libopal-dbg 和 libopal3.10.10 已安装。但是调试的时候看不到库代码。
objdump --debugging/usr/lib/libopal.so.3.10.10 给出:
00000018 0000000000000024 0000001c FDE cie=00000000 pc=00000000006a61c0..00000000006f82b0
DW_CFA_def_cfa_offset: 16
DW_CFA_advance_loc: 6 to 00000000006a61c6
DW_CFA_def_cfa_offset: 24
DW_CFA_advance_loc: 10 to 00000000006a61d0
DW_CFA_def_cfa_expression (DW_OP_breg7 (rsp): 8; DW_OP_breg16 (rip): 0; DW_OP_lit15; DW_OP_and; DW_OP_lit11; DW_OP_ge; DW_OP_lit3; DW_OP_shl; DW_OP_plus)
DW_CFA_nop
DW_CFA_nop
DW_CFA_nop
DW_CFA_nop
...
有趣的是 objdump --debugging/usr/lib/debug/usr/lib/libopal.so.3.10.10 什么都不输出:
/usr/lib/debug/usr/lib/libopal.so.3.10.10: file format elf64-x86-64
Contents of the .eh_frame section:
00000000 ZERO terminator
调试时，没有给出行号:
(gdb) n
Single stepping until exit from function _ZN12RTP_Encoding10WaitForPDUER10PUDPSocketS1_RK13PTimeInterval,
which has no line number information.
0x00007ffff5d73641 in RTP_UDP::WaitForPDU(PUDPSocket&, PUDPSocket&, PTimeInterval const&) () from /usr/lib/libopal.so.3.10.10
(gdb) list
77 in ../sysdeps/unix/syscall-template.S
(gdb) n
Single stepping until exit from function _ZN7RTP_UDP10WaitForPDUER10PUDPSocketS1_RK13PTimeInterval,
which has no line number information.
0x00007ffff5d731e3 in RTP_UDP::Internal_ReadData(RTP_DataFrame&) () from /usr/lib/libopal.so.3.10.10
或者像在 ptlib 中那样(还安装了 libpt-dbg 和 libpt-1.10.10):
(gdb)
0x00007ffff52922c0 in PSocket::Select(PSocket::SelectList&, PSocket::SelectList&, PSocket::SelectList&, PTimeInterval const&) () from /usr/lib/libpt.so.2.10.10
(gdb)
Single stepping until exit from function _ZN7PSocket6SelectERNS_10SelectListES1_S1_RK13PTimeInterval,
which has no line number information.
0x00007ffff52bc0e9 in PSocket::Select(PSocket&, PSocket&, PTimeInterval const&) () from /usr/lib/libpt.so.2.10.10
(gdb) lis
2946 in malloc.c
(gdb) s
Single stepping until exit from function _ZN7PSocket6SelectERS_S0_RK13PTimeInterval,
which has no line number information.
0x00007ffff5d736b7 in RTP_UDP::Internal_WaitForPDU(PUDPSocket&, PUDPSocket&, PTimeInterval const&) () from /usr/lib/libopal.so.3.10.10
(gdb) lis
2946 in malloc.c
最佳答案
好的，今天交易以下黑客:
执行apt-get source libpt-dbg，并修补debian/rules:
--- a/debian/rules 2016-03-23 14:25:56.067355795 +0100
+++ b/debian/rules 2016-03-23 11:53:11.384111449 +0100
@@ -23,7 +23,7 @@
dh_auto_configure -- --enable-oss --enable-v4l --disable-avc --disable-dc --enable-exceptions
override_dh_auto_build:
- dh_auto_build -- optshared docs
+ dh_auto_build -- debugshared docs
override_dh_strip:
dh_strip -a --dbg-package=libpt-dbg
@@ -35,7 +35,7 @@
override_dh_auto_test:
$(MAKE) PTLIBDIR=$(CURDIR) -C samples/hello_world clean
- $(MAKE) PTLIBDIR=$(CURDIR) -C samples/hello_world opt
+ $(MAKE) PTLIBDIR=$(CURDIR) -C samples/hello_world debug
#if (samples/hello_world/obj*/hello 2>/dev/null);then \
# echo opt hello_world sample incorrectly compiled static; false ; \
#else \
同时将实际源代码的补丁添加到补丁中(导入或更新 debian/patches 目录):
Index: ptlib-2.10.10~dfsg/Makefile.in
===================================================================
--- ptlib-2.10.10~dfsg.orig/Makefile.in
+++ ptlib-2.10.10~dfsg/Makefile.in
