Convert some frame functions to use gdb::array_view.

This patch converts the most obvious functions from gdb/frame.h to use
the gdb::array_view abstraction.  I've converted the ones that used buffer +
length.

There are others using only the buffer, with an implicit size. I did not
touch those for now. But it would be nice to pass the size for safety.

Tested with --enable-targets=all on Ubuntu 18.04/20.04 aarch64-linux.

gdb/ChangeLog

2021-01-19  Luis Machado  <luis.machado@linaro.org>

	* frame.h (get_frame_register_bytes): Pass a gdb::array_view instead
	of buffer + length.
	(put_frame_register_bytes): Likewise.
	Adjust documentation.
	(get_frame_memory): Pass a gdb::array_view instead of buffer + length.
	(safe_frame_unwind_memory): Likewise.
	* frame.c (get_frame_register_bytes, put_frame_register_bytes)
	(get_frame_memory, safe_frame_unwind_memory): Adjust to use
	gdb::array_view.
	* amd64-fbsd-tdep.c (amd64fbsd_sigtramp_p): Likewise.
	* amd64-linux-tdep.c (amd64_linux_sigtramp_start): Likewise.
	* amd64-obsd-tdep.c (amd64obsd_sigtramp_p): Likewise.
	* arc-linux-tdep.c (arc_linux_is_sigtramp): Likewise.
	* cris-tdep.c (cris_sigtramp_start, cris_rt_sigtramp_start): Likewise.
	* dwarf2/loc.c (rw_pieced_value): Likewise.
	* hppa-tdep.c (hppa_frame_cache): Likewise.
	* i386-fbsd-tdep.c (i386fbsd_sigtramp_p): Likewise.
	* i386-gnu-tdep.c (i386_gnu_sigtramp_start): Likewise.
	* i386-linux-tdep.c (i386_linux_sigtramp_start)
	(i386_linux_rt_sigtramp_start): Likewise.
	* i386-obsd-tdep.c (i386obsd_sigtramp_p): Likewise.
	* i386-tdep.c (i386_register_to_value): Likewise.
	* i387-tdep.c (i387_register_to_value): Likewise.
	* ia64-tdep.c (ia64_register_to_value): Likewise.
	* m32r-linux-tdep.c (m32r_linux_sigtramp_start)
	(m32r_linux_rt_sigtramp_start): Likewise.
	* m68k-linux-tdep.c (m68k_linux_pc_in_sigtramp): Likewise.
	* m68k-tdep.c (m68k_register_to_value): Likewise.
	* mips-tdep.c (mips_register_to_value)
	(mips_value_to_register): Likewise.
	* ppc-fbsd-tdep.c (ppcfbsd_sigtramp_frame_sniffer)
	(ppcfbsd_sigtramp_frame_cache): Likewise.
	* ppc-obsd-tdep.c (ppcobsd_sigtramp_frame_sniffer)
	(ppcobsd_sigtramp_frame_cache): Likewise.
	* rs6000-tdep.c (rs6000_in_function_epilogue_frame_p)
	(rs6000_register_to_value): Likewise.
	* tilegx-tdep.c (tilegx_analyze_prologue): Likewise.
	* tramp-frame.c (tramp_frame_start): Likewise.
	* valops.c (value_assign): Likewise.

1 files changed, 8 insertions, 8 deletions

diff --git a/gdb/frame.h b/gdb/frame.h
index 7028b26..597a459 100644
--- a/gdb/frame.h
+++ b/gdb/frame.h
@@ -653,15 +653,15 @@ extern void put_frame_register (struct frame_info *frame, int regnum,
    contents are optimized out or unavailable, set *OPTIMIZEDP,
    *UNAVAILABLEP accordingly.  */
 extern bool get_frame_register_bytes (frame_info *frame, int regnum,
-				      CORE_ADDR offset, int len,
-				      gdb_byte *myaddr,
+				      CORE_ADDR offset,
+				      gdb::array_view<gdb_byte> buffer,
 				      int *optimizedp, int *unavailablep);
 
-/* Write LEN bytes to one or multiple registers starting with REGNUM
-   in frame FRAME, starting at OFFSET, into BUF.  */
+/* Write bytes from BUFFER to one or multiple registers starting with REGNUM
+   in frame FRAME, starting at OFFSET.  */
 extern void put_frame_register_bytes (struct frame_info *frame, int regnum,
-				      CORE_ADDR offset, int len,
-				      const gdb_byte *myaddr);
+				      CORE_ADDR offset,
+				      gdb::array_view<const gdb_byte> buffer);
 
 /* Unwind the PC.  Strictly speaking return the resume address of the
    calling frame.  For GDB, `pc' is the resume address and not a
@@ -687,7 +687,7 @@ extern void frame_pop (struct frame_info *frame);
    adaptor frames this should be ok.  */
 
 extern void get_frame_memory (struct frame_info *this_frame, CORE_ADDR addr,
-			      gdb_byte *buf, int len);
+			      gdb::array_view<gdb_byte> buffer);
 extern LONGEST get_frame_memory_signed (struct frame_info *this_frame,
 					CORE_ADDR memaddr, int len);
 extern ULONGEST get_frame_memory_unsigned (struct frame_info *this_frame,
@@ -696,7 +696,7 @@ extern ULONGEST get_frame_memory_unsigned (struct frame_info *this_frame,
 /* Same as above, but return true zero when the entire memory read
    succeeds, false otherwise.  */
 extern bool safe_frame_unwind_memory (frame_info *this_frame, CORE_ADDR addr,
-				      gdb_byte *buf, int len);
+				      gdb::array_view<gdb_byte> buffer);
 
 /* Return this frame's architecture.  */
 extern struct gdbarch *get_frame_arch (struct frame_info *this_frame);