diff options
Diffstat (limited to 'libdwfl/debuginfod-client.c')
| -rw-r--r-- | libdwfl/debuginfod-client.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/libdwfl/debuginfod-client.c b/libdwfl/debuginfod-client.c index 99b66b6e..153260c3 100644 --- a/libdwfl/debuginfod-client.c +++ b/libdwfl/debuginfod-client.c @@ -1,5 +1,6 @@ /* Try to get an ELF or debug file through the debuginfod. Copyright (C) 2019 Red Hat, Inc. + Copyright (C) 2022 Mark J. Wielaard <[email protected]> This file is part of elfutils. This file is free software; you can redistribute it and/or modify @@ -31,6 +32,7 @@ #endif #include "libdwflP.h" +#include <pthread.h> #include <dlfcn.h> static __typeof__ (debuginfod_begin) *fp_debuginfod_begin; @@ -38,6 +40,10 @@ static __typeof__ (debuginfod_find_executable) *fp_debuginfod_find_executable; static __typeof__ (debuginfod_find_debuginfo) *fp_debuginfod_find_debuginfo; static __typeof__ (debuginfod_end) *fp_debuginfod_end; +static void __libdwfl_debuginfod_init (void); + +static pthread_once_t init_control = PTHREAD_ONCE_INIT; + /* NB: this is slightly thread-unsafe */ static debuginfod_client * @@ -46,6 +52,8 @@ get_client (Dwfl *dwfl) if (dwfl->debuginfod != NULL) return dwfl->debuginfod; + pthread_once (&init_control, __libdwfl_debuginfod_init); + if (fp_debuginfod_begin != NULL) { dwfl->debuginfod = (*fp_debuginfod_begin) (); @@ -96,9 +104,9 @@ __libdwfl_debuginfod_end (debuginfod_client *c) (*fp_debuginfod_end) (c); } -/* Try to get the libdebuginfod library functions to make sure - everything is initialized early. */ -void __attribute__ ((constructor)) +/* Try to get the libdebuginfod library functions. + Only needs to be called once from get_client. */ +static void __libdwfl_debuginfod_init (void) { void *debuginfod_so = dlopen(DEBUGINFOD_SONAME, RTLD_LAZY); |