<div dir="ltr">Clang r218129:<div><br></div><div><div>$ ./bin/clang -gline-tables-only a.c -o a.out -###</div><div>clang version 3.6.0 (218129)</div><div>Target: x86_64-apple-darwin14.0.0</div><div>Thread model: posix</div><div> "/Users/kuba/llvm-tot-cmake-release/bin/clang-3.6" "-cc1" "-triple" "x86_64-apple-macosx10.10.0" "-emit-obj" "-mrelax-all" "-disable-free" "-main-file-name" "a.c" "-mrelocation-model" "pic" "-pic-level" "2" "-mdisable-fp-elim" "-masm-verbose" "-munwind-tables" "-target-cpu" "core2" "-gline-tables-only" "-gdwarf-2" "-dwarf-column-info" "-resource-dir" "/Users/kuba/llvm-tot-cmake-release/bin/../lib/clang/3.6.0" "-fdebug-compilation-dir" "/Users/kuba/llvm-tot-cmake-release" "-ferror-limit" "19" "-fmessage-length" "364" "-stack-protector" "1" "-mstackrealign" "-fblocks" "-fobjc-runtime=macosx-10.10.0" "-fencode-extended-block-signature" "-fmax-type-align=16" "-fdiagnostics-show-option" "-fcolor-diagnostics" "-o" "/var/folders/k0/qjt5nwj91314gwrg0j9ltrrw0000gn/T/a-87344c.o" "-x" "c" "a.c"</div><div> "/usr/bin/ld" "-dynamic" "-arch" "x86_64" "-macosx_version_min" "10.10.0" "-o" "a.out" "/var/folders/k0/qjt5nwj91314gwrg0j9ltrrw0000gn/T/a-87344c.o" "-lSystem"</div><div> "/usr/bin/dsymutil" "-o" "a.out.dSYM" "a.out"</div><div>$ ./bin/clang -cc1 -triple x86_64-apple-macosx10.10.0 -emit-obj -gline-tables-only -gdwarf-2 -dwarf-column-info a.c -o a.o</div><div>$ ld -dynamic -arch x86_64 -o a.out a.o -lSystem -macosx_version_min 10.10.0</div><div>$ dsymutil a.out -o a.out.dSYM</div><div>warning: no debug symbols in executable (-arch x86_64)</div><div>$ ./bin/llvm-dwarfdump -debug-dump=all a.out.dSYM/Contents/Resources/DWARF/a.out</div><div>a.out.dSYM/Contents/Resources/DWARF/a.out:<span class="" style="white-space:pre"> </span>file format Mach-O 64-bit x86-64</div><div>.debug_abbrev contents:</div><div>Abbrev table for offset: 0x00000000</div><div>.debug_abbrev.dwo contents:</div><div>< EMPTY ></div><div>.debug_info contents:</div><div>.debug_loc contents:</div><div>.debug_loc.dwo contents:</div><div>.debug_frame contents:</div><div>.debug_aranges contents:</div><div>.debug_line contents:</div><div>.debug_line.dwo contents:</div><div>.debug_str contents:</div><div>0x00000000: ""</div><div>.debug_ranges contents:</div><div>.debug_pubnames contents:</div><div>.debug_pubtypes contents:</div><div>.debug_gnu_pubnames contents:</div><div>.debug_gnu_pubtypes contents:</div><div>$ </div></div><div><br></div><div>Clang r218128:</div><div><br></div><div><div>$ ./bin/clang -gline-tables-only a.c -o a.out -###</div><div>clang version 3.6.0 (218128)</div><div>Target: x86_64-apple-darwin14.0.0</div><div>Thread model: posix</div><div> "/Users/kuba/llvm-tot-cmake-release/bin/clang-3.6" "-cc1" "-triple" "x86_64-apple-macosx10.10.0" "-emit-obj" "-mrelax-all" "-disable-free" "-main-file-name" "a.c" "-mrelocation-model" "pic" "-pic-level" "2" "-mdisable-fp-elim" "-masm-verbose" "-munwind-tables" "-target-cpu" "core2" "-gline-tables-only" "-gdwarf-2" "-dwarf-column-info" "-resource-dir" "/Users/kuba/llvm-tot-cmake-release/bin/../lib/clang/3.6.0" "-fdebug-compilation-dir" "/Users/kuba/llvm-tot-cmake-release" "-ferror-limit" "19" "-fmessage-length" "364" "-stack-protector" "1" "-mstackrealign" "-fblocks" "-fobjc-runtime=macosx-10.10.0" "-fencode-extended-block-signature" "-fmax-type-align=16" "-fdiagnostics-show-option" "-fcolor-diagnostics" "-o" "/var/folders/k0/qjt5nwj91314gwrg0j9ltrrw0000gn/T/a-d4d93b.o" "-x" "c" "a.c"</div><div> "/usr/bin/ld" "-dynamic" "-arch" "x86_64" "-macosx_version_min" "10.10.0" "-o" "a.out" "/var/folders/k0/qjt5nwj91314gwrg0j9ltrrw0000gn/T/a-d4d93b.o" "-lSystem"</div><div> "/usr/bin/dsymutil" "-o" "a.out.dSYM" "a.out"</div><div>$ ./bin/clang -cc1 -triple x86_64-apple-macosx10.10.0 -emit-obj -gline-tables-only -gdwarf-2 -dwarf-column-info a.c -o a.o</div><div>$ ld -dynamic -arch x86_64 -o a.out a.o -lSystem -macosx_version_min 10.10.0</div><div>$ dsymutil a.out -o a.out.dSYM</div><div>$ ./bin/llvm-dwarfdump -debug-dump=all a.out.dSYM/Contents/Resources/DWARF/a.out</div><div>a.out.dSYM/Contents/Resources/DWARF/a.out:<span class="" style="white-space:pre"> </span>file format Mach-O 64-bit x86-64</div><div><br></div><div>.debug_abbrev contents:</div><div>Abbrev table for offset: 0x00000000</div><div>[1] DW_TAG_compile_unit<span class="" style="white-space:pre"> </span>DW_CHILDREN_yes</div><div><span class="" style="white-space:pre"> </span>DW_AT_producer<span class="" style="white-space:pre"> </span>DW_FORM_strp</div><div><span class="" style="white-space:pre"> </span>DW_AT_language<span class="" style="white-space:pre"> </span>DW_FORM_data2</div><div><span class="" style="white-space:pre"> </span>DW_AT_name<span class="" style="white-space:pre"> </span>DW_FORM_strp</div><div><span class="" style="white-space:pre"> </span>DW_AT_stmt_list<span class="" style="white-space:pre"> </span>DW_FORM_data4</div><div><span class="" style="white-space:pre"> </span>DW_AT_comp_dir<span class="" style="white-space:pre"> </span>DW_FORM_strp</div><div><br></div><div>[2] DW_TAG_subprogram<span class="" style="white-space:pre"> </span>DW_CHILDREN_no</div><div><span class="" style="white-space:pre"> </span>DW_AT_low_pc<span class="" style="white-space:pre"> </span>DW_FORM_addr</div><div><span class="" style="white-space:pre"> </span>DW_AT_high_pc<span class="" style="white-space:pre"> </span>DW_FORM_addr</div><div><span class="" style="white-space:pre"> </span>DW_AT_APPLE_omit_frame_ptr<span class="" style="white-space:pre"> </span>DW_FORM_flag</div><div><span class="" style="white-space:pre"> </span>DW_AT_name<span class="" style="white-space:pre"> </span>DW_FORM_strp</div><div><br></div><div><br></div><div>.debug_abbrev.dwo contents:</div><div>< EMPTY ></div><div><br></div><div>.debug_info contents:</div><div>0x00000000: Compile Unit: length = 0x00000047 version = 0x0002 abbr_offset = 0x0000 addr_size = 0x08 (next unit at 0x0000004b)</div><div><br></div><div>0x0000000b: DW_TAG_compile_unit [1] *</div><div> DW_AT_producer [DW_FORM_strp]<span class="" style="white-space:pre"> </span>( .debug_str[0x00000001] = "clang version 3.6.0 (218128)")</div><div> DW_AT_language [DW_FORM_data2]<span class="" style="white-space:pre"> </span>(DW_LANG_C99)</div><div> DW_AT_name [DW_FORM_strp]<span class="" style="white-space:pre"> </span>( .debug_str[0x0000001e] = "<stdin>")</div><div> DW_AT_stmt_list [DW_FORM_data4]<span class="" style="white-space:pre"> </span>(0x00000000)</div><div> DW_AT_comp_dir [DW_FORM_strp]<span class="" style="white-space:pre"> </span>( .debug_str[0x00000026] = "/Users/kuba/llvm-tot-cmake-release")</div><div><br></div><div>0x0000001e: DW_TAG_subprogram [2] </div><div> DW_AT_low_pc [DW_FORM_addr]<span class="" style="white-space:pre"> </span>(0x0000000100000f20)</div><div> DW_AT_high_pc [DW_FORM_addr]<span class="" style="white-space:pre"> </span>(0x0000000100000f39)</div><div> DW_AT_APPLE_omit_frame_ptr [DW_FORM_flag]<span class="" style="white-space:pre"> </span>(0x01)</div><div> DW_AT_name [DW_FORM_strp]<span class="" style="white-space:pre"> </span>( .debug_str[0x00000049] = "f")</div><div><br></div><div>0x00000034: DW_TAG_subprogram [2] </div><div> DW_AT_low_pc [DW_FORM_addr]<span class="" style="white-space:pre"> </span>(0x0000000100000f40)</div><div> DW_AT_high_pc [DW_FORM_addr]<span class="" style="white-space:pre"> </span>(0x0000000100000f83)</div><div> DW_AT_APPLE_omit_frame_ptr [DW_FORM_flag]<span class="" style="white-space:pre"> </span>(0x01)</div><div> DW_AT_name [DW_FORM_strp]<span