[compiler-rt] Require glibc for DumpAllRegisters on Linux (#101131)

For example musl doesn't provide REG_R* definitions for ARM

#100398

Author: chestnykh

compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp

@@ -2121,7 +2121,7 @@ bool SignalContext::IsTrueFaultingAddress() const {
 UNUSED
 static const char *RegNumToRegName(int reg) {
   switch (reg) {
-#  if SANITIZER_LINUX
+#  if SANITIZER_LINUX && SANITIZER_GLIBC
 #    if defined(__x86_64__)
     case REG_RAX:
       return "rax";
@@ -2240,14 +2240,15 @@ static const char *RegNumToRegName(int reg) {
     case 31:
       return "sp";
 #    endif
-#  endif  // SANITIZER_LINUX
+#  endif  // SANITIZER_LINUX && SANITIZER_GLIBC
     default:
       return NULL;
   }
   return NULL;
 }
 
-#  if SANITIZER_LINUX && (defined(__arm__) || defined(__aarch64__))
+#  if SANITIZER_LINUX && SANITIZER_GLIBC && \
+      (defined(__arm__) || defined(__aarch64__))
 static uptr GetArmRegister(ucontext_t *ctx, int RegNum) {
   switch (RegNum) {
 #    if defined(__arm__)
@@ -2289,7 +2290,8 @@ static uptr GetArmRegister(ucontext_t *ctx, int RegNum) {
   }
   return 0;
 }
-#  endif  // SANITIZER_LINUX && (defined(__arm__) || defined(__aarch64__))
+#  endif  // SANITIZER_LINUX && SANITIZER_GLIBC && (defined(__arm__) ||
+          // defined(__aarch64__))
 
 UNUSED
 static void DumpSingleReg(ucontext_t *ctx, int RegNum) {
@@ -2312,7 +2314,7 @@ static void DumpSingleReg(ucontext_t *ctx, int RegNum) {
 
 void SignalContext::DumpAllRegisters(void *context) {
   ucontext_t *ucontext = (ucontext_t *)context;
-#  if SANITIZER_LINUX
+#  if SANITIZER_LINUX && SANITIZER_GLIBC
 #    if defined(__x86_64__)
   Report("Register values:\n");
   DumpSingleReg(ucontext, REG_RAX);

compiler-rt/test/sanitizer_common/TestCases/Linux/dump_registers_aarch64.cpp

@@ -3,7 +3,7 @@
 // RUN: %env_tool_opts=dump_registers=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-NODUMP
 // RUN: not %run %t 2>&1 | FileCheck %s --strict-whitespace --check-prefix=CHECK-DUMP
 //
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch && glibc
 
 #include <signal.h>
 

compiler-rt/test/sanitizer_common/TestCases/Linux/dump_registers_arm.cpp

@@ -3,7 +3,7 @@
 // RUN: %env_tool_opts=dump_registers=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-NODUMP
 // RUN: not %run %t 2>&1 | FileCheck %s --strict-whitespace --check-prefix=CHECK-DUMP
 //
-// REQUIRES: arm-target-arch
+// REQUIRES: arm-target-arch && glibc
 
 #include <signal.h>
 

compiler-rt/test/sanitizer_common/TestCases/Linux/dump_registers_i386.cpp

@@ -3,7 +3,7 @@
 // RUN: %env_tool_opts=dump_registers=0 not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-NODUMP --strict-whitespace
 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-DUMP --strict-whitespace
 //
-// REQUIRES: i386-target-arch
+// REQUIRES: i386-target-arch && glibc
 
 #include <signal.h>
 

compiler-rt/test/sanitizer_common/TestCases/Linux/dump_registers_x86_64.cpp

@@ -3,7 +3,7 @@
 // RUN: %env_tool_opts=dump_registers=0 not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-NODUMP --strict-whitespace
 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-DUMP --strict-whitespace
 //
-// REQUIRES: x86_64-target-arch
+// REQUIRES: x86_64-target-arch && glibc
 
 #include <signal.h>