[compiler-rt] [compiler-rt] Add `DumpAllRegisters` impl (PR #99049)

[Vitaly Buka via llvm-commits]

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@@ -2118,8 +2118,91 @@ bool SignalContext::IsTrueFaultingAddress() const {
   return si->si_signo == SIGSEGV && si->si_code != 128;
 }
 
+UNUSED
+static const char *RegNumToRegName(int reg) {
+#  if defined(__x86_64__)
+  switch (reg) {
+    case REG_RAX:
+      return "rax";
+    case REG_RBX:
+      return "rbx";
+    case REG_RCX:
+      return "rcx";
+    case REG_RDX:
+      return "rdx";
+    case REG_RDI:
+      return "rdi";
+    case REG_RSI:
+      return "rsi";
+    case REG_RBP:
+      return "rbp";
+    case REG_RSP:
+      return "rsp";
+    case REG_R8:
+      return "r8";
+    case REG_R9:
+      return "r9";
+    case REG_R10:
+      return "r10";
+    case REG_R11:
+      return "r11";
+    case REG_R12:
+      return "r12";
+    case REG_R13:
+      return "r13";
+    case REG_R14:
+      return "r14";
+    case REG_R15:
+      return "r15";
+    default:
+      return NULL;
+  }
+#  endif
+  return NULL;
+}
+
 void SignalContext::DumpAllRegisters(void *context) {
-  // FIXME: Implement this.
+#  if SANITIZER_LINUX
+  ucontext_t *ucontext = (ucontext_t *)context;
+#    define DUMPREG64(r)                             \
+      Printf("%s = 0x%016llx  ", RegNumToRegName(r), \
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vitalybuka wrote:

Also can we just move  SignalContext::DumpAllRegisters from MAC ?

https://github.com/llvm/llvm-project/pull/99049