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Thu, 30 Nov 2023 08:31:10 -0800 (PST) X-Google-Smtp-Source: AGHT+IFlKYB9Zra/pmjqQuX6RgNqCoPCLAghAzT63fcBcqKWA0rUuLWgWvj2ETFXAQpSLZbnXS9fTsfCcLwtKDCeS5g= X-Received: by 2002:a17:90b:33c2:b0:286:4c54:382 with SMTP id lk2-20020a17090b33c200b002864c540382mr1328450pjb.19.1701361869542; Thu, 30 Nov 2023 08:31:09 -0800 (PST) MIME-Version: 1.0 References: <20231028002008.1105723-1-amerey@redhat.com> <20231028002008.1105723-5-amerey@redhat.com> In-Reply-To: From: Aaron Merey Date: Thu, 30 Nov 2023 11:30:57 -0500 Message-ID: Subject: [PING*3][PATCH 4/4 v5] gdb/debuginfod: Add .debug_line downloading To: gdb-patches@sourceware.org Cc: Andrew Burgess X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-11.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Ping Thanks, Aaron On Mon, Nov 20, 2023 at 1:40=E2=80=AFPM Aaron Merey wro= te: > > Ping > > Thanks, > Aaron > > On Sun, Nov 12, 2023 at 3:21=E2=80=AFPM Aaron Merey w= rote: > > > > Ping > > > > Thanks, > > Aaron > > > > On Fri, Oct 27, 2023 at 8:20=E2=80=AFPM Aaron Merey = wrote: > > > > > > v4: https://sourceware.org/pipermail/gdb-patches/2023-August/201651.h= tml > > > > > > v5 adds prefix_state to progress_update objects to track when > > > a newline prefix needs to be added to a download progress message. > > > This is used to correctly format progress messages that occur during > > > command autocompletion. > > > > > > Commit message: > > > > > > ELF/DWARF section downloading allows gdb to download .gdb_index files= in > > > order to defer full debuginfo downloads. However .gdb_index does not > > > contain any information regarding source filenames. When a gdb comma= nd > > > includes a filename argument (ex. 'break main.c:50'), this results in > > > the mass downloading of all deferred debuginfo so that gdb can search= the > > > debuginfo for matching source filenames. This can result in unnecess= ary > > > downloads. > > > > > > To improve this, have gdb instead download each debuginfo's .debug_li= ne > > > (and .debug_line_str if using DWARF5) when executing these commands. > > > Download full debuginfo only when its .debug_line contains a matching > > > filename. > > > > > > Since the combined size of .debug_line and .debug_line_str is only ab= out > > > 1% the size of the corresponding debuginfo, significant time can be s= aved > > > by checking these sections before choosing to download an entire debu= ginfo. > > > > > > This patch also redirects stdout and stderr of the debuginfod server > > > used by testsuite/gdb.debuginfod tests to a server_log standard outpu= t > > > file. While adding tests for this patch I ran into an issue where th= e > > > test server would block when logging to stderr, presumably because th= e > > > stderr buffer filled up and wasn't being read from. Redirecting the > > > log to a file fixes this and also makes the server log more accessibl= e > > > when debugging test failures. > > > --- > > > gdb/cli-out.c | 11 +- > > > gdb/completer.c | 18 +- > > > gdb/dwarf2/line-header.c | 215 +++++++++++++++------= -- > > > gdb/dwarf2/line-header.h | 10 ++ > > > gdb/dwarf2/read-gdb-index.c | 60 +++++++ > > > gdb/dwarf2/read.c | 208 +++++++++++++++++++++= + > > > gdb/dwarf2/read.h | 37 ++++ > > > gdb/mi/mi-out.c | 9 +- > > > gdb/testsuite/gdb.debuginfod/section.exp | 21 +++ > > > gdb/ui-out.c | 3 + > > > gdb/ui-out.h | 20 +++ > > > 11 files changed, 531 insertions(+), 81 deletions(-) > > > > > > diff --git a/gdb/cli-out.c b/gdb/cli-out.c > > > index c919622d418..a570a2d939d 100644 > > > --- a/gdb/cli-out.c > > > +++ b/gdb/cli-out.c > > > @@ -307,16 +307,23 @@ cli_ui_out::do_progress_notify (const std::stri= ng &msg, > > > > > > if (info.state =3D=3D progress_update::START) > > > { > > > + std::string prefix; > > > + if (cur_prefix_state =3D=3D prefix_state_t::NEWLINE_NEEDED) > > > + { > > > + prefix =3D "\n"; > > > + cur_prefix_state =3D prefix_state_t::NEWLINE_PRINTED; > > > + } > > > + > > > if (stream->isatty () > > > && current_ui->input_interactive_p () > > > && chars_per_line >=3D MIN_CHARS_PER_LINE) > > > { > > > - gdb_printf (stream, "%s\n", msg.c_str ()); > > > + gdb_printf (stream, "%s\n", (prefix + msg).c_str ()); > > > info.state =3D progress_update::BAR; > > > } > > > else > > > { > > > - gdb_printf (stream, "%s...\n", msg.c_str ()); > > > + gdb_printf (stream, "%s...