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dlopen: log debug message when a library is dlopened

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Useful to track what is being used and when
This commit is contained in:
Luca Boccassi
2024-04-03 12:07:43 +01:00
parent e5d4adb173
commit dd6c0df65c
5 changed files with 14 additions and 1 deletions
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2
src/basic/dlfcn-util.c
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@@ -49,6 +49,8 @@ int dlopen_many_sym_or_warn_sentinel(void **dlp, const char *filename, int log_l
return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"%s is not installed: %s", filename, dlerror());
log_debug("Loaded '%s' via dlopen()", filename);
va_list ap;
va_start(ap, log_level);
r = dlsym_many_or_warnv(dl, log_level, ap);

4
src/shared/bpf-dlopen.c
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@@ -76,6 +76,8 @@ int dlopen_bpf(void) {
return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"neither libbpf.so.1 nor libbpf.so.0 are installed: %s", dlerror());
log_debug("Loaded 'libbpf.so.0' via dlopen()");
/* symbols deprecated in 1.0 we use as compat */
r = dlsym_many_or_warn(
dl, LOG_DEBUG,
@@ -89,6 +91,8 @@ int dlopen_bpf(void) {
#endif
);
} else {
log_debug("Loaded 'libbpf.so.1' via dlopen()");
/* symbols available from 0.7.0 */
r = dlsym_many_or_warn(
dl, LOG_DEBUG,

5
src/shared/idn-util.c
View File

@@ -50,7 +50,10 @@ int dlopen_idn(void) {
if (!dl)
return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"libidn support is not installed: %s", dlerror());
}
log_debug("Loaded 'libidn.so.11' via dlopen()");
} else
log_debug("Loaded 'libidn.so.12' via dlopen()");
r = dlsym_many_or_warn(
dl,

2
src/shared/tpm2-util.c
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@@ -668,6 +668,8 @@ int tpm2_context_new(const char *device, Tpm2Context **ret_context) {
if (!context->tcti_dl)
return log_debug_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE), "Failed to load %s: %s", fn, dlerror());
log_debug("Loaded '%s' via dlopen()", fn);
func = dlsym(context->tcti_dl, TSS2_TCTI_INFO_SYMBOL);
if (!func)
return log_debug_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE),

2
src/shared/userdb.c
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@@ -1455,6 +1455,8 @@ int userdb_block_nss_systemd(int b) {
return 0;
}
log_debug("Loaded '%s' via dlopen()", LIBDIR "/libnss_systemd.so.2");
call = dlsym(dl, "_nss_systemd_block");
if (!call)
/* If the file is installed but lacks the symbol we expect, things are weird, let's complain */