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src/os/aix/vm/loadlib_aix.hpp
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rev 9211 : 8140645: Recent Developments for AIX
Summary: Port recent developments from SAP for AIX to the OpenJDK
@@ -32,97 +32,71 @@
#ifndef OS_AIX_VM_LOADLIB_AIX_HPP
#define OS_AIX_VM_LOADLIB_AIX_HPP
class outputStream;
-// This class holds information about a single loaded library module.
+// Struct holds information about a single loaded library module.
// Note that on AIX, a single library can be spread over multiple
// uintptr_t range on a module base, eg.
// libC.a(shr3_64.o) or libC.a(shrcore_64.o).
-class LoadedLibraryModule {
- friend class LoadedLibraries;
+// Note: all pointers to strings (path, member) point to strings which are immortal.
+struct loaded_module_t {
- char fullpath[512]; // eg /usr/lib/libC.a
- char shortname[30]; // eg libC.a
- char membername[30]; // eg shrcore_64.o
- const unsigned char* text_from;
- const unsigned char* text_to;
- const unsigned char* data_from;
- const unsigned char* data_to;
+ // points to the full path of the lodaed module, e.g.
+ // "/usr/lib/libC.a"
+ const char* path;
+
+ // host library name without path
+ const char* shortname;
+
+ // points to the object file (AIX specific stuff)
+ // e.g "shrcore_64.o"
+ const char* member;
+
+ // text area from, to
+ const void* text;
+ size_t text_len;
+
+ // data area from, to
+ const void* data;
+ size_t data_len;
- public:
-
- const char* get_fullpath() const {
- return fullpath;
- }
- const char* get_shortname() const {
- return shortname;
- }
- const char* get_membername() const {
- return membername;
- }
-
- // text_from, text_to: returns the range of the text (code)
- // segment for that module
- const unsigned char* get_text_from() const {
- return text_from;
- }
- const unsigned char* get_text_to() const {
- return text_to;
- }
-
- // data_from/data_to: returns the range of the data
- // segment for that module
- const unsigned char* get_data_from() const {
- return data_from;
- }
- const unsigned char* get_data_to() const {
- return data_to;
- }
-
- // returns true if the
- bool is_in_text(const unsigned char* p) const {
- return p >= text_from && p < text_to ? true : false;
- }
-
- bool is_in_data(const unsigned char* p) const {
- return p >= data_from && p < data_to ? true : false;
- }
-
- // output debug info
- void print(outputStream* os) const;
+ // true if this module is part of the vm
+ bool is_in_vm;
}; // end LoadedLibraryModule
// This class is a singleton holding a map of all loaded binaries
// in the AIX process space.
class LoadedLibraries
// : AllStatic (including allocation.hpp just for AllStatic is overkill.)
{
- private:
-
- enum {MAX_MODULES = 100};
- static LoadedLibraryModule tab[MAX_MODULES];
- static int num_loaded;
-
public:
- // rebuild the internal table of LoadedLibraryModule objects
- static void reload();
-
- // checks whether the address p points to any of the loaded code segments.
- // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
- static const LoadedLibraryModule* find_for_text_address(const unsigned char* p);
-
- // checks whether the address p points to any of the loaded data segments.
- // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
- static const LoadedLibraryModule* find_for_data_address(const unsigned char* p);
+ // rebuild the internal module table. If an error occurs, internal module
+ // table remains untouched.
+ static bool reload();
+
+ // check whether the given address points into the text segment of a
+ // loaded module. Return true if this is the case.
+ // Optionally, information about the module is returned (info)
+ static bool find_for_text_address (
+ const void* p,
+ loaded_module_t* info // optional, leave NULL if not needed.
+ );
+
+ // check whether the given address points into the data segment of a
+ // loaded module. Return true if this is the case.
+ // Optionally, information about the module is returned (info)
+ static bool find_for_data_address (
+ const void* p,
+ loaded_module_t* info // optional, leave NULL if not needed.
+ );
// output debug info
static void print(outputStream* os);
}; // end LoadedLibraries
-
#endif // OS_AIX_VM_LOADLIB_AIX_HPP
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