X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/6959c1b7a880b31aaf3987098690daa76e2a1f5a..2b7bf2ece143fd83bafa635a83940f58083e7f18:/src/mc/mc_process.h diff --git a/src/mc/mc_process.h b/src/mc/mc_process.h index 64a62ac8d7..00251e4eb5 100644 --- a/src/mc/mc_process.h +++ b/src/mc/mc_process.h @@ -8,41 +8,123 @@ #define MC_PROCESS_H #include +#include -#include "simgrid_config.h" +#include +#include "simgrid_config.h" #include #include + +#ifdef HAVE_MC #include "xbt/mmalloc/mmprivate.h" +#endif +#include #include "simix/popping_private.h" +#include "simix/smx_private.h" #include "mc_forward.h" +#include "mc_base.h" #include "mc_mmalloc.h" // std_heap #include "mc_memory_map.h" -#include "mc_address_space.h" +#include "AddressSpace.hpp" +#include "mc_protocol.h" -SG_BEGIN_DECL() - -typedef enum { - MC_PROCESS_NO_FLAG = 0, - MC_PROCESS_SELF_FLAG = 1, -} e_mc_process_flags_t; +typedef int mc_process_flags_t; +#define MC_PROCESS_NO_FLAG 0 +#define MC_PROCESS_SELF_FLAG 1 // Those flags are used to track down which cached information // is still up to date and which information needs to be updated. -typedef enum { - MC_PROCESS_CACHE_FLAG_HEAP = 1, - MC_PROCESS_CACHE_FLAG_MALLOC_INFO = 2, -} e_mc_process_cache_flags_t ; +typedef int mc_process_cache_flags_t; +#define MC_PROCESS_CACHE_FLAG_NONE 0 +#define MC_PROCESS_CACHE_FLAG_HEAP 1 +#define MC_PROCESS_CACHE_FLAG_MALLOC_INFO 2 +#define MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES 4 + +typedef struct s_mc_smx_process_info s_mc_smx_process_info_t, *mc_smx_process_info_t; + +namespace simgrid { +namespace mc { + +struct IgnoredRegion { + std::uint64_t addr; + size_t size; +}; /** Representation of a process */ -struct s_mc_process { - s_mc_address_space_t address_space; - e_mc_process_flags_t process_flags; - pid_t pid; +class Process : public AddressSpace { +public: + Process(pid_t pid, int sockfd); + ~Process(); + + bool is_self() const + { + return this->process_flags & MC_PROCESS_SELF_FLAG; + } + + // Read memory: + const void* read_bytes(void* buffer, std::size_t size, + remote_ptr address, int process_index = ProcessIndexAny, + ReadMode mode = Normal) const MC_OVERRIDE; + void read_variable(const char* name, void* target, size_t size) const; + template + T read_variable(const char *name) const + { + static_assert(std::is_trivial::value, "Cannot read a non-trivial type"); + T res; + read_variable(name, &res, sizeof(T)); + return res; + } + char* read_string(remote_ptr address) const; + + // Write memory: + void write_bytes(const void* buffer, size_t len, remote_ptr address); + void clear_bytes(remote_ptr address, size_t len); + + // Debug information: + mc_object_info_t find_object_info(remote_ptr addr) const; + mc_object_info_t find_object_info_exec(remote_ptr addr) const; + mc_object_info_t find_object_info_rw(remote_ptr addr) const; + dw_frame_t find_function(remote_ptr ip) const; + dw_variable_t find_variable(const char* name) const; + + // Heap access: + xbt_mheap_t get_heap() + { + if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_HEAP)) + this->refresh_heap(); + return this->heap; + } + malloc_info* get_malloc_info() + { + if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_MALLOC_INFO)) + this->refresh_malloc_info(); + return this->heap_info; + } + + std::vector const& ignored_regions() const + { + return ignored_regions_; + } + void ignore_region(std::uint64_t address, std::size_t size); + + pid_t pid() const { return pid_; } + +private: + void init_memory_map_info(); + void refresh_heap(); + void refresh_malloc_info(); +private: + mc_process_flags_t process_flags; + pid_t pid_; +public: // to be private + int socket; + int status; + bool running; memory_map_t memory_map; void *maestro_stack_start, *maestro_stack_end; mc_object_info_t libsimgrid_info; @@ -51,20 +133,29 @@ struct s_mc_process { size_t object_infos_size; int memory_file; - // Cache: don't use those fields directly but with the getters - // which ensure that proper synchronisation has been done. - - e_mc_process_cache_flags_t cache_flags; + /** Copy of `simix_global->process_list` + * + * See mc_smx.c. + */ + xbt_dynar_t smx_process_infos; - /** Address of the