GN: aix port along with linux_s390x, linux_ppc64 and linux_ppc64le support.

base/debug/stack_trace_posix.cc

Index: base/debug/stack_trace_posix.cc
diff --git a/base/debug/stack_trace_posix.cc b/base/debug/stack_trace_posix.cc
index 4a55f64cc6c1a16069c18451ab85c9d77f207d2f..5d6ff899b9a812260c8cb1cf3d8e4438a72a686c 100644
--- a/base/debug/stack_trace_posix.cc
+++ b/base/debug/stack_trace_posix.cc
@@ -26,7 +26,7 @@
 #if !defined(USE_SYMBOLIZE)
 #include <cxxabi.h>
 #endif
-#if !defined(__UCLIBC__)
+#if !defined(__UCLIBC__) && !defined(_AIX)
 #include <execinfo.h>
 #endif
 
@@ -80,8 +80,7 @@ void DemangleSymbols(std::string* text) {
   // Note: code in this function is NOT async-signal safe (std::string uses
   // malloc internally).
 
-#if !defined(__UCLIBC__)
-
+#if !defined(__UCLIBC__) && !defined(_AIX)
   std::string::size_type search_from = 0;
   while (search_from < text->size()) {
     // Look for the start of a mangled symbol, from search_from.
@@ -116,7 +115,7 @@ void DemangleSymbols(std::string* text) {
       search_from = mangled_start + 2;
     }
   }
-#endif  // !defined(__UCLIBC__)
+#endif  // !defined(__UCLIBC__) && !defined(_AIX)
 }
 #endif  // !defined(USE_SYMBOLIZE)
 
@@ -128,7 +127,7 @@ class BacktraceOutputHandler {
   virtual ~BacktraceOutputHandler() {}
 };
 
-#if !defined(__UCLIBC__)
+#if !defined(__UCLIBC__) && !defined(_AIX)
 void OutputPointer(void* pointer, BacktraceOutputHandler* handler) {
   // This should be more than enough to store a 64-bit number in hex:
   // 16 hex digits + 1 for null-terminator.
@@ -205,7 +204,7 @@ void ProcessBacktrace(void *const *trace,
   }
 #endif  // defined(USE_SYMBOLIZE)
 }
-#endif  // !defined(__UCLIBC__)
+#endif  // !defined(__UCLIBC__) && !defined(_AIX)
 
 void PrintToStderr(const char* output) {
   // NOTE: This code MUST be async-signal safe (it's used by in-process
@@ -722,7 +721,7 @@ StackTrace::StackTrace(size_t count) {
 // NOTE: This code MUST be async-signal safe (it's used by in-process
 // stack dumping signal handler). NO malloc or stdio is allowed here.
 
-#if !defined(__UCLIBC__)
+#if !defined(__UCLIBC__) && !defined(_AIX)
   count = std::min(arraysize(trace_), count);
 
   // Though the backtrace API man page does not list any possible negative
@@ -737,13 +736,13 @@ void StackTrace::Print() const {
   // NOTE: This code MUST be async-signal safe (it's used by in-process
   // stack dumping signal handler). NO malloc or stdio is allowed here.
 
-#if !defined(__UCLIBC__)
+#if !defined(__UCLIBC__) && !defined(_AIX)
   PrintBacktraceOutputHandler handler;
   ProcessBacktrace(trace_, count_, &handler);
 #endif
 }
 
-#if !defined(__UCLIBC__)
+#if !defined(__UCLIBC__) && !defined(_AIX)
 void StackTrace::OutputToStream(std::ostream* os) const {
   StreamBacktraceOutputHandler handler(os);
   ProcessBacktrace(trace_, count_, &handler);