| |
| /*--------------------------------------------------------------------*/ |
| /*--- The only header your skin will ever need to #include... ---*/ |
| /*--- vg_skin.h ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, an x86 protected-mode emulator |
| designed for debugging and profiling binaries 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. |
| */ |
| |
| #ifndef __VG_SKIN_H |
| #define __VG_SKIN_H |
| |
| #include <stdarg.h> /* ANSI varargs stuff */ |
| #include <setjmp.h> /* for jmp_buf */ |
| |
| #include "vg_constants_skin.h" |
| |
| |
| /*====================================================================*/ |
| /*=== Build options and table sizes. ===*/ |
| /*====================================================================*/ |
| |
| /* You should be able to change these options or sizes, recompile, and |
| still have a working system. */ |
| |
| /* The maximum number of pthreads that we support. This is |
| deliberately not very high since our implementation of some of the |
| scheduler algorithms is surely O(N) in the number of threads, since |
| that's simple, at least. And (in practice) we hope that most |
| programs do not need many threads. */ |
| #define VG_N_THREADS 50 |
| |
| /* Maximum number of pthread keys available. Again, we start low until |
| the need for a higher number presents itself. */ |
| #define VG_N_THREAD_KEYS 50 |
| |
| /* Total number of integer registers available for allocation -- all of |
| them except %esp, %ebp. %ebp permanently points at VG_(baseBlock). |
| |
| If you change this you'll have to also change at least these: |
| - VG_(rankToRealRegNum)() |
| - VG_(realRegNumToRank)() |
| - ppRegsLiveness() |
| - the RegsLive type (maybe -- RegsLive type must have more than |
| VG_MAX_REALREGS bits) |
| |
| Do not change this unless you really know what you are doing! */ |
| #define VG_MAX_REALREGS 6 |
| |
| |
| /*====================================================================*/ |
| /*=== Basic types ===*/ |
| /*====================================================================*/ |
| |
| #define mycat_wrk(aaa,bbb) aaa##bbb |
| #define mycat(aaa,bbb) mycat_wrk(aaa,bbb) |
| |
| typedef unsigned char UChar; |
| typedef unsigned short UShort; |
| typedef unsigned int UInt; |
| typedef unsigned long long int ULong; |
| |
| typedef signed char Char; |
| typedef signed short Short; |
| typedef signed int Int; |
| typedef signed long long int Long; |
| |
| typedef unsigned int Addr; |
| |
| typedef unsigned char Bool; |
| #define False ((Bool)0) |
| #define True ((Bool)1) |
| |
| |
| /* --------------------------------------------------------------------- |
| Now the basic types are set up, we can haul in the kernel-interface |
| definitions. |
| ------------------------------------------------------------------ */ |
| |
| #include "../coregrind/vg_kerneliface.h" |
| |
| |
| /*====================================================================*/ |
| /*=== Command-line options ===*/ |
| /*====================================================================*/ |
| |
| /* Verbosity level: 0 = silent, 1 (default), > 1 = more verbose. */ |
| extern Int VG_(clo_verbosity); |
| |
| /* Profile? */ |
| extern Bool VG_(clo_profile); |
| |
| |
| /* Call this if a recognised option was bad for some reason. |
| Note: don't use it just because an option was unrecognised -- return 'False' |
| from SKN_(process_cmd_line_option) to indicate that. */ |
| extern void VG_(bad_option) ( Char* opt ); |
| |
| /* Client args */ |
| extern Int VG_(client_argc); |
| extern Char** VG_(client_argv); |
| |
| /* Client environment. Can be inspected with VG_(getenv)() (below) */ |
| extern Char** VG_(client_envp); |
| |
| |
| /*====================================================================*/ |
| /*=== Printing messages for the user ===*/ |
| /*====================================================================*/ |
| |
| /* Print a message prefixed by "??<pid>?? "; '?' depends on the VgMsgKind. |
| Should be used for all user output. */ |
| |
| typedef |
| enum { Vg_UserMsg, /* '?' == '=' */ |
| Vg_DebugMsg, /* '?' == '-' */ |
| Vg_DebugExtraMsg /* '?' == '+' */ |
| } |
| VgMsgKind; |
| |
| /* Functions for building a message from multiple parts. */ |
| extern void VG_(start_msg) ( VgMsgKind kind ); |
| extern void VG_(add_to_msg) ( Char* format, ... ); |
| /* Ends and prints the message. Appends a newline. */ |
| extern void VG_(end_msg) ( void ); |
| |
| /* Send a simple, single-part message. Appends a newline. */ |
| extern void VG_(message) ( VgMsgKind kind, Char* format, ... ); |
| |
| |
| /*====================================================================*/ |
| /*=== Profiling ===*/ |
| /*====================================================================*/ |
| |
| /* Nb: VGP_(register_profile_event)() relies on VgpUnc being the first one */ |
| #define VGP_CORE_LIST \ |
| /* These ones depend on the core */ \ |
| VGP_PAIR(VgpUnc, "unclassified"), \ |
| VGP_PAIR(VgpRun, "running"), \ |
| VGP_PAIR(VgpSched, "scheduler"), \ |
| VGP_PAIR(VgpMalloc, "low-lev malloc/free"), \ |
| VGP_PAIR(VgpCliMalloc, "client malloc/free"), \ |
| VGP_PAIR(VgpStack, "adjust-stack"), \ |
| VGP_PAIR(VgpTranslate, "translate-main"), \ |
| VGP_PAIR(VgpToUCode, "to-ucode"), \ |
| VGP_PAIR(VgpFromUcode, "from-ucode"), \ |
| VGP_PAIR(VgpImprove, "improve"), \ |
| VGP_PAIR(VgpRegAlloc, "reg-alloc"), \ |
| VGP_PAIR(VgpLiveness, "liveness-analysis"), \ |
| VGP_PAIR(VgpDoLRU, "do-lru"), \ |
| VGP_PAIR(VgpSlowFindT, "slow-search-transtab"), \ |
| VGP_PAIR(VgpInitMem, "init-memory"), \ |
| VGP_PAIR(VgpExeContext, "exe-context"), \ |
| VGP_PAIR(VgpReadSyms, "read-syms"), \ |
| VGP_PAIR(VgpSearchSyms, "search-syms"), \ |
| VGP_PAIR(VgpAddToT, "add-to-transtab"), \ |
| VGP_PAIR(VgpCoreSysWrap, "core-syscall-wrapper"), \ |
| VGP_PAIR(VgpDemangle, "demangle"), \ |
| /* These ones depend on the skin */ \ |
| VGP_PAIR(VgpPreCloInit, "pre-clo-init"), \ |
| VGP_PAIR(VgpPostCloInit, "post-clo-init"), \ |
| VGP_PAIR(VgpInstrument, "instrument"), \ |
| VGP_PAIR(VgpSkinSysWrap, "skin-syscall-wrapper"), \ |
| VGP_PAIR(VgpFini, "fini") |
| |
| #define VGP_PAIR(n,name) n |
| typedef enum { VGP_CORE_LIST } VgpCoreCC; |
| #undef VGP_PAIR |
| |
| /* When registering skin profiling events, ensure that the 'n' value is in |
