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/* findfre-1.c -- Test for sframe_find_fre in libsframe.
Copyright (C) 2023-2025 Free Software Foundation, Inc.
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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "sframe-api.h"
/* DejaGnu should not use gnulib's vsnprintf replacement here. */
#undef vsnprintf
#include <dejagnu.h>
static int
add_fde1 (sframe_encoder_ctx *encode, uint32_t start_pc_vaddr,
uint32_t sframe_vaddr, int idx, uint32_t *func_size)
{
/* A contiguous block containing 4 FREs. */
#define FDE1_NUM_FRES 4
sframe_frame_row_entry fres[FDE1_NUM_FRES]
= { {0x0, {0x1, 0, 0}, 0x3},
{0x1, {0x2, 0xf0, 0}, 0x5},
{0x10, {0x3, 0xf0, 0}, 0x4},
{0x38, {0x8, 0xf0, 0}, 0x5}
};
/* Function size in bytes. P.S. Must be a value greater than the
fre_start_addr of the last FRE above (0x38). */
*func_size = 0x40;
uint32_t offsetof_fde_in_sec
= sframe_encoder_get_offsetof_fde_start_addr (encode, idx, NULL);
int32_t func1_start_addr = (start_pc_vaddr
- (sframe_vaddr + offsetof_fde_in_sec));
unsigned char finfo = sframe_fde_create_func_info (SFRAME_FRE_TYPE_ADDR1,
SFRAME_FDE_TYPE_PCINC);
int err = sframe_encoder_add_funcdesc (encode, func1_start_addr, *func_size,
finfo, FDE1_NUM_FRES);
if (err == -1)
return err;
for (unsigned int i = 0; i < FDE1_NUM_FRES; i++)
if (sframe_encoder_add_fre (encode, idx, fres + i) == SFRAME_ERR)
return -1;
return 0;
}
static int
add_fde2 (sframe_encoder_ctx *encode, uint32_t start_pc_vaddr,
uint32_t sframe_vaddr, int idx, uint32_t *func_size)
{
/* A contiguous block containing 4 FREs. */
#define FDE2_NUM_FRES 4
sframe_frame_row_entry fres[FDE2_NUM_FRES]
= { {0x0, {0x10, 0, 0}, 0x3},
{0x10, {0x12, 0xf0, 0}, 0x5},
{0x14, {0x14, 0xf0, 0}, 0x4},
{0x20, {0x15, 0xf0, 0}, 0x5}
};
/* Function size in bytes. P.S. Must be a value greater than the
fre_start_addr of the last FRE above (0x20). */
*func_size = 0x60;
uint32_t offsetof_fde_in_sec
= sframe_encoder_get_offsetof_fde_start_addr (encode, idx, NULL);
int32_t func2_start_addr = (start_pc_vaddr
- (sframe_vaddr + offsetof_fde_in_sec));
unsigned char finfo = sframe_fde_create_func_info (SFRAME_FRE_TYPE_ADDR1,
SFRAME_FDE_TYPE_PCINC);
int err = sframe_encoder_add_funcdesc (encode, func2_start_addr, *func_size,
finfo, FDE2_NUM_FRES);
if (err == -1)
return err;
for (unsigned int i = 0; i < FDE2_NUM_FRES; i++)
if (sframe_encoder_add_fre (encode, idx, fres + i) == SFRAME_ERR)
return -1;
return 0;
}
static
void test_text_findfre (uint32_t text_vaddr, uint32_t sframe_vaddr)
{
sframe_encoder_ctx *encode;
sframe_decoder_ctx *dctx;
sframe_frame_row_entry frep;
uint32_t func1_start_vaddr;
uint32_t func2_start_vaddr;
uint32_t func1_size = 0;
uint32_t func2_size = 0;
uint32_t fde_cnt = 0;
int32_t lookup_pc;
char *sframe_buf;
size_t sf_size;
int err = 0;
#define TEST(name, cond) \
do \
{ \
if (cond) \
pass (name); \
else \
fail (name); \
} \
