Commit Graph

4 Commits

Author SHA1 Message Date
David Blaikie c6c6c7b177 DebugInfo+DFSan: Ensure that debug info references to llvm::Functions remain pointing to the underlying function when wrappers are created
This is somewhat the inverse of how similar bugs in DAE and ArgPromo
manifested and were addressed. In those passes, individual call sites
were visited explicitly, and then the old function was deleted. This
left the debug info with a null llvm::Function* that needed to be
updated to point to the new function.

In the case of DFSan, it RAUWs the old function with the wrapper, which
includes debug info. So now the debug info refers to the wrapper, which
doesn't actually have any instructions with debug info in it, so it is
ignored entirely - resulting in a DW_TAG_subprogram with no high/low pc,
etc. Instead, fix up the debug info to refer to the original function
after the RAUW messed it up.

Reviewed/discussed with Peter Collingbourne on the llvm-dev mailing
list.

llvm-svn: 219249
2014-10-07 22:59:46 +00:00
Peter Collingbourne 28a10aff48 DataFlowSanitizer: Implement trampolines for function pointers passed to custom functions.
Differential Revision: http://llvm-reviews.chandlerc.com/D1503

llvm-svn: 189408
2013-08-27 22:09:06 +00:00
Peter Collingbourne 34f0c313e2 DataFlowSanitizer: Replace non-instrumented aliases of instrumented functions, and vice versa, with wrappers.
Differential Revision: http://llvm-reviews.chandlerc.com/D1442

llvm-svn: 189054
2013-08-22 20:08:15 +00:00
Peter Collingbourne cdc97373f8 DataFlowSanitizer: move abilist input file to Inputs.
llvm-svn: 188423
2013-08-14 22:28:36 +00:00