| * the range (VgpFini+1..) */ |
| extern void VGP_(register_profile_event) ( Int n, Char* name ); |
| |
| extern void VGP_(pushcc) ( UInt cc ); |
| extern void VGP_(popcc) ( UInt cc ); |
| |
| /* Define them only if they haven't already been defined by vg_profile.c */ |
| #ifndef VGP_PUSHCC |
| # define VGP_PUSHCC(x) |
| #endif |
| #ifndef VGP_POPCC |
| # define VGP_POPCC(x) |
| #endif |
| |
| |
| /*====================================================================*/ |
| /*=== Useful stuff to call from generated code ===*/ |
| /*====================================================================*/ |
| |
| /* ------------------------------------------------------------------ */ |
| /* General stuff */ |
| |
| /* Get the simulated %esp */ |
| extern Addr VG_(get_stack_pointer) ( void ); |
| |
| /* Detect if an address is within Valgrind's stack */ |
| extern Bool VG_(within_stack)(Addr a); |
| |
| /* Detect if an address is in Valgrind's m_state_static */ |
| extern Bool VG_(within_m_state_static)(Addr a); |
| |
| /* Check if an address is 4-byte aligned */ |
| #define IS_ALIGNED4_ADDR(aaa_p) (0 == (((UInt)(aaa_p)) & 3)) |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Thread-related stuff */ |
| |
| /* Special magic value for an invalid ThreadId. It corresponds to |
| LinuxThreads using zero as the initial value for |
| pthread_mutex_t.__m_owner and pthread_cond_t.__c_waiting. */ |
| #define VG_INVALID_THREADID ((ThreadId)(0)) |
| |
| /* ThreadIds are simply indices into the vg_threads[] array. */ |
| typedef |
| UInt |
| ThreadId; |
| |
| typedef |
| struct _ThreadState |
| ThreadState; |
| |
| extern ThreadId VG_(get_current_tid_1_if_root) ( void ); |
| extern ThreadState* VG_(get_ThreadState) ( ThreadId tid ); |
| |
| |
| /*====================================================================*/ |
| /*=== Valgrind's version of libc ===*/ |
| /*====================================================================*/ |
| |
| /* Valgrind doesn't use libc at all, for good reasons (trust us). So here |
| are its own versions of C library functions, but with VG_ prefixes. Note |
| that the types of some are slightly different to the real ones. Some |
| extra useful functions are provided too; descriptions of how they work |
| are given below. */ |
| |
| #if !defined(NULL) |
| # define NULL ((void*)0) |
| #endif |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* stdio.h |
| * |
| * Note that they all output to the file descriptor given by the |
| * --logfile-fd=N argument, which defaults to 2 (stderr). Hence no |
| * need for VG_(fprintf)(). |
| * |
| * Also note that VG_(printf)() and VG_(vprintf)() |
| */ |
| extern void VG_(printf) ( const char *format, ... ); |
| /* too noisy ... __attribute__ ((format (printf, 1, 2))) ; */ |
| extern void VG_(sprintf) ( Char* buf, Char *format, ... ); |
| extern void VG_(vprintf) ( void(*send)(Char), |
| const Char *format, va_list vargs ); |
| |
| /* ------------------------------------------------------------------ */ |
| /* stdlib.h */ |
| |
| extern void* VG_(malloc) ( Int nbytes ); |
| extern void VG_(free) ( void* ptr ); |
| extern void* VG_(calloc) ( Int nmemb, Int nbytes ); |
| extern void* VG_(realloc) ( void* ptr, Int size ); |
| extern void* VG_(malloc_aligned) ( Int req_alignB, Int req_pszB ); |
| |
| extern void VG_(print_malloc_stats) ( void ); |
| |
| |
| extern void VG_(exit)( Int status ) |
| __attribute__ ((__noreturn__)); |
| /* Print a (panic) message (constant string) appending newline, and abort. */ |
| extern void VG_(panic) ( Char* str ) |
| __attribute__ ((__noreturn__)); |
| |
| /* Looks up VG_(client_envp) (above) */ |
| extern Char* VG_(getenv) ( Char* name ); |
| |
| /* Crude stand-in for the glibc system() call. */ |
| extern Int VG_(system) ( Char* cmd ); |
| |
| extern Long VG_(atoll) ( Char* str ); |
| |
| /* Like atoll(), but converts a number of base 2..36 */ |
| extern Long VG_(atoll36) ( UInt base, Char* str ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* ctype.h functions and related */ |
| extern Bool VG_(isspace) ( Char c ); |
| extern Bool VG_(isdigit) ( Char c ); |
| extern Char VG_(toupper) ( Char c ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* string.h */ |
| extern Int VG_(strlen) ( const Char* str ); |
| extern Char* VG_(strcat) ( Char* dest, const Char* src ); |
| extern Char* VG_(strncat) ( Char* dest, const Char* src, Int n ); |
| extern Char* VG_(strpbrk) ( const Char* s, const Char* accept ); |
| extern Char* VG_(strcpy) ( Char* dest, const Char* src ); |
| extern Char* VG_(strncpy) ( Char* dest, const Char* src, Int ndest ); |
| extern Int VG_(strcmp) ( const Char* s1, const Char* s2 ); |
| extern Int VG_(strncmp) ( const Char* s1, const Char* s2, Int nmax ); |
| extern Char* VG_(strstr) ( const Char* haystack, Char* needle ); |
| extern Char* VG_(strchr) ( const Char* s, Char c ); |
| extern Char* VG_(strdup) ( const Char* s); |
| |
| /* Like strcmp(), but stops comparing at any whitespace. */ |
| extern Int VG_(strcmp_ws) ( const Char* s1, const Char* s2 ); |
| |
| /* Like strncmp(), but stops comparing at any whitespace. */ |
| extern Int VG_(strncmp_ws) ( const Char* s1, const Char* s2, Int nmax ); |
| |
| /* Like strncpy(), but if 'src' is longer than 'ndest' inserts a '\0' at the |
| Nth character. */ |
| extern void VG_(strncpy_safely) ( Char* dest, const Char* src, Int ndest ); |
| |
| /* Mini-regexp function. Searches for 'pat' in 'str'. Supports |
| * meta-symbols '*' and '?'. '\' escapes meta-symbols. */ |
| extern Bool VG_(stringMatch) ( Char* pat, Char* str ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* math.h */ |
| /* Returns the base-2 logarithm of its argument. */ |
| extern Int VG_(log2) ( Int x ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* unistd.h */ |
| extern Int VG_(getpid) ( void ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* assert.h */ |
| /* Asserts permanently enabled -- no turning off with NDEBUG. Hurrah! */ |
| #define VG__STRING(__str) #__str |
| |
| #define vg_assert(expr) \ |
| ((void) ((expr) ? 0 : \ |
| (VG_(assert_fail) (VG__STRING(expr), \ |
| __FILE__, __LINE__, \ |
| __PRETTY_FUNCTION__), 0))) |
| |
| extern void VG_(assert_fail) ( Char* expr, Char* file, |
| Int line, Char* fn ) |
| __attribute__ ((__noreturn__)); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Reading and writing files. */ |
