X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/594467781e41cea1d841b9fc501a8cc0cc0f7081..299c2d7814cebfdfdd05c1225b67ec2943900ba1:/src/mc/mc_private.h diff --git a/src/mc/mc_private.h b/src/mc/mc_private.h index ecf5bf12e6..20e4ab832f 100644 --- a/src/mc/mc_private.h +++ b/src/mc/mc_private.h @@ -1,4 +1,4 @@ -/* Copyright (c) 2007-2013. The SimGrid Team. +/* Copyright (c) 2007-2014. The SimGrid Team. * All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it @@ -36,8 +36,11 @@ typedef struct s_mc_function_index_item s_mc_function_index_item_t, *mc_function #define NB_REGIONS 3 /* binary data (data + BSS) (type = 2), libsimgrid data (data + BSS) (type = 1), std_heap (type = 0)*/ typedef struct s_mc_mem_region{ + // Real address: void *start_addr; + // Copy of the datra: void *data; + // Size of the data region: size_t size; } s_mc_mem_region_t, *mc_mem_region_t; @@ -92,6 +95,31 @@ mc_snapshot_t MC_take_snapshot(int num_state); void MC_restore_snapshot(mc_snapshot_t); void MC_free_snapshot(mc_snapshot_t); +/** \brief Translate a pointer from process address space to snapshot address space + * + * The address space contains snapshot of the main/application memory: + * this function finds the address in a given snaphot for a given + * real/application address. + * + * For read only memory regions and other regions which are not int the + * snapshot, the address is not changed. + * + * \param addr Application address + * \param snapshot The snapshot of interest (if NULL no translation is done) + * \return Translated address in the snapshot address space + * */ +void* mc_translate_address(uintptr_t addr, mc_snapshot_t snapshot); + +/** \brief Translate a pointer from the snapshot address space to the application address space + * + * This is the inverse of mc_translate_address. + * + * \param addr Address in the snapshot address space + * \param snapsot Snapshot of interest (if NULL no translation is done) + * \return Translated address in the application address space + */ +uintptr_t mc_untranslate_address(void* addr, mc_snapshot_t snapshot); + extern xbt_dynar_t mc_checkpoint_ignore; /********************************* MC Global **********************************/ @@ -341,10 +369,10 @@ struct s_mc_object_info { char *start_exec, *end_exec; // Executable segment char *start_rw, *end_rw; // Read-write segment char *start_ro, *end_ro; // read-only segment - xbt_dict_t local_variables; // xbt_dict_t + xbt_dict_t subprograms; // xbt_dict_t xbt_dynar_t global_variables; // xbt_dynar_t xbt_dict_t types; // xbt_dict_t - xbt_dict_t types_by_name; // xbt_dict_t (full defined type only) + xbt_dict_t full_types_by_name; // xbt_dict_t (full defined type only) // Here we sort the minimal information for an efficient (and cache-efficient) // lookup of a function given an instruction pointer. @@ -366,71 +394,61 @@ mc_object_info_t MC_ip_find_object_info(void* ip); extern mc_object_info_t mc_libsimgrid_info; extern mc_object_info_t mc_binary_info; +extern mc_object_info_t mc_object_infos[2]; +extern size_t mc_object_infos_size; void MC_find_object_address(memory_map_t maps, mc_object_info_t result); void MC_post_process_types(mc_object_info_t info); -typedef enum { - e_dw_loclist, - e_dw_register, - e_dw_bregister_op, - e_dw_lit, - e_dw_fbregister_op, - e_dw_piece, - e_dw_arithmetic, - e_dw_plus_uconst, - e_dw_compose, - e_dw_deref, - e_dw_uconstant, - e_dw_sconstant, - e_dw_unsupported -} e_dw_location_type; - -typedef struct s_dw_location{ - e_dw_location_type type; - union{ - - xbt_dynar_t loclist; - - int reg; - - struct{ - unsigned int reg; - int offset; - }breg_op; - - unsigned int lit; - - int fbreg_op; - - int piece; - - unsigned short int deref_size; - - xbt_dynar_t compose; - - char *arithmetic; - - struct{ - int bytes; - long unsigned int value; - }uconstant; - - struct{ - int bytes; - long signed int value; - }sconstant; - - unsigned int plus_uconst; - - }location; -}s_dw_location_t, *dw_location_t; - -typedef struct s_dw_location_entry{ - void* lowpc; - void* highpc; - dw_location_t location; -}s_dw_location_entry_t, *dw_location_entry_t; +// ***** Expressions + +/** \brief a DWARF expression with optional validity contraints */ +typedef struct s_mc_expression { + size_t size; + Dwarf_Op* ops; + // Optional validity: + void* lowpc, *highpc; +} s_mc_expression_t, *mc_expression_t; + +/** A location list (list of location expressions) */ +typedef struct s_mc_location_list { + size_t size; + mc_expression_t locations; +} s_mc_location_list_t, *mc_location_list_t; + +uintptr_t mc_dwarf_resolve_location(mc_expression_t expression, mc_object_info_t object_info, unw_cursor_t* c, void* frame_pointer_address, mc_snapshot_t snapshot); +uintptr_t mc_dwarf_resolve_locations(mc_location_list_t locations, mc_object_info_t object_info, unw_cursor_t* c, void* frame_pointer_address, mc_snapshot_t snapshot); + +void mc_dwarf_expression_clear(mc_expression_t expression); +void mc_dwarf_expression_init(mc_expression_t expression, size_t len, Dwarf_Op* ops); + +void mc_dwarf_location_list_clear(mc_location_list_t