[sanitizer] Add char **GetEnviron() on all other platforms

Subscribers: kubamracek, llvm-commits

Differential Revision: https://reviews.llvm.org/D54165

llvm-svn: 346257

compiler-rt/lib/sanitizer_common/sanitizer_common.h

@@ -224,6 +224,7 @@ u32 GetUid();
 void ReExec();
 void CheckASLR();
 char **GetArgv();
+char **GetEnviron();
 void PrintCmdline();
 bool StackSizeIsUnlimited();
 uptr GetStackSizeLimitInBytes();

compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc

@@ -451,6 +451,7 @@ char **StoredArgv;
 char **StoredEnviron;
 
 char **GetArgv() { return StoredArgv; }
+char **GetEnviron() { return StoredEnviron; }
 
 const char *GetEnv(const char *name) {
   if (StoredEnviron) {

compiler-rt/lib/sanitizer_common/sanitizer_linux.cc

@@ -623,8 +623,13 @@ char **GetArgv() {
   return argv;
 }
 
-void ReExec() {
+char **GetEnviron() {
   char **argv, **envp;
+  GetArgsAndEnv(&argv, &envp);
+  return envp;
+}
+
+void ReExec() {
   const char *pathname = "/proc/self/exe";
 
 #if SANITIZER_NETBSD
@@ -646,8 +651,7 @@ void ReExec() {
   pathname = reinterpret_cast<const char *>(getauxval(AT_EXECFN));
 #endif
 
-  GetArgsAndEnv(&argv, &envp);
-  uptr rv = internal_execve(pathname, argv, envp);
+  uptr rv = internal_execve(pathname, GetArgv(), GetEnviron());
   int rverrno;
   CHECK_EQ(internal_iserror(rv, &rverrno), true);
   Printf("execve failed, errno %d\n", rverrno);

compiler-rt/lib/sanitizer_common/sanitizer_openbsd.cc

@@ -99,6 +99,12 @@ char **GetArgv() {
   return argv;
 }
 
+char **GetEnviron() {
+  char **argv, **envp;
+  GetArgsAndEnv(&argv, &envp);
+  return envp;
+}
+
 void ReExec() {
   UNIMPLEMENTED();
 }

compiler-rt/lib/sanitizer_common/sanitizer_rtems.cc

@@ -240,6 +240,7 @@ bool IsAccessibleMemoryRange(uptr beg, uptr size) {
 }
 
 char **GetArgv() { return nullptr; }
+char **GetEnviron() { return nullptr; }
 
 const char *GetEnv(const char *name) {
   return getenv(name);

compiler-rt/lib/sanitizer_common/sanitizer_win.cc

@@ -1021,6 +1021,11 @@ char **GetArgv() {
   return 0;
 }
 
+char **GetEnviron() {
+  // FIXME: Actually implement this function.
+  return 0;
+}
+
 pid_t StartSubprocess(const char *program, const char *const argv[],
                       fd_t stdin_fd, fd_t stdout_fd, fd_t stderr_fd) {
   // FIXME: implement on this platform