| # Copyright (C) 2009-2012 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/>. |
| |
| if {[skip_shlib_tests]} { |
| return 0 |
| } |
| |
| set testfile "gnu-ifunc" |
| set executable ${testfile} |
| set srcfile ${testfile}.c |
| set binfile ${objdir}/${subdir}/${executable} |
| set staticexecutable ${executable}-static |
| set staticbinfile ${objdir}/${subdir}/${staticexecutable} |
| |
| set libfile "${testfile}-lib" |
| set libsrc ${libfile}.c |
| set lib_so ${objdir}/${subdir}/${libfile}.so |
| # $lib_o must not have {debug}, it would override the STT_GNU_IFUNC ELF markers. |
| set lib_o ${objdir}/${subdir}/${libfile}.o |
| |
| # We need DWARF for the "final" function as we "step" into the function and GDB |
| # would step-over the "final" function if there would be no line number debug |
| # information (DWARF) available. |
| # |
| # We must not have DWARF for the "gnu_ifunc" function as DWARF has no way to |
| # express the STT_GNU_IFUNC type and it would be considered as a regular |
| # function due to DWARF by GDB. In ELF gnu-ifunc is expressed by the |
| # STT_GNU_IFUNC type. |
| # |
| # Both functions need to be in the same shared library file but |
| # gdb_compile_shlib has no way to specify source-specific compilation options. |
| # |
| # Therefore $libfile contains only the STT_GNU_IFUNC function with no DWARF |
| # referencing all the other parts from the main executable with DWARF. |
| |
| set lib_opts {} |
| set exec_opts [list debug shlib=$lib_so] |
| |
| if [get_compiler_info ${binfile}] { |
| return -1 |
| } |
| |
| if { [gdb_compile_shlib ${srcdir}/${subdir}/$libsrc $lib_so $lib_opts] != "" |
| || [gdb_compile ${srcdir}/${subdir}/$srcfile $binfile executable $exec_opts] != ""} { |
| untested "Could not compile dynamic executable $binfile." |
| return -1 |
| } |
| |
| # Start with a fresh gdb. |
| |
| clean_restart $executable |
| gdb_load_shlibs ${lib_so} |
| |
| if ![runto_main] then { |
| fail "Can't run to main" |
| return 1; |
| } |
| |
| # The "if" condition is artifical to test regression of a former patch. |
| gdb_breakpoint "[gdb_get_line_number "break-at-nextcall"] if i && gnu_ifunc (i) != 42" |
| |
| gdb_breakpoint [gdb_get_line_number "break-at-call"] |
| gdb_continue_to_breakpoint "break-at-call" ".*break-at-call.*" |
| |
| # Test GDB will automatically indirect the call. |
| |
| gdb_test "p gnu_ifunc (3)" " = 4" |
| |
| # Test GDB will skip the gnu_ifunc resolver on first call. |
| |
| gdb_test "step" "\r\nfinal .*" |
| |
| # Test GDB will not break before the final chosen implementation. |
| |
| # Also test a former patch regression: |
| # Continuing. |
| # Error in testing breakpoint condition: |
| # Attempt to take address of value not located in memory. |
| # |
| # Breakpoint 2, main () at ./gdb.base/gnu-ifunc.c:33 |
| |
| gdb_test "continue" "Continuing.\r\n\r\nBreakpoint .* (at|in) .*break-at-nextcall.*" \ |
| "continue to break-at-nextcall" |
| |
| gdb_breakpoint "gnu_ifunc" |
| |
| gdb_continue_to_breakpoint "nextcall gnu_ifunc" |
| |
| gdb_test "frame" "#0 +(0x\[0-9a-f\]+ in +)?final \\(.*" "nextcall gnu_ifunc skipped" |
| |
| |
| # Check any commands not doing an inferior call access the address of the |
| # STT_GNU_IFUNC resolver, not the target function. |
| |
| if {[istarget powerpc64-*] && [is_lp64_target]} { |
| # With only minimal symbols GDB provides the function descriptors. With |
| # full debug info the function code would be displayed. |
| set func_prefix {\.} |
| } else { |
| set func_prefix {} |
| } |
| |
| gdb_test "p gnu_ifunc" " = {<text gnu-indirect-function variable, no debug info>} 0x\[0-9a-f\]+ <${func_prefix}gnu_ifunc>" "p gnu_ifunc executing" |
| gdb_test "info sym gnu_ifunc" "gnu_ifunc in section .*" "info sym gnu_ifunc executing" |
| |
| set test "info addr gnu_ifunc" |
| gdb_test_multiple $test $test { |
| -re "Symbol \"gnu_ifunc\" is at (0x\[0-9a-f\]+) in .*$gdb_prompt $" { |
| pass $test |
| } |
| } |
| gdb_test "info sym $expect_out(1,string)" "gnu_ifunc in section .*" "info sym <gnu_ifunc-address>" |
| |
| |
| # Test statically linked ifunc resolving during inferior start. |
| # https://bugzilla.redhat.com/show_bug.cgi?id=624967 |
| |
| # Compile $staticbinfile separately as it may exit on error (ld/12595). |
| |
| if { [gdb_compile ${srcdir}/${subdir}/$libsrc $lib_o object {}] != "" |
| || [gdb_compile "${srcdir}/${subdir}/$srcfile $lib_o" $staticbinfile executable {debug}] != "" } { |
| untested "Could not compile static executable $staticbinfile." |
| return -1 |
| } |
| |
| clean_restart $staticexecutable |
| |
| gdb_breakpoint "gnu_ifunc" |
| gdb_breakpoint "main" |
| gdb_run_cmd |
| gdb_test "" "Breakpoint \[0-9\]*, main .*" "static gnu_ifunc" |