| |
| /* As per the system calls */ |
| extern Int VG_(open) ( const Char* pathname, Int flags, Int mode ); |
| extern Int VG_(read) ( Int fd, void* buf, Int count); |
| extern Int VG_(write) ( Int fd, void* buf, Int count); |
| extern void VG_(close) ( Int fd ); |
| |
| extern Int VG_(stat) ( Char* file_name, struct vki_stat* buf ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* mmap and related functions ... */ |
| extern void* VG_(mmap)( void* start, UInt length, |
| UInt prot, UInt flags, UInt fd, UInt offset ); |
| extern Int VG_(munmap)( void* start, Int length ); |
| |
| /* Get memory by anonymous mmap. */ |
| extern void* VG_(get_memory_from_mmap) ( Int nBytes, Char* who ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* signal.h. |
| |
| Note that these use the vk_ (kernel) structure |
| definitions, which are different in places from those that glibc |
| defines -- hence the 'k' prefix. Since we're operating right at the |
| kernel interface, glibc's view of the world is entirely irrelevant. */ |
| |
| /* --- Signal set ops --- */ |
| extern Int VG_(ksigfillset)( vki_ksigset_t* set ); |
| extern Int VG_(ksigemptyset)( vki_ksigset_t* set ); |
| |
| extern Bool VG_(kisfullsigset)( vki_ksigset_t* set ); |
| extern Bool VG_(kisemptysigset)( vki_ksigset_t* set ); |
| |
| extern Int VG_(ksigaddset)( vki_ksigset_t* set, Int signum ); |
| extern Int VG_(ksigdelset)( vki_ksigset_t* set, Int signum ); |
| extern Int VG_(ksigismember) ( vki_ksigset_t* set, Int signum ); |
| |
| extern void VG_(ksigaddset_from_set)( vki_ksigset_t* dst, |
| vki_ksigset_t* src ); |
| extern void VG_(ksigdelset_from_set)( vki_ksigset_t* dst, |
| vki_ksigset_t* src ); |
| |
| /* --- Mess with the kernel's sig state --- */ |
| extern Int VG_(ksigprocmask)( Int how, const vki_ksigset_t* set, |
| vki_ksigset_t* oldset ); |
| extern Int VG_(ksigaction) ( Int signum, |
| const vki_ksigaction* act, |
| vki_ksigaction* oldact ); |
| |
| extern Int VG_(ksignal)(Int signum, void (*sighandler)(Int)); |
| |
| extern Int VG_(ksigaltstack)( const vki_kstack_t* ss, vki_kstack_t* oss ); |
| |
| extern Int VG_(kill)( Int pid, Int signo ); |
| extern Int VG_(sigpending) ( vki_ksigset_t* set ); |
| |
| |
| /*====================================================================*/ |
| /*=== UCode definition ===*/ |
| /*====================================================================*/ |
| |
| /* Tags which describe what operands are. */ |
| typedef |
| enum { TempReg=0, ArchReg=1, RealReg=2, |
| SpillNo=3, Literal=4, Lit16=5, |
| NoValue=6 } |
| Tag; |
| |
| /* Invalid register numbers :-) */ |
| #define INVALID_TEMPREG 999999999 |
| #define INVALID_REALREG 999999999 |
| |
| /* Microinstruction opcodes. */ |
| typedef |
| enum { |
| NOP, |
| GET, |
| PUT, |
| LOAD, |
| STORE, |
| MOV, |
| CMOV, /* Used for cmpxchg and cmov */ |
| WIDEN, |
| JMP, |
| |
| /* Read/write the %EFLAGS register into a TempReg. */ |
| GETF, PUTF, |
| |
| ADD, ADC, AND, OR, XOR, SUB, SBB, |
| SHL, SHR, SAR, ROL, ROR, RCL, RCR, |
| NOT, NEG, INC, DEC, BSWAP, |
| CC2VAL, |
| |
| /* Not strictly needed, but useful for making better |
| translations of address calculations. */ |
| LEA1, /* reg2 := const + reg1 */ |
| LEA2, /* reg3 := const + reg1 + reg2 * 1,2,4 or 8 */ |
| |
| /* not for translating x86 calls -- only to call helpers */ |
| CALLM_S, CALLM_E, /* Mark start and end of push/pop sequences |
| for CALLM. */ |
| PUSH, POP, CLEAR, /* Add/remove/zap args for helpers. */ |
| CALLM, /* call to a machine-code helper */ |
| |
| /* For calling C functions of up to three arguments (or two if the |
| functions has a return value). Arguments and return value must be |
| word-sized. If you want to pass more arguments than this to a C |
| function you have to use global variables to fake it (eg. use |
| VG_(set_global_var)()). |
| |
| Seven possibilities: 'arg1..3' show where args go, 'ret' shows |
| where return values go. |
| |
| CCALL(-, -, - ) void f(void) |
| CCALL(arg1, -, - ) void f(UInt arg1) |
| CCALL(arg1, arg2, - ) void f(UInt arg1, UInt arg2) |
| CCALL(arg1, arg2, arg3) void f(UInt arg1, UInt arg2, UInt arg3) |
| CCALL(-, -, ret ) UInt f(UInt) |
| CCALL(arg1, -, ret ) UInt f(UInt arg1) |
| CCALL(arg1, arg2, ret ) UInt f(UInt arg1, UInt arg2) |
| */ |
| CCALL, |
| |
| /* Hack for translating string (REP-) insns. Jump to literal if |
| TempReg/RealReg is zero. */ |
| JIFZ, |
| |
| /* FPU ops which read/write mem or don't touch mem at all. */ |
| FPU_R, |
| FPU_W, |
| FPU, |
| |
| /* Advance the simulated %eip by some small (< 128) number. */ |
| INCEIP, |
| |
| /* Makes it easy for extended-UCode ops by doing: |
| |
| enum { EU_OP1 = DUMMY_FINAL_OP + 1, ... } |
| |
| WARNING: Do not add new opcodes after this one! They can be added |
| before, though. */ |
| DUMMY_FINAL_UOPCODE |
| } |
| Opcode; |
| |
| |
| /* Condition codes, observing the Intel encoding. CondAlways is an |
| extra. */ |
| typedef |
| enum { |
| CondO = 0, /* overflow */ |
| CondNO = 1, /* no overflow */ |
| CondB = 2, /* below */ |
| CondNB = 3, /* not below */ |
| CondZ = 4, /* zero */ |
| CondNZ = 5, /* not zero */ |
| CondBE = 6, /* below or equal */ |
| CondNBE = 7, /* not below or equal */ |
| CondS = 8, /* negative */ |
| ConsNS = 9, /* not negative */ |
| CondP = 10, /* parity even */ |
| CondNP = 11, /* not parity even */ |
| CondL = 12, /* jump less */ |
| CondNL = 13, /* not less */ |
| CondLE = 14, /* less or equal */ |
| CondNLE = 15, /* not less or equal */ |
| CondAlways = 16 /* Jump always */ |
| } |
| Condcode; |
| |
| |
| /* Descriptions of additional properties of *unconditional* jumps. */ |
| typedef |
| enum { |
| JmpBoring=0, /* boring unconditional jump */ |
| JmpCall=1, /* jump due to an x86 call insn */ |
| JmpRet=2, /* jump due to an x86 ret insn */ |
| JmpSyscall=3, /* do a system call, then jump */ |
| JmpClientReq=4 /* do a client request, then jump */ |
| } |
| JmpKind; |
| |
| |
| /* Flags. User-level code can only read/write O(verflow), S(ign), |
| Z(ero), A(ux-carry), C(arry), P(arity), and may also write |
| D(irection). That's a total of 7 flags. A FlagSet is a bitset, |
| thusly: |
| 76543210 |
| DOSZACP |
| and bit 7 must always be zero since it is unused. |
| */ |
| typedef UChar FlagSet; |
| |
| #define FlagD (1<<6) |
| #define FlagO (1<<5) |