\n", (prefix + msg).c_str ()); > > > info.state =3D progress_update::WORKING; > > > } > > > } > > > diff --git a/gdb/completer.c b/gdb/completer.c > > > index 2abf3998345..9c299f3eb65 100644 > > > --- a/gdb/completer.c > > > +++ b/gdb/completer.c > > > @@ -1345,6 +1345,10 @@ complete_line_internal_1 (completion_tracker &= tracker, > > > { > > > /* We've recognized a full command. */ > > > > > > + /* Disable pagination since responding to the pagination promp= t > > > + overwrites rl_line_buffer. */ > > > + scoped_restore pag_restore =3D make_scoped_restore (&paginatio= n_enabled, false); > > > + > > > if (p =3D=3D tmp_command + point) > > > { > > > /* There is no non-whitespace in the line beyond the > > > @@ -1444,7 +1448,8 @@ complete_line_internal_1 (completion_tracker &t= racker, > > > } > > > > > > /* Wrapper around complete_line_internal_1 to handle > > > - MAX_COMPLETIONS_REACHED_ERROR. */ > > > + MAX_COMPLETIONS_REACHED_ERROR and possible progress update > > > + interactions. */ > > > > > > static void > > > complete_line_internal (completion_tracker &tracker, > > > @@ -1452,6 +1457,11 @@ complete_line_internal (completion_tracker &tr= acker, > > > const char *line_buffer, int point, > > > complete_line_internal_reason reason) > > > { > > > + scoped_restore restore_prefix_state > > > + =3D make_scoped_restore > > > + (&cur_prefix_state, > > > + ui_out::progress_update::prefix_state::NEWLINE_NEEDED); > > > + > > > try > > > { > > > complete_line_internal_1 (tracker, text, line_buffer, point, r= eason); > > > @@ -1461,6 +1471,12 @@ complete_line_internal (completion_tracker &tr= acker, > > > if (except.error !=3D MAX_COMPLETIONS_REACHED_ERROR) > > > throw; > > > } > > > + > > > + /* If progress update messages printed, then the text being comple= ted > > > + needs to be printed again. */ > > > + if (cur_prefix_state > > > + =3D=3D ui_out::progress_update::prefix_state::NEWLINE_PRINTED) > > > + rl_forced_update_display (); > > > } > > > > > > /* See completer.h. */ > > > diff --git a/gdb/dwarf2/line-header.c b/gdb/dwarf2/line-header.c > > > index d072a91bac9..b9210d84f6b 100644 > > > --- a/gdb/dwarf2/line-header.c > > > +++ b/gdb/dwarf2/line-header.c > > > @@ -102,50 +102,57 @@ read_checked_initial_length_and_offset (bfd *ab= fd, const gdb_byte *buf, > > > { > > > LONGEST length =3D read_initial_length (abfd, buf, bytes_read); > > > > > > - gdb_assert (cu_header->initial_length_size =3D=3D 4 > > > - || cu_header->initial_length_size =3D=3D 8 > > > - || cu_header->initial_length_size =3D=3D 12); > > > + if (cu_header !=3D nullptr) > > > + { > > > + gdb_assert (cu_header->initial_length_size =3D=3D 4 > > > + || cu_header->initial_length_size =3D=3D 8 > > > + || cu_header->initial_length_size =3D=3D 12); > > > > > > - if (cu_header->initial_length_size !=3D *bytes_read) > > > - complaint (_("intermixed 32-bit and 64-bit DWARF sections")); > > > + if (cu_header->initial_length_size !=3D *bytes_read) > > > + complaint (_("intermixed 32-bit and 64-bit DWARF sections")); > > > + } > > > > > > *offset_size =3D (*bytes_read =3D=3D 4) ? 4 : 8; > > > return length; > > > } > > > > > > -/* Read directory or file name entry format, starting with byte of > > > - format count entries, ULEB128 pairs of entry formats, ULEB128 of > > > - entries count and the entries themselves in the described entry > > > - format. */ > > > + > > > +/* Like read_formatted_entries but the .debug_line and .debug_line_s= tr > > > + are stored in LINE_BUFP and LINE_STR_DATA. This is used for case= s > > > + where these sections are read from separate files without necessa= rily > > > + having access to the entire debuginfo file they originate from. = */ > > > > > > static void > > > -read_formatted_entries (dwarf2_per_objfile *per_objfile, bfd *abfd, > > > - const gdb_byte **bufp, struct line_header *lh= , > > > - unsigned int offset_size, > > > - void (*callback) (struct line_header *lh, > > > - const char *name, > > > - dir_index d_index, > > > - unsigned int mod_time, > > > - unsigned int length)) > > > +read_formatted_entries > > > + (bfd *parent_bfd, const gdb_byte **line_bufp, > > > + const gdb::array_view line_str_data, > > > + struct line_header *lh, > > > + unsigned int offset_size, > > > + void (*callback) (struct line_header *lh, > > > + const char *name, > > > + dir_index d_index, > > > + unsigned int mod_time, > > > + unsigned int length)) > > > { > > > gdb_byte format_count, formati; > > > ULONGEST data_count, datai; > > > - const gdb_byte *buf =3D *bufp; > > > + const gdb_byte *buf =3D *line_bufp; > > > + const gdb_byte *str_buf =3D line_str_data.data (); > > > const gdb_byte *format_header_data; > > > unsigned int bytes_read; > > > > > > - format_count =3D read_1_byte (abfd, buf); > > > + format_count =3D read_1_byte (parent_bfd, buf); > > > buf +=3D 1; > > > format_header_data =3D buf; > > > for (formati =3D 0; formati < format_count; formati++) > > > { > > > - read_unsigned_leb128 (abfd, buf, &bytes_read); > > > + read_unsigned_leb128 (parent_bfd, buf, &bytes_read); > > > buf +=3D bytes_read; > > > - read_unsigned_leb128 (abfd, buf, &bytes_read); > > > + read_unsigned_leb128 (parent_bfd, buf, &bytes_read); > > > buf +=3D bytes_read; > > > } > > > > > > - data_count =3D read_unsigned_leb128 (abfd, buf, &bytes_read); > > > + data_count =3D read_unsigned_leb128 (parent_bfd, buf, &bytes_read)= ; > > > buf +=3D bytes_read; > > > for (datai =3D 0; datai < data_count; datai++) > > > { > > > @@ -154,10 +161,10 @@ read_formatted_entries (dwarf2_per_objfile *per= _objfile, bfd *abfd, > > > > > > for (formati =3D 0; formati < format_count; formati++) > > > { > > > - ULONGEST content_type =3D read_unsigned_leb128 (abfd, forma= t, &bytes_read); > > > + ULONGEST content_type =3D read_unsigned_leb128 (parent_bfd,= format, &bytes_read); > > > format +=3D bytes_read; > > > > > > - ULONGEST form =3D read_unsigned_leb128 (abfd, format, &byt= es_read); > > > + ULONGEST form =3D read_unsigned_leb128 (parent_bfd, format= , &bytes_read); > > > format +=3D bytes_read; > > > > > > gdb::optional string; > > > @@ -166,36 +173,48 @@ read_formatted_entries (dwarf2_per_objfile *per= _objfile, bfd *abfd, > > > switch (form) > > > { > > > case DW_FORM_string: > > > - string.emplace (read_direct_string (abfd, buf, &bytes_r= ead)); > > > + string.emplace (read_direct_string (parent_bfd, buf, &b= ytes_read)); > > > buf +=3D bytes_read; > > > break; > > > > > > case DW_FORM_line_strp: > > > { > > > - const char *str > > > - =3D per_objfile->read_line_string (buf, offset_size= ); > > > + if (line_str_data.empty ()) > > > + error (_("Dwarf Error: DW_FORM_line_strp used witho= ut " \ > > > + "required section")); > > > + if (line_str_data.size () <=3D offset_size) > > > + error (_("Dwarf Error: DW_FORM_line_strp pointing o= utside " \ > > > + "of section .debug_line")); > > > + > > > + ULONGEST str_offset =3D read_offset (parent_bfd, buf,= offset_size); > > > + > > > + const char *str; > > > + if (str_buf[str_offset] =3D=3D '\0') > > > + str =3D nullptr; > > > + else > > > + str =3D (const char *) (str_buf + str_offset); > > > string.emplace (str); > > > buf +=3D offset_size; > > > + break; > > > } > > > - break; > > > > > > case DW_FORM_data1: > > > - uint.emplace (read_1_byte (abfd, buf)); > > > + uint.emplace (read_1_byte (parent_bfd, buf)); > > > buf +=3D 1; > > > break; > > > > > > case DW_FORM_data2: > > > - uint.emplace (read_2_bytes (abfd, buf)); > > > + uint.emplace (read_2_bytes (parent_bfd, buf)); > > > buf +=3D 2; > > > break; > > > > > > case DW_FORM_data4: > > > - uint.emplace (read_4_bytes (abfd, buf)); > > > + uint.emplace (read_4_bytes (parent_bfd, buf)); > > > buf +=3D 4; > > > break; > > > > > > case DW_FORM_data8: > > > - uint.emplace (read_8_bytes (abfd, buf)); > > > + uint.emplace (read_8_bytes (parent_bfd, buf)); > > > buf +=3D 8; > > > break; > > > > > > @@ -205,7 +224,7 @@ read_formatted_entries (dwarf2_per_objfile *per_o= bjfile, bfd *abfd, > > > break; > > > > > > case DW_FORM_udata: > > > - uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_r= ead)); > > > + uint.emplace (read_unsigned_leb128 (parent_bfd, buf, &b= ytes_read)); > > > buf +=3D bytes_read; > > > break; > > > > > > @@ -248,28 +267,30 @@ read_formatted_entries (dwarf2_per_objfile *per= _objfile, bfd *abfd, > > > callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); > > > } > > > > > > - *bufp =3D buf; > > > + *line_bufp =3D buf; > > > } > > > > > > /* See line-header.h. */ > > > > > > line_header_up > > > -dwarf_decode_line_header (sect_offset sect_off, bool is_dwz, > > > - dwarf2_per_objfile *per_objfile, > > > - struct dwarf2_section_info *section, > > > - const struct comp_unit_head *cu_header, > > > - const char *comp_dir) > > > +dwarf_decode_line_header (bfd *parent_bfd, > > > + gdb::array_view line_data, > > > + gdb::array_view line_str_da= ta, > > > + const gdb_byte **debug_line_ptr, > > > + bool is_dwz, > > > + const struct comp_unit_head *cu_header, > > > + const char *comp_dir) > > > { > > > - const gdb_byte *line_ptr; > > > + const gdb_byte *line_ptr, *buf; > > > unsigned int bytes_read, offset_size; > > > int i; > > > const char *cur_dir, *cur_file; > > > > > > - bfd *abfd =3D section->get_bfd_owner (); > > > + buf =3D *debug_line_ptr; > > > > > > /* Make sure that at least there's room for the total_length field= . > > > That could be 12 bytes long, but we're just going to fudge that= . */ > > > - if (to_underlying (sect_off) + 4 >=3D section->size) > > > + if (buf + 4 >=3D line_data.data () + line_data.size ()) > > > { > > > dwarf2_statement_list_fits_in_line_number_section_complaint ()= ; > > > return 0; > > > @@ -277,62 +298,65 @@ dwarf_decode_line_header (sect_offset sect_off= , bool is_dwz, > > > > > > line_header_up lh (new line_header (comp_dir)); > > > > > > - lh->sect_off =3D sect_off; > > > + lh->sect_off =3D (sect_offset) (buf - line_data.data ()); > > > lh->offset_in_dwz =3D is_dwz; > > > > > > - line_ptr =3D section->buffer + to_underlying (sect_off); > > > + line_ptr =3D buf; > > > > > > /* Read in the header. */ > > > LONGEST unit_length > > > - =3D read_checked_initial_length_and_offset (abfd, line_ptr, cu_h= eader, > > > + =3D read_checked_initial_length_and_offset (parent_bfd, buf, cu_= header, > > > &bytes_read, &offset_si= ze); > > > - line_ptr +=3D bytes_read; > > > > > > - const gdb_byte *start_here =3D line_ptr; > > > + line_ptr +=3D bytes_read; > > > > > > - if (line_ptr + unit_length > (section->buffer + section->size)) > > > + if (line_ptr + unit_length > buf + line_data.size ()) > > > { > > > dwarf2_statement_list_fits_in_line_number_section_complaint ()= ; > > > return 0; > > > } > > > + > > > + const gdb_byte *start_here =3D line_ptr; > > > + > > > lh->statement_program_end =3D start_here + unit_length; > > > - lh->version =3D read_2_bytes (abfd, line_ptr); > > > + lh->version =3D read_2_bytes (parent_bfd, line_ptr); > > > line_ptr +=3D 2; > > > if (lh->version > 5) > > > { > > > /* This is a version we don't understand. The format could ha= ve > > > changed in ways we don't handle properly so just punt. */ > > > complaint (_("unsupported version in .debug_line section")); > > > - return NULL; > > > + return nullptr; > > > } > > > if (lh->version >=3D 5) > > > { > > > gdb_byte segment_selector_size; > > > > > > /* Skip address size. */ > > > - read_1_byte (abfd, line_ptr); > > > + read_1_byte (parent_bfd, line_ptr); > > > line_ptr +=3D 1; > > > > > > - segment_selector_size =3D read_1_byte (abfd, line_ptr); > > > + segment_selector_size =3D read_1_byte (parent_bfd, line_ptr); > > > line_ptr +=3D 1; > > > if (segment_selector_size !=3D 0) > > > { > > > complaint (_("unsupported segment selector size %u " > > > "in .debug_line section"), > > > segment_selector_size); > > > - return NULL; > > > + return nullptr; > > > } > > > } > > > > > > - LONGEST header_length =3D read_offset (abfd, line_ptr, offset_size= ); > > > + LONGEST header_length =3D read_offset (parent_bfd, line_ptr, offse= t_size); > > > line_ptr +=3D offset_size; > > > lh->statement_program_start =3D line_ptr + header_length; > > > - lh->minimum_instruction_length =3D read_1_byte (abfd, line_ptr); > > > + > > > + lh->minimum_instruction_length =3D read_1_byte (parent_bfd, line_p= tr); > > > line_ptr +=3D 1; > > > > > > if (lh->version >=3D 4) > > > { > > > - lh->maximum_ops_per_instruction =3D read_1_byte (abfd, line_pt= r); > > > + lh->maximum_ops_per_instruction =3D read_1_byte (parent_bfd, l= ine_ptr); > > > line_ptr +=3D 1; > > > } > > > else > > > @@ -345,41 +369,47 @@ dwarf_decode_line_header (sect_offset sect_off= , bool is_dwz, > > > "in `.debug_line' section")); > > > } > > > > > > - lh->default_is_stmt =3D read_1_byte (abfd, line_ptr); > > > + lh->default_is_stmt =3D read_1_byte (parent_bfd, line_ptr); > > > line_ptr +=3D 1; > > > - lh->line_base =3D read_1_signed_byte (abfd, line_ptr); > > > + > > > + lh->line_base =3D read_1_signed_byte (parent_bfd, line_ptr); > > > line_ptr +=3D 1; > > > - lh->line_range =3D read_1_byte (abfd, line_ptr); > > > + > > > + lh->line_range =3D read_1_byte (parent_bfd, line_ptr); > > > line_ptr +=3D 1; > > > - lh->opcode_base =3D read_1_byte (abfd, line_ptr); > > > + > > > + lh->opcode_base =3D read_1_byte (parent_bfd, line_ptr); > > > line_ptr +=3D 1; > > > + > > > lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_ba= se]); > > > > > > lh->standard_opcode_lengths[0] =3D 1; /* This should never be use= d anyway. */ > > > for (i =3D 1; i < lh->opcode_base; ++i) > > > { > > > - lh->standard_opcode_lengths[i] =3D read_1_byte (abfd, line_ptr= ); > > > + lh->standard_opcode_lengths[i] =3D read_1_byte (parent_bfd, li= ne_ptr); > > > line_ptr +=3D 1; > > > } > > > > > > if (lh->version >=3D 5) > > > { > > > /* Read directory table. */ > > > - read_formatted_entries (per_objfile, abfd, &line_ptr, lh.get (= ), > > > - offset_size, > > > - [] (struct line_header *header, const c= har *name, > > > - dir_index d_index, unsigned int mod= _time, > > > - unsigned int length) > > > + read_formatted_entries > > > + (parent_bfd, &line_ptr, line_str_data, > > > + lh.get (), offset_size, > > > + [] (struct line_header *header, const char *name, > > > + dir_index d_index, unsigned int mod_time, > > > + unsigned int length) > > > { > > > header->add_include_dir (name); > > > }); > > > > > > /* Read file name table. */ > > > - read_formatted_entries (per_objfile, abfd, &line_ptr, lh.get (= ), > > > - offset_size, > > > - [] (struct line_header *header, const c= har *name, > > > - dir_index d_index, unsigned int mod= _time, > > > - unsigned int length) > > > + read_formatted_entries > > > + (parent_bfd, &line_ptr, line_str_data, > > > + lh.get (), offset_size, > > > + [] (struct line_header *header, const char *name, > > > + dir_index d_index, unsigned int mod_time, > > > + unsigned int length) > > > { > > > header->add_file_name (name, d_index, mod_time, length); > > > }); > > > @@ -387,7 +417,7 @@ dwarf_decode_line_header (sect_offset sect_off, = bool is_dwz, > > > else > > > { > > > /* Read directory table. */ > > > - while ((cur_dir =3D read_direct_string (abfd, line_ptr, &bytes= _read)) !=3D NULL) > > > + while ((cur_dir =3D read_direct_string (parent_bfd, line_ptr, = &bytes_read)) !