| |
| /*--------------------------------------------------------------------*/ |
| /*--- The core/tool interface. pub_tool_tooliface.h ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, a dynamic binary instrumentation |
| framework. |
| |
| Copyright (C) 2000-2005 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 __PUB_TOOL_TOOLIFACE_H |
| #define __PUB_TOOL_TOOLIFACE_H |
| |
| #include "pub_tool_errormgr.h" // for Error, Supp |
| #include "libvex.h" // for VexGuestLayout |
| |
| /* ------------------------------------------------------------------ */ |
| /* The interface version */ |
| |
| /* The version number indicates binary-incompatible changes to the |
| interface; if the core and tool versions don't match, Valgrind |
| will abort. */ |
| #define VG_CORE_INTERFACE_VERSION 9 |
| |
| typedef struct _ToolInfo { |
| Int sizeof_ToolInfo; |
| Int interface_version; |
| |
| /* Initialise tool. Must do the following: |
| - initialise the `details' struct, via the VG_(details_*)() functions |
| - register any helpers called by generated code |
| |
| May do the following: |
| - initialise the `needs' struct to indicate certain requirements, via |
| the VG_(needs_*)() functions |
| - initialize all the tool's entrypoints via the VG_(init_*)() functions |
| - register any tool-specific profiling events |
| - any other tool-specific initialisation |
| */ |
| void (*tl_pre_clo_init) ( void ); |
| } ToolInfo; |
| |
| extern const ToolInfo VG_(tool_info); |
| |
| /* Every tool must include this macro somewhere, exactly once. */ |
| #define VG_DETERMINE_INTERFACE_VERSION(pre_clo_init) \ |
| const ToolInfo VG_(tool_info) = { \ |
| .sizeof_ToolInfo = sizeof(ToolInfo), \ |
| .interface_version = VG_CORE_INTERFACE_VERSION, \ |
| .tl_pre_clo_init = pre_clo_init, \ |
| }; |
| |
| /* ------------------------------------------------------------------ */ |
| /* Basic tool functions */ |
| |
| /* The tool_instrument function is passed as a callback to |
| LibVEX_Translate. VgInstrumentClosure carries additional info |
| which the instrumenter might like to know, but which is opaque to |
| Vex. |
| */ |
| typedef |
| struct { |
| Addr64 nraddr; /* non-redirected guest address */ |
| Addr64 readdr; /* redirected guest address */ |
| ThreadId tid; /* tid requesting translation */ |
| } |
| VgCallbackClosure; |
| |
| extern void VG_(basic_tool_funcs)( |
| // Do any initialisation that can only be done after command line |
| // processing. |
| void (*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... Note that orig_addr_noredir is not necessarily the |
| // same as the address of the first instruction in the IR, due to |
| // function redirection. |
| IRBB*(*instrument)(VgCallbackClosure*, |
| IRBB* bb_in, |
| VexGuestLayout*, VexGuestExtents*, |
| IRType gWordTy, IRType hWordTy), |
| |
| // Finish up, print out any results, etc. `exitcode' is program's exit |
| // code. The shadow can be found with VG_(get_exit_status_shadow)(). |
| void (*fini)(Int) |
| ); |
| |
| /* ------------------------------------------------------------------ */ |
| /* Details */ |
| |
| /* Default value for avg_translations_sizeB (in bytes), indicating typical |
| code expansion of about 6:1. */ |
| #define VG_DEFAULT_TRANS_SIZEB 100 |
| |
| /* Information used in the startup message. `name' also determines the |
| string used for identifying suppressions in a suppression file as |
| belonging to this tool. `version' can be NULL, in which case (not |
| surprisingly) no version info is printed; this mechanism is designed for |
| tools distributed with Valgrind that share a version number with |
