[compiler-rt] ffac900 - [compiler-rt] [sanitizer] Silence -Wframe-larger-than= for a few windows functions with large stack buffers

[Martin Storsjö via llvm-commits]

Author: Martin Storsjö
Date: 2021-01-08T22:54:03+02:00
New Revision: ffac9001d987096537b94ed7a1e4e4a4665d571f

URL: https://github.com/llvm/llvm-project/commit/ffac9001d987096537b94ed7a1e4e4a4665d571f
DIFF: https://github.com/llvm/llvm-project/commit/ffac9001d987096537b94ed7a1e4e4a4665d571f.diff

LOG: [compiler-rt] [sanitizer] Silence -Wframe-larger-than= for a few windows functions with large stack buffers

Also update a documentation url while touching code nearby, as
requested in review.

Differential Revision: https://reviews.llvm.org/D91853

Added: 
    

Modified: 
    compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_win.cpp
    compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp
    compiler-rt/lib/sanitizer_common/sanitizer_win.cpp

Removed: 
    


################################################################################
diff  --git a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_win.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_win.cpp
index 48fa2d1033ae..7db7d3b0eb9d 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_win.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_win.cpp
@@ -133,10 +133,14 @@ void InitializeDbgHelpIfNeeded() {
   }
 }
 
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wframe-larger-than="
+#endif
 bool WinSymbolizerTool::SymbolizePC(uptr addr, SymbolizedStack *frame) {
   InitializeDbgHelpIfNeeded();
 
-  // See http://msdn.microsoft.com/en-us/library/ms680578(VS.85).aspx
+  // See https://docs.microsoft.com/en-us/windows/win32/debug/retrieving-symbol-information-by-address
   char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME * sizeof(CHAR)];
   PSYMBOL_INFO symbol = (PSYMBOL_INFO)buffer;
   symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
@@ -162,6 +166,9 @@ bool WinSymbolizerTool::SymbolizePC(uptr addr, SymbolizedStack *frame) {
   // Otherwise, try llvm-symbolizer.
   return got_fileline;
 }
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
 
 const char *WinSymbolizerTool::Demangle(const char *name) {
   CHECK(is_dbghelp_initialized);

diff  --git a/compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp
index e2edf428004e..7e01c81d0422 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_unwind_win.cpp
@@ -43,6 +43,10 @@ void BufferedStackTrace::UnwindSlow(uptr pc, u32 max_depth) {
   trace_buffer[0] = pc;
 }
 
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wframe-larger-than="
+#endif
 void BufferedStackTrace::UnwindSlow(uptr pc, void *context, u32 max_depth) {
   CHECK(context);
   CHECK_GE(max_depth, 2);
@@ -74,6 +78,9 @@ void BufferedStackTrace::UnwindSlow(uptr pc, void *context, u32 max_depth) {
     trace_buffer[size++] = (uptr)stack_frame.AddrPC.Offset;
   }
 }
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
 #endif  // #if !SANITIZER_GO
 
 #endif  // SANITIZER_WINDOWS

diff  --git a/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
index 281854aff261..63c90785f270 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
@@ -611,6 +611,10 @@ static uptr GetPreferredBase(const char *modname) {
   return (uptr)pe_header->ImageBase;
 }
 
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wframe-larger-than="
+#endif
 void ListOfModules::init() {
   clearOrInit();
   HANDLE cur_process = GetCurrentProcess();
@@ -672,6 +676,9 @@ void ListOfModules::init() {
   }
   UnmapOrDie(hmodules, modules_buffer_size);
 }
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
 
 void ListOfModules::fallbackInit() { clear(); }