From 61f75dd8bf47e258a2012f74c41fa09f375a30ad Mon Sep 17 00:00:00 2001 From: Michael Snyder Date: Thu, 15 Oct 2009 17:15:56 +0000 Subject: [PATCH] 2009-10-15 Michael Snyder * record.c (record_reg_alloc): New function. (record_reg_release): New function. (record_mem_alloc): New function. (record_mem_release): New function. (record_end_alloc): New function. (record_end_release): New function. (record_entry_release): New function. (record_list_release): Simplify, call record_entry_release. (record_list_release_next): Rename to record_list_release_following. Simplify and call record_entry_release. (record_list_release_first): Simplify, comment, and use record_entry_release. (record_arch_list_add_reg): Simplify, call record_reg_alloc. (record_arch_list_add_mem): Simplify, call record_mem_alloc. (record_arch_list_add_end): Simplify, call record_end_alloc. --- gdb/ChangeLog | 20 ++++- gdb/record.c | 204 ++++++++++++++++++++++++++++++++++---------------- 2 files changed, 158 insertions(+), 66 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index edd535c9718..fd1957fb5e5 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,4 +1,22 @@ -2009-10-12 Michael Snyder +2009-10-15 Michael Snyder + + * record.c (record_reg_alloc): New function. + (record_reg_release): New function. + (record_mem_alloc): New function. + (record_mem_release): New function. + (record_end_alloc): New function. + (record_end_release): New function. + (record_entry_release): New function. + (record_list_release): Simplify, call record_entry_release. + (record_list_release_next): Rename to record_list_release_following. + Simplify and call record_entry_release. + (record_list_release_first): Simplify, comment, and use + record_entry_release. + (record_arch_list_add_reg): Simplify, call record_reg_alloc. + (record_arch_list_add_mem): Simplify, call record_mem_alloc. + (record_arch_list_add_end): Simplify, call record_end_alloc. + +2009-10-14 Michael Snyder * record.c (record_list_release_first): Do not decrement record_insn_num. diff --git a/gdb/record.c b/gdb/record.c index e59a9008b5a..58e02fc7846 100644 --- a/gdb/record.c +++ b/gdb/record.c @@ -129,50 +129,143 @@ static int (*record_beneath_to_insert_breakpoint) (struct gdbarch *, static int (*record_beneath_to_remove_breakpoint) (struct gdbarch *, struct bp_target_info *); +/* Alloc and free functions for record_reg, record_mem, and record_end + entries. */ + +/* Alloc a record_reg record entry. */ + +static inline struct record_entry * +record_reg_alloc (struct regcache *regcache, int regnum) +{ + struct record_entry *rec; + struct gdbarch *gdbarch = get_regcache_arch (regcache); + + rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); + rec->type = record_reg; + rec->u.reg.num = regnum; + rec->u.reg.val = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE); + + return rec; +} + +/* Free a record_reg record entry. */ + +static inline void +record_reg_release (struct record_entry *rec) +{ + gdb_assert (rec->type == record_reg); + xfree (rec->u.reg.val); + xfree (rec); +} + +/* Alloc a record_mem record entry. */ + +static inline struct record_entry * +record_mem_alloc (CORE_ADDR addr, int len) +{ + struct record_entry *rec; + + rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); + rec->type = record_mem; + rec->u.mem.addr = addr; + rec->u.mem.len = len; + rec->u.mem.val = (gdb_byte *) xmalloc (len); + + return rec; +} + +/* Free a record_mem record entry. */ + +static inline void +record_mem_release (struct record_entry *rec) +{ + gdb_assert (rec->type == record_mem); + xfree (rec->u.mem.val); + xfree (rec); +} + +/* Alloc a record_end record entry. */ + +static inline struct record_entry * +record_end_alloc (void) +{ + struct record_entry *rec; + + rec = (struct record_entry *) xcalloc (1, sizeof (struct record_entry)); + rec->type = record_end; + + return rec; +} + +/* Free a record_end record entry. */ + +static inline void +record_end_release (struct record_entry *rec) +{ + xfree (rec); +} + +/* Free one record entry, any type. + Return entry->type, in case caller wants to know. */ + +static inline enum record_type +record_entry_release (struct record_entry *rec) +{ + enum record_type type = rec->type; + + switch (type) { + case record_reg: + record_reg_release (rec); + break; + case record_mem: + record_mem_release (rec); + break; + case record_end: + record_end_release (rec); + break; + } + return type; +} + +/* Free all record entries in list pointed to by REC. */ + static void record_list_release (struct record_entry *rec) { - struct record_entry *tmp; - if (!rec) return; while (rec->next) - { - rec = rec->next; - } + rec = rec->next; while (rec->prev) { - tmp = rec; rec = rec->prev; - if (tmp->type == record_reg) - xfree (tmp->u.reg.val); - else if (tmp->type == record_mem) - xfree (tmp->u.mem.val); - xfree (tmp); + record_entry_release (rec->next); } - if (rec != &record_first) - xfree (rec); + if (rec == &record_first) + { + record_insn_num = 0; + record_first.next = NULL; + } + else + record_entry_release (rec); } +/* Free all record entries forward of the given list position. */ + static void -record_list_release_next (void) +record_list_release_following (struct record_entry *rec) { - struct record_entry *rec = record_list; struct record_entry *tmp = rec->next; + rec->next = NULL; while (tmp) { rec = tmp->next; - if (tmp->type == record_end) + if (record_entry_release (tmp) == record_end) record_insn_num--; - else if (tmp->type == record_reg) - xfree (tmp->u.reg.val); - else if (tmp->type == record_mem) - xfree (tmp->u.mem.val); - xfree (tmp); tmp = rec; } } @@ -185,34 +278,31 @@ record_list_release_next (void) static void record_list_release_first (void) { - struct record_entry *tmp = NULL; - enum record_type type; + struct record_entry *tmp; if (!record_first.next) return; + /* Loop until a record_end. */ while (1) { - type = record_first.next->type; - - if (type == record_reg) - xfree (record_first.next->u.reg.val); - else if (type == record_mem) - xfree (record_first.next->u.mem.val); + /* Cut record_first.next out of the linked list. */ tmp = record_first.next; record_first.next = tmp->next; - xfree (tmp); + tmp->next->prev = &record_first; + + /* tmp is now isolated, and can be deleted. */ + if (record_entry_release (tmp) == record_end) + { + record_insn_num--; + break; /* End loop at first record_end. */ + } if (!record_first.next) { gdb_assert (record_insn_num == 1); - break; + break; /* End loop when list is empty. */ } - - record_first.next->prev = &record_first; - - if (type == record_end) - break; } } @@ -239,10 +329,10 @@ record_arch_list_add (struct record_entry *rec) } } -/* Record the value of a register NUM to record_arch_list. */ +/* Record the value of a register REGNUM to record_arch_list. */ int -record_arch_list_add_reg (struct regcache *regcache, int num) +record_arch_list_add_reg (struct regcache *regcache, int regnum) { struct record_entry *rec; @@ -250,16 +340,11 @@ record_arch_list_add_reg (struct regcache *regcache, int num) fprintf_unfiltered (gdb_stdlog, "Process record: add register num = %d to " "record list.\n", - num); + regnum); - rec = (struct record_entry *) xmalloc (sizeof (struct record_entry)); - rec->u.reg.val = (gdb_byte *) xmalloc (MAX_REGISTER_SIZE); - rec->prev = NULL; - rec->next = NULL; - rec->type = record_reg; - rec->u.reg.num = num; + rec = record_reg_alloc (regcache, regnum); - regcache_raw_read (regcache, num, rec->u.reg.val); + regcache_raw_read (regcache, regnum, rec->u.reg.val); record_arch_list_add (rec); @@ -280,17 +365,10 @@ record_arch_list_add_mem (CORE_ADDR addr, int len) "record list.\n", paddress (target_gdbarch, addr), len); - if (!addr) + if (!addr) /* FIXME: Why? Some arch must permit it... */ return 0; - rec = (struct record_entry *) xmalloc (sizeof (struct record_entry)); - rec->u.mem.val = (gdb_byte *) xmalloc (len); - rec->prev = NULL; - rec->next = NULL; - rec->type = record_mem; - rec->u.mem.addr = addr; - rec->u.mem.len = len; - rec->u.mem.mem_entry_not_accessible = 0; + rec = record_mem_alloc (addr, len); if (target_read_memory (addr, rec->u.mem.val, len)) { @@ -299,8 +377,7 @@ record_arch_list_add_mem (CORE_ADDR addr, int len) "Process record: error reading memory at " "addr = %s len = %d.\n", paddress (target_gdbarch, addr), len); - xfree (rec->u.mem.val); - xfree (rec); + record_mem_release (rec); return -1; } @@ -320,10 +397,7 @@ record_arch_list_add_end (void) fprintf_unfiltered (gdb_stdlog, "Process record: add end to arch list.\n"); - rec = (struct record_entry *) xmalloc (sizeof (struct record_entry)); - rec->prev = NULL; - rec->next = NULL; - rec->type = record_end; + rec = record_end_alloc (); rec->u.end.sigval = TARGET_SIGNAL_0; record_arch_list_add (rec); @@ -818,7 +892,7 @@ record_wait (struct target_ops *ops, else { if (target_write_memory (record_list->u.mem.addr, - record_list->u.mem.val, + record_list->u.mem.val, record_list->u.mem.len)) { if (execution_direction != EXEC_REVERSE) @@ -1059,7 +1133,7 @@ record_store_registers (struct target_ops *ops, struct regcache *regcache, } /* Destroy the record from here forward. */ - record_list_release_next (); + record_list_release_following (record_list); } record_registers_change (regcache, regno); @@ -1091,7 +1165,7 @@ record_xfer_partial (struct target_ops *ops, enum target_object object, error (_("Process record canceled the operation.")); /* Destroy the record from here forward. */ - record_list_release_next (); + record_list_release_following (record_list); } /* Check record_insn_num */ @@ -1231,7 +1305,7 @@ cmd_record_delete (char *args, int from_tty) if (!from_tty || query (_("Delete the log from this point forward " "and begin to record the running message " "at current PC?"))) - record_list_release_next (); + record_list_release_following (record_list); } else printf_unfiltered (_("Already at end of record list.\n")); -- 2.30.2