projects / babeltrace.git / blame
| Commit | Line | Data |
|---|---|---|
| 6073533d AB |
1 | debuginfo-data |
| 2 | ============== | |
| 3 | ||
| 4 | This directory contains pre-generated ELF and DWARF files used to test | |
| 351c00cd | 5 | the debug-info analysis feature, including lookup of DWARF debugging |
| 6073533d AB |
6 | information via build ID and debug link methods, as well as the source |
| 7 | files used to generate them. | |
| 8 | ||
| 9 | The generated files are: | |
| 10 | ||
| a1a328b0 MJ |
11 | * `libhello_so` (ELF and DWARF) |
| 12 | * `libhello_elf_so` (ELF only) | |
| 13 | * `libhello_build_id_so` (ELF with separate DWARF via build ID) | |
| 14 | * `libhello_debug_link_so` (ELF with separate DWARF via debug link) | |
| 15 | * `libhello_debug_link_so.debug` (DWARF for debug link) | |
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16 | * `.build-id/cd/d98cdd87f7fe64c13b6daad553987eafd40cbb.debug` (DWARF for build ID) |
| 17 | ||
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18 | We use a suffix of "_so" instead of ".so" since some distributions |
| 19 | build systems will consider ".so" files as artifacts from a previous | |
| 20 | build that were "left-over" and will remove them prior to the build. | |
| 21 | ||
| 6073533d AB |
22 | All files are generated from the four (4) following source files: |
| 23 | ||
| 24 | * libhello.c | |
| 25 | * libhello.h | |
| 26 | * tp.c | |
| 27 | * tp.h | |
| 28 | ||
| 29 | The generated executables were built using a GNU toolchain on an | |
| 30 | x86_64 machine. | |
| 31 | ||
| 32 | To regenerate them, you can use follow these steps: | |
| 33 | ||
| 34 | ## ELF and DWARF | |
| 35 | ||
| 36 | $ gcc -g -fPIC -c -I. tp.c libhello.c | |
| a1a328b0 | 37 | $ gcc -shared -g -llttng-ust -ldl -Wl,-soname,libhello.so -o libhello_so tp.o libhello.o |
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38 | |
| 39 | ## ELF only | |
| 40 | ||
| 41 | $ gcc -fPIC -c -I. tp.c libhello.c | |
| a1a328b0 | 42 | $ gcc -shared -llttng-ust -ldl -Wl,-soname,libhello_elf.so -o libhello_elf_so tp.o libhello.o |
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43 | |
| 44 | ## ELF and DWARF with Build ID | |
| 45 | ||
| 46 | $ gcc -g -fPIC -c -I. tp.c libhello.c | |
| a1a328b0 | 47 | $ gcc -shared -g -llttng-ust -ldl -Wl,-soname,libhello_build_id.so -Wl,--build-id=sha1 -o libhello_build_id_so tp.o libhello.o |
| 6073533d | 48 | $ mkdir -p .build-id/cd/ |
| a1a328b0 MJ |
49 | $ objcopy --only-keep-debug libhello_build_id_so .build-id/cd/d98cdd87f7fe64c13b6daad553987eafd40cbb.debug |
| 50 | $ strip -g libhello_build_id_so | |
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51 | |
| 52 | The build ID might not be the same once the executable is regenerated | |
| 53 | on your system, so adjust the values in the directory and file names | |
| 54 | accordingly. Refer to the GDB documentation for more information: | |
| 55 | https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html | |
| 56 | ||
| 57 | ## ELF and DWARF with Debug Link | |
| 58 | ||
| 59 | $ gcc -g -fPIC -c -I. tp.c libhello.c | |
| a1a328b0 | 60 | $ gcc -shared -g -llttng-ust -ldl -Wl,-soname,libhello_debug_link.so -o libhello_debug_link_so tp.o libhello.o |
| 6073533d | 61 | |
| a1a328b0 MJ |
62 | $ objcopy --only-keep-debug libhello_debug_link_so libhello_debug_link_so.debug |
| 63 | $ strip -g libhello_debug_link_so | |
| 64 | $ objcopy --add-gnu-debuglink=libhello_debug_link_so.debug libhello_debug_link_so |