Compiler-rt miscalculates the number of entries in the __llvm_prf_data section
on i386 Darwin. This results in a number of test failures (which we started
catching after r261344).
The fix we attempted earlier is insufficient (r261683). It caused some tests to
start passing again, but that hid the fact that we drop some data entries.
This patch should fix the real problem. It fixes the way we compute DataSize by
taking into account the way the Darwin linker lays out __llvm_prf_data.
Differential Revision: http://reviews.llvm.org/D17623
llvm-svn: 261957
Fix a crash when gathering value profile data on i386 Darwin.
The Darwin linker shrinks sections containing aligned structures when
padding is not explicitly added to the end of the structure. When
iterating over these structures, be sure to not walk past the end of the
section.
No tests added, since running `ninja check-profile` on i386 Darwin is
enough to reproduce the original crash.
llvm-svn: 261683
The profile reader no longer depends on this field to be updated and point
to owning func's vp data. The VP data also no longer needs to be allocated
in a contiguous memory space.
Differential Revision: http://reviews.llvm.org/D15258
llvm-svn: 256543
Value profile runtime depends on libc which breaks
buffer API implemenation with current file organization.
Test case is also updated to check more symbols.
llvm-svn: 255294
Xinliang David Li