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[dwarfdump] Pretty print location expressions and location lists

Description

[dwarfdump] Pretty print location expressions and location lists

Summary:
Based on Fred's patch here: https://reviews.llvm.org/D6771

I can't seem to commandeer the old review, so I'm creating a new one.

With that change the locations exrpessions are pretty printed inline in the
DIE tree. The output looks like this for debug_loc entries:

DW_AT_location [DW_FORM_data4]        (0x00000000
   0x0000000000000001 - 0x000000000000000b: DW_OP_consts +3
   0x000000000000000b - 0x0000000000000012: DW_OP_consts +7
   0x0000000000000012 - 0x000000000000001b: DW_OP_reg0 RAX, DW_OP_piece 0x4
   0x000000000000001b - 0x0000000000000024: DW_OP_breg5 RDI+0)

And like this for debug_loc.dwo entries:

DW_AT_location [DW_FORM_sec_offset]   (0x00000000
  Addr idx 2 (w/ length 190): DW_OP_consts +0, DW_OP_stack_value
  Addr idx 3 (w/ length 23): DW_OP_reg0 RAX, DW_OP_piece 0x4)

Simple locations without ranges are printed inline:

DW_AT_location [DW_FORM_block1]       (DW_OP_reg4 RSI, DW_OP_piece 0x4, DW_OP_bit_piece 0x20 0x0)

The debug_loc(.dwo) dumping in changed accordingly to factor the code.

Reviewers: dblaikie, aprantl, friss

Subscribers: mgorny, javed.absar, hiraditya, llvm-commits, JDevlieghere

Differential Revision: https://reviews.llvm.org/D37123

Details

Committed
rnkAug 29 2017, 2:41 PM
Differential Revision
D37123: [dwarfdump] Pretty print location expressions and location lists
Parents
rL312041: Merging r312022:
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