| Valgrind. Other tools not distributed as part of Valgrind should |
| probably have their own version number. */ |
| extern void VG_(details_name) ( Char* name ); |
| extern void VG_(details_version) ( Char* version ); |
| extern void VG_(details_description) ( Char* description ); |
| extern void VG_(details_copyright_author) ( Char* copyright_author ); |
| |
| /* Average size of a translation, in bytes, so that the translation |
| storage machinery can allocate memory appropriately. Not critical, |
| setting is optional. */ |
| extern void VG_(details_avg_translation_sizeB) ( UInt size ); |
| |
| /* String printed if an `tl_assert' assertion fails or VG_(tool_panic) |
| is called. Should probably be an email address. */ |
| extern void VG_(details_bug_reports_to) ( Char* bug_reports_to ); |
| |
| /* ------------------------------------------------------------------ */ |
| /* Needs */ |
| |
| /* Booleans that decide core behaviour, but don't require extra |
| operations to be defined if `True' */ |
| |
| /* Should __libc_freeres() be run? Bugs in it can crash the tool. */ |
| extern void VG_(needs_libc_freeres) ( void ); |
| |
| /* Want to have errors detected by Valgrind's core reported? Includes: |
| - pthread API errors (many; eg. unlocking a non-locked mutex) |
| [currently disabled] |
| - invalid file descriptors to syscalls like read() and write() |
| - bad signal numbers passed to sigaction() |
| - attempt to install signal handler for SIGKILL or SIGSTOP */ |
| extern void VG_(needs_core_errors) ( void ); |
| |
| /* 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. */ |
| |
| /* Want to report errors from tool? This implies use of suppressions, too. */ |
| extern void VG_(needs_tool_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 Error's `extra' part 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. |
| Bool (*eq_Error)(VgRes res, Error* e1, Error* e2), |
| |
| // Print error context. |
| void (*pp_Error)(Error* err), |
| |
| // Should fill in any details that could be postponed until after the |
| // decision whether to ignore the error (ie. details not affecting the |
| // result of VG_(tdict).tool_eq_Error()). This saves time when errors |
| // are ignored. |
| // Yuk. |
| // Return value: must be the size of the `extra' part in bytes -- used by |
| // the core to make a copy. |
| UInt (*update_extra)(Error* err), |
| |
| // Return value indicates recognition. If recognised, must set skind using |
| // VG_(set_supp_kind)(). |
| Bool (*recognised_suppression)(Char* name, Supp* su), |
| |
| // Read any extra info for this suppression kind. Most likely for filling |
| // in the `extra' and `string' parts (with VG_(set_supp_{extra, string})()) |
| // of a suppression if necessary. Should return False if a syntax error |
| // occurred, True otherwise. |
| Bool (*read_extra_suppression_info)(Int fd, Char* buf, Int nBuf, Supp* su), |
| |
| // This should just check the kinds match and maybe some stuff in the |
| // `string' and `extra' field if appropriate (using VG_(get_supp_*)() to |
| // get the relevant suppression parts). |
| Bool (*error_matches_suppression)(Error* err, Supp* su), |
| |
| // This should return the suppression name, for --gen-suppressions, or NULL |
| // if that error type cannot be suppressed. This is the inverse of |
| // VG_(tdict).tool_recognised_suppression(). |
| Char* (*get_error_name)(Error* err), |
| |
| // This should print any extra info for the error, for --gen-suppressions, |
| // including the newline. This is the inverse of |
| // VG_(tdict).tool_read_extra_suppression_info(). |
| void (*print_extra_suppression_info)(Error* err) |
