[llvm-branch-commits] [compiler-rt] release/19.x: [compiler-rt] Support building runtimes for Windows on arm32 (#101462) (PR #106518)

[via llvm-branch-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: None (llvmbot)

<details>
<summary>Changes</summary>

Backport 5ea9dd8c7076270695a1d90b9c73718e7d95e0bf

Requested by: @<!-- -->mstorsjo

---
Full diff: https://github.com/llvm/llvm-project/pull/106518.diff


3 Files Affected:

- (modified) compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake (+4) 
- (modified) compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp (+7) 
- (modified) compiler-rt/lib/sanitizer_common/sanitizer_win.cpp (+5) 


``````````diff
diff --git a/compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake b/compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake
index 29e5beb6182ba3..37ad48bef818a2 100644
--- a/compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake
+++ b/compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake
@@ -24,6 +24,10 @@ if(APPLE)
   set(X86_64 x86_64 x86_64h)
 endif()
 
+if(WIN32)
+  set(ARM32 ${ARM32} armv7)
+endif()
+
 set(ALL_SANITIZER_COMMON_SUPPORTED_ARCH ${X86} ${X86_64} ${PPC64} ${RISCV64}
     ${ARM32} ${ARM64} ${MIPS32} ${MIPS64} ${S390X} ${SPARC} ${SPARCV9}
     ${HEXAGON} ${LOONGARCH64})
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp
index afcd01dae0b7a4..6fc18396ca63b0 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp
@@ -70,10 +70,17 @@ void BufferedStackTrace::UnwindSlow(uptr pc, void *context, u32 max_depth) {
   stack_frame.AddrStack.Offset = ctx.Rsp;
 #      endif
 #    else
+#      if SANITIZER_ARM
+  int machine_type = IMAGE_FILE_MACHINE_ARM;
+  stack_frame.AddrPC.Offset = ctx.Pc;
+  stack_frame.AddrFrame.Offset = ctx.R11;
+  stack_frame.AddrStack.Offset = ctx.Sp;
+#      else
   int machine_type = IMAGE_FILE_MACHINE_I386;
   stack_frame.AddrPC.Offset = ctx.Eip;
   stack_frame.AddrFrame.Offset = ctx.Ebp;
   stack_frame.AddrStack.Offset = ctx.Esp;
+#      endif
 #    endif
   stack_frame.AddrPC.Mode = AddrModeFlat;
   stack_frame.AddrFrame.Mode = AddrModeFlat;
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
index 995f00eddc38ae..8a80d54751364e 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
@@ -992,8 +992,13 @@ void SignalContext::InitPcSpBp() {
   sp = (uptr)context_record->Rsp;
 #    endif
 #  else
+#    if SANITIZER_ARM
+  bp = (uptr)context_record->R11;
+  sp = (uptr)context_record->Sp;
+#    else
   bp = (uptr)context_record->Ebp;
   sp = (uptr)context_record->Esp;
+#    endif
 #  endif
 }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/106518