| #define FlagS (1<<4) |
| #define FlagZ (1<<3) |
| #define FlagA (1<<2) |
| #define FlagC (1<<1) |
| #define FlagP (1<<0) |
| |
| #define FlagsOSZACP (FlagO | FlagS | FlagZ | FlagA | FlagC | FlagP) |
| #define FlagsOSZAP (FlagO | FlagS | FlagZ | FlagA | FlagP) |
| #define FlagsOSZCP (FlagO | FlagS | FlagZ | FlagC | FlagP) |
| #define FlagsOSACP (FlagO | FlagS | FlagA | FlagC | FlagP) |
| #define FlagsSZACP ( FlagS | FlagZ | FlagA | FlagC | FlagP) |
| #define FlagsSZAP ( FlagS | FlagZ | FlagA | FlagP) |
| #define FlagsZCP ( FlagZ | FlagC | FlagP) |
| #define FlagsOC (FlagO | FlagC ) |
| #define FlagsAC ( FlagA | FlagC ) |
| |
| #define FlagsALL (FlagsOSZACP | FlagD) |
| #define FlagsEmpty (FlagSet)0 |
| |
| |
| /* Liveness of general purpose registers, useful for code generation. |
| Reg rank order 0..N-1 corresponds to bits 0..N-1, ie. first |
| reg's liveness in bit 0, last reg's in bit N-1. Note that |
| these rankings don't match the Intel register ordering. */ |
| typedef UInt RRegSet; |
| |
| #define ALL_RREGS_DEAD 0 /* 0000...00b */ |
| #define ALL_RREGS_LIVE (1 << (VG_MAX_REALREGS-1)) /* 0011...11b */ |
| #define UNIT_RREGSET(rank) (1 << (rank)) |
| |
| #define IS_RREG_LIVE(rank,rregs_live) (rregs_live & UNIT_RREGSET(rank)) |
| #define SET_RREG_LIVENESS(rank,rregs_live,b) \ |
| do { RRegSet unit = UNIT_RREGSET(rank); \ |
| if (b) rregs_live |= unit; \ |
| else rregs_live &= ~unit; \ |
| } while(0) |
| |
| |
| /* A Micro (u)-instruction. */ |
| typedef |
| struct { |
| /* word 1 */ |
| UInt lit32; /* 32-bit literal */ |
| |
| /* word 2 */ |
| UShort val1; /* first operand */ |
| UShort val2; /* second operand */ |
| |
| /* word 3 */ |
| UShort val3; /* third operand */ |
| UChar opcode; /* opcode */ |
| UChar size; /* data transfer size */ |
| |
| /* word 4 */ |
| FlagSet flags_r; /* :: FlagSet */ |
| FlagSet flags_w; /* :: FlagSet */ |
| UChar tag1:4; /* first operand tag */ |
| UChar tag2:4; /* second operand tag */ |
| UChar tag3:4; /* third operand tag */ |
| UChar extra4b:4; /* Spare field, used by WIDEN for src |
| -size, and by LEA2 for scale (1,2,4 or 8), |
| and by JMPs for original x86 instr size */ |
| |
| /* word 5 */ |
| UChar cond; /* condition, for jumps */ |
| Bool signed_widen:1; /* signed or unsigned WIDEN ? */ |
| JmpKind jmpkind:3; /* additional properties of unconditional JMP */ |
| |
| /* Additional properties for UInstrs that call C functions: |
| - CCALL |
| - PUT (when %ESP is the target) |
| - possibly skin-specific UInstrs |
| */ |
| UChar argc:2; /* Number of args, max 3 */ |
| UChar regparms_n:2; /* Number of args passed in registers */ |
| Bool has_ret_val:1; /* Function has return value? */ |
| |
| /* RealReg liveness; only sensical after reg alloc and liveness |
| analysis done. This info is a little bit arch-specific -- |
| VG_MAX_REALREGS can vary on different architectures. Note that |
| to use this information requires converting between register ranks |
| and the Intel register numbers, using VG_(realRegNumToRank)() |
| and/or VG_(rankToRealRegNum)() */ |
| RRegSet regs_live_after:VG_MAX_REALREGS; |
| } |
| UInstr; |
| |
| |
| /* Expandable arrays of uinstrs. */ |
| typedef |
| struct { |
| Int used; |
| Int size; |
| UInstr* instrs; |
| Int nextTemp; |
| } |
| UCodeBlock; |
| |
| |
| /*====================================================================*/ |
| /*=== Instrumenting UCode ===*/ |
| /*====================================================================*/ |
| |
| /* A structure for communicating TempReg and RealReg uses of UInstrs. */ |
| typedef |
| struct { |
| Int num; |
| Bool isWrite; |
| } |
| RegUse; |
| |
| /* Find what this instruction does to its regs. Tag indicates whether we're |
| * considering TempRegs (pre-reg-alloc) or RealRegs (post-reg-alloc). |
| * Useful for analysis/optimisation passes. */ |
| extern Int VG_(getRegUsage) ( UInstr* u, Tag tag, RegUse* arr ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Used to register helper functions to be called from generated code */ |
| extern void VG_(register_compact_helper) ( Addr a ); |
| extern void VG_(register_noncompact_helper) ( Addr a ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Virtual register allocation */ |
| |
| /* Get a new virtual register */ |
| extern Int VG_(getNewTemp) ( UCodeBlock* cb ); |
| |
| /* Get a new virtual shadow register */ |
| extern Int VG_(getNewShadow) ( UCodeBlock* cb ); |
| |
| /* Get a virtual register's corresponding virtual shadow register */ |
| #define SHADOW(tempreg) ((tempreg)+1) |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Low-level UInstr builders */ |
| extern void VG_(newNOP) ( UInstr* u ); |
| extern void VG_(newUInstr0) ( UCodeBlock* cb, Opcode opcode, Int sz ); |
| extern void VG_(newUInstr1) ( UCodeBlock* cb, Opcode opcode, Int sz, |
| Tag tag1, UInt val1 ); |
| extern void VG_(newUInstr2) ( UCodeBlock* cb, Opcode opcode, Int sz, |
| Tag tag1, UInt val1, |
| Tag tag2, UInt val2 ); |
| extern void VG_(newUInstr3) ( UCodeBlock* cb, Opcode opcode, Int sz, |
| Tag tag1, UInt val1, |
| Tag tag2, UInt val2, |
| Tag tag3, UInt val3 ); |
| extern void VG_(setFlagRW) ( UInstr* u, |
| FlagSet fr, FlagSet fw ); |
| extern void VG_(setLiteralField) ( UCodeBlock* cb, UInt lit32 ); |
| extern void VG_(setCCallFields) ( UCodeBlock* cb, Addr fn, UChar argc, |
| UChar regparms_n, Bool has_ret_val ); |
| |
| extern void VG_(copyUInstr) ( UCodeBlock* cb, UInstr* instr ); |
| |
| extern Bool VG_(anyFlagUse) ( UInstr* u ); |
| |
| /* Refer to `the last instruction stuffed in' (can be lvalue). */ |
| #define LAST_UINSTR(cb) (cb)->instrs[(cb)->used-1] |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Higher-level UInstr sequence builders */ |
| extern void VG_(callHelper_0_0) ( UCodeBlock* cb, Addr f); |
| extern void VG_(callHelper_1_0) ( UCodeBlock* cb, Addr f, UInt arg1, |
| UInt regparms_n); |
| extern void VG_(callHelper_2_0) ( UCodeBlock* cb, Addr f, UInt arg1, UInt arg2, |
| UInt regparms_n); |
| |
| /* One way around the 3-arg C function limit is to pass args via global |
| * variables... ugly, but it works. */ |
| void VG_(set_global_var) ( UCodeBlock* cb, Addr globvar_ptr, UInt val); |
| |
| /* ------------------------------------------------------------------ */ |
| /* UCode pretty/ugly printing, to help debugging skins; but only useful |