| ); |
| |
| /* Is information kept by the tool about specific instructions or |
| translations? (Eg. for cachegrind there are cost-centres for every |
| instruction, stored in a per-translation fashion.) If so, the info |
| may have to be discarded when translations are unloaded (eg. due to |
| .so unloading, or otherwise at the discretion of m_transtab, eg |
| when the table becomes too full) to avoid stale information being |
| reused for new translations. */ |
| extern void VG_(needs_basic_block_discards) ( |
| // Discard any information that pertains to specific translations |
| // or instructions within the address range given. There are two |
| // possible approaches. |
| // - If info is being stored at a per-translation level, use orig_addr |
| // to identify which translation is being discarded. Each translation |
| // will be discarded exactly once. |
| // This orig_addr will match the orig_addr which was passed to |
| // to instrument() when this translation was made. Note that orig_addr |
| // won't necessarily be the same as the first address in "extents". |
| // - If info is being stored at a per-instruction level, you can get |
| // the address range(s) being discarded by stepping through "extents". |
| // Note that any single instruction may belong to more than one |
| // translation, and so could be covered by the "extents" of more than |
| // one call to this function. |
| // Doing it the first way (as eg. Cachegrind does) is probably easier. |
| void (*discard_basic_block_info)(Addr64 orig_addr, VexGuestExtents extents) |
| ); |
| |
| /* Tool defines its own command line options? */ |
| extern void VG_(needs_command_line_options) ( |
| // Return True if option was recognised. Presumably sets some state to |
| // record the option as well. |
| Bool (*process_cmd_line_option)(Char* argv), |
| |
| // Print out command line usage for options for normal tool operation. |
| void (*print_usage)(void), |
| |
| // Print out command line usage for options for debugging the tool. |
| void (*print_debug_usage)(void) |
| ); |
| |
| /* Tool defines its own client requests? */ |
| extern void VG_(needs_client_requests) ( |
| // If using client requests, the number of the first request should be equal |
| // to VG_USERREQ_TOOL_BASE('X', 'Y'), where 'X' and 'Y' form a suitable two |
| // character identification for the string. The second and subsequent |
| // requests should follow. |
| // |
| // This function should use the VG_IS_TOOL_USERREQ macro (in |
| // include/valgrind.h) to first check if it's a request for this tool. Then |
| // should handle it if it's recognised (and return True), or return False if |
| // not recognised. arg_block[0] holds the request number, any further args |
| // from the request are in arg_block[1..]. 'ret' is for the return value... |
| // it should probably be filled, if only with 0. |
| Bool (*handle_client_request)(ThreadId tid, UWord* arg_block, UWord* ret) |
| ); |
| |
| /* Tool does stuff before and/or after system calls? */ |
| // Nb: If either of the pre_ functions malloc() something to return, the |
| // corresponding post_ function had better free() it! |
| extern void VG_(needs_syscall_wrapper) ( |
| void (* pre_syscall)(ThreadId tid, UInt syscallno), |
| void (*post_syscall)(ThreadId tid, UInt syscallno, SysRes res) |
| ); |
| |
| /* Are tool-state sanity checks performed? */ |
| // Can be useful for ensuring a tool's correctness. cheap_sanity_check() |
| // is called very frequently; expensive_sanity_check() is called less |
| // frequently and can be more involved. |
| extern void VG_(needs_sanity_checks) ( |
