llvm-mirror/tools/llvm-readobj
Sanjoy Das 58149dbd85 [Stackmap] Added callsite counts to emitted function information.
Summary:
It was previously not possible for tools to use solely the stackmap
information emitted to reconstruct the return addresses of callsites in
the map, which is necessary to use the information to walk a stack. This
patch adds per-function callsite counts when emitting the stackmap
section in order to resolve the problem. Note that this slightly alters
the stackmap format, so external tools parsing these maps will need to
be updated.

**Problem Details:**
Records only store their offset from the beginning of the function they
belong to. While these records and the functions are output in program
order, it is not possible to determine where the end of one function's
records are without the callsite count when processing the records to
compute return addresses.

Patch by Kavon Farvardin!

Reviewers: atrick, ributzka, sanjoy

Subscribers: nemanjai

Differential Revision: https://reviews.llvm.org/D23487

llvm-svn: 281532
2016-09-14 20:22:03 +00:00
..
ARMAttributeParser.cpp Move llvm-readobj/StreamWriter to Support. 2016-05-03 00:28:04 +00:00
ARMAttributeParser.h Move llvm-readobj/StreamWriter to Support. 2016-05-03 00:28:04 +00:00
ARMEHABIPrinter.h Move llvm-readobj/StreamWriter to Support. 2016-05-03 00:28:04 +00:00
ARMWinEHPrinter.cpp Thread Expected<...> up from libObject’s getSymbolAddress() for symbols to allow 2016-06-24 18:24:42 +00:00
ARMWinEHPrinter.h Move llvm-readobj/StreamWriter to Support. 2016-05-03 00:28:04 +00:00
CMakeLists.txt [msf] Resubmit "Rename Msf -> MSF". 2016-07-29 20:56:36 +00:00
CodeView.h Silence gcc warning about ternary and enumerations 2016-01-28 23:59:35 +00:00
COFFDumper.cpp [Stackmap] Added callsite counts to emitted function information. 2016-09-14 20:22:03 +00:00
COFFImportDumper.cpp llvm-readobj: Dump more info for COFF import libraries. 2015-08-28 10:27:50 +00:00
ELFDumper.cpp [Stackmap] Added callsite counts to emitted function information. 2016-09-14 20:22:03 +00:00
Error.cpp Add FIXMEs to all derived classes of std::error_category. 2016-05-24 20:13:46 +00:00
Error.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
llvm-readobj.cpp [pdb] Write PDB TPI Stream from Yaml. 2016-09-09 17:46:17 +00:00
llvm-readobj.h [CodeView] Decouple record deserialization from visitor dispatch. 2016-08-05 21:45:34 +00:00
LLVMBuild.txt [msf] Resubmit "Rename Msf -> MSF". 2016-07-29 20:56:36 +00:00
MachODumper.cpp [Stackmap] Added callsite counts to emitted function information. 2016-09-14 20:22:03 +00:00
ObjDumper.cpp Move llvm-readobj/StreamWriter to Support. 2016-05-03 00:28:04 +00:00
ObjDumper.h llvm-readobj: add support for printing GNU Notes 2016-08-30 18:52:02 +00:00
StackMapPrinter.h [Stackmap] Added callsite counts to emitted function information. 2016-09-14 20:22:03 +00:00
Win64EHDumper.cpp Thread Expected<...> up from libObject’s getSymbolAddress() for symbols to allow 2016-06-24 18:24:42 +00:00
Win64EHDumper.h Move llvm-readobj/StreamWriter to Support. 2016-05-03 00:28:04 +00:00