fix some potential memory leaks, remove a few old unused functions

driver-opencl.c

@@ -1294,6 +1294,8 @@ static bool opencl_thread_init(struct thr_info *thr)
 	status |= clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_TRUE, 0,
 				       buffersize, blank_res, 0, NULL, NULL);
 	if (unlikely(status != CL_SUCCESS)) {
+		free(thrdata->res);
+		free(thrdata);
 		applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed.");
 		return false;
 	}
@@ -1434,6 +1436,8 @@ static void opencl_thread_shutdown(struct thr_info *thr)
 		clReleaseProgram(clState->program);
 		clReleaseCommandQueue(clState->commandQueue);
 		clReleaseContext(clState->context);
+		if (clState->extra_kernels)
+			free(clState->extra_kernels);
 		free(clState);
 	}
 }

findnonce.c

@@ -230,6 +230,7 @@ void postcalc_hash_async(struct thr_info *thr, struct work *work, uint32_t *res)
 
 	if (pthread_create(&pcd->pth, NULL, postcalc_hash, (void *)pcd)) {
 		applog(LOG_ERR, "Failed to create postcalc_hash thread");
-		return;
+		discard_work(pcd->work);
+		free(pcd);
 	}
 }

miner.h

@@ -370,8 +370,6 @@ struct device_drv {
 	double working_diff;
 };
 
-extern struct device_drv *copy_drv(struct device_drv*);
-
 enum dev_enable {
 	DEV_ENABLED,
 	DEV_DISABLED,
@@ -573,24 +571,6 @@ struct string_elist {
 	struct list_head list;
 };
 
-static inline void string_elist_add(const char *s, struct list_head *head)
-{
-	struct string_elist *n;
-
-	n = (struct string_elist *)calloc(1, sizeof(*n));
-	n->string = strdup(s);
-	n->free_me = true;
-	list_add_tail(&n->list, head);
-}
-
-static inline void string_elist_del(struct string_elist *item)
-{
-	if (item->free_me)
-		free(item->string);
-	list_del(&item->list);
-}
-
-
 static inline uint32_t swab32(uint32_t v)
 {
 	return bswap_32(v);

ocl.c

@@ -278,7 +278,7 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize, algorithm_t *alg
 	}
 
 	if (numDevices > 0 ) {
-		devices = (cl_device_id *)malloc(numDevices*sizeof(cl_device_id));
+		devices = (cl_device_id *)alloca(numDevices*sizeof(cl_device_id));
 
 		/* Now, get the device list data */
 
@@ -339,7 +339,7 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize, algorithm_t *alg
 
 	/* Check for BFI INT support. Hopefully people don't mix devices with
 	 * and without it! */
-	char * extensions = (char *)malloc(1024);
+	char extensions[1024];
 	const char * camo = "cl_amd_media_ops";
 	char *find;
 
@@ -353,7 +353,7 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize, algorithm_t *alg
 		clState->hasBitAlign = true;
 
 	/* Check for OpenCL >= 1.0 support, needed for global offset parameter usage. */
-	char * devoclver = (char *)malloc(1024);
+	char devoclver[1024];
 	const char * ocl10 = "OpenCL 1.0";
 	const char * ocl11 = "OpenCL 1.1";
 
@@ -493,6 +493,7 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize, algorithm_t *alg
 	binaries = (char **)calloc(sizeof(char *) * MAX_GPUDEVICES * 4, 1);
 	if (unlikely(!binaries)) {
 		applog(LOG_ERR, "Unable to calloc binaries");
+		free(binary_sizes);
 		return NULL;
 	}
 
@@ -528,7 +529,7 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize, algorithm_t *alg
 		if (unlikely(!binaries[slot])) {
 			applog(LOG_ERR, "Unable to calloc binaries");
 			fclose(binaryfile);
-			return NULL;
+			goto not_built;
 		}
 
 		if (fread(binaries[slot], 1, binary_sizes[slot], binaryfile) != binary_sizes[slot]) {
@@ -562,7 +563,7 @@ build:
 	clState->program = clCreateProgramWithSource(clState->context, 1, (const char **)&source, sourceSize, &status);
 	if (status != CL_SUCCESS) {
 		applog(LOG_ERR, "Error %d: Loading Binary into cl_program (clCreateProgramWithSource)", status);
-		return NULL;
+		goto not_built;
 	}
 