=3D nullptr) > > > { > > > line_ptr +=3D bytes_read; > > > lh->add_include_dir (cur_dir); > > > @@ -395,17 +425,17 @@ dwarf_decode_line_header (sect_offset sect_off= , bool is_dwz, > > > line_ptr +=3D bytes_read; > > > > > > /* Read file name table. */ > > > - while ((cur_file =3D read_direct_string (abfd, line_ptr, &byte= s_read)) !=3D NULL) > > > + while ((cur_file =3D read_direct_string (parent_bfd, line_ptr,= &bytes_read)) !=3D nullptr) > > > { > > > unsigned int mod_time, length; > > > dir_index d_index; > > > > > > line_ptr +=3D bytes_read; > > > - d_index =3D (dir_index) read_unsigned_leb128 (abfd, line_pt= r, &bytes_read); > > > + d_index =3D (dir_index) read_unsigned_leb128 (parent_bfd, l= ine_ptr, &bytes_read); > > > line_ptr +=3D bytes_read; > > > - mod_time =3D read_unsigned_leb128 (abfd, line_ptr, &bytes_r= ead); > > > + mod_time =3D read_unsigned_leb128 (parent_bfd, line_ptr, &b= ytes_read); > > > line_ptr +=3D bytes_read; > > > - length =3D read_unsigned_leb128 (abfd, line_ptr, &bytes_rea= d); > > > + length =3D read_unsigned_leb128 (parent_bfd, line_ptr, &byt= es_read); > > > line_ptr +=3D bytes_read; > > > > > > lh->add_file_name (cur_file, d_index, mod_time, length); > > > @@ -413,9 +443,40 @@ dwarf_decode_line_header (sect_offset sect_off,= bool is_dwz, > > > line_ptr +=3D bytes_read; > > > } > > > > > > - if (line_ptr > (section->buffer + section->size)) > > > + if (line_ptr > (buf + line_data.size ())) > > > complaint (_("line number info header doesn't " > > > "fit in `.debug_line' section")); > > > > > > + *debug_line_ptr +=3D unit_length + offset_size; > > > return lh; > > > } > > > + > > > +line_header_up > > > +dwarf_decode_line_header (sect_offset sect_off, bool is_dwz, > > > + dwarf2_per_objfile *per_objfile, > > > + struct dwarf2_section_info *section, > > > + const struct comp_unit_head *cu_header, > > > + const char *comp_dir) > > > +{ > > > + struct objfile *objfile =3D per_objfile->objfile; > > > + struct dwarf2_per_bfd *per_bfd =3D per_objfile->per_bfd; > > > + > > > + /* Read .debug_line. */ > > > + dwarf2_section_info *line_sec =3D &per_bfd->line; > > > + bfd_size_type line_size =3D line_sec->get_size (objfile); > > > + > > > + gdb::array_view line (line_sec->buffer, line_size)= ; > > > + > > > + /* Read .debug_line_str. */ > > > + dwarf2_section_info *line_str_sec =3D &per_bfd->line_str; > > > + bfd_size_type line_str_size =3D line_str_sec->get_size (objfile); > > > + > > > + gdb::array_view line_str (line_str_sec->buffer, > > > + line_str_size); > > > + > > > + const gdb_byte *line_ptr =3D line.data () + to_underlying (sect_of= f); > > > + > > > + return dwarf_decode_line_header > > > + (per_bfd->obfd, line, line_str, &line_ptr, > > > + is_dwz, cu_header, comp_dir); > > > +} > > > diff --git a/gdb/dwarf2/line-header.h b/gdb/dwarf2/line-header.h > > > index 06d2eec573b..22db9f9aa78 100644 > > > --- a/gdb/dwarf2/line-header.h > > > +++ b/gdb/dwarf2/line-header.h > > > @@ -217,4 +217,14 @@ extern line_header_up dwarf_decode_line_header > > > struct dwarf2_section_info *section, const struct comp_unit_head = *cu_header, > > > const char *comp_dir); > > > > > > +/* Like above but the .debug_line and .debug_line_str are stored in > > > + LINE_DATA and LINE_STR_DATA. *DEBUG_LINE_PTR should point to a > > > + statement program header within LINE_DATA. */ > > > + > > > +extern line_header_up dwarf_decode_line_header > > > + (bfd *parent_bfd, gdb::array_view line_data, > > > + gdb::array_view line_str_data, > > > + const gdb_byte **debug_line_ptr, bool is_dwz, > > > + const comp_unit_head *cu_header, const char *comp_dir); > > > + > > > #endif /* DWARF2_LINE_HEADER_H */ > > > diff --git a/gdb/dwarf2/read-gdb-index.c b/gdb/dwarf2/read-gdb-index.= c > > > index da88a8b405c..c0e51357ce2 100644 > > > --- a/gdb/dwarf2/read-gdb-index.c > > > +++ b/gdb/dwarf2/read-gdb-index.c > > > @@ -131,6 +131,9 @@ struct mapped_gdb_index final : public mapped_ind= ex_base > > > } > > > }; > > > > > > +struct mapped_debug_line; > > > +typedef std::unique_ptr mapped_debug_line_up; > > > + > > > struct dwarf2_gdb_index : public dwarf2_base_index_functions > > > { > > > /* This dumps minimal information about the index. > > > @@ -175,6 +178,15 @@ struct dwarf2_gdb_index : public dwarf2_base_ind= ex_functions > > > domain_enum domain, > > > enum search_domain kind); > > > > > > + /* If OBJFILE's debuginfo download has been deferred, use a mapped_= debug_line > > > + to generate filenames. > > > + > > > + Otherwise call dwarf2_base_index_functions::map_symbol_filenames= . */ > > > + > > > + void map_symbol_filenames (struct objfile *objfile, > > > + gdb::function_view fun, > > > + bool need_fullname) override; > > > + > > > /* Calls dwarf2_base_index_functions::expand_all_symtabs and downl= oads > > > debuginfo if necessary. */ > > > void expand_all_symtabs (struct objfile *objfile) override; > > > @@ -182,6 +194,15 @@ struct dwarf2_gdb_index : public dwarf2_base_ind= ex_functions > > > /* Calls dwarf2_base_index_functions::find_last_source_symtab