; |
| |
| else if (STREQ(argv[i], "--demangle=yes")) |
| VG_(clo_demangle) = True; |
| else if (STREQ(argv[i], "--demangle=no")) |
| VG_(clo_demangle) = False; |
| |
| else if (STREQ(argv[i], "--sloppy-malloc=yes")) |
| VG_(clo_sloppy_malloc) = True; |
| else if (STREQ(argv[i], "--sloppy-malloc=no")) |
| VG_(clo_sloppy_malloc) = False; |
| |
| else if (STREQN(12, argv[i], "--alignment=")) |
| VG_(clo_alignment) = (Int)VG_(atoll)(&argv[i][12]); |
| |
| else if (STREQ(argv[i], "--trace-children=yes")) |
| VG_(clo_trace_children) = True; |
| else if (STREQ(argv[i], "--trace-children=no")) |
| VG_(clo_trace_children) = False; |
| |
| else if (STREQ(argv[i], "--run-libc-freeres=yes")) |
| VG_(clo_run_libc_freeres) = True; |
| else if (STREQ(argv[i], "--run-libc-freeres=no")) |
| VG_(clo_run_libc_freeres) = False; |
| |
| else if (STREQN(15, argv[i], "--sanity-level=")) |
| VG_(sanity_level) = (Int)VG_(atoll)(&argv[i][15]); |
| |
| else if (STREQN(13, argv[i], "--logfile-fd=")) |
| eventually_logfile_fd = (Int)VG_(atoll)(&argv[i][13]); |
| |
| else if (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 (STREQ(argv[i], "--profile=yes")) |
| VG_(clo_profile) = True; |
| else if (STREQ(argv[i], "--profile=no")) |
| VG_(clo_profile) = False; |
| |
| else if (STREQ(argv[i], "--single-step=yes")) |
| VG_(clo_single_step) = True; |
| else if (STREQ(argv[i], "--single-step=no")) |
| VG_(clo_single_step) = False; |
| |
| else if (STREQ(argv[i], "--optimise=yes")) |
| VG_(clo_optimise) = True; |
| else if (STREQ(argv[i], "--optimise=no")) |
| VG_(clo_optimise) = False; |
| |
| /* "vwxyz" --> 000zyxwv (binary) */ |
| else if (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 (STREQ(argv[i], "--trace-syscalls=yes")) |
| VG_(clo_trace_syscalls) = True; |
| else if (STREQ(argv[i], "--trace-syscalls=no")) |
| VG_(clo_trace_syscalls) = False; |
| |
| else if (STREQ(argv[i], "--trace-signals=yes")) |
| VG_(clo_trace_signals) = True; |
| else if (STREQ(argv[i], "--trace-signals=no")) |
| VG_(clo_trace_signals) = False; |
| |
| else if (STREQ(argv[i], "--trace-symtab=yes")) |
| VG_(clo_trace_symtab) = True; |
| else if (STREQ(argv[i], "--trace-symtab=no")) |
| VG_(clo_trace_symtab) = False; |
| |
| else if (STREQ(argv[i], "--trace-malloc=yes")) |
| VG_(clo_trace_malloc) = True; |
| else if (STREQ(argv[i], "--trace-malloc=no")) |
| VG_(clo_trace_malloc) = False; |
| |
| else if (STREQ(argv[i], "--trace-sched=yes")) |
| VG_(clo_trace_sched) = True; |
| else if (STREQ(argv[i], "--trace-sched=no")) |
| VG_(clo_trace_sched) = False; |
| |
| else if (STREQ(argv[i], "--trace-pthread=none")) |
| VG_(clo_trace_pthread_level) = 0; |
| else if (STREQ(argv[i], "--trace-pthread=some")) |
| VG_(clo_trace_pthread_level) = 1; |
| else if (STREQ(argv[i], "--trace-pthread=all")) |
| VG_(clo_trace_pthread_level) = 2; |
| |
| else if (STREQN(14, argv[i], "--weird-hacks=")) |
| VG_(clo_weird_hacks) = &argv[i][14]; |
| |
| else if (STREQN(13, argv[i], "--stop-after=")) |
| VG_(clo_stop_after) = VG_(atoll)(&argv[i][13]); |
| |
| else if (STREQN(13, argv[i], "--dump-error=")) |
| VG_(clo_dump_error) = (Int)VG_(atoll)(&argv[i][13]); |
| |
| else if (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) < 2) |
| VG_(clo_backtrace_size) = 2; |
| 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 |
| # undef STREQ |
| # undef STREQN |
| |
| if (VG_(clo_verbosity < 0)) |
| VG_(clo_verbosity) = 0; |
| |
| if (VG_(clo_alignment) < 4 |
| || VG_(clo_alignment) > 4096 |
| || VG_(log2)( VG_(clo_alignment) ) == -1 /* not a power of 2 */) { |
| VG_(message)(Vg_UserMsg, ""); |
| VG_(message)(Vg_UserMsg, |
| "Invalid --alignment= setting. " |
| "Should be a power of 2, >= 4, <= 4096."); |
| VG_(bad_option)("--alignment"); |
| } |
| |