 	/* create a cl program executable for all the devices specified */
@@ -615,13 +616,13 @@ build:
 
 	if (status != CL_SUCCESS) {
 		applog(LOG_ERR, "Error %d: Building Program (clBuildProgram)", status);
-		size_t logSize;
-		status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, 0, NULL, &logSize);
+		size_t log_size;
+		status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, 0, NULL, &log_size);
 
-		char *log = (char *)malloc(logSize);
-		status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, logSize, log, NULL);
-		applog(LOG_ERR, "%s", log);
-		return NULL;
+		char sz_log[log_size];
+		status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, log_size, sz_log, NULL);
+		applog(LOG_ERR, "%s", sz_log);
+		goto not_built;
 	}
 
 	prog_built = true;
@@ -635,13 +636,13 @@ build:
 	status = clGetProgramInfo(clState->program, CL_PROGRAM_NUM_DEVICES, sizeof(cl_uint), &cpnd, NULL);
 	if (unlikely(status != CL_SUCCESS)) {
 		applog(LOG_ERR, "Error %d: Getting program info CL_PROGRAM_NUM_DEVICES. (clGetProgramInfo)", status);
-		return NULL;
+		goto not_built;
 	}
 
 	status = clGetProgramInfo(clState->program, CL_PROGRAM_BINARY_SIZES, sizeof(size_t)*cpnd, binary_sizes, NULL);
 	if (unlikely(status != CL_SUCCESS)) {
 		applog(LOG_ERR, "Error %d: Getting program info CL_PROGRAM_BINARY_SIZES. (clGetProgramInfo)", status);
-		return NULL;
+		goto not_built;
 	}
 
 	/* The actual compiled binary ends up in a RANDOM slot! Grr, so we have
@@ -655,13 +656,13 @@ build:
 	applog(LOG_DEBUG, "Binary size for gpu %d found in binary slot %d: %d", gpu, slot, (int)(binary_sizes[slot]));
 	if (!binary_sizes[slot]) {
 		applog(LOG_ERR, "OpenCL compiler generated a zero sized binary, FAIL!");
-		return NULL;
+		goto not_built;
 	}
 	binaries[slot] = (char *)calloc(sizeof(char)* binary_sizes[slot], 1);
 	status = clGetProgramInfo(clState->program, CL_PROGRAM_BINARIES, sizeof(char *) * cpnd, binaries, NULL );
 	if (unlikely(status != CL_SUCCESS)) {
 		applog(LOG_ERR, "Error %d: Getting program info. CL_PROGRAM_BINARIES (clGetProgramInfo)", status);
-		return NULL;
+		goto not_built;
 	}
 
 	/* Patch the kernel if the hardware supports BFI_INT but it needs to
@@ -701,13 +702,13 @@ build:
 		status = clReleaseProgram(clState->program);
 		if (status != CL_SUCCESS) {
 			applog(LOG_ERR, "Error %d: Releasing program. (clReleaseProgram)", status);
-			return NULL;
+			goto not_built;
 		}
 
 		clState->program = clCreateProgramWithBinary(clState->context, 1, &devices[gpu], &binary_sizes[slot], (const unsigned char **)&binaries[slot], &status, NULL);
 		if (status != CL_SUCCESS) {
 			applog(LOG_ERR, "Error %d: Loading Binary into cl_program (clCreateProgramWithBinary)", status);
-			return NULL;
+			goto not_built;
 		}
 
 		/* Program needs to be rebuilt */
@@ -724,10 +725,18 @@ build:
 	} else {
 		if (unlikely(fwrite(binaries[slot], 1, binary_sizes[slot], binaryfile) != binary_sizes[slot])) {
 			applog(LOG_ERR, "Unable to fwrite to binaryfile");
-			return NULL;
+
 		}
 		fclose(binaryfile);
 	}
+
+	goto built;
+not_built:
+	if (binaries[slot])
+		free(binaries[slot]);
+	free(binaries);
+	free(binary_sizes);
+	return NULL;
 built:
 	if (binaries[slot])
 		free(binaries[slot]);
@@ -743,12 +752,12 @@ built:
 		status = clBuildProgram(clState->program, 1, &devices[gpu], NULL, NULL, NULL);
 		if (status != CL_SUCCESS) {
 			applog(LOG_ERR, "Error %d: Building Program (clBuildProgram)", status);
-			size_t logSize;
-			status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, 0, NULL, &logSize);
+			size_t log_size;
+			status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, 0, NULL, &log_size);
 
