Add a test for r331746.

Thanks to pcc for creating the test file!

2 files changed, 391 insertions, 0 deletions

diff --git a/llvm/test/Object/Inputs/archive-long-filenames-no-null-terminator.a b/llvm/test/Object/Inputs/archive-long-filenames-no-null-terminator.a
new file mode 100644
index 00000000000..e493bef9aaf
--- /dev/null
+++ b/llvm/test/Object/Inputs/archive-long-filenames-no-null-terminator.a
@@ -0,0 +1,252 @@
+!<arch>
+//                                              8816      `
+012345678901234567890123456789012345678901234567890123456789012-1.o/
+012345678901234567890123456789012345678901234567890123456789012-2.o/
+012345678901234567890123456789012345678901234567890123456789012-3.o/
+012345678901234567890123456789012345678901234567890123456789012-4.o/
+012345678901234567890123456789012345678901234567890123456789012-5.o/
+012345678901234567890123456789012345678901234567890123456789012-6.o/
+012345678901234567890123456789012345678901234567890123456789012-7.o/
+012345678901234567890123456789012345678901234567890123456789012-8.o/
+012345678901234567890123456789012345678901234567890123456789012-9.o/
+012345678901234567890123456789012345678901234567890123456789012-10.o/
+012345678901234567890123456789012345678901234567890123456789012-11.o/
+012345678901234567890123456789012345678901234567890123456789012-12.o/
+012345678901234567890123456789012345678901234567890123456789012-13.o/
+012345678901234567890123456789012345678901234567890123456789012-14.o/
+012345678901234567890123456789012345678901234567890123456789012-15.o/
+012345678901234567890123456789012345678901234567890123456789012-16.o/
+012345678901234567890123456789012345678901234567890123456789012-17.o/
+012345678901234567890123456789012345678901234567890123456789012-18.o/
+012345678901234567890123456789012345678901234567890123456789012-19.o/
+012345678901234567890123456789012345678901234567890123456789012-20.o/
+012345678901234567890123456789012345678901234567890123456789012-21.o/
+012345678901234567890123456789012345678901234567890123456789012-22.o/
+012345678901234567890123456789012345678901234567890123456789012-23.o/
+012345678901234567890123456789012345678901234567890123456789012-24.o/
+012345678901234567890123456789012345678901234567890123456789012-25.o/
+012345678901234567890123456789012345678901234567890123456789012-26.o/
+012345678901234567890123456789012345678901234567890123456789012-27.o/
+012345678901234567890123456789012345678901234567890123456789012-28.o/
+012345678901234567890123456789012345678901234567890123456789012-29.o/
+012345678901234567890123456789012345678901234567890123456789012-30.o/
+012345678901234567890123456789012345678901234567890123456789012-31.o/
+012345678901234567890123456789012345678901234567890123456789012-32.o/
+012345678901234567890123456789012345678901234567890123456789012-33.o/
+012345678901234567890123456789012345678901234567890123456789012-34.o/
+012345678901234567890123456789012345678901234567890123456789012-35.o/
+012345678901234567890123456789012345678901234567890123456789012-36.o/
+012345678901234567890123456789012345678901234567890123456789012-37.o/
+012345678901234567890123456789012345678901234567890123456789012-38.o/
+012345678901234567890123456789012345678901234567890123456789012-39.o/
+012345678901234567890123456789012345678901234567890123456789012-40.o/
+012345678901234567890123456789012345678901234567890123456789012-41.o/
+012345678901234567890123456789012345678901234567890123456789012-42.o/
+012345678901234567890123456789012345678901234567890123456789012-43.o/
+012345678901234567890123456789012345678901234567890123456789012-44.o/
+012345678901234567890123456789012345678901234567890123456789012-45.o/
+012345678901234567890123456789012345678901234567890123456789012-46.o/
+012345678901234567890123456789012345678901234567890123456789012-47.o/
+012345678901234567890123456789012345678901234567890123456789012-48.o/
+012345678901234567890123456789012345678901234567890123456789012-49.o/
+012345678901234567890123456789012345678901234567890123456789012-50.o/
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+012345678901234567890123456789012345678901234567890123456789012-52.o/
+012345678901234567890123456789012345678901234567890123456789012-53.o/
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+012345678901234567890123456789012345678901234567890123456789012-58.o/
+012345678901234567890123456789012345678901234567890123456789012-59.o/
+012345678901234567890123456789012345678901234567890123456789012-60.o/
+012345678901234567890123456789012345678901234567890123456789012-61.o/
+012345678901234567890123456789012345678901234567890123456789012-62.o/
+012345678901234567890123456789012345678901234567890123456789012-63.o/
+012345678901234567890123456789012345678901234567890123456789012-64.o/
+012345678901234567890123456789012345678901234567890123456789012-65.o/
+012345678901234567890123456789012345678901234567890123456789012-66.o/
+012345678901234567890123456789012345678901234567890123456789012-67.o/
+012345678901234567890123456789012345678901234567890123456789012-68.o/
+012345678901234567890123456789012345678901234567890123456789012-69.o/
+012345678901234567890123456789012345678901234567890123456789012-70.o/
+012345678901234567890123456789012345678901234567890123456789012-71.o/
+012345678901234567890123456789012345678901234567890123456789012-72.o/
+012345678901234567890123456789012345678901234567890123456789012-73.o/
+012345678901234567890123456789012345678901234567890123456789012-74.o/
+012345678901234567890123456789012345678901234567890123456789012-75.o/
