selftests/powerpc: Add ptrace tests for GPR/FPR registers in TM

This patch adds ptrace interface test for GPR/FPR registers
inside TM context. This adds ptrace interface based helper
functions related to checkpointed GPR/FPR access.

Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/tools/testing/selftests/powerpc/ptrace/.gitignore b/tools/testing/selftests/powerpc/ptrace/.gitignore
index 6e060041d7c8a714d21bf4da033814436d2d2864..4756bcdddc8a973f37a90ae111923a313431046a 100644 (file)
--- a/tools/testing/selftests/powerpc/ptrace/.gitignore
+++ b/tools/testing/selftests/powerpc/ptrace/.gitignore
@@ -1 +1,2 @@
-ptrace-gpr
\ No newline at end of file
+ptrace-gpr
+ptrace-tm-gpr
\ No newline at end of file

diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 110377268f6da5164bc90627917c7df53c020b9a..84f5de9a1b13339664a851934517d0325930b287 100644 (file)
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,10 +1,10 @@
-TEST_PROGS := ptrace-gpr
+TEST_PROGS := ptrace-gpr ptrace-tm-gpr
 
 include ../../lib.mk
 
 all: $(TEST_PROGS)
 
-CFLAGS += -m64 -I../../../../../usr/include
+CFLAGS += -m64 -I../../../../../usr/include -I../tm -mhtm
 
 $(TEST_PROGS): ../harness.c ../utils.c ../lib/reg.S ptrace.h
 

diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c
new file mode 100644 (file)
index 0000000..59206b9
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c
@@ -0,0 +1,158 @@
+/*
+ * Ptrace test for GPR/FPR registers in TM context
+ *
+ * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * 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
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-gpr.h"
+#include "tm.h"
+
+/* Tracer and Tracee Shared Data */
+int shm_id;
+unsigned long *cptr, *pptr;
+
+float a = FPR_1;
+float b = FPR_2;
+float c = FPR_3;
+
+void tm_gpr(void)
+{
+       unsigned long gpr_buf[18];
+       unsigned long result, texasr;
+       float fpr_buf[32];
+
+       printf("Starting the child\n");
+       cptr = (unsigned long *)shmat(shm_id, NULL, 0);
+
+trans:
+       cptr[1] = 0;
+       asm __volatile__(
+               ASM_LOAD_GPR_IMMED(gpr_1)
+               ASM_LOAD_FPR_SINGLE_PRECISION(flt_1)
+               "1: ;"
+               "tbegin.;"
+               "beq 2f;"
+               ASM_LOAD_GPR_IMMED(gpr_2)
+               ASM_LOAD_FPR_SINGLE_PRECISION(flt_2)
+               "tsuspend.;"
+               "li 7, 1;"
+               "stw 7, 0(%[cptr1]);"
+               "tresume.;"
+               "b .;"
+
+               "tend.;"
+               "li 0, 0;"
+               "ori %[res], 0, 0;"
+               "b 3f;"
+
+               /* Transaction abort handler */
+               "2: ;"
+               "li 0, 1;"
+               "ori %[res], 0, 0;"
+               "mfspr %[texasr], %[sprn_texasr];"
+
+               "3: ;"
+               : [res] "=r" (result), [texasr] "=r" (texasr)
+               : [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2),
+               [sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "r" (&a),
+               [flt_2] "r" (&b), [cptr1] "r" (&cptr[1])
+               : "memory", "r7", "r8", "r9", "r10",
+               "r11", "r12", "r13", "r14", "r15", "r16",
+               "r17", "r18", "r19", "r20", "r21", "r22",
+               "r23", "r24", "r25", "r26", "r27", "r28",
+               "r29", "r30", "r31"
+               );
+
+       if (result) {
+               if (!cptr[0])
+                       goto trans;
+
+               shmdt((void *)cptr);
+               store_gpr(gpr_buf);
+               store_fpr_single_precision(fpr_buf);
+
+               if (validate_gpr(gpr_buf, GPR_3))
+                       exit(1);
+
+               if (validate_fpr_float(fpr_buf, c))
+                       exit(1);
+
+               exit(0);
+       }
+       shmdt((void *)cptr);
+       exit(1);
+}
+
+int trace_tm_gpr(pid_t child)
+{
+       unsigned long gpr[18];
+       unsigned long fpr[32];
+
+       FAIL_IF(start_trace(child));
+       FAIL_IF(show_gpr(child, gpr));
+       FAIL_IF(validate_gpr(gpr, GPR_2));
+       FAIL_IF(show_fpr(child, fpr));
+       FAIL_IF(validate_fpr(fpr, FPR_2_REP));
+       FAIL_IF(show_ckpt_fpr(child, fpr));
+       FAIL_IF(validate_fpr(fpr, FPR_1_REP));
+       FAIL_IF(show_ckpt_gpr(child, gpr));
+       FAIL_IF(validate_gpr(gpr, GPR_1));
+       FAIL_IF(write_ckpt_gpr(child, GPR_3));
+       FAIL_IF(write_ckpt_fpr(child, FPR_3_REP));
+
+       pptr[0] = 1;
+       FAIL_IF(stop_trace(child));
+
+       return TEST_PASS;
+}
+
+int ptrace_tm_gpr(void)
+{
+       pid_t pid;
+       int ret, status;
+
+       SKIP_IF(!have_htm());
+       shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
+       pid = fork();
+       if (pid < 0) {
+               perror("fork() failed");
+               return TEST_FAIL;
+       }
+       if (pid == 0)
+               tm_gpr();
+
+       if (pid) {
+               pptr = (unsigned long *)shmat(shm_id, NULL, 0);
+
+               while (!pptr[1])
+                       asm volatile("" : : : "memory");
+               ret = trace_tm_gpr(pid);
+               if (ret) {
+                       kill(pid, SIGTERM);
+                       return TEST_FAIL;
+               }
+
+               shmdt((void *)pptr);
+
+               ret = wait(&status);
+               shmctl(shm_id, IPC_RMID, NULL);
+               if (ret != pid) {
+                       printf("Child's exit status not captured\n");
+                       return TEST_FAIL;
+               }
+
+               return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
+                       TEST_PASS;
+       }
+       return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+       return test_harness(ptrace_tm_gpr, "ptrace_tm_gpr");
+}