and = downloads > > > debuginfo if necessary. */ > > > struct symtab *find_last_source_symtab (struct objfile *objfile) o= verride; > > > + > > > + /* Filename information related to this .gdb_index. */ > > > + mapped_debug_line_up mdl; > > > + > > > + /* Return true if any of the filenames in this .gdb_index's .debug= _line > > > + mapping match FILE_MATCHER. Initializes the mapping if necessa= ry. */ > > > + bool filename_in_debug_line > > > + (objfile *objfile, > > > + gdb::function_view file_matc= her); > > > }; > > > > > > void > > > @@ -217,6 +238,30 @@ dwarf2_gdb_index::find_last_source_symtab (struc= t objfile *objfile) > > > } > > > } > > > > > > +void > > > +dwarf2_gdb_index::map_symbol_filenames > > > + (struct objfile *objfile, > > > + gdb::function_view fun, > > > + bool need_fullname) > > > +{ > > > + try > > > + { > > > + dwarf2_base_index_functions::map_symbol_filenames (objfile, fu= n, > > > + need_fullnam= e); > > > + } > > > + catch (const gdb_exception &e) > > > + { > > > + if ((objfile->flags & OBJF_DOWNLOAD_DEFERRED) =3D=3D 0) > > > + exception_print (gdb_stderr, e); > > > + else > > > + { > > > + if (mdl =3D=3D nullptr) > > > + mdl.reset (new mapped_debug_line (objfile)); > > > + mdl->map_filenames (fun, need_fullname); > > > + } > > > + } > > > +} > > > + > > > /* This dumps minimal information about the index. > > > It is called via "mt print objfiles". > > > One use is to verify .gdb_index has been loaded by the > > > @@ -590,6 +635,17 @@ dwarf2_gdb_index::do_expand_symtabs_matching > > > return result; > > > } > > > > > > +bool > > > +dwarf2_gdb_index::filename_in_debug_line > > > + (objfile *objfile, > > > + gdb::function_view file_matche= r) > > > +{ > > > + if (mdl =3D=3D nullptr) > > > + mdl.reset (new mapped_debug_line (objfile)); > > > + > > > + return mdl->contains_matching_filename (file_matcher); > > > +} > > > + > > > bool > > > dwarf2_gdb_index::expand_symtabs_matching > > > (struct objfile *objfile, > > > @@ -618,6 +674,10 @@ dwarf2_gdb_index::expand_symtabs_matching > > > return false; > > > } > > > > > > + if (file_matcher !=3D nullptr > > > + && !filename_in_debug_line (objfile, file_matcher)) > > > + return true; > > > + > > > read_full_dwarf_from_debuginfod (objfile, this); > > > return true; > > > } > > > diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c > > > index 0c5689c63ef..876e3aedcf1 100644 > > > --- a/gdb/dwarf2/read.c > > > +++ b/gdb/dwarf2/read.c > > > @@ -81,6 +81,7 @@ > > > #include "gdbsupport/gdb_optional.h" > > > #include "gdbsupport/underlying.h" > > > #include "gdbsupport/hash_enum.h" > > > +#include "gdbsupport/scoped_mmap.h" > > > #include "filename-seen-cache.h" > > > #include "producer.h" > > > #include > > > @@ -2135,6 +2136,213 @@ dw2_get_file_names (dwarf2_per_cu_data *this_= cu, > > > return this_cu->file_names; > > > } > > > > > > +#if !HAVE_SYS_MMAN_H > > > + > > > +bool > > > +mapped_debug_line::contains_matching_filename > > > + (gdb::function_view file_matche= r) > > > +{ > > > + return false; > > > +} > > > + > > > +gdb::array_view > > > +mapped_debug_line::read_debug_line_separate > > > + (char *filename, std::unique_ptr *resource) > > > +{ > > > + return {}; > > > +} > > > + > > > +bool > > > +mapped_debug_line::read_debug_line_from_debuginfod (objfile *objfile= ) > > > +{ > > > + return false; > > > +} > > > + > > > +void > > > +mapped_debug_line::map_filenames > > > + (gdb::function_view fun, > > > + bool need_fullname) > > > +{ > > > + return; > > > +} > > > + > > > +#else /* !HAVE_SYS_MMAN_H */ > > > + > > > +struct line_resource_mmap final : public index_cache_resource > > > +{ > > > + /* Try to mmap FILENAME. Throw an exception on failure, including= if the > > > + file doesn't exist. */ > > > + line_resource_mmap (const char *filename) > > > + : mapping (mmap_file (filename)) > > > + {} > > > + > > > + scoped_mmap mapping; > > > +}; > > > + > > > +/* See read.h. */ > > > + > > > +bool > > > +mapped_debug_line::contains_matching_filename > > > + (gdb::function_view file_matche= r) > > > +{ > > > + for (line_header_up &lh : line_headers) > > > + for (file_entry &fe : lh->file_names ()) > > > + { > > > + const char *filename =3D fe.name; > > > + > > > + if (file_matcher (fe.name, false)) > > > + return true; > > > + > > > + bool basename_match =3D file_matcher (lbasename (fe.name), tr= ue); > > > + > > > + if (!basenames_may_differ && !basename_match) > > > + continue; > > > + > > > + /* DW_AT_comp_dir is not explicitly mentioned in the .debug_l= ine > > > + until DWARF5. Since we don't have access to the CU at thi= s > > > + point we just check for a partial match on the filename. > > > + If there is a match, the full debuginfo will be downloaded > > > + ane the match will be re-evalute with DW_AT_comp_dir. */ > > > + if (lh->version < 5 && fe.d_index =3D=3D 0) > > > + return basename_match; > > > + > > > + const char *dirname =3D fe.include_dir (&*lh); > > > + std::string fullname; > > > + > > > + if (dirname =3D=3D nullptr || IS_ABSOLUTE_PATH (filename)) > > > + fullname =3D filename; > > > + else > > > + fullname =3D std::string (dirname) + SLASH_STRING + filenam= e; > > > + > > > + gdb::unique_xmalloc_ptr rewritten > > > + =3D rewrite_source_path (fullname.c_str ()); > > > + if (rewritten !