[PATCH] D23398: [XRay] Synthesize a reference to the xray_instr_map

[Reid Kleckner via llvm-commits]

rnk added a comment.

In https://reviews.llvm.org/D23398#542025, @majnemer wrote:

> It is a special case: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=gold/object.cc;h=a631c9937c5f589de5db561e381f161c637bdfde;hb=HEAD#l1618


It says right there that __section_start/end symbols will suppress the dead stripping, though:
1625           // If the section name XXX can be represented as a C identifier
1626           // it cannot be discarded if there are references to
1627           // __start_XXX and __stop_XXX symbols.  These need to be
1628           // specially handled.

Maybe we just need to generate two such synthetic references per object file, if the runtime doesn't do enough?


Repository:
  rL LLVM

https://reviews.llvm.org/D23398