[XRay] Implement `llvm-xray extract`, start of the llvm-xray tool

Usage:

  llvm-xray extract <object file> [-o <filename or '-'>]

The tool gets the XRay instrumentation map from an object file and turns
it into YAML.  We first support ELF64 sleds on x86_64 binaries, with
provision for supporting other supported platforms and formats later.

This is the first of a many-part change to fully implement the
`llvm-xray` tool.

We also define a subcommand registration and dispatch mechanism to be
used by other further subcommand implementations for llvm-xray.

Diffusion Revision: https://reviews.llvm.org/D21987

llvm-svn: 285165

5 files changed, 0 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-xray/X86/Inputs/elf32-noxray.bin b/llvm/test/tools/llvm-xray/X86/Inputs/elf32-noxray.bin
new file mode 100755
index 00000000000..06446e71a87
--- /dev/null
+++ b/llvm/test/tools/llvm-xray/X86/Inputs/elf32-noxray.bin
diff --git a/llvm/test/tools/llvm-xray/X86/Inputs/elf64-badentrysizes.bin b/llvm/test/tools/llvm-xray/X86/Inputs/elf64-badentrysizes.bin
new file mode 100755
index 00000000000..702ea1484df
--- /dev/null
+++ b/llvm/test/tools/llvm-xray/X86/Inputs/elf64-badentrysizes.bin
diff --git a/llvm/test/tools/llvm-xray/X86/Inputs/elf64-example.bin b/llvm/test/tools/llvm-xray/X86/Inputs/elf64-example.bin
new file mode 100755
index 00000000000..a6e6d3d6468
--- /dev/null
+++ b/llvm/test/tools/llvm-xray/X86/Inputs/elf64-example.bin
diff --git a/llvm/test/tools/llvm-xray/X86/Inputs/elf64-noinstr-map.bin b/llvm/test/tools/llvm-xray/X86/Inputs/elf64-noinstr-map.bin
new file mode 100755
index 00000000000..6f2d9d21f2e
--- /dev/null
+++ b/llvm/test/tools/llvm-xray/X86/Inputs/elf64-noinstr-map.bin
diff --git a/llvm/test/tools/llvm-xray/X86/Inputs/empty-file.bin b/llvm/test/tools/llvm-xray/X86/Inputs/empty-file.bin
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/llvm/test/tools/llvm-xray/X86/Inputs/empty-file.bin