Commit Graph

19 Commits

Author SHA1 Message Date
Frederic Riss b88adbdeb0 [DebugInfo] Move all DWARF headers to the public include directory.
dsymutil needs access to DWARF specific inforamtion, the small DIContext
wrapper isn't sufficient. Other DWARF consumers might want to use it too
(I'm looking at you lldb).

Differential Revision: http://reviews.llvm.org/D6694

llvm-svn: 224594
2014-12-19 18:26:33 +00:00
Alexey Samsonov 0670cfaf01 [DWARF parser] Fix broken address ranges construction.
Previous algorithm for constructing [Address ranges]->[Compile Units]
mapping was wrong. It somewhat relied on the assumption that address ranges
for different compile units may not overlap. It is not so.
For example, two compile units may contain the definition of the same
linkonce_odr function. These definitions will be merged at link-time,
resulting in equivalent .debug_ranges entries for both these units

Instead of sorting and merging original address ranges (from .debug_ranges
and .debug_aranges), implement a different approach: save endpoints
of all ranges, and then use a sweep-line approach to construct
the desired mapping. If we find that certain address maps to
several compilation units, we just pick any of them.

llvm-svn: 210860
2014-06-12 23:58:49 +00:00
Alexey Samsonov fee0ee24c8 [DWARF parser] Simplify DWARFDebugAranges generation.
There is no need to keep the whole contents of .debug_aranges section
in memory when we build address ranges table. Memory optimization that
used to be in this code (precalculate the size of vector of ranges before
filling it) is not really needed - later we will compact and resize this
vector anyway.

llvm-svn: 207457
2014-04-28 22:27:46 +00:00
Alexey Samsonov 001ecd9aa9 [DWARF parser] Cleanup code in DWARFDebugAranges.
No functionality change.

llvm-svn: 207276
2014-04-25 21:30:03 +00:00
Alexey Samsonov 762343da6c [DWARF parser] Refactor fetching DIE address ranges.
Add a helper method to get address ranges specified in a DIE
(either by DW_AT_low_pc/DW_AT_high_pc, or by DW_AT_ranges). Use it
to untangle and simplify the code.

No functionality change.

llvm-svn: 206624
2014-04-18 17:25:46 +00:00
Alexey Samsonov 1eabf98b32 [C++11] Convert DWARF parser to range-based for loops
llvm-svn: 203766
2014-03-13 07:52:54 +00:00
Alexey Samsonov 15a2335db4 [DebugInfo] Further simplify DWARFDebugAranges public interface
llvm-svn: 191813
2013-10-02 07:12:47 +00:00
Alexey Samsonov ad4bf3db3a [DebugInfo] Simplify and speedup .debug_aranges parsing
Parsing .debug_aranges section now takes O(nlogn) operations instead
of O(n^2), where "n" is the number of address ranges. With this change,
the time required to symbolize an address from a random large
Clang-generated binary drops from 165 seconds to 1.5 seconds.

No functionality change.

llvm-svn: 191781
2013-10-01 16:52:46 +00:00
Alexey Samsonov 97e8a87cfb [DebugInfo] Further simplify DWARFDebugAranges. No functionality change.
llvm-svn: 191779
2013-10-01 16:25:14 +00:00
Alexey Samsonov 0c9b72559c [DebugInfo] Remove unused functions from DWARFDebugAranges and fix code style.
llvm-svn: 191778
2013-10-01 15:48:10 +00:00
Alexey Samsonov e3ba81bf19 Add support for DebugFission to DWARF parser
Summary:
1) Make llvm-symbolizer properly symbolize
files with split debug info (by using stanalone .dwo files).
2) Make DWARFCompileUnit parse and store corresponding .dwo file,
if necessary.
3) Make bits of DWARF parsing more CompileUnit-oriented.

Reviewers: echristo

Reviewed By: echristo

CC: bkramer, llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1164

llvm-svn: 189329
2013-08-27 09:20:22 +00:00
Matt Arsenault 4ab769f4b3 Fix missing std::. Not sure how this compiles for anyone else.
llvm-svn: 177620
2013-03-21 00:57:21 +00:00
Alexey Samsonov a1694c1aaf [DebugInfo] Generate address ranges for compile units even if .debug_aranges is present: it is often the case that .debug_aranges section contains ranges only for a small subset of compile units. Test cases will be added in separate commits.
llvm-svn: 168144
2012-11-16 08:36:25 +00:00
Roman Divacky 09c8a3dde5 Remove unused typedefs gcc4.8 warns about.
llvm-svn: 163225
2012-09-05 17:55:46 +00:00
Alexey Samsonov f4462fa3ca This patch extends the libLLVMDebugInfo which contains a minimalistic DWARF parser:
1) DIContext is now able to return function name for a given instruction address (besides file/line info).
2) llvm-dwarfdump accepts flag --functions that prints the function name (if address is specified by --address flag).
3) test case that checks the basic functionality of llvm-dwarfdump added

llvm-svn: 159512
2012-07-02 05:54:45 +00:00
Benjamin Kramer f3da529028 Add more PRI.64 macros for MSVC and use them throughout the codebase.
llvm-svn: 143799
2011-11-05 08:57:40 +00:00
Benjamin Kramer 112ec17e1b DWARF: Reset the state after parsing a line table prologue and remove an unnecessary lookup.
llvm-svn: 139859
2011-09-15 21:59:13 +00:00
Benjamin Kramer 3266493603 DWARF: Generate the address lookup table from the DIE tree if .debug_aranges is not available.
Ported from LLDB.

llvm-svn: 139732
2011-09-14 20:52:27 +00:00
Benjamin Kramer a6002fd920 DWARF: Port support for parsing .debug_aranges section from LLDB and wire it up to llvm-dwarfdump.
This is only one half of it, the part that caches address ranges from the DIEs when .debug_aranges is
not available will be ported soon.

llvm-svn: 139680
2011-09-14 01:09:52 +00:00