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Get the handle from dlopen and not from debug infos #143

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merged 1 commit into from
Feb 28, 2024
Merged

Get the handle from dlopen and not from debug infos #143

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4 changes: 3 additions & 1 deletion src/gotcha_dl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -151,6 +151,7 @@ static void *dlopen_wrapper(const char *filename, int flags) {
}

static void *dlsym_wrapper(void *handle, const char *symbol_name) {
typeof(&dlopen_wrapper) orig_dlopen = gotcha_get_wrappee(orig_dlopen_handle);
typeof(&dlsym_wrapper) orig_dlsym = gotcha_get_wrappee(orig_dlsym_handle);
struct internal_binding_t *binding;
debug_printf(1, "User called dlsym(%p, %s)\n", handle, symbol_name);
Expand All @@ -161,7 +162,8 @@ static void *dlsym_wrapper(void *handle, const char *symbol_name) {
struct link_map *lib = gotchas_dlsym_rtld_next_lookup(
symbol_name, __builtin_return_address(0));
if (lib) {
void *symbol = orig_dlsym(lib, symbol_name);
void *handle = orig_dlopen(lib->l_name, RTLD_NOW);
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I have a doubt between RTLD_NOW and RTLD_LAZY

void *symbol = orig_dlsym(handle, symbol_name);
return symbol;
}
return NULL;
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