diff options
author | Simon Marchi <simon.marchi@efficios.com> | 2021-02-02 10:40:52 -0500 |
---|---|---|
committer | Simon Marchi <simon.marchi@polymtl.ca> | 2021-02-02 10:40:52 -0500 |
commit | 962effa79018f57766d9aee21493f616801778dc (patch) | |
tree | 7ed2b2d492b4e7f3f48f7ac4b1df87fde6356109 /gdb/testsuite/lib | |
parent | a1c4010369aaa3ead33b7a5c248be9693d51b856 (diff) | |
download | gdb-962effa79018f57766d9aee21493f616801778dc.zip gdb-962effa79018f57766d9aee21493f616801778dc.tar.gz gdb-962effa79018f57766d9aee21493f616801778dc.tar.bz2 |
gdb/testsuite: add .debug_rnglists tests
Add tests for the various issues fixed in the previous patches.
Add a new "rnglists" procedure to the DWARF assembler, to allow
generating .debug_rnglists sections. A trivial change is required to
support the DWARF 5 CU header layout.
gdb/testsuite/ChangeLog:
PR gdb/26813
* lib/dwarf.exp (_handle_DW_FORM): Handle DW_FORM_rnglistx.
(cu): Generate header for DWARF 5.
(rnglists): New proc.
* gdb.dwarf2/rnglists-multiple-cus.exp: New.
* gdb.dwarf2/rnglists-sec-offset.exp: New.
Change-Id: I5b297e59c370c60cf671dec19796a6c3b9a9f632
Diffstat (limited to 'gdb/testsuite/lib')
-rw-r--r-- | gdb/testsuite/lib/dwarf.exp | 187 |
1 files changed, 184 insertions, 3 deletions
diff --git a/gdb/testsuite/lib/dwarf.exp b/gdb/testsuite/lib/dwarf.exp index 7462890..aba4afb 100644 --- a/gdb/testsuite/lib/dwarf.exp +++ b/gdb/testsuite/lib/dwarf.exp @@ -473,7 +473,8 @@ namespace eval Dwarf { } DW_FORM_ref_udata - - DW_FORM_udata { + DW_FORM_udata - + DW_FORM_rnglistx { _op .uleb128 $value } @@ -1115,8 +1116,16 @@ namespace eval Dwarf { } define_label $start_label _op .2byte $_cu_version Version - _op .${_cu_offset_size}byte $my_abbrevs Abbrevs - _op .byte $_cu_addr_size "Pointer size" + + # The CU header for DWARF 4 and 5 are slightly different. + if { $_cu_version == 5 } { + _op .byte 0x1 "DW_UT_compile" + _op .byte $_cu_addr_size "Pointer size" + _op .${_cu_offset_size}byte $my_abbrevs Abbrevs + } else { + _op .${_cu_offset_size}byte $my_abbrevs Abbrevs + _op .byte $_cu_addr_size "Pointer size" + } _defer_output $_abbrev_section { define_label $my_abbrevs @@ -1306,6 +1315,178 @@ namespace eval Dwarf { uplevel $body } + # Emit a DWARF .debug_rnglists section. + # + # The target address size is based on the current target's address size. + # + # There is one mandatory positional argument, BODY, which must be Tcl code + # that emits the content of the section. It is evaluated in the caller's + # context. + # + # The following option can be used: + # + # - -is-64 true|false: Whether to use 64-bit DWARF instead of 32-bit DWARF. + # The default is 32-bit. + + proc rnglists { args } { + variable _debug_rnglists_addr_size + variable _debug_rnglists_offset_size + variable _debug_rnglists_is_64_dwarf + + parse_args {{"is-64" "false"}} + + if { [llength $args] != 1 } { + error "rnglists proc expects one positional argument (body)" + } + + lassign $args body + + if [is_64_target] { + set _debug_rnglists_addr_size 8 + } else { + set _debug_rnglists_addr_size 4 + } + + if { ${is-64} } { + set _debug_rnglists_offset_size 8 + set _debug_rnglists_is_64_dwarf true + } else { + set _debug_rnglists_offset_size 4 + set _debug_rnglists_is_64_dwarf false + } + + _section ".debug_rnglists" + + # Count of tables in the section. + variable _debug_rnglists_table_count 0 + + # Compute the label name for list at index LIST_IDX, for the current + # table. + + proc _compute_list_label { list_idx } { + variable _debug_rnglists_table_count + + return ".Lrnglists_table_${_debug_rnglists_table_count}_list_${list_idx}" + } + + # Generate one table (header + offset array + range lists). + # + # Accepts one positional argument, BODY. BODY may call the LIST_ + # procedure to generate rnglists. + # + # The -post-header-label option can be used to define a label just after + # the header of the table. This is the label that a DW_AT_rnglists_base + # attribute will usually refer to. + + proc table { args } { + variable _debug_rnglists_table_count + variable _debug_rnglists_addr_size + variable _debug_rnglists_offset_size + variable _debug_rnglists_is_64_dwarf + + parse_args {{post-header-label ""}} + + if { [llength $args] != 1 } { + error "table proc expects one positional argument (body)" + } + + lassign $args body + + # Generate one range list. + # + # BODY may call the various procs defined below to generate list entries. + # They correspond to the range list entry kinds described in section 2.17.3 + # of the DWARF 5 spec. + # + # To define a label pointing to the beginning of the list, use + # the conventional way of declaring and defining labels: + # + # declare_labels the_list + # + # the_list: list_ { + # ... + # } + + proc list_ { body } { + variable _debug_rnglists_list_count + + # Define a label for this list. It is used to build the offset + # array later. + set list_label [_compute_list_label $_debug_rnglists_list_count] + define_label $list_label + + # Emit a DW_RLE_start_end entry. + + proc start_end { start end } { + variable _debug_rnglists_addr_size + + _op .byte 0x06 "DW_RLE_start_end" + _op .${_debug_rnglists_addr_size}byte $start "start" + _op .${_debug_rnglists_addr_size}byte $end "end" + } + + uplevel $body + + # Emit end of list. + _op .byte 0x00 "DW_RLE_end_of_list" + + incr _debug_rnglists_list_count + } + + # Count of lists in the table. + variable _debug_rnglists_list_count 0 + + # Generate the lists ops first, because we need to know how many + # lists there are to generate the header and offset table. + set lists_ops [_defer_to_string { + uplevel $body + }] + + set post_unit_len_label \ + [_compute_label "rnglists_table_${_debug_rnglists_table_count}_post_unit_len"] + set post_header_label \ + [_compute_label "rnglists_table_${_debug_rnglists_table_count}_post_header"] + set table_end_label \ + [_compute_label "rnglists_table_${_debug_rnglists_table_count}_end"] + + # Emit the table header. + if { $_debug_rnglists_is_64_dwarf } { + _op .4byte 0xffffffff "unit length 1/2" + _op .8byte "$table_end_label - $post_unit_len_label" "unit length 2/2" + } else { + _op .4byte "$table_end_label - $post_unit_len_label" "unit length" + } + + define_label $post_unit_len_label + + _op .2byte 5 "dwarf version" + _op .byte $_debug_rnglists_addr_size "address size" + _op .byte 0 "segment selector size" + _op .4byte "$_debug_rnglists_list_count" "offset entry count" + + define_label $post_header_label + + # Define the user post-header label, if provided. + if { ${post-header-label} != "" } { + define_label ${post-header-label} + } + + # Emit the offset array. + for {set list_idx 0} {$list_idx < $_debug_rnglists_list_count} {incr list_idx} { + set list_label [_compute_list_label $list_idx] + _op .${_debug_rnglists_offset_size}byte "$list_label - $post_header_label" "offset of list $list_idx" + } + + # Emit the actual list data. + _emit "$lists_ops" + + define_label $table_end_label + + incr _debug_rnglists_table_count + } + + uplevel $body + } # Emit a DWARF .debug_line unit. # OPTIONS is a list with an even number of elements containing |