| 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"); |
| } |
| |
| VG_(clo_logfile_fd) = eventually_logfile_fd; |
| |
| 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 instrumentation system for x86-linux.", |
| VERSION); |
| VG_(message)(Vg_UserMsg, |
| "Copyright (C) 2000-2002, and GNU GPL'd, by Julian Seward."); |
| } |
| |
| if (VG_(clo_verbosity) > 1) { |
| 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."); |
| } |
| } |
| |
| /* --------------------------------------------------------------------- |
| Copying to/from m_state_static. |
| ------------------------------------------------------------------ */ |
| |
| UInt VG_(m_state_static) [6 /* segment regs, Intel order */ |
| + 8 /* int regs, in Intel order */ |
| + 1 /* %eflags */ |
| + 1 /* %eip */ |
| + VG_SIZE_OF_FPUSTATE_W /* FPU state */ |
| ]; |
| |
| 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_(baseBlock)[VGOFF_(m_eflags)]; |
| VG_(m_state_static)[60/4] = VG_(baseBlock)[VGOFF_(m_eip)]; |
| |
| for (i = 0; i < VG_SIZE_OF_FPUSTATE_W; i++) |
| VG_(m_state_static)[64/4 + i] |
| = VG_(baseBlock)[VGOFF_(m_fpustate) + 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]; |
| VG_(baseBlock)[VGOFF_(m_eip)] = VG_(m_state_static)[60/4]; |
| |
| for (i = 0; i < VG_SIZE_OF_FPUSTATE_W; i++) |
| VG_(baseBlock)[VGOFF_(m_fpustate) + 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)(Addr a) |
| { |
| if (a >= ((Addr)(&VG_(m_state_static))) |
| && a <= ((Addr)(&VG_(m_state_static))) + sizeof(VG_(m_state_static))) |
| return True; |
| else |
| 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, |
| " lru: %d epochs, %d clearings.", |
| VG_(current_epoch), |
| VG_(number_of_lrus) ); |
| 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: %lu basic blocks, %d/%d sched events, %d tt_fast misses.", |
| VG_(bbs_done), 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! |
| ------------------------------------------------------------------ */ |
| |
| /* 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; |
| ThreadState* tst; |
| |
| /* Set up our stack sanity-check words. */ |
| for (i = 0; i < 10; i++) { |
| VG_(stack)[i] = (UInt)(&VG_(stack)[i]) ^ 0xA4B3C2D1; |
| VG_(stack)[10000-1-i] = (UInt)(&VG_(stack)[10000-i-1]) ^ 0xABCD4321; |
| } |
| |
| /* 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_(details), & VG_(needs), & VG_(track_events) ); |
| sanity_check_needs(); |
| |
| /* Process Valgrind's command-line opts (from env var VG_ARGS). */ |
| process_cmd_line_options(); |
| |
| /* Do post command-line processing initialisation */ |
| SK_(post_clo_init)(); |
| |
| /* Set up baseBlock offsets and copy the saved machine's state into it. |
| Comes after SK_(post_clo_init) in case it registers helpers. */ |
| vg_init_baseBlock(); |
| |
| /* Hook to delay things long enough so we can get the pid and |
| attach GDB in another shell. */ |
| if (0) { |
| Int p, q; |
| for (p = 0; p < 50000; p++) |
| for (q = 0; q < 50000; q++) ; |
| } |
| |
| /* Initialise the scheduler, and copy the client's state from |
| baseBlock into VG_(threads)[1]. This has to come before signal |
| initialisations. */ |
| VG_(scheduler_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)(); |
| |
| /* Must come after SK_(init) so memory handler accompaniments (eg. |
| * shadow memory) can be setup ok */ |
| 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)(); |
| |
| /* This should come after init_memory_and_symbols(); otherwise the |
| latter carefully sets up the permissions maps to cover the |
| anonymous mmaps for the translation table and translation cache, |
| which wastes > 20M of virtual address space. */ |
| VG_(init_tt_tc)(); |
| |
| if (VG_(clo_verbosity) == 1) { |
| VG_(message)(Vg_UserMsg, |
| "For more details, rerun with: -v"); |
| } |
| |