@@ -83,7 +83,7 @@ ifeq (,$(findstring $(OSTYPE),Darwin cyg
DEBUG_SONAME = $(PTLIB_DEBUG_FILE).@MAJOR_VERSION@.@MINOR_VERSION@@BUILD_TYPE@@BUILD_NUMBER@
else
LIB_SONAME = $(subst .$(LIB_SUFFIX),.@MAJOR_VERSION@.@MINOR_VERSION@@BUILD_TYPE@@BUILD_NUMBER@.$(LIB_SUFFIX),$(PTLIB_FILE))
- DEBUG_SONAME = $(subst .$(LIB_SUFFIX),.@MAJOR_VERSION@.@MINOR_VERSION@@BUILD_TYPE@@BUILD_NUMBER@._d$(LIB_SUFFIX),$(PTLIB_FILE))
+ DEBUG_SONAME = $(subst .$(LIB_SUFFIX),.@MAJOR_VERSION@.@MINOR_VERSION@@BUILD_TYPE@@BUILD_NUMBER@.$(LIB_SUFFIX),$(PTLIB_FILE))
endif
# all these targets are just passed to all subdirectories
Index: ptlib-2.10.10~dfsg/make/unix.mak
===================================================================
--- ptlib-2.10.10~dfsg.orig/make/unix.mak
+++ ptlib-2.10.10~dfsg/make/unix.mak
@@ -596,7 +596,7 @@ endif
ifndef OBJ_SUFFIX
ifdef DEBUG
-OBJ_SUFFIX := _d
+OBJ_SUFFIX :=
else
OBJ_SUFFIX :=
endif # DEBUG
@@ -663,7 +663,7 @@ PT_LIBDIR = $(PTLIBDIR)/lib_$(PLATFORM_T
# set name of the PT library
PTLIB_BASE = pt$(OBJ_SUFFIX)
PTLIB_FILE = lib$(PTLIB_BASE)$(LIB_TYPE).$(LIB_SUFFIX)
-PTLIB_DEBUG_FILE= lib$(PTLIB_BASE)_d$(LIB_TYPE).$(LIB_SUFFIX)
+PTLIB_DEBUG_FILE= lib$(PTLIB_BASE)$(LIB_TYPE).$(LIB_SUFFIX)
PT_OBJBASE = obj$(OBJDIR_SUFFIX)
PT_OBJDIR = $(PT_LIBDIR)/$(PT_OBJBASE)
然后使用 debuild -us -uc -i -I 构建包。
接下来是蛋白石(apt-get source libopal-dbg)。修补 debian/rules:
--- a/debian/rules 2016-03-23 15:55:49.460972494 +0100
+++ b/debian/rules 2016-03-23 15:24:37.685361838 +0100
@@ -23,7 +23,7 @@
override_dh_auto_build:
sed -e 's#^Libs: #Libs: -L$(OPAL_LIBDIR) #' opal.pc >samples/opal.pc
- dh_auto_build -- PKG_CONFIG_PATH=$(CURDIR)/samples VERBOSE=1 opt docs
+ dh_auto_build -- PKG_CONFIG_PATH=$(CURDIR)/samples VERBOSE=1 debug docs
#override_dh_auto_test:
# if (samples/simple/obj*/simpleopal --help >/dev/null);then \
将补丁添加到源补丁目录:
Index: opal-3.10.10~dfsg2/Makefile.in
===================================================================
--- opal-3.10.10~dfsg2.orig/Makefile.in
+++ opal-3.10.10~dfsg2/Makefile.in
@@ -560,7 +560,7 @@ $(OPAL_DEPDIR)/%.dep : %.c
.PHONY: default_target
ifeq ($(OPAL_SHARED_LIB),)
-default_target :: opt
+default_target :: debug
else
default_target :: Makefile $(OPAL_LIBDIR)/$(LIB_FILENAME_STATIC)
ifeq ($(OPAL_SHARED_LIB),1)
Index: opal-3.10.10~dfsg2/configure
===================================================================
--- opal-3.10.10~dfsg2.orig/configure
+++ opal-3.10.10~dfsg2/configure
@@ -4919,7 +4919,7 @@ fi
PTLIB_LIBS=`$PKG_CONFIG ptlib --libs`
RELEASE_LIBS=`$PKG_CONFIG ptlib --libs`
- DEBUG_LIBS=`$PKG_CONFIG ptlib --define-variable=suffix=_d --libs`
+ DEBUG_LIBS=`$PKG_CONFIG ptlib --libs`
else
if test "x${PTLIB_VERSION_CHECK}" = "xyes" ; then
@@ -5113,7 +5113,7 @@ fi
PTLIB_VERSION=`$PKG_CONFIG ptlib --modversion`
PTLIB_CXXFLAGS=`$PKG_CONFIG ptlib --variable=cxxflags`
- DEBUG_LIBS=`$PKG_CONFIG ptlib --define-variable=suffix=_d --libs`
+ DEBUG_LIBS=`$PKG_CONFIG ptlib --libs`
RELEASE_LIBS="$PTLIB_LIBS"
fi
@@ -5133,7 +5133,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking linkable PTLib" >&5