=3D nullptr) > > > + fullname =3D rewritten.release (); > > > + > > > + if (file_matcher (fullname.c_str (), false)) > > > + return true; > > > + } > > > + > > > + return false; > > > +} > > > + > > > +/* See read.h. */ > > > + > > > +void > > > +mapped_debug_line::map_filenames > > > + (gdb::function_view fun, > > > + bool need_fullname) > > > +{ > > > + for (line_header_up &lh : line_headers) > > > + for (file_entry &fe : lh->file_names ()) > > > + { > > > + const char *filename =3D fe.name; > > > + > > > + if (!need_fullname) > > > + { > > > + fun (filename, nullptr); > > > + continue; > > > + } > > > + > > > + const char *dirname =3D fe.include_dir (&*lh); > > > + std::string fullname; > > > + > > > + if (dirname =3D=3D nullptr || IS_ABSOLUTE_PATH (filename)) > > > + fullname =3D filename; > > > + else > > > + fullname =3D std::string (dirname) + SLASH_STRING + filenam= e; > > > + > > > + gdb::unique_xmalloc_ptr rewritten > > > + =3D rewrite_source_path (fullname.c_str ()); > > > + if (rewritten !=3D nullptr) > > > + fullname =3D rewritten.release (); > > > + > > > + fun (filename, fullname.c_str ()); > > > + } > > > +} > > > + > > > +/* See read.h. */ > > > + > > > +gdb::array_view > > > +mapped_debug_line::read_debug_line_separate > > > + (char *filename, std::unique_ptr *resource) > > > +{ > > > + if (filename =3D=3D nullptr) > > > + return {}; > > > + > > > + try > > > + { > > > + line_resource_mmap *mmap_resource > > > + =3D new line_resource_mmap (filename); > > > + > > > + resource->reset (mmap_resource); > > > + > > > + return gdb::array_view > > > + ((const gdb_byte *) mmap_resource->mapping.get (), > > > + mmap_resource->mapping.size ()); > > > + } > > > + catch (const gdb_exception &except) > > > + { > > > + exception_print (gdb_stderr, except); > > > + } > > > + > > > + return {}; > > > +} > > > + > > > +/* See read.h. */ > > > + > > > +bool > > > +mapped_debug_line::read_debug_line_from_debuginfod (objfile *objfile= ) > > > +{ > > > + const bfd_build_id *build_id =3D build_id_bfd_get (objfile->obfd.g= et ()); > > > + if (build_id =3D=3D nullptr) > > > + return false; > > > + > > > + gdb::unique_xmalloc_ptr line_path; > > > + scoped_fd line_fd =3D debuginfod_section_query (build_id->data, > > > + build_id->size, > > > + bfd_get_filename > > > + (objfile->obfd.get = ()), > > > + ".debug_line", > > > + &line_path); > > > + > > > + if (line_fd.get () < 0) > > > + return false; > > > + > > > + gdb::unique_xmalloc_ptr line_str_path; > > > + scoped_fd line_str_fd =3D debuginfod_section_query (build_id->data= , > > > + build_id->size, > > > + bfd_get_filename > > > + (objfile->obfd.= get ()), > > > + ".debug_line_str"= , > > > + &line_str_path); > > > + > > > + line_data =3D read_debug_line_separate (line_path.get (), &line_re= source); > > > + line_str_data =3D read_debug_line_separate (line_str_path.get (), > > > + &line_str_resource); > > > + > > > + const gdb_byte *line_ptr =3D line_data.data (); > > > + > > > + while (line_ptr < line_data.data () + line_data.size ()) > > > + { > > > + line_header_up lh > > > + =3D dwarf_decode_line_header (objfile->obfd.get (), > > > + line_data, line_str_data, > > > + &line_ptr, false, > > > + nullptr, nullptr); > > > + line_headers.emplace_back (lh.release ()); > > > + } > > > + > > > + return true; > > > +} > > > +#endif /* !HAVE_SYS_MMAN_H */ > > > + > > > +mapped_debug_line::mapped_debug_line (objfile *objfile) > > > +{ > > > + if (!read_debug_line_from_debuginfod (objfile)) > > > + line_headers.clear (); > > > +} > > > + > > > /* A helper for the "quick" functions which computes and caches the > > > real path for a given file name from the line table. */ > > > > > > diff --git a/gdb/dwarf2/read.h b/gdb/dwarf2/read.h > > > index 6ed0be7203b..49fea22c092 100644 > > > --- a/gdb/dwarf2/read.h > > > +++ b/gdb/dwarf2/read.h > > > @@ -33,6 +33,7 @@ > > > #include "gdbsupport/hash_enum.h" > > > #include "gdbsupport/function-view.h" > > > #include "gdbsupport/packed.h" > > > +#include "dwarf2/line-header.h" > > > > > > /* Hold 'maintenance (set|show) dwarf' commands. */ > > > extern struct cmd_list_element *set_dwarf_cmdlist; > > > @@ -969,4 +970,40 @@ extern bool read_addrmap_from_aranges (dwarf2_pe= r_objfile *per_objfile, > > > extern void read_full_dwarf_from_debuginfod (struct objfile *, > > > dwarf2_base_index_functi= ons *); > > > > > > +struct mapped_debug_line > > > +{ > > > + mapped_debug_line (objfile *objfile); > > > + > > > + /* Return true if any of the mapped .debug_line's filenames match > > > + FILE_MATCHER. */ > > > + > > > + bool contains_matching_filename > > > + (gdb::function_view file_matc= her); > > > + > > > + /* Call FUN with each filename in this mapped .debug_line. Includ= e > > > + each file's fullname if NEED_FULLNAME is true. */ > > > + > > > + void map_filenames (gdb::function_view fun, > > > + bool need_fullname); > > > + > > > +private: > > > + std::vector line_headers; > > > + > > > + gdb::array_view line_data; > > > + gdb::array_view line_str_data; > > > + > > > + std::unique_ptr line_resource; > > > + std::unique_ptr line_str_resource; > > > + > > > + /* Download the .debug_line and .debug_line_str associated with OB= JFILE > > > + and populate line_headers. */ > > > + > > > + bool read_debug_line_from_debuginfod (objfile *objfile); > > > + > > > + /* Initialize line_data and line_str_data with the .debug_line and > > > + .debug_line_str downloaded read_debug_line_from_debuginfod. */ > > > + > > > + gdb::array_view read_debug_line_separate > > > + (char *filename, std::unique_ptr *resource= ); > > > +}; > > > #endif /* DWARF2READ_H */ > > > diff --git a/gdb/mi/mi-out.c b/gdb/mi/mi-out.c > > > index bbd21287b28..110864adac3 100644 > > > --- a/gdb/mi/mi-out.c > > > +++ b/gdb/mi/mi-out.c > > > @@ -278,7 +278,14 @@ mi_ui_out::do_progress_notify (const std::string= &msg, const char *unit, > > > > > > if (info.state =3D=3D progress_update::START) > > > { > > > - gdb_printf ("%s...\n", msg.c_str ()); > > > + std::string prefix; > > > + if (cur_prefix_state =3D=3D prefix_state_t::NEWLINE_NEEDED) > > > + { > > > + prefix =3D "\n"; > > > + cur_prefix_state =3D prefix_state_t::NEWLINE_PRINTED; > > > + } > > > + > > > + gdb_printf ("%s...\n", (prefix + msg).c_str ()); > > > info.state =3D progress_update::WORKING; > > > } > > > } > > > diff --git a/gdb/testsuite/gdb.debuginfod/section.exp b/gdb/testsuite= /gdb.debuginfod/section.exp > > > index ff57c6e32b7..b5c6929fcf7 100644 > > > --- a/gdb/testsuite/gdb.debuginfod/section.exp > > > +++ b/gdb/testsuite/gdb.debuginfod/section.exp > > > @@ -171,6 +171,27 @@ proc_with_prefix local_url { } { > > > # during backtrace. > > > set res ".*debug info for $lib_sl1\.\.\.\r\n\#1.*" > > > gdb_test "bt" $res "break backtrace" > > > + > > > + clean_restart_with_prompt $sectexec "" "line 1" > > > + > > > + # List source file using .debug_line download. > > > + set res ".*\.debug_line.*$lib_sl1.*21.*extern void libsection2_t= est.*" > > > + gdb_test "list $libsrc1:21" $res "line 1 list" > > > + > > > + clean_restart_with_prompt $sectexec "" "line 2" > > > + > > > + # Set breakpoint using .debug_line download. > > > + set res ".*section \.debug_line for $lib_sl1.*Breakpoint 2 at.*$= libsrc1.*" > > > + gdb_test "br $libsrc1:37" $res "line 2 br" > > > + > > > + # Continue to breakpoint. > > > + set res "Breakpoint 2, libsection1_test.*\"Cancelling thread\\\\= n\".*" > > > + gdb_test "c" $res "line 2 continue" > > > + > > > + # Check that download progress message is correctly formatted > > > + # when printing threads. > > > + set res ".*separate debug info for $lib_sl2\.\.\.\r\n.* 2 Thr= ead.*" > > > + gdb_test "info thr" $res "line thread" > > > } > > > > > > # Create CACHE and DB directories ready for debuginfod to use. > > > diff --git a/gdb/ui-out.c b/gdb/ui-out.c > > > index 9f643b1ce95..fde46bfbe94 100644 > > > --- a/gdb/ui-out.c > > > +++ b/gdb/ui-out.c > > > @@ -32,6 +32,9 @@ > > > #include > > > #include > > > > > > +/* Current state of newline prefixing for progress update messages. = */ > > > +prefix_state_t cur_prefix_state =3D prefix_state_t::NEWLINE_OFF; > > > + > > > namespace { > > > > > > /* A header of a ui_out_table. */ > > > diff --git a/gdb/ui-out.h b/gdb/ui-out.h > > > index 70a7145741f..7de8796aee0 100644 > > > --- a/gdb/ui-out.h > > > +++ b/gdb/ui-out.h > > > @@ -296,6 +296,21 @@ class ui_out > > > BAR > > > }; > > > > > > + /* Used to communicate the status of a newline prefix for the ne= xt progress > > > + update message. */ > > > + enum prefix_state > > > + { > > > + /* Do not modify the next progress update message. */ > > > + NEWLINE_OFF, > > > + > > > + /* The next progress update message should include a newline p= refix. */ > > > + NEWLINE_NEEDED, > > > + > > > + /* A newline prefix was included in a debuginfod progress upda= te > > > + message. */ > > > + NEWLINE_PRINTED > > > + }; > > > + > > > /* SHOULD_PRINT indicates whether something should be printed fo= r a tty. */ > > > progress_update () > > > { > > > @@ -393,6 +408,11 @@ class ui_out > > > ui_out_level *current_level () const; > > > }; > > > > > > +typedef ui_out::progress_update::prefix_state prefix_state_t; > > > + > > > +/* Current state of the newline prefix. */ > > > +extern prefix_state_t cur_prefix_state; > > > + > > > /* Start a new tuple or list on construction, and end it on > > > destruction. Normally this is used via the typedefs > > > ui_out_emit_tuple and ui_out_emit_list. */ > > > -- > > > 2.41.0 > > >