FreeChainXenon/binutils-gdb
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Use std::unique_ptr in reg_buffer

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Using std::unique_ptr allows to remove the manual xfree in the
destructor.

If I understand correctly, using the () after the new operator will make
sure the allocated objects will be value initialized, which for scalars
means they are zero-initialized.  So it should have the same behavior as
XCNEWVEC.

gdb/ChangeLog:

	* regcache.h (reg_buffer) <~reg_buffer>: Use default destructor.
	<m_registers, m_register_status>: Change type to
	std::unique_ptr.
	* regcache.c (reg_buffer::reg_buffer): Use new instead of
	XCNEWVEC.
This commit is contained in:
Simon Marchi 2018-06-09 22:30:34 -04:00 • committed by Simon Marchi
parent aac0d564ce
commit 835dcf9261
3 changed files with 21 additions and 16 deletions
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8
gdb/ChangeLog
View file

@ -1,3 +1,11 @@
2018-06-09 Simon Marchi <simon.marchi@ericsson.com>
* regcache.h (reg_buffer) <~reg_buffer>: Use default destructor.
<m_registers, m_register_status>: Change type to
std::unique_ptr.
* regcache.c (reg_buffer::reg_buffer): Use new instead of
XCNEWVEC.
2018-06-09 Simon Marchi <simon.marchi@ericsson.com>
* common/common-regcache.h (enum register_status): Add

18
gdb/regcache.c
View file

@ -185,15 +185,15 @@ reg_buffer::reg_buffer (gdbarch *gdbarch, bool has_pseudo)
if (has_pseudo)
{
m_registers = XCNEWVEC (gdb_byte, m_descr->sizeof_cooked_registers);
m_register_status
= XCNEWVEC (register_status, m_descr->nr_cooked_registers);
m_registers.reset (new gdb_byte[m_descr->sizeof_cooked_registers] ());
m_register_status.reset
(new register_status[m_descr->nr_cooked_registers] ());
}
else
{
m_registers = XCNEWVEC (gdb_byte, m_descr->sizeof_raw_registers);
m_register_status
= XCNEWVEC (register_status, gdbarch_num_regs (gdbarch));
m_registers.reset (new gdb_byte[m_descr->sizeof_raw_registers] ());
m_register_status.reset
(new register_status[gdbarch_num_regs (gdbarch)] ());
}
}
@ -260,7 +260,7 @@ private:
gdb_byte *
reg_buffer::register_buffer (int regnum) const
{
return m_registers + m_descr->register_offset[regnum];
return m_registers.get () + m_descr->register_offset[regnum];
}
void
@ -273,8 +273,8 @@ reg_buffer::save (regcache_cooked_read_ftype *cooked_read,
/* It should have pseudo registers. */
gdb_assert (m_has_pseudo);
/* Clear the dest. */
memset (m_registers, 0, m_descr->sizeof_cooked_registers);
memset (m_register_status, REG_UNKNOWN, m_descr->nr_cooked_registers);
memset (m_registers.get (), 0, m_descr->sizeof_cooked_registers);
memset (m_register_status.get (), REG_UNKNOWN, m_descr->nr_cooked_registers);
/* Copy over any registers (identified by their membership in the
save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs +
gdbarch_num_pseudo_regs) range is checked since some architectures need

11
gdb/regcache.h
View file

@ -153,11 +153,8 @@ public:
buffer. */
enum register_status get_register_status (int regnum) const;
virtual ~reg_buffer ()
{
xfree (m_registers);
xfree (m_register_status);
}
virtual ~reg_buffer () = default;
protected:
/* Assert on the range of REGNUM. */
void assert_regnum (int regnum) const;
@ -175,9 +172,9 @@ protected:
bool m_has_pseudo;
/* The register buffers. */
gdb_byte *m_registers;
std::unique_ptr<gdb_byte[]> m_registers;
/* Register cache status. */
register_status *m_register_status;
std::unique_ptr<register_status[]> m_register_status;
friend class regcache;
friend class detached_regcache;