Signed-off-by: Tomek Grabiec <[email protected]>
---
include/vm/jni.h | 1 +
vm/jni-interface.c | 2 +-
vm/jni.c | 72 ++++++++++++++++++++++++++++++++++-----------------
3 files changed, 50 insertions(+), 25 deletions(-)
diff --git a/include/vm/jni.h b/include/vm/jni.h
index 866255d..4dd8b1c 100644
--- a/include/vm/jni.h
+++ b/include/vm/jni.h
@@ -71,6 +71,7 @@ struct java_vm {
typedef struct java_vm JavaVM;
void vm_jni_init(void);
+void vm_jni_init_interface(void);
struct vm_jni_env *vm_jni_get_jni_env(void);
struct java_vm *vm_jni_get_current_java_vm(void);
int vm_jni_load_object(const char *name);
diff --git a/vm/jni-interface.c b/vm/jni-interface.c
index d961c52..4575846 100644
--- a/vm/jni-interface.c
+++ b/vm/jni-interface.c
@@ -1350,7 +1350,7 @@ struct vm_jni_env *vm_jni_get_jni_env(void)
static void *jni_not_implemented_trap;
-void vm_jni_init(void)
+void vm_jni_init_interface(void)
{
jni_not_implemented_trap = alloc_guard_page(true);
if (!jni_not_implemented_trap)
diff --git a/vm/jni.c b/vm/jni.c
index 95f98ef..38e7e62 100644
--- a/vm/jni.c
+++ b/vm/jni.c
@@ -37,10 +37,27 @@
#include "vm/jni.h"
#include "vm/stack-trace.h"
+#include "lib/hash-map.h"
#include "lib/string.h"
-static int vm_jni_nr_loaded_objects;
-static void **vm_jni_loaded_objects;
+struct jni_object {
+ void *handle; /* returned by dlopen() */
+};
+
+static unsigned long jni_object_hash(const void *key, unsigned long size)
+{
+ unsigned long a;
+
+ a = (unsigned long) key;
+ return ((a >> 24) ^ (a >> 16) ^ (a >> 8) ^ a) % size;
+}
+
+static int jni_object_compare(const void *key1, const void *key2)
+{
+ return (long) key1 - (long) key2;
+}
+
+struct hash_map *jni_objects;
static char *vm_jni_get_mangled_name(const char *name)
{
@@ -85,34 +102,36 @@ static char *vm_jni_get_mangled_name(const char *name)
return result;
}
-static int vm_jni_lookup_object_handle(void *handle)
-{
- for (int i = 0; i < vm_jni_nr_loaded_objects; i++)
- if (vm_jni_loaded_objects[i] == handle)
- return i;
-
- return -1;
-}
-
-static int vm_jni_add_object_handle(void *handle)
+static int vm_jni_add_object(void *handle)
{
- void **new_table;
- int new_size;
+ struct jni_object *object;
- if (vm_jni_lookup_object_handle(handle) >= 0)
- return 0; /* handle already in table */
+ if (hash_map_contains(jni_objects, handle))
+ return 0;
- new_size = sizeof(void *) * (vm_jni_nr_loaded_objects + 1);
- new_table = realloc(vm_jni_loaded_objects, new_size);
- if (!new_table)
+ object = malloc(sizeof(*object));
+ if (!object)
return -ENOMEM;
- vm_jni_loaded_objects = new_table;
- vm_jni_loaded_objects[vm_jni_nr_loaded_objects++] = handle;
+ object->handle = handle;
+
+ if (hash_map_put(jni_objects, handle, object)) {
+ free(object);
+ return -1;
+ }
return 0;
}
+void vm_jni_init(void)
+{
+ jni_objects = alloc_hash_map(100, jni_object_hash, jni_object_compare);
+ if (!jni_objects)
+ error("failed to create jni_objects hash map");
+
+ vm_jni_init_interface();
+}
+
typedef jint onload_fn(JavaVM *, void *);
int vm_jni_load_object(const char *name)
@@ -123,7 +142,7 @@ int vm_jni_load_object(const char *name)
if (!handle)
return -1;
- if (vm_jni_add_object_handle(handle)) {
+ if (vm_jni_add_object(handle)) {
dlclose(handle);
return -ENOMEM;
}
@@ -144,10 +163,15 @@ int vm_jni_load_object(const char *name)
static void *vm_jni_lookup_symbol(const char *symbol_name)
{
- for (int i = 0; i < vm_jni_nr_loaded_objects; i++) {
+ struct hash_map_entry *this;
+
+ hash_map_for_each_entry(this, jni_objects) {
+ struct jni_object *object;
void *addr;
- addr = dlsym(vm_jni_loaded_objects[i], symbol_name);
+ object = this->value;
+
+ addr = dlsym(object->handle, symbol_name);
if (addr)
return addr;
}
--
1.6.0.6
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