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diff --git a/debuginfod/debuginfod-client.c b/debuginfod/debuginfod-client.c
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index 18e7b85f..5ad6001b 100644
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--- a/debuginfod/debuginfod-client.c
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+++ b/debuginfod/debuginfod-client.c
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@@ -83,6 +83,7 @@ void debuginfod_end (debuginfod_client *c) { }
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#include <sys/stat.h>
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#include <sys/utsname.h>
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#include <curl/curl.h>
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+#include <signal.h>
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/* If fts.h is included before config.h, its indirect inclusions may not
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give us the right LFS aliases of these functions, so map them manually. */
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@@ -1128,7 +1129,24 @@ debuginfod_set_progressfn(debuginfod_client *client,
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/* NB: these are thread-unsafe. */
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__attribute__((constructor)) attribute_hidden void libdebuginfod_ctor(void)
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{
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+ /* The RHEL7 version of libcurl will muck with signal masks, messing up,
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+ e.g., gdb. */
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+ sigset_t original_mask;
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+ struct sigaction original_actions[NSIG];
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+
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+ sigprocmask (0, NULL, &original_mask);
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+
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+ /* Some signal numbers in the range are invalid and might produce
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+ an error (EINVAL). Simply ignore those, this is best effort. */
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+ for (int i = 1; i < NSIG; ++i)
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+ sigaction (i, NULL, &original_actions[i]);
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+
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curl_global_init(CURL_GLOBAL_DEFAULT);
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+
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+ for (int i = 1; i < NSIG; ++i)
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+ sigaction (i, &original_actions[i], NULL);
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+
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+ sigprocmask (SIG_SETMASK, &original_mask, NULL);
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}
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/* NB: this is very thread-unsafe: it breaks other threads that are still in libcurl */
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