[Sample Profile] make page size configurable for ProfiledBinary

[wjx951753]

Replace hardcoded 1024 page size with cofigurable Pagesize parameter.

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[llvmbot]

@llvm/pr-subscribers-pgo

Author: None (wjx951753)

Changes

Replace hardcoded 1024 page size with cofigurable Pagesize parameter.

---

Full diff: https://github.com/llvm/llvm-project/pull/164773.diff

1 Files Affected:

• (modified) llvm/tools/llvm-profgen/ProfiledBinary.cpp (+6-1)

diff --git a/llvm/tools/llvm-profgen/ProfiledBinary.cpp b/llvm/tools/llvm-profgen/ProfiledBinary.cpp
index 94728ce4abffe..a230238c8a218 100644
--- a/llvm/tools/llvm-profgen/ProfiledBinary.cpp
+++ b/llvm/tools/llvm-profgen/ProfiledBinary.cpp
@@ -70,6 +70,11 @@ static cl::opt<bool>
                  cl::desc("Generate the profile for Linux kernel binary."),
                  cl::cat(ProfGenCategory));
 
+static cl::opt<uint64_t>
+    Pagesize("page-size",
+                 cl::desc("page size"), cl::init(0x1000),
+                 cl::desc("target system pagee size."));
+
 namespace sampleprof {
 
 static const Target *getTarget(const ObjectFile *Obj) {
@@ -330,7 +335,7 @@ void ProfiledBinary::setPreferredTextSegmentAddresses(const ELFFile<ELFT> &Obj,
   // However such info isn't available at post-processing time, assuming
   // 4K page now. Note that we don't use EXEC_PAGESIZE from <linux/param.h>
   // because we may build the tools on non-linux.
-  uint64_t PageSize = 0x1000;
+  uint64_t PageSize = Pagesize;
   for (const typename ELFT::Phdr &Phdr : PhdrRange) {
     if (Phdr.p_type == ELF::PT_LOAD) {
       if (!FirstLoadableAddress)