| Bool(*cheap_sanity_check)(void), |
| Bool(*expensive_sanity_check)(void) |
| ); |
| |
| /* Do we need to see data symbols? */ |
| extern void VG_(needs_data_syms) ( void ); |
| |
| /* Does the tool need shadow memory allocated? */ |
| extern void VG_(needs_shadow_memory)( void ); |
| |
| /* Does the tool replace malloc() and friends with its own versions? |
| This has to be combined with the use of a vgpreload_<tool>.so module |
| or it won't work. See massif/Makefile.am for how to build it. */ |
| // The 'p' prefix avoids GCC complaints about overshadowing global names. |
| extern void VG_(needs_malloc_replacement)( |
| void* (*pmalloc) ( ThreadId tid, SizeT n ), |
| void* (*p__builtin_new) ( ThreadId tid, SizeT n ), |
| void* (*p__builtin_vec_new) ( ThreadId tid, SizeT n ), |
| void* (*pmemalign) ( ThreadId tid, SizeT align, SizeT n ), |
| void* (*pcalloc) ( ThreadId tid, SizeT nmemb, SizeT size1 ), |
| void (*pfree) ( ThreadId tid, void* p ), |
| void (*p__builtin_delete) ( ThreadId tid, void* p ), |
| void (*p__builtin_vec_delete) ( ThreadId tid, void* p ), |
| void* (*prealloc) ( ThreadId tid, void* p, SizeT new_size ), |
| SizeT client_malloc_redzone_szB |
| ); |
| |
| /* ------------------------------------------------------------------ */ |
| /* 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_CoreStartup, Vg_CorePThread, Vg_CoreSignal, Vg_CoreSysCall, |
| Vg_CoreTranslate, Vg_CoreClientReq } |
| CorePart; |
| |
| /* Events happening in core to track. To be notified, pass a callback |
| function to the appropriate function. To ignore an event, don't do |
| anything (the default is for events to be ignored). |
| |
| Note that most events aren't passed a ThreadId. If the event is one called |
| from generated code (eg. new_mem_stack_*), you can use |
| VG_(get_running_tid)() to find it. Otherwise, it has to be passed in, |
| as in pre_mem_read, and so the event signature will require changing. |
| |
| Memory events (Nb: to track heap allocation/freeing, a tool must replace |
| malloc() et al. See above how to do this.) |
| |
| These ones occur at startup, upon some signals, and upon some syscalls |
| */ |
| void VG_(track_new_mem_startup) (void(*f)(Addr a, SizeT len, |
| Bool rr, Bool ww, Bool xx)); |
| void VG_(track_new_mem_stack_signal)(void(*f)(Addr a, SizeT len)); |
| void VG_(track_new_mem_brk) (void(*f)(Addr a, SizeT len)); |
| void VG_(track_new_mem_mmap) (void(*f)(Addr a, SizeT len, |
| Bool rr, Bool ww, Bool xx)); |
| |
| void VG_(track_copy_mem_remap) (void(*f)(Addr from, Addr to, SizeT len)); |
| void VG_(track_change_mem_mprotect) (void(*f)(Addr a, SizeT len, |
| Bool rr, Bool ww, Bool xx)); |
| void VG_(track_die_mem_stack_signal)(void(*f)(Addr a, SizeT len)); |
| void VG_(track_die_mem_brk) (void(*f)(Addr a, SizeT len)); |
| void VG_(track_die_mem_munmap) (void(*f)(Addr a, SizeT len)); |
| |
| /* These ones are called when SP changes. A tool could track these itself |
| (except for ban_mem_stack) but it's much easier to use the core's help. |
| |
| The specialised ones are called in preference to the general one, if they |
| are defined. These functions are called a lot if they are used, so |
| specialising can optimise things significantly. If any of the |
| specialised cases are defined, the general case must be defined too. |
| |
| Nb: all the specialised ones must use the VG_REGPARM(n) attribute. |
| */ |
| void VG_(track_new_mem_stack_4) (VG_REGPARM(1) void(*f)(Addr new_ESP)); |
| void VG_(track_new_mem_stack_8) (VG_REGPARM(1) void(*f)(Addr new_ESP)); |
| void VG_(track_new_mem_stack_12)(VG_REGPARM(1) void(*f)(Addr new_ESP)); |
