126 lines
4.2 KiB
Diff
126 lines
4.2 KiB
Diff
commit 9aee0992d6e6ec4cce2c015d8da4b61022c6f6dd
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Author: Mark Wielaard <mark@klomp.org>
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Date: Wed Aug 4 21:01:27 2021 +0200
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tests: Allow an extra pthread_kill frame in backtrace tests
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glibc 2.34 calls pthread_kill from the raise function. Before raise
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directly called the (tg)kill syscall. So allow pthread_kill to be the
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first frame in a backtrace where raise is expected. Also change some
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asserts to fprintf plus abort to make it more clear why the testcase
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fails.
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https://sourceware.org/bugzilla/show_bug.cgi?id=28190
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Signed-off-by: Mark Wielaard <mark@klomp.org>
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diff --git a/tests/backtrace.c b/tests/backtrace.c
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index 36c8b8c4..afc12fb9 100644
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--- a/tests/backtrace.c
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+++ b/tests/backtrace.c
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@@ -97,6 +97,9 @@ callback_verify (pid_t tid, unsigned frameno, Dwarf_Addr pc,
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static bool reduce_frameno = false;
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if (reduce_frameno)
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frameno--;
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+ static bool pthread_kill_seen = false;
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+ if (pthread_kill_seen)
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+ frameno--;
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if (! use_raise_jmp_patching && frameno >= 2)
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frameno += 2;
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const char *symname2 = NULL;
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@@ -107,11 +110,26 @@ callback_verify (pid_t tid, unsigned frameno, Dwarf_Addr pc,
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&& (strcmp (symname, "__kernel_vsyscall") == 0
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|| strcmp (symname, "__libc_do_syscall") == 0))
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reduce_frameno = true;
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+ else if (! pthread_kill_seen && symname
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+ && strstr (symname, "pthread_kill") != NULL)
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+ pthread_kill_seen = true;
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else
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- assert (symname && strcmp (symname, "raise") == 0);
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+ {
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+ if (!symname || strcmp (symname, "raise") != 0)
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+ {
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+ fprintf (stderr,
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+ "case 0: expected symname 'raise' got '%s'\n", symname);
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+ abort ();
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+ }
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+ }
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break;
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case 1:
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- assert (symname != NULL && strcmp (symname, "sigusr2") == 0);
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+ if (symname == NULL || strcmp (symname, "sigusr2") != 0)
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+ {
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+ fprintf (stderr,
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+ "case 1: expected symname 'sigusr2' got '%s'\n", symname);
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+ abort ();
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+ }
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break;
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case 2: // x86_64 only
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/* __restore_rt - glibc maybe does not have to have this symbol. */
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@@ -120,11 +138,21 @@ callback_verify (pid_t tid, unsigned frameno, Dwarf_Addr pc,
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if (use_raise_jmp_patching)
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{
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/* Verify we trapped on the very first instruction of jmp. */
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- assert (symname != NULL && strcmp (symname, "jmp") == 0);
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+ if (symname == NULL || strcmp (symname, "jmp") != 0)
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+ {
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+ fprintf (stderr,
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+ "case 3: expected symname 'raise' got '%s'\n", symname);
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+ abort ();
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+ }
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mod = dwfl_addrmodule (dwfl, pc - 1);
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if (mod)
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symname2 = dwfl_module_addrname (mod, pc - 1);
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- assert (symname2 == NULL || strcmp (symname2, "jmp") != 0);
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+ if (symname2 == NULL || strcmp (symname2, "jmp") != 0)
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+ {
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+ fprintf (stderr,
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+ "case 3: expected symname2 'jmp' got '%s'\n", symname2);
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+ abort ();
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+ }
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break;
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}
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FALLTHROUGH;
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@@ -137,11 +165,22 @@ callback_verify (pid_t tid, unsigned frameno, Dwarf_Addr pc,
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duplicate_sigusr2 = true;
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break;
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}
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- assert (symname != NULL && strcmp (symname, "stdarg") == 0);
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+ if (symname == NULL || strcmp (symname, "stdarg") != 0)
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+ {
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+ fprintf (stderr,
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+ "case 4: expected symname 'stdarg' got '%s'\n", symname);
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+ abort ();
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+ }
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break;
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case 5:
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/* Verify we trapped on the very last instruction of child. */
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- assert (symname != NULL && strcmp (symname, "backtracegen") == 0);
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+ if (symname == NULL || strcmp (symname, "backtracegen") != 0)
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+ {
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+ fprintf (stderr,
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+ "case 5: expected symname 'backtracegen' got '%s'\n",
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+ symname);
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+ abort ();
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+ }
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mod = dwfl_addrmodule (dwfl, pc);
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if (mod)
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symname2 = dwfl_module_addrname (mod, pc);
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@@ -151,7 +190,15 @@ callback_verify (pid_t tid, unsigned frameno, Dwarf_Addr pc,
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// instructions or even inserts some padding instructions at the end
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// (which apparently happens on ppc64).
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if (use_raise_jmp_patching)
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- assert (symname2 == NULL || strcmp (symname2, "backtracegen") != 0);
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+ {
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+ if (symname2 != NULL && strcmp (symname2, "backtracegen") == 0)
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+ {
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+ fprintf (stderr,
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+ "use_raise_jmp_patching didn't expect symname2 "
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+ "'backtracegen'\n");
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+ abort ();
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+ }
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+ }
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break;
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}
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}
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