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Check address of versined symbol

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Since GCC 5 folds symbol address comparison, assuming each symbol has a
different address, &foo == &bar is always false for GCC 5.  This patch
adds check_ptr_eq if 2 addresses are the same and uses it to check the
address of versined symbol.

	PR ld/18718
	* ld-elf/check-ptr-eq.c: New file.
	* ld-elf/pr18718.c (main): Call check_ptr_eq.
	* ld-elf/shared.exp: Add check-ptr-eq.c to PR ld/18718 tests.
This commit is contained in:
H.J. Lu
2015-07-27 10:04:31 -07:00
parent 077836f7cf
commit c45bd4fd43
3 changed files with 19 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
ld/testsuite/ld-elf/check-ptr-eq.c Normal file
View File

@ -0,0 +1,12 @@
extern void abort (void);
/* Since GCC 5 folds symbol address comparison, assuming each symbol has
different address, &foo == &bar is always false for GCC 5. Use
check_ptr_eq to check if 2 addresses are the same. */
void
check_ptr_eq (void *p1, void *p2)
{
if (p1 != p2)
abort ();
}

2
ld/testsuite/ld-elf/pr18718.c
View File

@ -2,6 +2,7 @@
#include <bfd_stdint.h> #include <bfd_stdint.h>
extern void foo (void); extern void foo (void);
extern void check_ptr_eq (void *, void *);
void void
new_foo (void) new_foo (void)
@ -21,6 +22,7 @@ int
main(void) main(void)
{ {
bar (); bar ();
check_ptr_eq (&foo, &new_foo);
printf("PASS\n"); printf("PASS\n");
return 0; return 0;
} }

10
ld/testsuite/ld-elf/shared.exp
View File

@ -533,7 +533,7 @@ if { [istarget *-*-linux*]
"Run pr18718" \ "Run pr18718" \
"" \ "" \
"" \ "" \
{ pr18718.c } \ { pr18718.c check-ptr-eq.c } \
"pr18718" \ "pr18718" \
"pass.out" \ "pass.out" \
"-O2 -I../bfd" \ "-O2 -I../bfd" \
@ -542,7 +542,7 @@ if { [istarget *-*-linux*]
"Run pr18718 with PIE (1)" \ "Run pr18718 with PIE (1)" \
"-pie" \ "-pie" \
"" \ "" \
{ pr18718.c } \ { pr18718.c check-ptr-eq.c } \
"pr18718pie1" \ "pr18718pie1" \
"pass.out" \ "pass.out" \
"-O2 -fPIE -I../bfd" \ "-O2 -fPIE -I../bfd" \
@ -551,7 +551,7 @@ if { [istarget *-*-linux*]
"Run pr18718 with PIE (2)" \ "Run pr18718 with PIE (2)" \
"" \ "" \
"" \ "" \
{ pr18718.c } \ { pr18718.c check-ptr-eq.c } \
"pr18718pie2" \ "pr18718pie2" \
"pass.out" \ "pass.out" \
"-O2 -fPIE -I../bfd" \ "-O2 -fPIE -I../bfd" \
@ -560,7 +560,7 @@ if { [istarget *-*-linux*]
"Run pr18718 with PIC (1)" \ "Run pr18718 with PIC (1)" \
"" \ "" \
"" \ "" \
{ pr18718.c } \ { pr18718.c check-ptr-eq.c } \
"pr18718pic1" \ "pr18718pic1" \
"pass.out" \ "pass.out" \
"-O2 -fPIC -I../bfd" \ "-O2 -fPIC -I../bfd" \
@ -569,7 +569,7 @@ if { [istarget *-*-linux*]
"Run pr18718 with PIC (2)" \ "Run pr18718 with PIC (2)" \
"-pie" \ "-pie" \
"" \ "" \
{ pr18718.c } \ { pr18718.c check-ptr-eq.c } \
"pr18718pic2" \ "pr18718pic2" \
"pass.out" \ "pass.out" \
"-O2 -fPIC -I../bfd" \ "-O2 -fPIC -I../bfd" \