1 files changed, 97 insertions, 23 deletions

diff --git a/lldb/source/Host/linux/Host.cpp b/lldb/source/Host/linux/Host.cpp
index cddc5dbb71f..c173a25dfe2 100644
--- a/lldb/source/Host/linux/Host.cpp
+++ b/lldb/source/Host/linux/Host.cpp
@@ -28,31 +28,11 @@
 using namespace lldb;
 using namespace lldb_private;
 
-bool
-Host::GetOSVersion(uint32_t &major, 
-                   uint32_t &minor, 
-                   uint32_t &update)
+namespace
 {
-    struct utsname un;
-    int status;
-
-    if (uname(&un))
-        return false;
-
-    status = sscanf(un.release, "%u.%u.%u", &major, &minor, &update);
-     return status == 3;
-}
-
-Error
-Host::LaunchProcess (ProcessLaunchInfo &launch_info)
-{
-    Error error;
-    assert(!"Not implemented yet!!!");
-    return error;
-}
 
 lldb::DataBufferSP
-Host::GetAuxvData(lldb_private::Process *process)
+ReadProcPseudoFile(lldb::pid_t pid, const char *name)
 {
     static const size_t path_size = 128;
     static char path[path_size];
@@ -65,7 +45,7 @@ Host::GetAuxvData(lldb_private::Process *process)
     // dynamically generated by the kernel) which is incompatible with the
     // current ReadFileContents implementation.  Therefore we simply stream the
     // data into a DataBuffer ourselves.
-    if (snprintf(path, path_size, "/proc/%" PRIu64 "/auxv", process->GetID()) < 0)
+    if (snprintf(path, path_size, "/proc/%" PRIu64 "/%s", pid, name) < 0)
         return buf_sp;
 
     if ((fd = open(path, O_RDONLY, 0)) < 0)
@@ -96,3 +76,97 @@ Host::GetAuxvData(lldb_private::Process *process)
 
     return buf_sp;
 }
+
+} // anonymous namespace
+
+bool
+Host::GetOSVersion(uint32_t &major,
+                   uint32_t &minor,
+                   uint32_t &update)
+{
+    struct utsname un;
+    int status;
+
+    if (uname(&un))
+        return false;
+
+    status = sscanf(un.release, "%u.%u.%u", &major, &minor, &update);
+    return status == 3;
+}
+
+Error
+Host::LaunchProcess (ProcessLaunchInfo &launch_info)
+{
+    Error error;
+    assert(!"Not implemented yet!!!");
+    return error;
+}
+
+lldb::DataBufferSP
+Host::GetAuxvData(lldb_private::Process *process)
+{
+    return ReadProcPseudoFile(process->GetID(), "auxv");
+}
+
+
+bool
+Host::GetProcessInfo (lldb::pid_t pid, ProcessInstanceInfo &process_info)
+{
+    process_info.Clear();
+    process_info.SetProcessID(pid);
+
+    // Architecture is intentionally omitted because that's better resolved
+    // in other places (see ProcessPOSIX::DoAttachWithID().
+
+    // Use special code here because proc/[pid]/exe is a symbolic link.
+    char link_path[PATH_MAX];
+    char exe_path[PATH_MAX] = "";
+    if (snprintf(link_path, PATH_MAX, "/proc/%" PRIu64 "/exe", pid) > 0)
+    {
+        ssize_t len = readlink(link_path, exe_path, sizeof(exe_path) - 1);
+        if (len > 0)
+            exe_path[len] = 0;
+
+        static const ssize_t deleted_len = strlen(" (deleted)");
+        if (len > deleted_len &&
+            !strcmp(exe_path + len - deleted_len, " (deleted)"))
+        {
+            exe_path[len - deleted_len] = 0;
+        }
+    }
+    process_info.GetExecutableFile().SetFile(exe_path, false);
+
+    lldb::DataBufferSP buf_sp;
+
+    // Get the process environment.
+    buf_sp = ReadProcPseudoFile(pid, "environ");
+    Args &info_env = process_info.GetEnvironmentEntries();
+    char *next_var = (char *)buf_sp->GetBytes();
+    char *end_buf = next_var + buf_sp->GetByteSize();
+    while (next_var < end_buf && 0 != *next_var)
+    {
+        info_env.AppendArgument(next_var);
+        next_var += strlen(next_var) + 1;
+    }
+
+    // Get the commond line used to start the process.
+    buf_sp = ReadProcPseudoFile(pid, "cmdline");
+
+    // Grab Arg0 first.
+    char *cmd = (char *)buf_sp->GetBytes();
+    process_info.SetArg0(cmd);
+
+    // Now process any remaining arguments.
+    Args &info_args = process_info.GetArguments();
+    char *next_arg = cmd + strlen(cmd) + 1;
+    end_buf = cmd + buf_sp->GetByteSize();
+    while (next_arg < end_buf && 0 != *next_arg)
+    {
+        info_args.AppendArgument(next_arg);
+        next_arg += strlen(next_arg) + 1;
+    }
+
+    // FIXME: Parse /proc/<pid>/status to get uid, gid, euid, egid and parent_pid
+
+    return true;
+}
\ No newline at end of file