list); + +void mc_dwarf_location_list_init_from_expression(mc_location_list_t target, size_t len, Dwarf_Op* ops); +void mc_dwarf_location_list_init(mc_location_list_t target, mc_object_info_t info, Dwarf_Die* die, Dwarf_Attribute* attr); + +// ***** Variables and functions + +struct s_dw_type{ + e_dw_type_type type; + Dwarf_Off id; /* Offset in the section (in hexadecimal form) */ + char *name; /* Name of the type */ + int byte_size; /* Size in bytes */ + int element_count; /* Number of elements for array type */ + char *dw_type_id; /* DW_AT_type id */ + xbt_dynar_t members; /* if DW_TAG_structure_type, DW_TAG_class_type, DW_TAG_union_type*/ + int is_pointer_type; + + // Location (for members) is either of: + struct s_mc_expression location; + int offset; + + dw_type_t subtype; // DW_AT_type + dw_type_t full_type; // The same (but more complete) type +}; + +void* mc_member_resolve(const void* base, dw_type_t type, dw_type_t member, mc_snapshot_t snapshot); +void* mc_member_snapshot_resolve(const void* base, dw_type_t type, dw_type_t member, mc_snapshot_t snapshot); typedef struct s_dw_variable{ Dwarf_Off dwarf_offset; /* Global offset of the field. */ @@ -440,19 +458,25 @@ typedef struct s_dw_variable{ dw_type_t type; // Use either of: - dw_location_t location; + s_mc_location_list_t locations; void* address; + size_t start_scope; + mc_object_info_t object_info; + }s_dw_variable_t, *dw_variable_t; struct s_dw_frame{ + int tag; char *name; void *low_pc; void *high_pc; - dw_location_t frame_base; + s_mc_location_list_t frame_base; xbt_dynar_t /* */ variables; /* Cannot use dict, there may be several variables with the same name (in different lexical blocks)*/ - unsigned long int start; /* DWARF offset of the subprogram */ - unsigned long int end; /* Dwarf offset of the next sibling */ + unsigned long int id; /* DWARF offset of the subprogram */ + xbt_dynar_t /* */ scopes; + Dwarf_Off abstract_origin_id; + mc_object_info_t object_info; }; struct s_mc_function_index_item { @@ -460,6 +484,8 @@ struct s_mc_function_index_item { dw_frame_t function; }; +void mc_frame_free(dw_frame_t freme); + void dw_type_free(dw_type_t t); void dw_variable_free(dw_variable_t v); void dw_variable_free_voidp(void *t); @@ -468,17 +494,53 @@ void MC_dwarf_register_global_variable(mc_object_info_t info, dw_variable_t vari void MC_register_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable); void MC_dwarf_register_non_global_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable); void MC_dwarf_register_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable); + +/** Find the DWARF offset for this ELF object + * + * An offset is applied to address found in DWARF: + * + *
    + *
  • for an executable obejct, addresses are virtual address + * (there is no offset) i.e. \f$\text{virtual address} = \{dwarf address}\f$;
    • + *
  • for a shared object, the addreses are offset from the begining + * of the shared object (the base address of the mapped shared + * object must be used as offset + * i.e. \f$\text{virtual address} = \text{shared object base address} + * + \text{dwarf address}\f$.
    • + * + */ void* MC_object_base_address(mc_object_info_t info); /********************************** DWARF **********************************/ -Dwarf_Off MC_dwarf_resolve_location(unw_cursor_t* c, dw_location_t location, void* frame_pointer_address); -void* mc_find_frame_base(void* ip, dw_frame_t frame, unw_cursor_t* unw_cursor); +#define MC_EXPRESSION_STACK_SIZE 64 + +#define MC_EXPRESSION_OK 0 +#define MC_EXPRESSION_E_UNSUPPORTED_OPERATION 1 +#define MC_EXPRESSION_E_STACK_OVERFLOW 2 +#define MC_EXPRESSION_E_STACK_UNDERFLOW 3 +#define MC_EXPRESSION_E_MISSING_STACK_CONTEXT 4 +#define MC_EXPRESSION_E_MISSING_FRAME_BASE 5 +#define MC_EXPRESSION_E_NO_BASE_ADDRESS 6 + +typedef struct s_mc_expression_state { + uintptr_t stack[MC_EXPRESSION_STACK_SIZE]; + size_t stack_size; + + unw_cursor_t* cursor; + void* frame_base; + mc_snapshot_t snapshot; + mc_object_info_t object_info; +} s_mc_expression_state_t, *mc_expression_state_t; + +int mc_dwarf_execute_expression(size_t n, const Dwarf_Op* ops, mc_expression_state_t state); + +void* mc_find_frame_base(dw_frame_t frame, mc_object_info_t object_info, unw_cursor_t* unw_cursor); /********************************** Miscellaneous **********************************/ typedef struct s_local_variable{ - char *frame; + dw_frame_t subprogram; unsigned long ip; char *name; dw_type_t type; @@ -495,6 +557,8 @@ typedef struct s_mc_comm_pattern{ int completed; unsigned long src_proc; unsigned long dst_proc; + const char *src_host; + const char *dst_host; char *rdv; size_t data_size; void *data; @@ -510,7 +574,7 @@ void get_comm_pattern(xbt_dynar_t communications_pattern, smx_simcall_t request, typedef struct s_mc_address_set *mc_address_set_t; mc_address_set_t mc_address_set_new(); -mc_address_set_t mc_address_set_free(mc_address_set_t* p); +void mc_address_set_free(mc_address_set_t* p); void mc_address_add(mc_address_set_t p, const void* value); bool mc_address_test(mc_address_set_t p, const void* value);