| /* 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); |
| src = VG_(scheduler)(); |
| 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"); |
| } |
| |
| if (VG_(needs).core_errors || VG_(needs).skin_errors) |
| VG_(show_all_errors)(); |
| |
| SK_(fini)(); |
| |
| VG_(do_sanity_checks)( True /*include expensive checks*/ ); |
| |
| if (VG_(clo_verbosity) > 1) |
| vg_show_counts(); |
| |
| if (VG_(clo_verbosity) > 2) |
| 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. */ |
| if (!VG_(clo_trace_children)) { |
| VG_(mash_LD_PRELOAD_and_LD_LIBRARY_PATH)( |
| VG_(getenv)("LD_PRELOAD"), |
| VG_(getenv)("LD_LIBRARY_PATH") |
| ); |
| } |
| |
| /* 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); |
| tst = & VG_(threads)[VG_(last_run_tid)]; |
| vg_assert(tst->status == VgTs_Runnable); |
| /* 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_(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_(load_thread_state)(1 /* root thread */ ); |
| VG_(copy_baseBlock_to_m_state_static)(); |
| |
| /* 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)(); |
| |
| 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. |
| */ |
| void VG_(mash_LD_PRELOAD_and_LD_LIBRARY_PATH) ( Char* ld_preload_str, |
| Char* ld_library_path_str ) |
| { |
| Char* p_prel = NULL; |
| Char* sk_prel = NULL; |
| Char* p_path = NULL; |
| Int what = 0; |
| if (ld_preload_str == NULL || ld_library_path_str == NULL) |
| goto mutancy; |
| |
| /* VG_(printf)("%s %s\n", ld_preload_str, ld_library_path_str); */ |
| |
| p_prel = VG_(strstr)(ld_preload_str, "valgrind.so"); |
| sk_prel = VG_(strstr)(ld_preload_str, "vgskin_"); |
| p_path = VG_(strstr)(ld_library_path_str, VG_LIBDIR); |
| |
| what = 1; |
| if (p_prel == NULL) { |
| /* perhaps already happened? */ |
| if (VG_(strstr)(ld_preload_str, "valgrinq.so") == NULL) |
| goto mutancy; |
| if (VG_(strstr)(ld_library_path_str, "lib/valgrinq") == NULL) |
| goto mutancy; |
| return; |
| } |
| |
| what = 2; |
| if (sk_prel == NULL) goto mutancy; |
| |
| what = 3; |
| if (p_path == NULL) goto mutancy; |
| |
| what = 4; |
| { |
| /* Blank from "vgskin_" back to prev. LD_PRELOAD entry, or start */ |
| Char* p = sk_prel; |
| while (*p != ':' && p > ld_preload_str) { |
| *p = ' '; |
| p--; |
| } |
| /* Blank from "vgskin_" to next LD_PRELOAD entry */ |
| while (*p != ':' && *p != '\0') { |
| *p = ' '; |
| p++; |
| } |
| if (*p == '\0') goto mutancy; /* valgrind.so has disappeared?! */ |
| *p = ' '; /* blank ending ':' */ |
| } |
| |
| /* in LD_PRELOAD, turn valgrind.so into valgrinq.so. */ |
| what = 5; |
| if (p_prel[7] != 'd') goto mutancy; |
| p_prel[7] = 'q'; |
| |
| /* in LD_LIBRARY_PATH, turn $libdir/valgrind (as configure'd) from |
| .../lib/valgrind .../lib/valgrinq, which doesn't exist, |
| so that our own libpthread.so goes out of scope. */ |
| p_path += VG_(strlen)(VG_LIBDIR); |
| what = 6; |
| if (p_path[0] != '/') goto mutancy; |
| p_path++; /* step over / */ |
| what = 7; |
| if (p_path[7] != 'd') goto mutancy; |
| p_path[7] = 'q'; |
| 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" |
| " p_prel = `%s'\n" |
| " p_path = `%s'\n" |
| " VG_LIBDIR = `%s'\n", |
| what, ld_preload_str, ld_library_path_str, |
| p_prel, p_path, 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, |
| "/usr/bin/gdb -nw /proc/%d/exe %d", |
| 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 me know"); |
| VG_(message)(Vg_UserMsg, |
| "(jseward@acm.org) and/or try to work around the problem, if you can."); |
| 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)[10000-1-i] |
| == ((UInt)(&VG_(stack)[10000-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)++; |
| |
| # 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 ---*/ |
| /*--------------------------------------------------------------------*/ |