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 | |
| 5 | the debuginfo analysis feature, including lookup of DWARF debugging | |
| 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 | ||
| 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) | |
| 16 | * `.build-id/cd/d98cdd87f7fe64c13b6daad553987eafd40cbb.debug` (DWARF for build ID) | |
| 17 | ||
| 18 | All files are generated from the four (4) following source files: | |
| 19 | ||
| 20 | * libhello.c | |
| 21 | * libhello.h | |
| 22 | * tp.c | |
| 23 | * tp.h | |
| 24 | ||
| 25 | The generated executables were built using a GNU toolchain on an | |
| 26 | x86_64 machine. | |
| 27 | ||
| 28 | To regenerate them, you can use follow these steps: | |
| 29 | ||
| 30 | ## ELF and DWARF | |
| 31 | ||
| 32 | $ gcc -g -fPIC -c -I. tp.c libhello.c | |
| 33 | $ gcc -shared -g -llttng-ust -ldl -Wl,-soname,libhello.so -o libhello.so tp.o libhello.o | |
| 34 | ||
| 35 | ## ELF only | |
| 36 | ||
| 37 | $ gcc -fPIC -c -I. tp.c libhello.c | |
| 38 | $ gcc -shared -llttng-ust -ldl -Wl,-soname,libhello_elf.so -o libhello_elf.so tp.o libhello.o | |
| 39 | ||
| 40 | ## ELF and DWARF with Build ID | |
| 41 | ||
| 42 | $ gcc -g -fPIC -c -I. tp.c libhello.c | |
| 43 | $ 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 | |
| 44 | $ mkdir -p .build-id/cd/ | |
| 45 | $ objcopy --only-keep-debug libhello_build_id.so .build-id/cd/d98cdd87f7fe64c13b6daad553987eafd40cbb.debug | |
| 46 | $ strip -g libhello_build_id.so | |
| 47 | ||
| 48 | The build ID might not be the same once the executable is regenerated | |
| 49 | on your system, so adjust the values in the directory and file names | |
| 50 | accordingly. Refer to the GDB documentation for more information: | |
| 51 | https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html | |
| 52 | ||
| 53 | ## ELF and DWARF with Debug Link | |
| 54 | ||
| 55 | $ gcc -g -fPIC -c -I. tp.c libhello.c | |
| 56 | $ gcc -shared -g -llttng-ust -ldl -Wl,-soname,libhello_debug_link.so -o libhello_debug_link.so tp.o libhello.o | |
| 57 | ||
| 58 | $ objcopy --only-keep-debug libhello_debug_link.so libhello_debug_link.so.debug | |
| 59 | $ strip -g libhello_debug_link.so | |
| 60 | $ objcopy --add-gnu-debuglink=libhello_debug_link.so.debug libhello_debug_link.so |