| if VG_(needs).extended_UCode == True. */ |
| |
| /* When True, all generated code is/should be printed. */ |
| extern Bool VG_(print_codegen); |
| |
| extern void VG_(ppUCodeBlock) ( UCodeBlock* cb, Char* title ); |
| extern void VG_(ppUInstr) ( Int instrNo, UInstr* u ); |
| extern void VG_(ppUInstrWithRegs) ( Int instrNo, UInstr* u ); |
| extern void VG_(upUInstr) ( Int instrNo, UInstr* u ); |
| extern Char* VG_(nameUOpcode) ( Bool upper, Opcode opc ); |
| extern void VG_(ppUOperand) ( UInstr* u, Int operandNo, |
| Int sz, Bool parens ); |
| |
| /* ------------------------------------------------------------------ */ |
| /* Allocating/freeing basic blocks of UCode */ |
| extern UCodeBlock* VG_(allocCodeBlock) ( void ); |
| extern void VG_(freeCodeBlock) ( UCodeBlock* cb ); |
| |
| /*====================================================================*/ |
| /*=== Functions for generating x86 code from UCode ===*/ |
| /*====================================================================*/ |
| |
| /* These are only of interest for skins where |
| VG_(needs).extends_UCode == True. */ |
| |
| /* This is the Intel register encoding. */ |
| #define R_EAX 0 |
| #define R_ECX 1 |
| #define R_EDX 2 |
| #define R_EBX 3 |
| #define R_ESP 4 |
| #define R_EBP 5 |
| #define R_ESI 6 |
| #define R_EDI 7 |
| |
| #define R_AL (0+R_EAX) |
| #define R_CL (0+R_ECX) |
| #define R_DL (0+R_EDX) |
| #define R_BL (0+R_EBX) |
| #define R_AH (4+R_EAX) |
| #define R_CH (4+R_ECX) |
| #define R_DH (4+R_EDX) |
| #define R_BH (4+R_EBX) |
| |
| /* For pretty printing x86 code */ |
| extern Char* VG_(nameOfIntReg) ( Int size, Int reg ); |
| extern Char VG_(nameOfIntSize) ( Int size ); |
| |
| /* Randomly useful things */ |
| extern UInt VG_(extend_s_8to32) ( UInt x ); |
| |
| /* Code emitters */ |
| extern void VG_(emitB) ( UInt b ); |
| extern void VG_(emitW) ( UInt w ); |
| extern void VG_(emitL) ( UInt l ); |
| extern void VG_(newEmit)( void ); |
| |
| /* Finding offsets */ |
| extern Int VG_(helper_offset) ( Addr a ); |
| extern Int VG_(shadowRegOffset) ( Int arch ); |
| extern Int VG_(shadowFlagsOffset) ( void ); |
| |
| /* Converting reg ranks <-> Intel register ordering, for using register |
| liveness info */ |
| extern Int VG_(realRegNumToRank) ( Int realReg ); |
| extern Int VG_(rankToRealRegNum) ( Int rank ); |
| |
| /* Subroutine calls */ |
| /* This one just calls it. */ |
| void VG_(synth_call) ( Bool ensure_shortform, Int word_offset ); |
| |
| /* This one is good for calling C functions -- saves caller save regs, |
| pushes args, calls, clears the stack, restores caller save regs. |
| `fn' must be registered in the baseBlock first. Acceptable tags are |
| RealReg and Literal. |
| |
| WARNING: a UInstr should *not* be translated with synth_ccall followed |
| by some other x86 assembly code; this will confuse |
| vg_ccall_reg_save_analysis() and everything will fall over. |
| */ |
| void VG_(synth_ccall) ( Addr fn, Int argc, Int regparms_n, UInt argv[], |
| Tag tagv[], Int ret_reg, |
| RRegSet regs_live_before, RRegSet regs_live_after ); |
| |
| /* Addressing modes */ |
| void VG_(emit_amode_offregmem_reg) ( Int off, Int regmem, Int reg ); |
| void VG_(emit_amode_ereg_greg) ( Int e_reg, Int g_reg ); |
| |
| /* v-size (4, or 2 with OSO) insn emitters */ |
| void VG_(emit_movv_offregmem_reg) ( Int sz, Int off, Int areg, Int reg ); |
| void VG_(emit_movv_reg_offregmem) ( Int sz, Int reg, Int off, Int areg ); |
| void VG_(emit_movv_reg_reg) ( Int sz, Int reg1, Int reg2 ); |
| void VG_(emit_nonshiftopv_lit_reg)( Int sz, Opcode opc, UInt lit, Int reg ); |
| void VG_(emit_shiftopv_lit_reg) ( Int sz, Opcode opc, UInt lit, Int reg ); |
| void VG_(emit_nonshiftopv_reg_reg)( Int sz, Opcode opc, Int reg1, Int reg2 ); |
| void VG_(emit_movv_lit_reg) ( Int sz, UInt lit, Int reg ); |
| void VG_(emit_unaryopv_reg) ( Int sz, Opcode opc, Int reg ); |
| void VG_(emit_pushv_reg) ( Int sz, Int reg ); |
| void VG_(emit_popv_reg) ( Int sz, Int reg ); |
| |
| void VG_(emit_pushl_lit32) ( UInt int32 ); |
| void VG_(emit_pushl_lit8) ( Int lit8 ); |
| void VG_(emit_cmpl_zero_reg) ( Int reg ); |
| void VG_(emit_swapl_reg_EAX) ( Int reg ); |
| void VG_(emit_movv_lit_offregmem) ( Int sz, UInt lit, Int off, Int memreg ); |
| |
| /* b-size (1 byte) instruction emitters */ |
| void VG_(emit_movb_lit_offregmem) ( UInt lit, Int off, Int memreg ); |
| void VG_(emit_movb_reg_offregmem) ( Int reg, Int off, Int areg ); |
| void VG_(emit_unaryopb_reg) ( Opcode opc, Int reg ); |
| void VG_(emit_testb_lit_reg) ( UInt lit, Int reg ); |
| |
| /* zero-extended load emitters */ |
| void VG_(emit_movzbl_offregmem_reg) ( Int off, Int regmem, Int reg ); |
| void VG_(emit_movzwl_offregmem_reg) ( Int off, Int areg, Int reg ); |
| |
| /* misc instruction emitters */ |
| void VG_(emit_call_reg) ( Int reg ); |
| void VG_(emit_add_lit_to_esp) ( Int lit ); |
| void VG_(emit_jcondshort_delta) ( Condcode cond, Int delta ); |
| void VG_(emit_pushal) ( void ); |
| void VG_(emit_popal) ( void ); |
| void VG_(emit_AMD_prefetch_reg) ( Int reg ); |
| |
| |
| /*====================================================================*/ |
| /*=== Execution contexts ===*/ |
| /*====================================================================*/ |
| |
| /* Generic resolution type used in a few different ways, such as deciding |
| how closely to compare two errors for equality. */ |
| typedef |
| enum { Vg_LowRes, Vg_MedRes, Vg_HighRes } |
| VgRes; |
| |
| typedef |
| struct _ExeContext |
| ExeContext; |
| |
| /* Compare two ExeContexts, just comparing the top two callers. */ |
| extern Bool VG_(eq_ExeContext) ( VgRes res, |
| ExeContext* e1, ExeContext* e2 ); |
| |
| /* Print an ExeContext. */ |
| extern void VG_(pp_ExeContext) ( ExeContext* ); |
| |
| /* Take a snapshot of the client's stack. Search our collection of |
| ExeContexts to see if we already have it, and if not, allocate a |
| new one. Either way, return a pointer to the context. */ |
| extern ExeContext* VG_(get_ExeContext) ( ThreadState *tst ); |
| |
| |
| /*====================================================================*/ |
| /*=== Error reporting ===*/ |
| /*====================================================================*/ |
| |
| /* ------------------------------------------------------------------ */ |
| /* Suppressions describe errors which we want to suppress, ie, not |
