How to add pthread in examples of sve project?

ldmiracle 5 days ago

#include <pthread.h>

I use this line code in Arm Development Studio built-in sve_array_subtract example and has build errors that "pthread.h" file not found. How to solve it, I wanna use both multi-thread and sve instrinsics in the project.

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0 ldmiracle 1 hour ago in reply to Stephen Theobald

Thks, I met another mistake. I changed a simple Hello-World project, the target CPU choose armv9.2, and the FVP is AEMvAx1, and set semihosting-enable = 0 in model parameter, and when using memcpy to copy a struct to another destination struct, the value is incorrect, the code is

typedef struct {
	int width;
	int height;
} init_param;

typedef struct {
	init_param param;
	int flag;
} test_handle;

int main(int argc, char *argv[]) {
	uint8_t *a_buf = (uint8_t *)malloc(300000);
	printf("a_buf:%p\n", a_buf);
	printf("argc:%d\n", argc);
	for(int i=0; i<argc; i++) {
		printf("[%d] is %s\n", i, argv[i]);
	}
	init_param param22;
	param22.width = 3000;
	param22.height = 4000;

	test_handle *pHandle = (test_handle *)calloc(1, sizeof(test_handle));
	printf("sizeof(test_handle) = %zu\n", sizeof(test_handle));
	printf("offsetof(param):%zu\n", offsetof(test_handle, param));
	printf("offsetof(flag):%zu\n", offsetof(test_handle, flag));

	printf("pHandle:%p\n", pHandle);
	printf("param:%p\n", &pHandle->param);
	printf("flag:%p\n", &pHandle->flag);
	printf("sizeof(init_param):%zu\n", sizeof(init_param));
	printf("param22:%p\n", &param22);
	printf("width:%p\n", &param22.width);

	test_handle pHandle1;
	pHandle1.param=param22;
	pHandle->param=param22;
	memcpy(&pHandle->param, &param22, sizeof(init_param));


	cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!
	return 0;
}

The struct offset and address seems right, offset of flag in test_handle is 8, equals to the sizeof init_param. And the project links scatter file(semihosting-enable=0 needs a scatter file to ensure heap malloc is ok) writes

; my_400mb_heap.sct

; 加载区域（通常放在 Flash，但代码也可放 RAM）
LR_CODE 0x80000000 0x10000000  ; 256MB 用于代码和数据（可调整）
{
    ; 可执行代码和只读数据
    ER_RO 0x80000000
    {
        *(+RO)
    }

    ; 可读写数据（全局变量、堆栈前的数据）
    RW_IRAM +0
    {
        *(+RW +ZI)
    }

    ; 关键：定义 400MB 的 HEAP 区域
    ARM_LIB_HEAP +0 EMPTY 0x19000000 {}   ; 0x19000000 = 400MB (400 * 1024 * 1024)

    ; 栈（假设 1MB，向下增长）
    ARM_LIB_STACK 0xA0000000 EMPTY -0x100000 {}  ; 栈顶放在 2.5GB 处（0x80000000 + 0x20000000）
}

Is there something wrong in the project setting?

Reply

0 ldmiracle 1 hour ago in reply to Stephen Theobald

typedef struct {
	int width;
	int height;
} init_param;

typedef struct {
	init_param param;
	int flag;
} test_handle;

int main(int argc, char *argv[]) {
	uint8_t *a_buf = (uint8_t *)malloc(300000);
	printf("a_buf:%p\n", a_buf);
	printf("argc:%d\n", argc);
	for(int i=0; i<argc; i++) {
		printf("[%d] is %s\n", i, argv[i]);
	}
	init_param param22;
	param22.width = 3000;
	param22.height = 4000;

	test_handle *pHandle = (test_handle *)calloc(1, sizeof(test_handle));
	printf("sizeof(test_handle) = %zu\n", sizeof(test_handle));
	printf("offsetof(param):%zu\n", offsetof(test_handle, param));
	printf("offsetof(flag):%zu\n", offsetof(test_handle, flag));

	printf("pHandle:%p\n", pHandle);
	printf("param:%p\n", &pHandle->param);
	printf("flag:%p\n", &pHandle->flag);
	printf("sizeof(init_param):%zu\n", sizeof(init_param));
	printf("param22:%p\n", &param22);
	printf("width:%p\n", &param22.width);

	test_handle pHandle1;
	pHandle1.param=param22;
	pHandle->param=param22;
	memcpy(&pHandle->param, &param22, sizeof(init_param));


	cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!
	return 0;
}

; my_400mb_heap.sct

; 加载区域（通常放在 Flash，但代码也可放 RAM）
LR_CODE 0x80000000 0x10000000  ; 256MB 用于代码和数据（可调整）
{
    ; 可执行代码和只读数据
    ER_RO 0x80000000
    {
        *(+RO)
    }

    ; 可读写数据（全局变量、堆栈前的数据）
    RW_IRAM +0
    {
        *(+RW +ZI)
    }

    ; 关键：定义 400MB 的 HEAP 区域
    ARM_LIB_HEAP +0 EMPTY 0x19000000 {}   ; 0x19000000 = 400MB (400 * 1024 * 1024)

    ; 栈（假设 1MB，向下增长）
    ARM_LIB_STACK 0xA0000000 EMPTY -0x100000 {}  ; 栈顶放在 2.5GB 处（0x80000000 + 0x20000000）
}

Is there something wrong in the project setting?

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