From: Heather McIntyre <h...@rice.edu>
* tests/.gitignore: Add eu_search_cfi.
* tests/Makefile.am: Add eu_search_cfi, run-eu-search-cfi.sh.
* tests/eu_search_cfi.c: New file.
* tests/run-eu-search-cfi.sh: New file.
Signed-off-by: Heather S. McIntyre <h...@rice.edu>
Signed-off-by: Aaron Merey <ame...@redhat.com>
Signed-off-by: Mark Wielaard <m...@klomp.org>
---
v5 changes: pthread added to eu_search_cfi_LDFLAGS unconditionally.
A review for this patch has already been posted by Mark:
https://sourceware.org/pipermail/elfutils-devel/2025q1/007797.html
tests/.gitignore | 1 +
tests/Makefile.am | 8 +-
tests/eu_search_cfi.c | 201 +++++++++++++++++++++++++++++++++++++
tests/run-eu-search-cfi.sh | 31 ++++++
4 files changed, 239 insertions(+), 2 deletions(-)
create mode 100644 tests/eu_search_cfi.c
create mode 100755 tests/run-eu-search-cfi.sh
diff --git a/tests/.gitignore b/tests/.gitignore
index 14620fc3..bf17d646 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -67,6 +67,7 @@
/elfstrtab
/elf-print-reloc-syms
/emptyfile
+/eu_search_cfi
/fillfile
/find-prologues
/funcretval
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 9ca97b6f..3b37344d 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -65,6 +65,7 @@ check_PROGRAMS = arextract arsymtest newfile saridx scnnames
sectiondump \
msg_tst system-elf-libelf-test system-elf-gelf-test \
nvidia_extended_linemap_libdw elf-print-reloc-syms \
cu-dwp-section-info declfiles \
+ eu_search_cfi \
$(asm_TESTS)
asm_TESTS = asm-tst1 asm-tst2 asm-tst3 asm-tst4 asm-tst5 \
@@ -217,7 +218,7 @@ TESTS = run-arextract.sh run-arsymtest.sh run-ar.sh newfile
test-nlist \
run-readelf-dw-form-indirect.sh run-strip-largealign.sh \
run-readelf-Dd.sh run-dwfl-core-noncontig.sh run-cu-dwp-section-info.sh
\
run-declfiles.sh \
- run-sysroot.sh
+ run-sysroot.sh run-eu-search-cfi.sh
if !BIARCH
export ELFUTILS_DISABLE_BIARCH = 1
@@ -688,7 +689,8 @@ EXTRA_DIST = run-arextract.sh run-arsymtest.sh run-ar.sh \
testfile-dwp-4-cu-index-overflow.dwp.bz2 \
testfile-dwp-cu-index-overflow.source \
testfile-define-file.bz2 \
- testfile-sysroot.tar.bz2 run-sysroot.sh run-debuginfod-seekable.sh
+ testfile-sysroot.tar.bz2 run-sysroot.sh run-debuginfod-seekable.sh
\
+ run-eu-search-cfi.sh \
thread-safety-subr.sh
@@ -874,6 +876,8 @@ nvidia_extended_linemap_libdw_LDADD = $(libelf) $(libdw)
elf_print_reloc_syms_LDADD = $(libelf)
cu_dwp_section_info_LDADD = $(libdw)
declfiles_LDADD = $(libdw)
+eu_search_cfi_LDFLAGS = -pthread $(AM_LDFLAGS)
+eu_search_cfi_LDADD = $(libeu) $(libelf) $(libdw)
# We want to test the libelf headers against the system elf.h header.
# Don't include any -I CPPFLAGS. Except when we install our own elf.h.
diff --git a/tests/eu_search_cfi.c b/tests/eu_search_cfi.c
new file mode 100644
index 00000000..4a46ab1c
--- /dev/null
+++ b/tests/eu_search_cfi.c
@@ -0,0 +1,201 @@
+/* Test program for eu_search_cfi
+ Copyright (C) 2023 Red Hat, Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see<http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+#include <assert.h>
+#include <inttypes.h>
+#include ELFUTILS_HEADER(dw)
+#include <dwarf.h>
+#include <argp.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "system.h"
+#include <pthread.h>
+
+static void handle_section (char *name, const unsigned char e_ident[],
+ Elf_Scn *scn, const bool is_eh);
+static void *thread_work (void *arg);
+
+typedef struct
+{
+ char *name;
+ const unsigned char *e_ident;
+ Elf_Scn * scn;
+ bool is_eh;
+}
+ThreadData;
+
+static void *thread_work (void *arg)
+{
+ ThreadData *data = (ThreadData *) arg;
+ handle_section (data->name, data->e_ident, data->scn, data->is_eh);
+ return NULL;
+}
+
+static void handle_section (char *name, const unsigned char e_ident[],
+ Elf_Scn *scn, const bool is_eh)
+{
+ if (is_eh)
+ printf (".eh_frame\n");
+ else
+ printf (".debug_frame\n");
+
+ GElf_Shdr mem;
+ GElf_Shdr *shdr = gelf_getshdr (scn, &mem);
+
+ if (shdr == NULL)
+ error (EXIT_FAILURE, 0, "Couldn't get section header: %s",
+ elf_errmsg (-1));
+
+ if ((shdr->sh_flags &SHF_COMPRESSED) != 0)
+ {
+ if (elf_compress (scn, 0, 0) < 0)
+ error (EXIT_FAILURE, 0, "Couldn't decompress section: %s",
+ elf_errmsg (-1));
+ }
+ else if (name[0] == '.' && name[1] == 'z')
+ {
+ if (elf_compress_gnu (scn, 0, 0) < 0)
+ error (EXIT_FAILURE, 0, "Couldn't decompress section: %s",
+ elf_errmsg (-1));
+ }
+
+ Elf_Data *data = elf_getdata (scn, NULL);
+ if (data == NULL || data->d_buf == NULL)
+ error (EXIT_FAILURE, 0, "no section data");
+
+ int res;
+ Dwarf_Off off;
+ Dwarf_Off next_off = 0;
+ Dwarf_CFI_Entry entry;
+ while ((res = dwarf_next_cfi (e_ident, data, is_eh, off = next_off,
+ &next_off, &entry)) == 0)
+ {
+ printf ("[%" PRId64 "] ", off);
+ if (dwarf_cfi_cie_p (&entry))
+ printf ("CIE augmentation=\"%s\"\n", entry.cie.augmentation);
+ else
+ {
+ printf ("FDE cie=[%" PRId64 "]\n", entry.fde.CIE_pointer);
+
+ Dwarf_Off cie_off = entry.fde.CIE_pointer;
+ Dwarf_Off cie_off_next;
+ Dwarf_CFI_Entry cie_entry;
+ if (dwarf_next_cfi (e_ident, data, is_eh, cie_off, &cie_off_next,
+ &cie_entry) != 0
+ || !dwarf_cfi_cie_p (&cie_entry))
+ error (EXIT_FAILURE, 0, "FDE doesn't point to CIE");
+ }
+ }
+
+ if (res < 0)
+ error (EXIT_FAILURE, 0, "dwarf_next_cfi failed: %s\n",
+ dwarf_errmsg (-1));
+}
+
+int main (int argc, char *argv[])
+{
+ if (argc != 2)
+ error (EXIT_FAILURE, 0, "need file name argument");
+
+ const char *file = argv[1];
+ printf ("%s\n", file);
+
+ int fd = open (file, O_RDONLY);
+ if (fd == -1)
+ error (EXIT_FAILURE, errno, "cannot open input file `%s'", file);
+
+ elf_version (EV_CURRENT);
+
+ Elf *elf = elf_begin (fd, ELF_C_READ, NULL);
+ if (elf == NULL)
+ error (EXIT_FAILURE, 0, "cannot create ELF descriptor: %s",
+ elf_errmsg (-1));
+
+ size_t esize;
+ const unsigned char *ident
+ = (const unsigned char *) elf_getident (elf, &esize);
+
+ if (ident == NULL || esize < EI_NIDENT)
+ error (EXIT_FAILURE, 0, "no, or too small, ELF ident");
+
+ GElf_Ehdr ehdr;
+ if (gelf_getehdr (elf, &ehdr) == NULL)
+ error (EXIT_FAILURE, 0, "cannot get the ELF header: %s\n", elf_errmsg
(-1));
+
+ size_t strndx = ehdr.e_shstrndx;
+
+ int num_threads = 4;
+ pthread_t threads[num_threads];
+ ThreadData thread_data;
+
+ Elf_Scn *scn = NULL;
+ while ((scn = elf_nextscn (elf, scn)) != NULL)
+ {
+ GElf_Shdr shdr;
+ if (gelf_getshdr (scn, &shdr) != NULL)
+ {
+ char *name = elf_strptr (elf, strndx, (size_t) shdr.sh_name);
+ if (name != NULL && shdr.sh_type == SHT_PROGBITS)
+ {
+ bool is_eh = false;
+ if (strcmp (name, ".eh_frame") == 0)
+ is_eh = true;
+ else if (strcmp (name, ".debug_frame") == 0
+ || strcmp (name, ".zdebug_frame") == 0)
+ is_eh = false;
+ else
+ continue;
+
+ thread_data.name = name;
+ thread_data.e_ident = ident;
+ thread_data.scn = scn;
+ thread_data.is_eh = is_eh;
+
+ for (int i = 0; i < num_threads; i++)
+ if (pthread_create (&threads[i], NULL, thread_work,
+ &thread_data) != 0)
+ {
+ perror ("pthread_create");
+
+ for (int j = 0; j < i; j++)
+ pthread_cancel (threads[j]);
+
+ elf_end (elf);
+ close (fd);
+ return 1;
+ }
+
+ for (int i = 0; i < num_threads; i++)
+ if (pthread_join (threads[i], NULL) != 0)
+ perror ("pthread_join");
+ }
+ }
+ }
+
+ elf_end (elf);
+ close (fd);
+
+ return 0;
+}
diff --git a/tests/run-eu-search-cfi.sh b/tests/run-eu-search-cfi.sh
new file mode 100755
index 00000000..e86232cc
--- /dev/null
+++ b/tests/run-eu-search-cfi.sh
@@ -0,0 +1,31 @@
+#! /bin/sh
+# Data race test for parallelized next_cfi
+# Copyright (C) 2015, 2018 Red Hat, Inc.
+# This file is part of elfutils.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# elfutils is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+. $srcdir/thread-safety-subr.sh
+
+check_thread_safety_enabled
+
+cfi_test_files=("testfile11" "testfile12"
+ "testfilearm" "testfileaarch64"
+ "testfileppc32" "testfileppc64")
+
+testfiles "${cfi_test_files[@]}"
+
+for file in "${cfi_test_files[@]}"; do
+ testrun ${abs_builddir}/eu_search_cfi $file
+done
--
2.48.1
