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Fix dlsym(3) to do breadth first search.

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dlsym(3) with handle != RTLD_DEFAULT|RTLD_NEXT performs
  breadth first search through the dependency tree.

Bug: 16653281
Change-Id: I017a6975d1a62abb0218a7eb59ae4deba458e324
This commit is contained in:
Dmitriy Ivanov
2014-07-28 17:32:20 -07:00
parent a7dc7600fe
commit aa0f2bdbc2
7 changed files with 128 additions and 19 deletions
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21
tests/dlfcn_test.cpp
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@@ -62,10 +62,9 @@ TEST(dlfcn, dlsym_in_self) {
ASSERT_EQ(0, dlclose(self));
}
#if !defined(__LP64__)
// Current compiler/static linker used for aarch64
// platform optimizes LOCAL PROTECTED symbol
// in libtest_local_symbol.so out of existence
#if defined(__arm__)
// This seems to be working only for arm.
// Others platforms optimize LOCAL PROTECTED symbols.
TEST(dlfcn, dlsym_local_symbol) {
void* handle = dlopen("libtest_local_symbol.so", RTLD_NOW);
ASSERT_TRUE(handle != NULL);
@@ -78,9 +77,23 @@ TEST(dlfcn, dlsym_local_symbol) {
f = reinterpret_cast<uint32_t (*)(void)>(dlsym(handle, "dlsym_local_symbol_get_taxicab_number_using_dlsym"));
ASSERT_TRUE(f != NULL);
ASSERT_EQ(1729U, f());
dlclose(handle);
}
#endif
TEST(dlfcn, dlsym_with_dependencies) {
void* handle = dlopen("libtest_with_dependency.so", RTLD_NOW);
ASSERT_TRUE(handle != NULL);
dlerror();
// This symbol is in DT_NEEDED library.
void* sym = dlsym(handle, "getRandomNumber");
ASSERT_TRUE(sym != NULL);
int (*fn)(void);
fn = reinterpret_cast<int (*)(void)>(sym);
EXPECT_EQ(4, fn());
dlclose(handle);
}
TEST(dlfcn, dlopen_noload) {
void* handle = dlopen("libtest_simple.so", RTLD_NOW | RTLD_NOLOAD);
ASSERT_TRUE(handle == NULL);