-			char *log = (char *)malloc(logSize);
-			status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, logSize, log, NULL);
-			applog(LOG_ERR, "%s", log);
+			char sz_log[log_size];
+			status = clGetProgramBuildInfo(clState->program, devices[gpu], CL_PROGRAM_BUILD_LOG, log_size, sz_log, NULL);
+			applog(LOG_ERR, "%s", sz_log);
 			return NULL;
 		}
 	}
@@ -764,7 +773,7 @@ built:
   clState->n_extra_kernels = algorithm->n_extra_kernels;
   if (clState->n_extra_kernels > 0) {
     unsigned int i;
-    char *kernel_name = (char *)malloc(9); // max: search99 + 0x0
+    char kernel_name[9]; // max: search99 + 0x0
 
     clState->extra_kernels = (cl_kernel *)malloc(sizeof(cl_kernel) * clState->n_extra_kernels);
 
@@ -776,8 +785,6 @@ built:
         return NULL;
       }
     }
-
-    free(kernel_name);
   }
 
 	size_t bufsize;

sgminer.c

@@ -1673,6 +1673,7 @@ static char *load_config(const char *arg, void __maybe_unused *unused)
 #endif
   if (!json_is_object(config)) {
     siz = JSON_LOAD_ERROR_LEN + strlen(arg) + strlen(err.text);
+    // TODO: memory leak
     json_error = (char *)malloc(siz);
     if (!json_error)
       quit(1, "Malloc failure in json error");
@@ -5698,6 +5699,7 @@ static void *stratum_sthread(void *userdata)
       continue;
     }
 
+    // TODO: check for memory leaks
     sshare = (struct stratum_share *)calloc(sizeof(struct stratum_share), 1);
     hash32 = (uint32_t *)work->hash;
     submitted = false;
@@ -8090,19 +8092,6 @@ bool add_cgpu(struct cgpu_info *cgpu)
   return true;
 }
 
-struct device_drv *copy_drv(struct device_drv *drv)
-{
-  struct device_drv *copy;
-
-  if (unlikely(!(copy = (struct device_drv *)malloc(sizeof(*copy))))) {
-    quit(1, "Failed to allocate device_drv copy of %s (%s)",
-        drv->name, drv->copy ? "copy" : "original");
-  }
-  memcpy(copy, drv, sizeof(*copy));
-  copy->copy = true;
-  return copy;
-}
-
 static void probe_pools(void)
 {
   int i;

util.c

@@ -2641,40 +2641,6 @@ void *realloc_strcat(char *ptr, char *s)
 	return ret;
 }
 
-/* Make a text readable version of a string using 0xNN for < ' ' or > '~'
- * Including 0x00 at the end
- * You must free the result yourself */
-void *str_text(char *ptr)
-{
-	unsigned char *uptr;
-	char *ret, *txt;
-
-	if (ptr == NULL) {
-		ret = strdup("(null)");
-
-		if (unlikely(!ret))
-			quithere(1, "Failed to malloc null");
-	}
-
-	uptr = (unsigned char *)ptr;
-
-	ret = txt = (char *)malloc(strlen(ptr) * 4 + 5); // Guaranteed >= needed
-	if (unlikely(!txt))
-		quithere(1, "Failed to malloc txt");
-
-	do {
-		if (*uptr < ' ' || *uptr > '~') {
-			sprintf(txt, "0x%02x", *uptr);
-			txt += 4;
-		} else
-			*(txt++) = *uptr;
-	} while (*(uptr++));
-
-	*txt = '\0';
-
-	return ret;
-}
-
 void RenameThread(const char* name)
 {
 	char buf[16];
@@ -2900,10 +2866,11 @@ bool cg_completion_timeout(void *fn, void *fnarg, int timeout)
 	pthread_create(&pthread, NULL, completion_thread, (void *)cgc);
 
 	ret = cgsem_mswait(&cgc->cgsem, timeout);
-	if (!ret) {
-		pthread_join(pthread, NULL);
-		free(cgc);
-	} else
+
+	if (ret)
 		pthread_cancel(pthread);
+
+	pthread_join(pthread, NULL);
+	free(cgc);
 	return !ret;
 }

util.h

@@ -143,7 +143,6 @@ bool restart_stratum(struct pool *pool);
 void suspend_stratum(struct pool *pool);
 void dev_error(struct cgpu_info *dev, enum dev_reason reason);
 void *realloc_strcat(char *ptr, char *s);
-void *str_text(char *ptr);
 void RenameThread(const char* name);
 void _cgsem_init(cgsem_t *cgsem, const char *file, const char *func, const int line);
 void _cgsem_post(cgsem_t *cgsem, const char *file, const char *func, const int line);