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/* findfunc-1.c -- Test for sframe_get_funcdesc_with_addr in libsframe.
Copyright (C) 2023-2024 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/>. */
/* sframe_get_funcdesc_with_addr is a core API in the libsframe library, which
is used to find an FDE given a PC. It is used by sframe_find_fre (). The
latter is the mainstay for an SFrame based stack tracer.
The tests in here stress the sframe_get_funcdesc_with_addr API via calls to
the sframe_find_fre (). */
#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, int idx)
{
int i, err;
/* A contiguous block containing 4 FREs. */
sframe_frame_row_entry fres[]
= { {0x0, {0x1, 0, 0}, 0x3},
{0x1, {0x2, 0xf0, 0}, 0x5},
{0x10, {0x3, 0xf0, 0}, 0x4},
{0x38, {0x8, 0xf0, 0}, 0x5}
};
unsigned char finfo = sframe_fde_create_func_info (SFRAME_FRE_TYPE_ADDR1,
SFRAME_FDE_TYPE_PCINC);
err = sframe_encoder_add_funcdesc (encode, 0xfffff03e, 0x40, finfo, 4);
if (err == -1)
return err;
for (i = 0; i < 4; i++)
if (sframe_encoder_add_fre (encode, idx,fres+i) == SFRAME_ERR)
return -1;
return 0;
}
static int
add_fde2 (sframe_encoder_ctx *encode, int idx)
{
int i, err;
/* A contiguous block containing 4 FREs. */
sframe_frame_row_entry fres[]
= { {0x0, {0x10, 0, 0}, 0x3},
{0x10, {0x12, 0xf0, 0}, 0x5},
{0x14, {0x14, 0xf0, 0}, 0x4},
{0x20, {0x15, 0xf0, 0}, 0x5}
};
unsigned char finfo = sframe_fde_create_func_info (SFRAME_FRE_TYPE_ADDR1,
SFRAME_FDE_TYPE_PCINC);
err = sframe_encoder_add_funcdesc (encode, 0xfffff08e, 0x60, finfo, 4);
if (err == -1)
return err;
for (i = 0; i < 4; i++)
if (sframe_encoder_add_fre (encode, idx, fres+i) == SFRAME_ERR)
return -1;
return 0;
}
static int
add_fde3 (sframe_encoder_ctx *encode, int idx)
{
int i, err;
/* A contiguous block containing 4 FREs. */
sframe_frame_row_entry fres[]
= { {0x0, {0x16, 0, 0}, 0x3},
{0x1, {0x17, 0xf0, 0}, 0x5},
{0x10, {0x18, 0xf0, 0}, 0x4},
{0x38, {0x19, 0xf0, 0}, 0x5}
};
unsigned char finfo = sframe_fde_create_func_info (SFRAME_FRE_TYPE_ADDR1,
SFRAME_FDE_TYPE_PCINC);
err = sframe_encoder_add_funcdesc (encode, 0xfffff10e, 0x40, finfo, 4);
if (err == -1)
return err;
for (i = 0; i < 4; i++)
if (sframe_encoder_add_fre (encode, idx,fres+i) == SFRAME_ERR)
return -1;
return 0;
}
int main (void)
{
sframe_encoder_ctx *encode;
sframe_decoder_ctx *dctx;
sframe_frame_row_entry frep;
char *sframe_buf;
size_t sf_size;
int err = 0;
unsigned int fde_cnt = 0;
#define TEST(name, cond) \
do \
{ \
if (cond) \
pass (name); \
else \
fail (name); \
} \
while (0)
encode = sframe_encode (SFRAME_VERSION, 0,
SFRAME_ABI_AMD64_ENDIAN_LITTLE,
SFRAME_CFA_FIXED_FP_INVALID,
-8, /* Fixed RA offset for AMD64. */
&err);
/* Add FDE at index 0. */
err = add_fde1 (encode, 0);
TEST ("findfunc-1: Adding FDE1", err == 0);
/* Add FDE at index 1. */
err = add_fde2 (encode, 1);
TEST ("findfunc-1: Adding FDE2", err == 0);
/* Add FDE at index 2. */
err = add_fde3 (encode, 2);
TEST ("findfunc-1: Adding FDE3", err == 0);
fde_cnt = sframe_encoder_get_num_fidx (encode);
TEST ("findfunc-1: Test FDE count", fde_cnt == 3);
sframe_buf = sframe_encoder_write (encode, &sf_size, &err);
TEST ("findfunc-1: Encoder write", err == 0);
dctx = sframe_decode (sframe_buf, sf_size, &err);
TEST("findfunc-1: Decoder setup", dctx != NULL);
/* Following negative tests check that libsframe APIs
(sframe_get_funcdesc_with_addr, sframe_find_fre) work
well for PCs not covered by the FDEs. */
/* Search with PC less than the first FDE's start addr. */
err = sframe_find_fre (dctx, (0xfffff03e - 0x15), &frep);
TEST("findfunc-1: test-1: Find FRE for PC not in range",
(err == SFRAME_ERR));
/* Search with a PC between func1's last PC and func2's first PC. */
err = sframe_find_fre (dctx, (0xfffff03e + 0x40 + 0x1), &frep);
TEST("findfunc-1: test-2: Find FRE for PC not in range",
(err == SFRAME_ERR));
/* Search for a PC between func2's last PC and func3's first PC. */
err = sframe_find_fre (dctx, (0xfffff08e + 0x60 + 0x3), &frep);
TEST("findfunc-1: test-3: Find FRE for PC not in range",
(err == SFRAME_ERR));
/* Search for a PC beyond the last func, i.e., > func3's last PC. */
err = sframe_find_fre (dctx, (0xfffff10e + 0x40 + 0x10), &frep);
TEST("findfunc-1: test-4: Find FRE for PC not in range",
(err == SFRAME_ERR));
/* And some positive tests... */
/* Find an FRE for PC in FDE1. */
err = sframe_find_fre (dctx, (0xfffff03e + 0x9), &frep);
TEST("findfunc-1: Find FRE in FDE1",
((err == 0) && (sframe_fre_get_cfa_offset(dctx, &frep, &err) == 0x2)));
/* Find an FRE for PC in FDE2. */
err = sframe_find_fre (dctx, (0xfffff08e + 0x11), &frep);
TEST("findfunc-1: Find FRE in FDE2",
((err == 0) && (sframe_fre_get_cfa_offset(dctx, &frep, &err) == 0x12)));
/* Find an FRE for PC in FDE3. */
err = sframe_find_fre (dctx, (0xfffff10e + 0x10), &frep);
TEST("findfunc-1: Find FRE in FDE3",
((err == 0) && (sframe_fre_get_cfa_offset(dctx, &frep, &err) == 0x18)));
sframe_encoder_free (&encode);
sframe_decoder_free (&dctx);
return 0;
}
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