heap structure in the target process. + /** Copy of `simix_global->process_to_destroy` + * + * See mc_smx.c. */ + xbt_dynar_t smx_old_process_infos; + + /** State of the cache (which variables are up to date) */ + mc_process_cache_flags_t cache_flags; + + /** Address of the heap structure in the MCed process. */ void* heap_address; /** Copy of the heap structure of the process * * This is refreshed with the `MC_process_refresh` call. * This is not used if the process is the current one: - * use `MC_process_get_heap_info` in order to use it. + * use `get_heap_info()` in order to use it. */ xbt_mheap_t heap; @@ -72,86 +163,45 @@ struct s_mc_process { * * This is refreshed with the `MC_process_refresh` call. * This is not used if the process is the current one: - * use `MC_process_get_malloc_info` in order to use it. + * use `get_malloc_info()` in order to use it. */ malloc_info* heap_info; -}; -void MC_process_init(mc_process_t process, pid_t pid); -void MC_process_clear(mc_process_t process); + // ***** Libunwind-data -/** Refresh the information about the process - * - * Do not use direclty, this is used by the getters when appropriate - * in order to have fresh data. - */ -void MC_process_refresh_heap(mc_process_t process); - -/** Refresh the information about the process - * - * Do not use direclty, this is used by the getters when appropriate - * in order to have fresh data. - * */ -void MC_process_refresh_malloc_info(mc_process_t process); - -static inline -bool MC_process_is_self(mc_process_t process) -{ - return process->process_flags & MC_PROCESS_SELF_FLAG; -} - -/* Process memory access: */ + /** Full-featured MC-aware libunwind address space for the process + * + * This address space is using a mc_unw_context_t + * (with mc_process_t/mc_address_space_t and unw_context_t). + */ + unw_addr_space_t unw_addr_space; -/** Read data from a process memory - * - * @param process the process - * @param local local memory address (destination) - * @param remote target process memory address (source) - * @param len data size - */ -const void* MC_process_read(mc_process_t process, - e_adress_space_read_flags_t flags, - void* local, const void* remote, size_t len, - int process_index); - -/** Write data to a process memory - * - * @param process the process - * @param local local memory address (source) - * @param remote target process memory address (target) - * @param len data size - */ -void MC_process_write(mc_process_t process, const void* local, void* remote, size_t len); + /** Underlying libunwind addres-space + * + * The `find_proc_info`, `put_unwind_info`, `get_dyn_info_list_addr` + * operations of the native MC address space is currently delegated + * to this address space (either the local or a ptrace unwinder). + */ + unw_addr_space_t unw_underlying_addr_space; -/* Functions, variables of the process: */ + /** The corresponding context + */ + void* unw_underlying_context; -mc_object_info_t MC_process_find_object_info(mc_process_t process, const void* addr); -mc_object_info_t MC_process_find_object_info_exec(mc_process_t process, const void* addr); -mc_object_info_t MC_process_find_object_info_rw(mc_process_t process, const void* addr); +private: + std::vector ignored_regions_; +}; -dw_frame_t MC_process_find_function(mc_process_t process, const void* ip); +/** Open a FD to a remote process memory (`/dev/$pid/mem`) + */ +int open_vm(pid_t pid, int flags); -static inline xbt_mheap_t MC_process_get_heap(mc_process_t process) -{ - if (MC_process_is_self(process)) - return std_heap; - if (!(process->cache_flags & MC_PROCESS_CACHE_FLAG_HEAP)) - MC_process_refresh_heap(process); - return process->heap; } - -static inline malloc_info* MC_process_get_malloc_info(mc_process_t process) -{ - if (MC_process_is_self(process)) - return std_heap->heapinfo; - if (!(process->cache_flags & MC_PROCESS_CACHE_FLAG_MALLOC_INFO)) - MC_process_refresh_malloc_info(process); - return process->heap_info; } -/** Find (one occurence of) the named variable definition - */ -dw_variable_t MC_process_find_variable_by_name(mc_process_t process, const char* name); +SG_BEGIN_DECL() + +XBT_INTERNAL void MC_invalidate_cache(void); SG_END_DECL()