+012345678901234567890123456789012345678901234567890123456789012-76.o/
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+012345678901234567890123456789012345678901234567890123456789012-81.o/
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+012345678901234567890123456789012345678901234567890123456789012-84.o/
+012345678901234567890123456789012345678901234567890123456789012-85.o/
+012345678901234567890123456789012345678901234567890123456789012-86.o/
+012345678901234567890123456789012345678901234567890123456789012-87.o/
+012345678901234567890123456789012345678901234567890123456789012-88.o/
+012345678901234567890123456789012345678901234567890123456789012-89.o/
+012345678901234567890123456789012345678901234567890123456789012-90.o/
+012345678901234567890123456789012345678901234567890123456789012-91.o/
+012345678901234567890123456789012345678901234567890123456789012-92.o/
+012345678901234567890123456789012345678901234567890123456789012-93.o/
+012345678901234567890123456789012345678901234567890123456789012-94.o/
+012345678901234567890123456789012345678901234567890123456789012-95.o/
+012345678901234567890123456789012345678901234567890123456789012-96.o/
+012345678901234567890123456789012345678901234567890123456789012-97.o/
+012345678901234567890123456789012345678901234567890123456789012-98.o/
+012345678901234567890123456789012345678901234567890123456789012-99.o/
+012345678901234567890123456789012345678901234567890123456789012-100.o/
+012345678901234567890123456789012345678901234567890123456789012-101.o/
+012345678901234567890123456789012345678901234567890123456789012-102.o/
+012345678901234567890123456789012345678901234567890123456789012-103.o/
+012345678901234567890123456789012345678901234567890123456789012-104.o/
+012345678901234567890123456789012345678901234567890123456789012-105.o/
+012345678901234567890123456789012345678901234567890123456789012-106.o/
+012345678901234567890123456789012345678901234567890123456789012-107.o/
+012345678901234567890123456789012345678901234567890123456789012-108.o/
+012345678901234567890123456789012345678901234567890123456789012-109.o/
+012345678901234567890123456789012345678901234567890123456789012-110.o/
+012345678901234567890123456789012345678901234567890123456789012-111.o/
+012345678901234567890123456789012345678901234567890123456789012-112.o/
+012345678901234567890123456789012345678901234567890123456789012-113.o/
+012345678901234567890123456789012345678901234567890123456789012-114.o/
+012345678901234567890123456789012345678901234567890123456789012-115.o/
+012345678901234567890123456789012345678901234567890123456789012-116.o/
+012345678901234567890123456789012345678901234567890123456789012-117.o/
+012345678901234567890123456789012345678901234567890123456789012-118.o/
+012345678901234567890123456789012345678901234567890123456789012-119.o/
+012345678901234567890123456789012345678901234567890123456789012-120.o/
+012345678901234567890123456789012345678901234567890123456789012-121.o/
+012345678901234567890123456789012345678901234567890123456789012-122.o/
+012345678901234567890123456789012345678901234567890123456789012-123.o/
+012345678901234567890123456789012345678901234567890123456789012-124.o/
+xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o/
+/0              0           0     0     644     0         `
+/69             0           0     0     644     0         `
+/138            0           0     0     644     0         `
+/207            0           0     0     644     0         `
+/276            0           0     0     644     0         `
+/345            0           0     0     644     0         `
+/414            0           0     0     644     0         `
+/483            0           0     0     644     0         `
+/552            0           0     0     644     0         `
+/621            0           0     0     644     0         `
+/691            0           0     0     644     0         `
+/761            0           0     0     644     0         `
+/831            0           0     0     644     0         `
+/901            0           0     0     644     0         `
+/971            0           0     0     644     0         `
+/1041           0           0     0     644     0         `
+/1111           0           0     0     644     0         `
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+/1531           0           0     0     644     0         `
+/1601           0           0     0     644     0         `
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+/1741           0           0     0     644     0         `
+/1811           0           0     0     644     0         `
+/1881           0           0     0     644     0         `
+/1951           0           0     0     644     0         `
+/2021           0           0     0     644     0         `
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+/2161           0           0     0     644     0         `
+/2231           0           0     0     644     0         `
+/2301           0           0     0     644     0         `
+/2371           0           0     0     644     0         `
+/2441           0           0     0     644     0         `
+/2511           0           0     0     644     0         `
+/2581           0           0     0     644     0         `
+/2651           0           0     0     644     0         `
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+/2931           0           0     0     644     0         `
+/3001           0           0     0     644     0         `
