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* [gcc r12-8164] Refactor and update CTF testcases [PR105089]
@ 2022-04-14 17:37 Indu Bhagat
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From: Indu Bhagat @ 2022-04-14 17:37 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:d634c5d7c78c6ec0fa39d96984460475564519c8
commit r12-8164-gd634c5d7c78c6ec0fa39d96984460475564519c8
Author: Indu Bhagat <indu.bhagat@oracle.com>
Date: Thu Apr 14 10:02:45 2022 -0700
Refactor and update CTF testcases [PR105089]
This commit splits the ctf-array-2.c into ctf-array-5.c and
ctf-variables.c with the following responsibilities:
[1] ctf-array-2.c: Test CTF generation for unsized arrays.
[2] ctf-array-5.c: Test CTF generation for unsized but initialized array.
[3] ctf-variables-3.c: Test CTF generation for extern variable with defining
decl.
Earlier all three tests above were being done in ctf-array-2.c. The
checks around [3] were very loose in the original version of ctf-array-2.c
in that the testcase was only checking that the types are as expected. The
compiler was emitting two CTF variable records as follows:
Variables:
_CTF_NEWSTR -> 5: const const char [0] (size 0x0) -> 4: const char [0] (size 0x0)
_CTF_NEWSTR -> 8: const const char [8] (size 0x8) -> 7: const char [8] (size 0x8)
This is incorrect behaviour as it creates ambiguity. The testcase
ctf-variables-3.c now has added checks that only one CTF variable record
is expected.
2022-04-14 Indu Bhagat <indu.bhagat@oracle.com>
gcc/testsuite/ChangeLog:
PR debug/105089
* gcc.dg/debug/ctf/ctf-array-2.c: Refactor testcase. Move some
checks ...
* gcc.dg/debug/ctf/ctf-array-5.c: ... to here.
* gcc.dg/debug/ctf/ctf-variables-3.c: ... and here. Add
additional checks for one CTF variable and one CTF object info
record.
Diff:
---
gcc/testsuite/gcc.dg/debug/ctf/ctf-array-2.c | 22 +++++++---------------
gcc/testsuite/gcc.dg/debug/ctf/ctf-array-5.c | 17 +++++++++++++++++
gcc/testsuite/gcc.dg/debug/ctf/ctf-variables-3.c | 22 ++++++++++++++++++++++
3 files changed, 46 insertions(+), 15 deletions(-)
diff --git a/gcc/testsuite/gcc.dg/debug/ctf/ctf-array-2.c b/gcc/testsuite/gcc.dg/debug/ctf/ctf-array-2.c
index 2a19da050fe..4721c4fb2f9 100644
--- a/gcc/testsuite/gcc.dg/debug/ctf/ctf-array-2.c
+++ b/gcc/testsuite/gcc.dg/debug/ctf/ctf-array-2.c
@@ -5,34 +5,26 @@
TBD_CTF_FORMAT_OPEN_ISSUES (1) -
This testcase makes a note of the case of a probable misrepresentation.
- See Note 1 and Note 2 below.
+ See Note 1 below.
In the CTF section, these types are encoded as :
Variables:
- _CTF_NEWSTR -> 7: const char [0] (size 0x0)
- _CTF_SECTION -> 6: const char [5] (size 0x5)
- b1 -> 2: int [0] (size 0x0)
- b2 -> 3: int [0] (size 0x0)
+ b1 -> 3: int [0] (size 0x0)
+ b2 -> 5: int [0] (size 0x0)
Note 1 : There is misrepresentation in that b1 and b2 are specified
differently by the user.
- Note 2 : It is arguable though whether the representation for
- _CTF_NEWSTR is incorrect. */
+
+ In this testcase, two CTF array records each of type int [0] is expected. */
/* { dg-do compile ) */
/* { dg-options "-O0 -gctf -dA" } */
-/* { dg-final { scan-assembler-times "0x12000000\[\t \]+\[^\n\]*ctt_info" 5 } } */
+/* { dg-final { scan-assembler-times "0x12000000\[\t \]+\[^\n\]*ctt_info" 2 } } */
-/* { dg-final { scan-assembler-times "\[\t \]0\[\t \]+\[^\n\]*cta_nelems" 3 } } */
-/* { dg-final { scan-assembler-times "\[\t \]0x5\[\t \]+\[^\n\]*cta_nelems" 1 } } */
+/* { dg-final { scan-assembler-times "\[\t \]0\[\t \]+\[^\n\]*cta_nelems" 2 } } */
static int b1[] = {};
int b2[0];
-
-const char _CTF_SECTION[] = ".ctf";
-
-extern const char _CTF_NEWSTR[];
-const char _CTF_NEWSTR[] = "ctfinfo";
diff --git a/gcc/testsuite/gcc.dg/debug/ctf/ctf-array-5.c b/gcc/testsuite/gcc.dg/debug/ctf/ctf-array-5.c
new file mode 100644
index 00000000000..ec504412ef5
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/debug/ctf/ctf-array-5.c
@@ -0,0 +1,17 @@
+/* CTF generation for unsized (but initialized) arrays
+
+ In this testcase, one CTF array type record of size 5 is expected.
+
+ Variables:
+ _CTF_SECTION -> 5: const const char [5] (size 0x5) -> 4: const char [5] (size 0x5)
+
+*/
+
+/* { dg-do compile ) */
+/* { dg-options "-O0 -gctf -dA" } */
+
+/* { dg-final { scan-assembler-times "0x12000000\[\t \]+\[^\n\]*ctt_info" 1 } } */
+
+/* { dg-final { scan-assembler-times "\[\t \]0x5\[\t \]+\[^\n\]*cta_nelems" 1 } } */
+
+const char _CTF_SECTION[] = ".ctf";
diff --git a/gcc/testsuite/gcc.dg/debug/ctf/ctf-variables-3.c b/gcc/testsuite/gcc.dg/debug/ctf/ctf-variables-3.c
new file mode 100644
index 00000000000..8aea1e82749
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/debug/ctf/ctf-variables-3.c
@@ -0,0 +1,22 @@
+/* CTF generation for extern variable with defining and non-defining decl
+ in the same CU.
+
+ This testcase checks the case when a non-defining decl is followed by
+ a defining decl for the same variable. See PR debug/105089.
+
+ In this testcase, although two CTF array types are generated, only a
+ single CTF variable and a single entry in the CTF object info section
+ are expected. */
+
+/* { dg-do compile ) */
+/* { dg-options "-O0 -gctf -dA" } */
+
+/* { dg-final { scan-assembler-times "0x12000000\[\t \]+\[^\n\]*ctt_info" 2 } } */
+
+/* { dg-final { scan-assembler-times "\[\t \]0\[\t \]+\[^\n\]*cta_nelems" 1 } } */
+/* { dg-final { scan-assembler-times "\[\t \]0x8\[\t \]+\[^\n\]*cta_nelems" 1 } } */
+/* { dg-final { scan-assembler-times "ctv_name" 1 } } */
+/* { dg-final { scan-assembler-times "objtinfo_var_type" 1 } } */
+
+extern const char _CTF_NEWSTR[];
+const char _CTF_NEWSTR[] = "ctfinfo";
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