$as_echo_n "checking linkable PTLib... " >&6; }
- DEBUG_LIBS=`$PKG_CONFIG ptlib --define-variable=suffix=_d --libs`
+ DEBUG_LIBS=`$PKG_CONFIG ptlib --libs`
RELEASE_LIBS=`$PKG_CONFIG ptlib --libs`
suffix=""""""
@@ -5174,7 +5174,7 @@ rm -f core conftest.err conftest.$ac_obj
$as_echo "opt, shared" >&6; }
else
- suffix="_d"""
+ suffix=""""
if test "x$suffix" = "x" ; then
LIBS=`$PKG_CONFIG ptlib "" --libs`
else
@@ -5211,7 +5211,7 @@ rm -f core conftest.err conftest.$ac_obj
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: debug, shared" >&5
$as_echo "debug, shared" >&6; }
else
- DEBUG_LIBS=`$PKG_CONFIG ptlib --static --define-variable=suffix=_d_s --libs`
+ DEBUG_LIBS=`$PKG_CONFIG ptlib --static --define-variable=suffix=_s --libs`
RELEASE_LIBS=`$PKG_CONFIG ptlib --static --define-variable=suffix=_s --libs`
suffix="""_s"
@@ -5252,7 +5252,7 @@ rm -f core conftest.err conftest.$ac_obj
$as_echo "release, static" >&6; }
else
- suffix="_d_s"
+ suffix="_s"
if test "x$suffix" = "x" ; then
LIBS=`$PKG_CONFIG ptlib --static --libs`
else
@@ -5362,7 +5362,7 @@ case "$OSTYPE" in
SHARED_CFLAGS="-KPIC -D__inline=inline"
if test "xDEBUG" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
@@ -5396,7 +5396,7 @@ case "$OSTYPE" in
if test "xRELEASE" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
@@ -5438,7 +5438,7 @@ case "$OSTYPE" in
SHARED_CFLAGS="-fPIC"
if test "xDEBUG" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
@@ -5472,7 +5472,7 @@ case "$OSTYPE" in
if test "xRELEASE" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
@@ -5521,7 +5521,7 @@ case "$OSTYPE" in
SHARED_CFLAGS=
if test "xDEBUG" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
@@ -5555,7 +5555,7 @@ case "$OSTYPE" in
if test "xRELEASE" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
@@ -5596,7 +5596,7 @@ case "$OSTYPE" in
SHARED_CFLAGS="-fPIC"
if test "xDEBUG" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
@@ -5630,7 +5630,7 @@ case "$OSTYPE" in
if test "xRELEASE" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
@@ -5672,7 +5672,7 @@ case "$OSTYPE" in
SHARED_CFLAGS="-fPIC"
if test "xDEBUG" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
@@ -5706,7 +5706,7 @@ case "$OSTYPE" in
if test "xRELEASE" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
Index: opal-3.10.10~dfsg2/opal.m4
===================================================================
--- opal-3.10.10~dfsg2.orig/opal.m4
+++ opal-3.10.10~dfsg2/opal.m4
@@ -154,7 +154,7 @@ dnl $LIB_FILENAME_SHARED_PAT
AC_DEFUN([OPAL_DETERMINE_LIBNAMES],
[
if test "x$1" = "xDEBUG" ; then
- OBJ_SUFFIX="_d"
+ OBJ_SUFFIX=""
else
OBJ_SUFFIX=""
fi
Index: opal-3.10.10~dfsg2/samples/simple/Makefile
===================================================================
--- opal-3.10.10~dfsg2.orig/samples/simple/Makefile
+++ opal-3.10.10~dfsg2/samples/simple/Makefile
@@ -35,7 +35,7 @@ endif
# Determine which package to use debug or release
ifeq ($(DEBUG_BUILD), yes)
-DEBUG_SUFFIX=_d
+DEBUG_SUFFIX=
CFLAGS += -g
else
DEBUG_SUFFIX=
使用 debuild -us -uc -i -I 构建包。
关于linux - 如何让 gdb 从已安装的库中加载符号？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36172421/