| void VG_(track_new_mem_stack_16)(VG_REGPARM(1) void(*f)(Addr new_ESP)); |
| void VG_(track_new_mem_stack_32)(VG_REGPARM(1) void(*f)(Addr new_ESP)); |
| void VG_(track_new_mem_stack) (void(*f)(Addr a, SizeT len)); |
| |
| void VG_(track_die_mem_stack_4) (VG_REGPARM(1) void(*f)(Addr die_ESP)); |
| void VG_(track_die_mem_stack_8) (VG_REGPARM(1) void(*f)(Addr die_ESP)); |
| void VG_(track_die_mem_stack_12)(VG_REGPARM(1) void(*f)(Addr die_ESP)); |
| void VG_(track_die_mem_stack_16)(VG_REGPARM(1) void(*f)(Addr die_ESP)); |
| void VG_(track_die_mem_stack_32)(VG_REGPARM(1) void(*f)(Addr die_ESP)); |
| void VG_(track_die_mem_stack) (void(*f)(Addr a, SizeT len)); |
| |
| /* Used for redzone at end of thread stacks */ |
| void VG_(track_ban_mem_stack) (void(*f)(Addr a, SizeT len)); |
| |
| /* These ones occur around syscalls, signal handling, etc */ |
| void VG_(track_pre_mem_read) (void(*f)(CorePart part, ThreadId tid, |
| Char* s, Addr a, SizeT size)); |
| void VG_(track_pre_mem_read_asciiz)(void(*f)(CorePart part, ThreadId tid, |
| Char* s, Addr a)); |
| void VG_(track_pre_mem_write) (void(*f)(CorePart part, ThreadId tid, |
| Char* s, Addr a, SizeT size)); |
| void VG_(track_post_mem_write) (void(*f)(CorePart part, ThreadId tid, |
| Addr a, SizeT size)); |
| |
| /* Register events. Use VG_(set_shadow_state_area)() to set the shadow regs |
| for these events. */ |
| void VG_(track_pre_reg_read) (void(*f)(CorePart part, ThreadId tid, |
| Char* s, OffT guest_state_offset, |
| SizeT size)); |
| void VG_(track_post_reg_write)(void(*f)(CorePart part, ThreadId tid, |
| OffT guest_state_offset, |
| SizeT size)); |
| |
| /* This one is called for malloc() et al if they are replaced by a tool. */ |
| void VG_(track_post_reg_write_clientcall_return)( |
| void(*f)(ThreadId tid, OffT guest_state_offset, SizeT size, Addr f)); |
| |
| |
| /* Scheduler events (not exhaustive) */ |
| void VG_(track_thread_run)(void(*f)(ThreadId tid)); |
| |
| |
| /* Thread events (not exhaustive) |
| |
| Called during thread create, before the new thread has run any |
| instructions (or touched any memory). |
| */ |
| void VG_(track_post_thread_create)(void(*f)(ThreadId tid, ThreadId child)); |
| void VG_(track_post_thread_join) (void(*f)(ThreadId joiner, ThreadId joinee)); |
| |
| /* Mutex events (not exhaustive) |
| "void *mutex" is really a pthread_mutex * |
| |
| Called before a thread can block while waiting for a mutex (called |
| regardless of whether the thread will block or not). */ |
| void VG_(track_pre_mutex_lock)(void(*f)(ThreadId tid, void* mutex)); |
| |
| /* Called once the thread actually holds the mutex (always paired with |
| pre_mutex_lock). */ |
| void VG_(track_post_mutex_lock)(void(*f)(ThreadId tid, void* mutex)); |
| |
| /* Called after a thread has released a mutex (no need for a corresponding |
| pre_mutex_unlock, because unlocking can't block). */ |
| void VG_(track_post_mutex_unlock)(void(*f)(ThreadId tid, void* mutex)); |
| |
| /* Signal events (not exhaustive) |
| |
| ... pre_send_signal, post_send_signal ... |
| |
| Called before a signal is delivered; `alt_stack' indicates if it is |
| delivered on an alternative stack. */ |
| void VG_(track_pre_deliver_signal) (void(*f)(ThreadId tid, Int sigNo, |
| Bool alt_stack)); |
| /* Called after a signal is delivered. Nb: unfortunately, if the signal |
| handler longjmps, this won't be called. */ |
| void VG_(track_post_deliver_signal)(void(*f)(ThreadId tid, Int sigNo)); |
| |
| /* Others... condition variables... |
| ... |
| */ |
| |
| #endif // __PUB_TOOL_TOOLIFACE_H |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |