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# Copyright 2012-2020 Free Software Foundation, Inc.
# This program 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.
#
# This program 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/>.
# Test re-running an inferior with a JIT descriptor, where the JIT
# descriptor changes address between runs.
# http://sourceware.org/bugzilla/show_bug.cgi?id=13431
# Test both the case of the JIT reader being included in the main
# program directly, and the case of the JIT reader being split out to
# a shared library.
# For completeness, also test when the JIT descriptor does not change
# address between runs.
if {[skip_shlib_tests]} {
untested "skipping shared library tests"
return -1
}
standard_testfile
set libname $testfile-jit
set srcfile_lib $srcdir/$subdir/$libname.c
set binfile_lib [standard_output_file $libname.so]
# Build a standalone JIT binary.
proc build_standalone_jit {{options ""}} {
global testfile srcfile binfile
lappend options "debug"
if {[build_executable $testfile.exp $testfile $srcfile $options] == -1} {
return -1
}
return 0
}
# Build the shared library JIT.
proc build_shared_jit {{options ""}} {
global testfile
global srcfile_lib binfile_lib
lappend options "debug additional_flags=-fPIC"
if { [gdb_compile_shlib $srcfile_lib $binfile_lib $options] != "" } {
return -1
}
return 0
}
if {[build_standalone_jit] == -1} {
untested "failed to compile standalone testcase"
return
}
if {[build_shared_jit] == -1} {
untested "failed to compile shared library testcase"
return
}
# Build the program that loads the JIT library.
set srcfile_dl $testfile-dl.c
set binfile_dl $binfile-dl
set options [list debug shlib=${binfile_lib}]
if {[gdb_compile ${srcdir}/${subdir}/${srcfile_dl} $binfile_dl executable \
$options] == -1 } {
untested "failed to compile"
return -1
}
# STANDALONE is true when the JIT reader is included directly in the
# main program. False when the JIT reader is in a separate shared
# library. If CHANGE_ADDR is true, force changing the JIT descriptor
# changes address between runs.
proc jit_test_reread {standalone change_addr} {
global testfile binfile subdir srcfile srcdir binfile_lib binfile_dl
global hex
with_test_prefix "initial run" {
if {$standalone} {
clean_restart $binfile
} else {
clean_restart $binfile_dl
}
runto_main
set addr_before [get_hexadecimal_valueof "&__jit_debug_descriptor" 0 \
"get address of __jit_debug_descriptor"]
gdb_test "maint info breakpoints" \
"jit events keep y $hex <__jit_debug_register_code>.*" \
"maint info breakpoints shows jit breakpoint"
}
with_test_prefix "second run" {
# Ensure that the new executable is at least one second newer
# than the old. If the recompilation happens in the same
# second, gdb might not reload the executable automatically.
sleep 1
if ${change_addr} {
set options "additional_flags=-DSPACER"
if {$standalone} {
gdb_rename_execfile $binfile ${binfile}x
set res [build_standalone_jit $options]
} else {
gdb_rename_execfile $binfile_lib ${binfile_lib}x
set res [build_shared_jit $options]
}
if { $res == -1 } {
fail "recompile"
return
} else {
pass "recompile"
}
}
runto_main
set addr_after [get_hexadecimal_valueof "&__jit_debug_descriptor" 0 \
"get address of __jit_debug_descriptor"]
# This used to crash in the JIT-in-shared-library case:
# https://sourceware.org/bugzilla/show_bug.cgi?id=11094
gdb_test "maint info breakpoints" \
"jit events keep y $hex <__jit_debug_register_code>.*" \
"maint info breakpoints shows jit breakpoint"
}
if ${change_addr} {
gdb_assert {$addr_before != $addr_after} "address changed"
} else {
gdb_assert {$addr_before == $addr_after} "address didn't change"
}
}
foreach standalone {1 0} {
with_test_prefix [expr ($standalone)?"standalone":"shared"] {
with_test_prefix "change addr" {
jit_test_reread $standalone 1
}
with_test_prefix "same addr" {
jit_test_reread $standalone 0
}
}
}
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