class="" style="white-space:pre"> </span>( .debug_str[0x0000004b] = "main")</div><div><br></div><div>0x0000004a: NULL</div><div><br></div><div>.debug_loc contents:</div><div><br></div><div>.debug_loc.dwo contents:</div><div><br></div><div>.debug_frame contents:</div><div><br></div><div>00000000 00000014 ffffffff CIE</div><div> Version: 1</div><div> Augmentation: ""</div><div> Code alignment factor: 1</div><div> Data alignment factor: -8</div><div> Return address column: 16</div><div><br></div><div> DW_CFA_def_cfa:</div><div> DW_CFA_offset:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div><br></div><div>00000018 0000001c 00000000 FDE cie=00000000 pc=00000f20...00000f39</div><div> DW_CFA_advance_loc:</div><div> DW_CFA_def_cfa_offset:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div><br></div><div>00000038 0000001c 00000000 FDE cie=00000000 pc=00000f40...00000f83</div><div> DW_CFA_advance_loc:</div><div> DW_CFA_def_cfa_offset:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div> DW_CFA_nop:</div><div><br></div><div><br></div><div>.debug_aranges contents:</div><div>Address Range Header: length = 0x0000003c, version = 0x0002, cu_offset = 0x00000000, addr_size = 0x08, seg_size = 0x00</div><div>[0x0000000100000f20 - 0x0000000100000f39)</div><div>[0x0000000100000f40 - 0x0000000100000f83)</div><div><br></div><div>.debug_line contents:</div><div>Line table prologue:</div><div> total_length: 0x00000052</div><div> version: 2</div><div> prologue_length: 0x0000001a</div><div> min_inst_length: 1</div><div> default_is_stmt: 1</div><div> line_base: -5</div><div> line_range: 14</div><div> opcode_base: 13</div><div>standard_opcode_lengths[DW_LNS_copy] = 0</div><div>standard_opcode_lengths[DW_LNS_advance_pc] = 1</div><div>standard_opcode_lengths[DW_LNS_advance_line] = 1</div><div>standard_opcode_lengths[DW_LNS_set_file] = 1</div><div>standard_opcode_lengths[DW_LNS_set_column] = 1</div><div>standard_opcode_lengths[DW_LNS_negate_stmt] = 0</div><div>standard_opcode_lengths[DW_LNS_set_basic_block] = 0</div><div>standard_opcode_lengths[DW_LNS_const_add_pc] = 0</div><div>standard_opcode_lengths[DW_LNS_fixed_advance_pc] = 1</div><div>standard_opcode_lengths[DW_LNS_set_prologue_end] = 0</div><div>standard_opcode_lengths[DW_LNS_set_epilogue_begin] = 0</div><div>standard_opcode_lengths[DW_LNS_set_isa] = 1</div><div> Dir Mod Time File Len File Name</div><div> ---- ---------- ---------- ---------------------------</div><div>file_names[ 1] 0 0x00000000 0x00000000 a.c</div><div><br></div><div>Address Line Column File ISA Discriminator Flags</div><div>------------------ ------ ------ ------ --- ------------- -------------</div><div>0x0000000100000f20 3 0 1 0 0 is_stmt</div><div>0x0000000100000f28 4 2 1 0 0 is_stmt prologue_end</div><div>0x0000000100000f31 5 2 1 0 0 is_stmt</div><div>0x0000000100000f39 5 2 1 0 0 is_stmt end_sequence</div><div>0x0000000100000f40 8 0 1 0 0 is_stmt</div><div>0x0000000100000f4b 9 2 1 0 0 is_stmt prologue_end</div><div>0x0000000100000f59 10 2 1 0 0 is_stmt</div><div>0x0000000100000f6b 11 2 1 0 0 is_stmt</div><div>0x0000000100000f78 12 1 1 0 0 is_stmt</div><div>0x0000000100000f83 12 1 1 0 0 is_stmt end_sequence</div><div><br></div><div>.debug_line.dwo contents:</div><div><br></div><div>.debug_str contents:</div><div>0x00000000: ""</div><div>0x00000001: "clang version 3.6.0 (218128)"</div><div>0x0000001e: "<stdin>"</div><div>0x00000026: "/Users/kuba/llvm-tot-cmake-release"</div><div>0x00000049: "f"</div><div>0x0000004b: "main"</div><div><br></div><div>.debug_ranges contents:</div><div><br></div><div>.debug_pubnames contents:</div><div>length = 0x0000001d version = 0x0002 unit_offset = 0x00000000 unit_size = 0x0000004b</div><div>Offset Name</div><div>0x0000001e "f"</div><div>0x00000034 "main"</div><div><br></div><div>.debug_pubtypes