while (0)
encode = sframe_encode (SFRAME_VERSION,
SFRAME_F_FDE_FUNC_START_PCREL,
SFRAME_ABI_AMD64_ENDIAN_LITTLE,
SFRAME_CFA_FIXED_FP_INVALID,
-8, /* Fixed RA offset for AMD64. */
&err);
func1_start_vaddr = text_vaddr;
err = add_fde1 (encode, func1_start_vaddr, sframe_vaddr, 0, &func1_size);
TEST ("findfre-1: Adding FDE1", err == 0);
/* Function 2 is placed after 0x10 bytes from the end of Function 1. */
func2_start_vaddr = func1_start_vaddr + func1_size + 0x10;
err = add_fde2 (encode, func2_start_vaddr, sframe_vaddr, 1, &func2_size);
TEST ("findfre-1: Adding FDE2", err == 0);
fde_cnt = sframe_encoder_get_num_fidx (encode);
TEST ("findfre-1: Test FDE count", fde_cnt == 2);
sframe_buf = sframe_encoder_write (encode, &sf_size, &err);
TEST ("findfre-1: Encoder write", err == 0);
dctx = sframe_decode (sframe_buf, sf_size, &err);
TEST ("findfre-1: Decoder setup", dctx != NULL);
/* Find the third FRE in first FDE. */
lookup_pc = func1_start_vaddr + 0x15 - sframe_vaddr;
err = sframe_find_fre (dctx, lookup_pc, &frep);
TEST ("findfre-1: Find third FRE",
(err == 0 && sframe_fre_get_cfa_offset (dctx, &frep, &err) == 0x3));
/* Find an FRE for PC at the end of range covered by FRE. */
lookup_pc = func1_start_vaddr + 0x9 - sframe_vaddr;
err = sframe_find_fre (dctx, lookup_pc, &frep);
TEST ("findfre-1: Find FRE for last PC covered by FRE",
(err == 0 && sframe_fre_get_cfa_offset (dctx, &frep, &err) == 0x2));
/* Find the last FRE in first FDE. */
lookup_pc = func1_start_vaddr + 0x39 - sframe_vaddr;
err = sframe_find_fre (dctx, lookup_pc, &frep);
TEST ("findfre-1: Find last FRE",
(err == 0 && sframe_fre_get_cfa_offset (dctx, &frep, &err) == 0x8));
/* Find the second FRE in second FDE. */
lookup_pc = func2_start_vaddr + 0x11 - sframe_vaddr;
err = sframe_find_fre (dctx, lookup_pc, &frep);
TEST ("findfre-1: Find second FRE",
(err == 0 && sframe_fre_get_cfa_offset (dctx, &frep, &err) == 0x12));
/* Find the first FRE in second FDE. */
lookup_pc = func2_start_vaddr + 0x0 - sframe_vaddr;
err = sframe_find_fre (dctx, lookup_pc, &frep);
TEST ("findfre-1: Find first FRE",
(err == 0 && sframe_fre_get_cfa_offset (dctx, &frep, &err) == 0x10));
/* Find FRE for PC out of range. Expect error code. */
lookup_pc = func1_start_vaddr + func1_size - sframe_vaddr;
err = sframe_find_fre (dctx, lookup_pc, &frep);
TEST ("findfre-1: Find FRE for out of range PC", err == SFRAME_ERR);
sframe_encoder_free (&encode);
sframe_decoder_free (&dctx);
}
int main (void)
{
uint32_t sframe_vaddr = 0x402220;
uint32_t text_vaddr = 0x401020;
printf ("Testing with text_vaddr = %#x; sframe_vaddr = %#x\n", text_vaddr,
sframe_vaddr);
test_text_findfre (text_vaddr, sframe_vaddr);
sframe_vaddr = 0x401020;
text_vaddr = 0x402220;
printf ("Testing with text_vaddr = %#x; sframe_vaddr = %#x\n", text_vaddr,
sframe_vaddr);
test_text_findfre (text_vaddr, sframe_vaddr);
}
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