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+/3141           0           0     0     644     0         `
+/3211           0           0     0     644     0         `
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diff --git a/llvm/test/Object/archive-long-filenames-no-null-terminator.test b/llvm/test/Object/archive-long-filenames-no-null-terminator.test
new file mode 100644
index 00000000000..3af08db1702
--- /dev/null
+++ b/llvm/test/Object/archive-long-filenames-no-null-terminator.test
@@ -0,0 +1,139 @@
+Check that extracting long filenames works correctly even when there is no
+null terminator after the filename. Depending on whether the OS provides a
+readable page containing a null byte after the file mapping, this would crash
+before r331746 (on Windows it crashed consistently).
+
+The input file was created like:
+
+$ touch 012345678901234567890123456789012345678901234567890123456789012-{1..124}.o \
+    xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
+$ llvm-ar cru file.a 012345678901234567890123456789012345678901234567890123456789012-{1..124}.o \
+    xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.o
+
+RUN: llvm-ar t %p/Inputs/archive-long-filenames-no-null-terminator.a | FileCheck %s
+
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-1.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-2.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-3.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-4.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-5.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-6.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-7.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-8.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-9.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-10.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-11.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-12.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-13.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-14.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-15.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-16.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-17.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-18.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-19.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-20.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-21.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-22.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-23.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-24.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-25.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-26.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-27.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-28.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-29.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-30.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-31.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-32.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-33.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-34.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-35.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-36.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-37.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-38.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-39.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-40.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-41.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-42.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-43.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-44.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-45.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-46.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-47.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-48.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-49.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-50.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-51.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-52.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-53.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-54.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-55.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-56.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-57.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-58.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-59.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-60.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-61.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-62.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-63.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-64.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-65.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-66.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-67.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-68.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-69.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-70.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-71.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-72.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-73.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-74.o
+CHECK: 012345678901234567890123456789012345678901234567890123456789012-75.o
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