dwarf2read.c code cleanup, split out check_line_address
gdb/ChangeLog: * dwarf2read.c (record_line_ftype): New typedef. (check_line_address): New function. (dwarf_decode_lines_1): Call it.
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@ -1,3 +1,9 @@
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2015-05-27 Doug Evans <dje@google.com>
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* dwarf2read.c (record_line_ftype): New typedef.
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(check_line_address): New function.
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(dwarf_decode_lines_1): Call it.
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2015-05-27 Doug Evans <dje@google.com>
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* NEWS: Mention "set debug dwarf-line".
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@ -17475,6 +17475,11 @@ psymtab_include_file_name (const struct line_header *lh, int file_index,
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return include_name;
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}
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/* Function to record a line number. */
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typedef void (record_line_ftype) (struct subfile *subfile, int line,
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CORE_ADDR pc);
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/* Ignore this record_line request. */
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static void
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@ -17574,6 +17579,36 @@ dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile,
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dwarf_record_line (gdbarch, subfile, 0, address, p_record_line);
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}
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/* Check address and if invalid nop-out the rest of the lines in this
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sequence. */
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static void
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check_line_address (struct dwarf2_cu *cu, record_line_ftype **p_record_line,
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const gdb_byte *line_ptr,
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CORE_ADDR lowpc, CORE_ADDR address)
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{
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/* If address < lowpc then it's not a usable value, it's outside the
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pc range of the CU. However, we restrict the test to only address
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values of zero to preserve GDB's previous behaviour which is to
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handle the specific case of a function being GC'd by the linker. */
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if (address == 0 && address < lowpc)
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{
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/* This line table is for a function which has been
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GCd by the linker. Ignore it. PR gdb/12528 */
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struct objfile *objfile = cu->objfile;
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long line_offset = line_ptr - get_debug_line_section (cu)->buffer;
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complaint (&symfile_complaints,
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_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
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line_offset, objfile_name (objfile));
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*p_record_line = noop_record_line;
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/* Note: *p_record_line is left as noop_record_line
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until we see DW_LNE_end_sequence. */
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}
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}
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/* Subroutine of dwarf_decode_lines to simplify it.
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Process the line number information in LH. */
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@ -17707,31 +17742,10 @@ dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu,
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break;
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case DW_LNE_set_address:
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address = read_address (abfd, line_ptr, cu, &bytes_read);
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/* If address < lowpc then it's not a usable value, it's
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outside the pc range of the CU. However, we restrict
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the test to only address values of zero to preserve
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GDB's previous behaviour which is to handle the specific
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case of a function being GC'd by the linker. */
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if (address == 0 && address < lowpc)
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{
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/* This line table is for a function which has been
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GCd by the linker. Ignore it. PR gdb/12528 */
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long line_offset
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= line_ptr - get_debug_line_section (cu)->buffer;
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complaint (&symfile_complaints,
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_(".debug_line address at offset 0x%lx is 0 "
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"[in module %s]"),
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line_offset, objfile_name (objfile));
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p_record_line = noop_record_line;
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/* Note: p_record_line is left as noop_record_line
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until we see DW_LNE_end_sequence. */
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}
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op_index = 0;
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line_ptr += bytes_read;
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check_line_address (cu, &p_record_line, line_ptr,
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lowpc, address);
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op_index = 0;
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address += baseaddr;
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address = gdbarch_adjust_dwarf2_line (gdbarch, address, 0);
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break;
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