[nto] Fix nto target stopped by watchpoint.
Fix 'stopped by watchpoint' detection: add inferior data, use inferior data for storing last stopped flags needed for detection. gdb/ChangeLog: * nto-procfs.c (procfs_wait): Set stopped_flags nad stopped_pc. (procfs_stopped_by_watchpoint): Use flags stored in inferior data. * nto-tdep.c (nto_new_inferior_data_reg): New definition. (nto_new_inferior_data, nto_inferior_data_cleanup, nto_inferior_data): New functions. (_initialize_nto_tdep): New forward declaration, new function. * nto-tdep.h (struct nto_inferior_data): New struct. (nto_inferior_data): New function declaration.
This commit is contained in:
Aleksandar Ristovski
parent
2b35fb28f3
commit
a9889169e5
4 changed files with 96 additions and 1 deletions
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@ -1,3 +1,14 @@
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2015-10-21 Aleksandar Ristovski <aristovski@qnx.com>
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* nto-procfs.c (procfs_wait): Set stopped_flags nad stopped_pc.
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(procfs_stopped_by_watchpoint): Use flags stored in inferior data.
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* nto-tdep.c (nto_new_inferior_data_reg): New definition.
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(nto_new_inferior_data, nto_inferior_data_cleanup, nto_inferior_data):
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New functions.
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(_initialize_nto_tdep): New forward declaration, new function.
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* nto-tdep.h (struct nto_inferior_data): New struct.
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(nto_inferior_data): New function declaration.
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2015-10-20 Jan Kratochvil <jan.kratochvil@redhat.com>
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* findvar.c (address_from_register): Check REGNUM validity.
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@ -784,6 +784,9 @@ procfs_wait (struct target_ops *ops,
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devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0);
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}
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nto_inferior_data (NULL)->stopped_flags = status.flags;
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nto_inferior_data (NULL)->stopped_pc = status.ip;
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if (status.flags & _DEBUG_FLAG_SSTEP)
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{
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ourstatus->kind = TARGET_WAITKIND_STOPPED;
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@ -1626,5 +1629,21 @@ procfs_insert_hw_watchpoint (struct target_ops *self,
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static int
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procfs_stopped_by_watchpoint (struct target_ops *ops)
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{
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return 0;
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/* NOTE: nto_stopped_by_watchpoint will be called ONLY while we are
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stopped due to a SIGTRAP. This assumes gdb works in 'all-stop' mode;
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future gdb versions will likely run in 'non-stop' mode in which case
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we will have to store/examine statuses per thread in question.
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Until then, this will work fine. */
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struct inferior *inf = current_inferior ();
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struct nto_inferior_data *inf_data;
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gdb_assert (inf != NULL);
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inf_data = nto_inferior_data (inf);
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return inf_data->stopped_flags
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& (_DEBUG_FLAG_TRACE_RD
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| _DEBUG_FLAG_TRACE_WR
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| _DEBUG_FLAG_TRACE_MODIFY);
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}
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@ -46,6 +46,8 @@ static char default_nto_target[] = "";
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struct nto_target_ops current_nto_target;
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static const struct inferior_data *nto_inferior_data_reg;
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static char *
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nto_target (void)
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{
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@ -477,3 +479,53 @@ nto_read_auxv_from_initial_stack (CORE_ADDR initial_stack, gdb_byte *readbuf,
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}
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return len_read;
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}
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/* Allocate new nto_inferior_data object. */
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static struct nto_inferior_data *
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nto_new_inferior_data (void)
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{
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struct nto_inferior_data *const inf_data
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= XCNEW (struct nto_inferior_data);
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return inf_data;
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}
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/* Free inferior data. */
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static void
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nto_inferior_data_cleanup (struct inferior *const inf, void *const dat)
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{
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xfree (dat);
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}
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/* Return nto_inferior_data for the given INFERIOR. If not yet created,
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construct it. */
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struct nto_inferior_data *
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nto_inferior_data (struct inferior *const inferior)
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{
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struct inferior *const inf = inferior ? inferior : current_inferior ();
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struct nto_inferior_data *inf_data;
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gdb_assert (inf != NULL);
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inf_data = inferior_data (inf, nto_inferior_data_reg);
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if (inf_data == NULL)
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{
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set_inferior_data (inf, nto_inferior_data_reg,
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(inf_data = nto_new_inferior_data ()));
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}
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return inf_data;
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern initialize_file_ftype _initialize_nto_tdep;
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void
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_initialize_nto_tdep (void)
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{
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nto_inferior_data_reg
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= register_inferior_data_with_cleanup (NULL, nto_inferior_data_cleanup);
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}
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@ -142,6 +142,16 @@ struct private_thread_info
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char name[1];
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};
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/* Per-inferior data, common for both procfs and remote. */
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struct nto_inferior_data
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{
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/* Last stopped flags result from wait function */
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unsigned int stopped_flags;
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/* Last known stopped PC */
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CORE_ADDR stopped_pc;
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};
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/* Generic functions in nto-tdep.c. */
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void nto_init_solib_absolute_prefix (void);
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@ -171,4 +181,7 @@ char *nto_extra_thread_info (struct target_ops *self, struct thread_info *);
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LONGEST nto_read_auxv_from_initial_stack (CORE_ADDR inital_stack,
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gdb_byte *readbuf,
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LONGEST len, size_t sizeof_auxv_t);
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struct nto_inferior_data *nto_inferior_data (struct inferior *inf);
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#endif
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