contents:</div><div><br></div><div>.debug_gnu_pubnames contents:</div><div><br></div><div>.debug_gnu_pubtypes contents:</div><div>$ </div></div><div><br></div><div><br></div><div><br></div><div>Kuba</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Sep 25, 2014 at 10:51 AM, David Blaikie <span dir="ltr"><<a href="mailto:dblaikie@gmail.com" target="_blank">dblaikie@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><span class="">On Wed, Sep 24, 2014 at 12:27 PM, Kuba Brecka <span dir="ltr"><<a href="mailto:kuba.brecka@gmail.com" target="_blank">kuba.brecka@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Sure. It works with my system's clang, but when using my just-built ./bin/clang, the symbolizer doesn't give me any line information.<div><br></div><div><div>$ cat a.c</div><div>#include <stdio.h></div><div><br></div><div>int f() {</div><div> printf("X");</div><div> return 0;</div><div>}</div><div><br></div><div>int main() {</div><div> printf("1");</div><div> printf("2");</div><div> printf("3");</div><div>}</div><div>$ clang a.c -o a.out -gline-tables-only</div></div></div></blockquote><div><br></div></span><div>A -cc1 command line would be helpful, not sure which -target I should use, etc.</div><span class=""><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>$ nm a.out</div><div>0000000100000000 T __mh_execute_header</div><div>0000000100000f00 T _f</div><div>0000000100000f30 T _main</div><div> U _printf</div><div> U dyld_stub_binder</div><div>$ echo "a.out 0x0000000100000f00" | ./bin/llvm-symbolizer </div><div>f</div><div>/Users/kuba/llvm-tot-cmake-release/a.c:3:0</div><div>$ echo "a.out 0x0000000100000f18" | ./bin/llvm-symbolizer </div><div>f</div><div>/Users/kuba/llvm-tot-cmake-release/a.c:5:2</div><div>$ ./bin/llvm-dwarfdump -debug-dump=line a.out.dSYM/Contents/Resources/DWARF/a.out</div></div></div></blockquote><div><br></div></span><div>The full dwarfdump, not just the line table, is probably necessary to investigate this - my change didn't modify the line table, it modified the compile units in the debug_info section (and added ranges back into the debug_ranges section).</div><div><div class="h5"><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>a.out.dSYM/Contents/Resources/DWARF/a.out: file format Mach-O 64-bit x86-64</div><div>.debug_line contents:</div><div>Line table prologue:</div><div> total_length: 0x00000052</div><div> version: 2</div><div> prologue_length: 0x0000001a</div><div> min_inst_length: 1</div><div> default_is_stmt: 1</div><div> line_base: -5</div><div> line_range: 14</div><div> opcode_base: 13</div><div>standard_opcode_lengths[DW_LNS_copy] = 0</div><div>standard_opcode_lengths[DW_LNS_advance_pc] = 1</div><div>standard_opcode_lengths[DW_LNS_advance_line] = 1</div><div>standard_opcode_lengths[DW_LNS_set_file] = 1</div><div>standard_opcode_lengths[DW_LNS_set_column] = 1</div><div>standard_opcode_lengths[DW_LNS_negate_stmt] = 0</div><div>standard_opcode_lengths[DW_LNS_set_basic_block] = 0</div><div>standard_opcode_lengths[DW_LNS_const_add_pc] = 0</div><div>standard_opcode_lengths[DW_LNS_fixed_advance_pc] = 1</div><div>standard_opcode_lengths[DW_LNS_set_prologue_end] = 0</div><div>standard_opcode_lengths[DW_LNS_set_epilogue_begin] = 0</div><div>standard_opcode_lengths[DW_LNS_set_isa] = 1</div><div> Dir Mod Time File Len File Name</div><div> ---- ---------- ---------- ---------------------------</div><div>file_names[ 1] 0 0x00000000 0x00000000 a.c</div><div>Address Line Column File ISA Discriminator Flags</div><div>------------------ ------ ------ ------ --- ------------- -------------</div><div>0x0000000100000f00 3 0 1 0 0 is_stmt</div><div>0x0000000100000f0f 4 2 1 0 0 is_stmt prologue_end</div><div>0x0000000100000f18 5 2 1 0 0 is_stmt</div><div>0x0000000100000f23 