| show the user, usually because it is caused by a problem in a library |
| which we can't fix, replace or work around. Suppressions are read from |
| a file at startup time, specified by vg_clo_suppressions, and placed in |
| the vg_suppressions list. This gives flexibility so that new |
| suppressions can be added to the file as and when needed. |
| */ |
| |
| typedef |
| Int /* Do not make this unsigned! */ |
| SuppKind; |
| |
| /* An extensible (via the 'extra' field) suppression record. This holds |
| the suppression details of interest to a skin. Skins can use a normal |
| enum (with element values in the normal range (0..)) for `skind'. |
| |
| If VG_(needs).report_errors==True, for each suppression read in by core |
| SKN_(recognised_suppression)() and SKN_(read_extra_suppression_info) will |
| be called. The `skind' field is filled in by the value returned in the |
| argument of the first function; the second function can fill in the |
| `string' and `extra' fields if it wants. |
| */ |
| typedef |
| struct { |
| /* What kind of suppression. Must use the range (0..) */ |
| SuppKind skind; |
| /* String -- use is optional. NULL by default. */ |
| Char* string; |
| /* Anything else -- use is optional. NULL by default. */ |
| void* extra; |
| } |
| SkinSupp; |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Error records contain enough info to generate an error report. The idea |
| is that (typically) the same few points in the program generate thousands |
| of illegal accesses, and we don't want to spew out a fresh error message |
| for each one. Instead, we use these structures to common up duplicates. |
| */ |
| |
| typedef |
| Int /* Do not make this unsigned! */ |
| ErrorKind; |
| |
| /* An extensible (via the 'extra' field) error record. This holds |
| the error details of interest to a skin. Skins can use a normal |
| enum (with element values in the normal range (0..)) for `ekind'. |
| |
| When errors are found and recorded with VG_(maybe_record_error)(), all |
| the skin must do is pass in the four parameters; core will |
| allocate/initialise the error record. |
| */ |
| typedef |
| struct { |
| /* Used by ALL. Must be in the range (0..) */ |
| Int ekind; |
| /* Used frequently */ |
| Addr addr; |
| /* Used frequently */ |
| Char* string; |
| /* For any skin-specific extras: size and the extra fields */ |
| void* extra; |
| } |
| SkinError; |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Call this when an error occurs. It will be recorded if it's not been |
| seen before. If it has, the existing error record will have its count |
| incremented. |
| |
| If the error occurs in generated code, 'tst' should be NULL. If the |
| error occurs in non-generated code, 'tst' should be non-NULL. The |
| `extra' field can be stack-allocated; it will be copied (using |
| SKN_(dup_extra_and_update)()) if needed. But it won't be copied |
| if it's NULL. |
| */ |
| extern void VG_(maybe_record_error) ( ThreadState* tst, ErrorKind ekind, |
| Addr a, Char* s, void* extra ); |
| |
| /* Gets a non-blank, non-comment line of at most nBuf chars from fd. |
| Skips leading spaces on the line. Returns True if EOF was hit instead. |
| Useful for reading in extra skin-specific suppression lines. |
| */ |
| extern Bool VG_(getLine) ( Int fd, Char* buf, Int nBuf ); |
| |
| |
| /*====================================================================*/ |
| /*=== Obtaining debug information ===*/ |
| /*====================================================================*/ |
| |
| /* Get the file/function/line number of the instruction at address 'a'. |
| For these four, if debug info for the address is found, it copies the |
| info into the buffer/UInt and returns True. If not, it returns False and |
| nothing is copied. VG_(get_fnname) always demangles C++ function names. |
| */ |
| extern Bool VG_(get_filename) ( Addr a, Char* filename, Int n_filename ); |
| extern Bool VG_(get_fnname) ( Addr a, Char* fnname, Int n_fnname ); |
| extern Bool VG_(get_linenum) ( Addr a, UInt* linenum ); |
| |
| /* This one is more efficient if getting both filename and line number, |
| because the two lookups are done together. */ |
| extern Bool VG_(get_filename_linenum) |
| ( Addr a, Char* filename, Int n_filename, |
| UInt* linenum ); |
| |
| /* Succeeds only if we find from debug info that 'a' is the address of the |
| first instruction in a function -- as opposed to VG_(get_fnname) which |
| succeeds if we find from debug info that 'a' is the address of any |
| instruction in a function. Use this to instrument the start of |
| a particular function. Nb: if a executable/shared object is stripped |
| of its symbols, this function will not be able to recognise function |
| entry points within it. */ |
| extern Bool VG_(get_fnname_if_entry) ( Addr a, Char* filename, Int n_filename ); |
| |
| /* Succeeds if the address is within a shared object or the main executable. |
| It doesn't matter if debug info is present or not. */ |
| extern Bool VG_(get_objname) ( Addr a, Char* objname, Int n_objname ); |
| |
| |
| /*====================================================================*/ |
| /*=== Shadow chunks and block-finding ===*/ |
| /*====================================================================*/ |
| |
| typedef |
| enum { |
| Vg_AllocMalloc = 0, |
| Vg_AllocNew = 1, |
| Vg_AllocNewVec = 2 |
| } |
| VgAllocKind; |
| |
| /* Description of a malloc'd chunk. skin_extra[] part can be used by |
| the skin; size of array is given by VG_(needs).sizeof_shadow_chunk. */ |
| typedef |
| struct _ShadowChunk { |
| struct _ShadowChunk* next; |
| UInt size : 30; /* size requested */ |
| VgAllocKind allockind : 2; /* which wrapper did the allocation */ |
| Addr data; /* ptr to actual block */ |
| UInt skin_extra[0]; /* extra skin-specific info */ |
| } |
| ShadowChunk; |
| |
| /* Use this to free blocks if VG_(needs).alternative_free == True. |
| It frees the ShadowChunk and the malloc'd block it points to. */ |
| extern void VG_(freeShadowChunk) ( ShadowChunk* sc ); |
| |
| /* Makes an array of pointers to all the shadow chunks of malloc'd blocks */ |
| extern ShadowChunk** VG_(get_malloc_shadows) ( /*OUT*/ UInt* n_shadows ); |
| |
| /* Determines if address 'a' is within the bounds of the block at start. |
