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40 lines
1.3 KiB
40 lines
1.3 KiB
2 years ago
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commit 405b8ae13540e9fd614df614e3361ebf9abd14cf
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Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Date: Tue Jul 5 12:58:40 2022 -0300
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elf: Fix wrong fscanf usage on tst-pldd
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The fix done b2cd93fce666fdc8c9a5c64af2741a8a6940ac99 does not really
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work since macro strification does not expand the sizeof nor the
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arithmetic operation.
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Checked on x86_64-linux-gnu.
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(cherry picked from commit c353689e49e72f3aafa1a9e68d4f7a4f33a79cbe)
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diff --git a/elf/tst-pldd.c b/elf/tst-pldd.c
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index 6e4174cbf95b15c0..d3ecb99149d619c6 100644
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--- a/elf/tst-pldd.c
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+++ b/elf/tst-pldd.c
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@@ -108,15 +108,16 @@ do_test (void)
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loader and libc. */
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{
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pid_t pid;
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- char buffer[512];
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-#define STRINPUT(size) "%" # size "s"
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+#define BUFFERLEN 511
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+ char buffer[BUFFERLEN + 1];
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+#define STRINPUT(size) XSTRINPUT(size)
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+#define XSTRINPUT(size) "%" # size "s"
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FILE *out = fmemopen (pldd.out.buffer, pldd.out.length, "r");
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TEST_VERIFY (out != NULL);
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/* First line is in the form of <pid>: <full path of executable> */
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- TEST_COMPARE (fscanf (out, "%u: " STRINPUT (sizeof (buffer) - 1), &pid,
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- buffer), 2);
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+ TEST_COMPARE (fscanf (out, "%u: " STRINPUT (BUFFERLEN), &pid, buffer), 2);
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TEST_COMPARE (pid, *target_pid_ptr);
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TEST_COMPARE (strcmp (basename (buffer), "tst-pldd"), 0);
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