svn commit: r240156 - head/lib/libproc

[Rui Paulo]

Author: rpaulo
Date: Thu Sep  6 03:19:48 2012
New Revision: 240156
URL: http://svn.freebsd.org/changeset/base/240156

Log:
  Add support for demangling C++ symbols. This requires linking libproc with
  libc++rt/libsupc++.
  
  Discussed with:       theraven

Modified:
  head/lib/libproc/Makefile
  head/lib/libproc/proc_sym.c

Modified: head/lib/libproc/Makefile
==============================================================================
--- head/lib/libproc/Makefile   Thu Sep  6 02:07:58 2012        (r240155)
+++ head/lib/libproc/Makefile   Thu Sep  6 03:19:48 2012        (r240156)
@@ -1,5 +1,7 @@
 # $FreeBSD$
 
+.include <bsd.own.mk>
+
 LIB=   proc
 
 SRCS=  proc_bkpt.c             \
@@ -13,6 +15,14 @@ INCS=        libproc.h
 
 CFLAGS+=       -I${.CURDIR}
 
+.if ${MK_LIBCPLUSPLUS} != "no"
+LDADD+=                -lcxxrt
+DPADD+=                ${LIBCXXRT}
+.else
+LDADD+=                -lsupc++
+DPADD+=                ${LIBSTDCPLUSPLUS}
+.endif
+
 SHLIB_MAJOR=   2
 
 WITHOUT_MAN=

Modified: head/lib/libproc/proc_sym.c
==============================================================================
--- head/lib/libproc/proc_sym.c Thu Sep  6 02:07:58 2012        (r240155)
+++ head/lib/libproc/proc_sym.c Thu Sep  6 03:19:48 2012        (r240156)
@@ -46,6 +46,8 @@
 
 #include "_libproc.h"
 
+extern char *__cxa_demangle(const char *, char *, size_t *, int *);
+
 static void    proc_rdl2prmap(rd_loadobj_t *, prmap_t *);
 
 static void
@@ -266,7 +268,11 @@ proc_addr2sym(struct proc_handle *p, uin
                if (addr >= rsym && addr <= (rsym + sym.st_size)) {
                        s = elf_strptr(e, dynsymstridx, sym.st_name);
                        if (s) {
-                               strlcpy(name, s, namesz);
+                               if (strlen(s) > 2 && 
+                                   s[0] == '_' && s[1] == 'Z')
+                                       __cxa_demangle(s, name, &namesz, NULL);
+                               else
+                                       strlcpy(name, s, namesz);
                                memcpy(symcopy, &sym, sizeof(sym));
                                /*
                                 * DTrace expects the st_value to contain
@@ -302,7 +308,11 @@ symtab:
                if (addr >= rsym && addr <= (rsym + sym.st_size)) {
                        s = elf_strptr(e, symtabstridx, sym.st_name);
                        if (s) {
-                               strlcpy(name, s, namesz);
+                               if (strlen(s) > 2 && 
+                                   s[0] == '_' && s[1] == 'Z')
+                                       __cxa_demangle(s, name, &namesz, NULL);
+                               else
+                                       strlcpy(name, s, namesz);
                                memcpy(symcopy, &sym, sizeof(sym));
                                /*
                                 * DTrace expects the st_value to contain
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