| Allows a little 'slop' round the edges. */ |
| extern Bool VG_(addr_is_in_block) ( Addr a, Addr start, UInt size ); |
| |
| /* Searches through currently malloc'd blocks until a matching one is found. |
| Returns NULL if none match. Extra arguments can be implicitly passed to |
| p using nested functions; see vg_memcheck_errcontext.c for an example. */ |
| extern ShadowChunk* VG_(any_matching_mallocd_ShadowChunks) |
| ( Bool (*p) ( ShadowChunk* )); |
| |
| /* Searches through all thread's stacks to see if any match. Returns |
| * VG_INVALID_THREADID if none match. */ |
| extern ThreadId VG_(any_matching_thread_stack) |
| ( Bool (*p) ( Addr stack_min, Addr stack_max )); |
| |
| /*====================================================================*/ |
| /*=== Skin-specific stuff ===*/ |
| /*====================================================================*/ |
| |
| /* Skin-specific settings. |
| * |
| * If new fields are added to this type, update: |
| * - vg_main.c:VG_(needs) initialisation |
| * - vg_main.c:sanity_check_needs() |
| * |
| * If the name of this type or any of its fields change, update: |
| * - dependent comments (just search for "VG_(needs)"). |
| */ |
| typedef |
| struct { |
| /* name and description used in the startup message */ |
| Char* name; |
| Char* description; |
| |
| /* Booleans that decide core behaviour */ |
| |
| /* Want to have errors detected by Valgrind's core reported? Includes: |
| - pthread API errors (many; eg. unlocking a non-locked mutex) |
| - silly arguments to malloc() et al (eg. negative size) |
| - invalid file descriptors to blocking syscalls read() and write() |
| - bad signal numbers passed to sigaction() |
| - attempt to install signal handler for SIGKILL or SIGSTOP */ |
| Bool core_errors; |
| /* Want to report errors from the skin? This implies use of |
| suppressions, too. */ |
| Bool skin_errors; |
| |
| /* Should __libc_freeres() be run? Bugs in it crash the skin. */ |
| Bool run_libc_freeres; |
| |
| /* Booleans that indicate extra operations are defined; if these are |
| True, the corresponding template functions (given below) must be |
| defined. A lot like being a member of a type class. */ |
| |
| /* Is information kept about specific individual basic blocks? (Eg. for |
| cachesim there are cost-centres for every instruction, stored at a |
| basic block level.) If so, it sometimes has to be discarded, because |
| .so mmap/munmap-ping or self-modifying code (informed by the |
| DISCARD_TRANSLATIONS user request) can cause one instruction address |
| to store information about more than one instruction in one program |
| run! */ |
| Bool basic_block_discards; |
| |
| /* Maintains information about each register? */ |
| Bool shadow_regs; |
| |
| /* Skin defines its own command line options? */ |
| Bool command_line_options; |
| /* Skin defines its own client requests? */ |
| Bool client_requests; |
| |
| /* Skin defines its own UInstrs? */ |
| Bool extended_UCode; |
| |
| /* Skin does stuff before and/or after system calls? */ |
| Bool syscall_wrapper; |
| |
| /* Size, in words, of extra info about malloc'd blocks recorded by |
| skin. Be careful to get this right or you'll get seg faults! */ |
| UInt sizeof_shadow_block; |
| |
| /* Skin does free()s itself? */ |
| Bool alternative_free; |
| |
| /* Are skin-state sanity checks performed? */ |
| Bool sanity_checks; |
| } |
| VgNeeds; |
| |
| extern VgNeeds VG_(needs); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Core events to track */ |
| |
| /* Part of the core from which this call was made. Useful for determining |
| * what kind of error message should be emitted. */ |
| typedef |
| enum { Vg_CorePThread, Vg_CoreSignal, Vg_CoreSysCall, Vg_CoreTranslate } |
| CorePart; |
| |
| /* Events happening in core to track. To be notified, assign a function |
| * to the function pointer. To ignore an event, don't do anything |
| * (default assignment is to NULL in which case the call is skipped). */ |
| typedef |
| struct { |
| /* Memory events */ |
| void (*new_mem_startup)( Addr a, UInt len, Bool rr, Bool ww, Bool xx ); |
| void (*new_mem_heap) ( Addr a, UInt len, Bool is_inited ); |
| void (*new_mem_stack) ( Addr a, UInt len ); |
| void (*new_mem_stack_aligned) ( Addr a, UInt len ); |
| void (*new_mem_stack_signal) ( Addr a, UInt len ); |
| void (*new_mem_brk) ( Addr a, UInt len ); |
| void (*new_mem_mmap) ( Addr a, UInt len, |
| Bool nn, Bool rr, Bool ww, Bool xx ); |
| |
| void (*copy_mem_heap) ( Addr from, Addr to, UInt len ); |
| void (*copy_mem_remap) ( Addr from, Addr to, UInt len ); |
| void (*change_mem_mprotect) ( Addr a, UInt len, |
| Bool nn, Bool rr, Bool ww, Bool xx ); |
| |
| void (*ban_mem_heap) ( Addr a, UInt len ); |
| void (*ban_mem_stack) ( Addr a, UInt len ); |
| |
| void (*die_mem_heap) ( Addr a, UInt len ); |
| void (*die_mem_stack) ( Addr a, UInt len ); |
| void (*die_mem_stack_aligned) ( Addr a, UInt len ); |
| void (*die_mem_stack_signal) ( Addr a, UInt len ); |
| void (*die_mem_brk) ( Addr a, UInt len ); |
| void (*die_mem_munmap) ( Addr a, UInt len ); |
| |
| void (*bad_free) ( ThreadState* tst, Addr a ); |
| void (*mismatched_free) ( ThreadState* tst, Addr a ); |
| |
| void (*pre_mem_read) ( CorePart part, ThreadState* tst, |
| Char* s, Addr a, UInt size ); |
| void (*pre_mem_read_asciiz) ( CorePart part, ThreadState* tst, |
| Char* s, Addr a ); |
| void (*pre_mem_write) ( CorePart part, ThreadState* tst, |
| Char* s, Addr a, UInt size ); |
| /* Not implemented yet -- have to add in lots of places, which is a |
| pain. Won't bother unless/until there's a need. */ |
| /* void (*post_mem_read) ( ThreadState* tst, Char* s, |
| Addr a, UInt size ); */ |
| void (*post_mem_write) ( Addr a, UInt size ); |
| |
| |
| /* Scheduler events */ |
| void (*thread_run) ( ThreadId tid ); |
| |
| |
| /* Mutex events */ |
| void (*post_mutex_lock) ( ThreadId tid, |
| void* /*pthread_mutex_t* */ mutex ); |
| void (*post_mutex_unlock) ( ThreadId tid, |
| void* /*pthread_mutex_t* */ mutex ); |
| |
| /* Others... threads, condition variables, etc... */ |
| |
| /* ... */ |
| } |
| VgTrackEvents; |
| |
| /* Declare the struct instance */ |
| extern VgTrackEvents VG_(track_events); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Template functions */ |
| |
| /* These are the parameterised functions in the core. The default definitions |