5 2 1 0 0 is_stmt end_sequence</div><div>0x0000000100000f30 8 0 1 0 0 is_stmt</div><div>0x0000000100000f3f 9 2 1 0 0 is_stmt prologue_end</div><div>0x0000000100000f4d 10 2 1 0 0 is_stmt</div><div>0x0000000100000f5e 11 2 1 0 0 is_stmt</div><div>0x0000000100000f6a 12 1 1 0 0 is_stmt</div><div>0x0000000100000f75 12 1 1 0 0 is_stmt end_sequence</div><div><br></div><div>$ ./bin/clang a.c -o a.out -gline-tables-only</div><div>warning: no debug symbols in executable (-arch x86_64)</div><div>$ echo "a.out 0x0000000100000f00" | ./bin/llvm-symbolizer </div><div>f</div><div>??:0:0</div><div>$ echo "a.out 0x0000000100000f18" | ./bin/llvm-symbolizer </div><div>f</div><div>??:0:0</div><div>$ ./bin/llvm-dwarfdump -debug-dump=line a.out.dSYM/Contents/Resources/DWARF/a.out</div><div>a.out.dSYM/Contents/Resources/DWARF/a.out: file format Mach-O 64-bit x86-64</div><div><br></div><div><br></div><div>.debug_line contents:</div><div>$</div></div><span><font color="#888888"><div><br></div><div>Kuba</div><div><br></div></font></span></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Sep 24, 2014 at 12:10 PM, David Blaikie <span dir="ltr"><<a href="mailto:dblaikie@gmail.com" target="_blank">dblaikie@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><span>On Wed, Sep 24, 2014 at 12:08 PM, Kuba Brecka <span dir="ltr"><<a href="mailto:kuba.brecka@gmail.com" target="_blank">kuba.brecka@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>I'm getting test failures for compiler-rt asan tests after this patch. It seems the symbolizer stops working with -gline-tables-only on OS X:</div></div></blockquote></span><div><br>Could you provide a simple reproduction? (a clang command line with a -target and an llvm-symbolizer invocation that should symbolize a particular instruction/offset in the binary, etc) and/or llvm-dwarfdump of a simple binary that fails symbolication when it shouldn't.<br> </div><div><div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><br></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div><div>FAIL: AddressSanitizer32 :: TestCases/use-after-free.cc (222 of 460)</div></div><div><div>******************** TEST 'AddressSanitizer32 :: TestCases/use-after-free.cc' FAILED ********************</div></div><div><div>Script:</div></div><div><div>--</div></div><div><div>/Users/kuba/llvm-tot-cmake-release/./bin/clang --driver-mode=g++ -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m32 -O0 /Users/kuba/llvm-tot/projects/compiler-rt/test/asan/TestCases/use-after-free.cc -o /Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp && not /Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp 2>&1 | FileCheck /Users/kuba/llvm-tot/projects/compiler-rt/test/asan/TestCases/use-after-free.cc --check-prefix=CHECK-Darwin --check-prefix=CHECK</div></div><div><div>/Users/kuba/llvm-tot-cmake-release/./bin/clang --driver-mode=g++ -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m32 -O1 /Users/kuba/llvm-tot/projects/compiler-rt/test/asan/TestCases/use-after-free.cc -o /Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp && not /Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp 2>&1 | FileCheck /Users/kuba/llvm-tot/projects/compiler-rt/test/asan/TestCases/use-after-free.cc --check-prefix=CHECK-Darwin --check-prefix=CHECK</div></div><div><div>/Users/kuba/llvm-tot-cmake-release/./bin/clang --driver-mode=g++ -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m32 -O2 /Users/kuba/llvm-tot/projects/compiler-rt/test/asan/TestCases/use-after-free.cc -o /Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp && not /Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp 2>&1 | FileCheck /Users/kuba/llvm-tot/projects/compiler-rt/test/asan/TestCases/use-after-free.cc --check-prefix=CHECK-Darwin --check-prefix=CHECK</div></div><div><div>/Users/kuba/llvm-tot-cmake-release/./bin/clang --driver-mode=g++ -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m32 -O3 /Users/kuba/llvm-tot/projects/compiler-rt/test/asan/TestCases/use-after-free.cc -o /Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp && not /Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp 2>&1 | FileCheck /Users/kuba/llvm-tot/projects/compiler-rt/test/asan/TestCases/use-after-free.cc --check-prefix=CHECK-Darwin --check-prefix=CHECK</div></div><div><div>--</div></div><div><div>Exit Code: 1</div></div><div><div><br></div></div><div><div>Command Output (stdout):</div></div><div><div>--</div></div><div><div>warning: no debug symbols in executable (-arch i386)</div></div><div><div><br></div></div><div><div>--</div></div><div><div>Command Output (stderr):</div></div><div><div>--</div></div><div><div>/Users/kuba/llvm-tot/projects/compiler-rt/test/asan/TestCases/use-after-free.cc:15:12: error: expected string not found in input</div></div><div><div> // CHECK: {{ #0 0x.* in main .*use-after-free.cc:}}[[@LINE-4]]</div></div><div><div> ^</div></div><div><div><stdin>:4:2: note: scanning from here</div></div><div><div> #0 0x75e5f in main (/Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp+0x1e5f)</div></div><div><div> ^</div></div><div><div><stdin>:4:2: note: with expression "@LINE-4" equal to "11"</div></div><div><div> #0 0x75e5f in main (/Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp+0x1e5f)</div></div><div><div> ^</div></div><div><div><stdin>:4:97: note: possible intended match here</div></div><div><div> #0 0x75e5f in main (/Users/kuba/llvm-tot-cmake-release/projects/compiler-rt/test/asan/32bitConfig/TestCases/Output/use-after-free.cc.tmp+0x1e5f)</div></div></blockquote><span><font color="#888888"><div><br></div><div>Kuba</div></font></span><div><div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Author: dblaikie<br>Date: Fri Sep 19 12:03:16 2014<br>New Revision: 218129<br>URL: <a href="http://llvm.org/viewvc/llvm-project?rev=218129&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=218129&view=rev</a><br>Log:<br>Omit DW_TAG_subprograms for subprograms without inlined subroutines when producing -gmlt data<br>To reduce the size of -gmlt data, skip the subprograms without any<br>inlined subroutines. Since we've now got the ability to make these<br>determinations in the backend (funnily enough - we added the flag so we<br>wouldn't produce ranges under -gmlt, but with this change we use the<br>flag, but go back to producing ranges under -gmlt).<br>Instead, just produce CU ranges to inform the consumer which parts of<br>the code are described by this CU's line table. Tools could inspect the<br>line table directly to compute the range, but the CU ranges only seem to<br>be about 0.5% of object/executable size, so I'm not too worried about<br>teaching llvm-symbolizer that trick just yet - it's certainly a possible<br>piece of future work.<br>Update an llvm-symbolizer test just to demonstrate that this schema is<br>acceptable there (if it wasn't, the compiler-rt tests would catch this,<br>but good to have an in-llvm-tree test for llvm-symbolizer's behavior<br>here)<br>Building the clang binary with -gmlt with this patch reduces the total<br>size of object files by 5.1% (5.56% without ranges) without compression<br>and the executable by 4.37% (4.75% without ranges).<br>Modified:<br> llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp<br> llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp<br> llvm/trunk/test/DebugInfo/Inputs/dwarfdump-inl-test.elf-x86-64<br> llvm/trunk/test/DebugInfo/gmlt.ll<br> llvm/trunk/test/DebugInfo/llvm-symbolizer.test</blockquote></div></div></div>
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