| * are replaced by LD_PRELOADing skin substitutes. At the very least, a skin |
| * must define the fundamental template functions. Depending on what needs |
| * boolean variables are set, extra templates will be used too. For each |
| * group, the need governing its use is mentioned. */ |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* Fundamental template functions */ |
| |
| /* Initialise skin. Must do the following: |
| - initialise the 'needs' struct |
| - register any helpers called by generated code |
| |
| May do the following: |
| - indicate events to track by initialising part or all of the 'track' |
| struct |
| - register any skin-specific profiling events |
| - any other skin-specific initialisation |
| */ |
| extern void SK_(pre_clo_init) ( VgNeeds* needs, VgTrackEvents* track ); |
| |
| /* Do any initialisation that relies on the results of command line option |
| processing. */ |
| extern void SK_(post_clo_init)( void ); |
| |
| /* Instrument a basic block. Must be a true function, ie. the same input |
| always results in the same output, because basic blocks can be |
| retranslated. Unless you're doing something really strange... |
| 'orig_addr' is the address of the first instruction in the block. */ |
| extern UCodeBlock* SK_(instrument) ( UCodeBlock* cb, Addr orig_addr ); |
| |
| /* Finish up, print out any results, etc. */ |
| extern void SK_(fini) ( void ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* VG_(needs).report_errors */ |
| |
| /* Identify if two errors are equal, or equal enough. `res' indicates how |
| close is "close enough". `res' should be passed on as necessary, eg. if |
| the SkinError's extra field contains an ExeContext, `res' should be |
| passed to VG_(eq_ExeContext)() if the ExeContexts are considered. Other |
| than that, probably don't worry about it unless you have lots of very |
| similar errors occurring. |
| */ |
| extern Bool SK_(eq_SkinError) ( VgRes res, |
| SkinError* e1, SkinError* e2 ); |
| |
| /* Print error context. The passed function pp_ExeContext() can be (and |
| probably should be) used to print the location of the error. */ |
| extern void SK_(pp_SkinError) ( SkinError* ec, void (*pp_ExeContext)(void) ); |
| |
| /* Copy the ec->extra part and replace ec->extra with the new copy. This is |
| necessary to move from a temporary stack copy to a permanent heap one. |
| |
| Then fill in any details that could be postponed until after the decision |
| whether to ignore the error (ie. details not affecting the result of |
| SK_(eq_SkinError)()). This saves time when errors are ignored. |
| |
| Yuk. |
| */ |
| extern void SK_(dup_extra_and_update)(SkinError* ec); |
| |
| /* Return value indicates recognition. If recognised, type goes in `skind'. */ |
| extern Bool SK_(recognised_suppression) ( Char* name, SuppKind *skind ); |
| |
| /* Read any extra info for this suppression kind. For filling up the |
| `string' and `extra' fields in a `SkinSupp' struct if necessary. */ |
| extern Bool SK_(read_extra_suppression_info) ( Int fd, Char* buf, |
| Int nBuf, SkinSupp *s ); |
| |
| /* This should just check the kinds match and maybe some stuff in the |
| 'extra' field if appropriate */ |
| extern Bool SK_(error_matches_suppression)(SkinError* ec, SkinSupp* su); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* VG_(needs).basic_block_discards */ |
| |
| extern void SK_(discard_basic_block_info) ( Addr a, UInt size ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* VG_(needs).shadow_regs */ |
| |
| /* Valid values for general registers and EFLAGS register, for initialising |
| and updating registers when written in certain places in core. */ |
| extern void SK_(written_shadow_regs_values) ( UInt* gen_reg, UInt* eflags ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* VG_(needs).command_line_options */ |
| |
| /* Return True if option was recognised */ |
| extern Bool SK_(process_cmd_line_option)( Char* argv ); |
| |
| /* Print out command line usage for skin options */ |
| extern Char* SK_(usage) ( void ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* VG_(needs).client_requests */ |
| |
| extern UInt SK_(handle_client_request) ( ThreadState* tst, UInt* arg_block ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* VG_(needs).extends_UCode */ |
| |
| /* Used in VG_(getExtRegUsage)() */ |
| # define VG_UINSTR_READS_REG(ono) \ |
| { if (mycat(u->tag,ono) == tag) \ |
| { arr[n].num = mycat(u->val,ono); \ |
| arr[n].isWrite = False; \ |
| n++; \ |
| } \ |
| } |
| # define VG_UINSTR_WRITES_REG(ono) \ |
| { if (mycat(u->tag,ono) == tag) \ |
| { arr[n].num = mycat(u->val,ono); \ |
| arr[n].isWrite = True; \ |
| n++; \ |
| } \ |
| } |
| |
| // SSS: only ones using camel caps |
| extern Int SK_(getExtRegUsage) ( UInstr* u, Tag tag, RegUse* arr ); |
| extern void SK_(emitExtUInstr) ( UInstr* u, RRegSet regs_live_before ); |
| extern Bool SK_(saneExtUInstr) ( Bool beforeRA, Bool beforeLiveness, |
| UInstr* u ); |
| extern Char* SK_(nameExtUOpcode) ( Opcode opc ); |
| extern void SK_(ppExtUInstr) ( UInstr* u ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* VG_(needs).syscall_wrapper */ |
| |
| /* If either of the pre_ functions malloc() something to return, the |
| * corresponding post_ function had better free() it! |
| */ |
| extern void* SK_( pre_syscall) ( ThreadId tid, UInt syscallno, |
| Bool is_blocking ); |
| extern void SK_(post_syscall) ( ThreadId tid, UInt syscallno, |
| void* pre_result, Int res, |
| Bool is_blocking ); |
| |
| /* ------------------------------------------------------------------ */ |
| /* VG_(needs).sizeof_shadow_chunk > 0 */ |
| |
| extern void SK_(complete_shadow_chunk) ( ShadowChunk* sc, ThreadState* tst ); |
| |
| |
| /* ------------------------------------------------------------------ */ |
| /* VG_(needs).alternative_free */ |
| |
| extern void SK_(alt_free) ( ShadowChunk* sc, ThreadState* tst ); |
| |
| /* --------------------------------------------------------------------- |
| VG_(needs).sanity_checks */ |
| |
| extern Bool SK_(cheap_sanity_check) ( void ); |
| extern Bool SK_(expensive_sanity_check) ( void ); |
| |
| |
| #endif /* NDEF __VG_SKIN_H */ |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end vg_skin.h ---*/ |
| /*--------------------------------------------------------------------*/ |
| |