127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
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/*
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* Copyright (c) 2012, Chris Andrews. All rights reserved.
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*/
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#include "usdt_internal.h"
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int
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usdt_dof_section_add_data(usdt_dof_section_t *section, void *data, size_t length)
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{
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int newlen = section->size + length;
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if ((section->data = realloc((char *)section->data, newlen)) == NULL)
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return (-1);
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memcpy(section->data + section->size, data, length);
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section->size = newlen;
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return (0);
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}
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size_t
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usdt_provider_dof_size(usdt_provider_t *provider, usdt_strtab_t *strtab)
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{
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uint8_t i, j;
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int args = 0;
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int probes = 0;
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size_t size = 0;
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usdt_probedef_t *pd;
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size_t sections[8];
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for (pd = provider->probedefs; pd != NULL; pd = pd->next) {
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args += pd->argc;
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probes++;
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}
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sections[0] = sizeof(dof_hdr_t);
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sections[1] = sizeof(dof_sec_t) * 6;
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sections[2] = strtab->size;
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sections[3] = sizeof(dof_probe_t) * probes;
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sections[4] = sizeof(uint8_t) * args;
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sections[5] = sizeof(uint32_t) * probes;
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sections[6] = sizeof(uint32_t) * probes;
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sections[7] = sizeof(dof_provider_t);
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for (i = 0; i < 8; i++) {
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size += sections[i];
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j = size % 8;
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if (j > 0)
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size += (8 - j);
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}
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return size;
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}
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int
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usdt_dof_section_init(usdt_dof_section_t *section, uint32_t type, dof_secidx_t index)
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{
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section->type = type;
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section->index = index;
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section->flags = DOF_SECF_LOAD;
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section->offset = 0;
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section->size = 0;
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section->entsize = 0;
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section->pad = 0;
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section->next = NULL;
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if ((section->data = malloc(1)) == NULL)
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return (-1);
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switch(type) {
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case DOF_SECT_PROBES: section->align = 8; break;
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case DOF_SECT_PRARGS: section->align = 1; break;
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case DOF_SECT_PROFFS: section->align = 4; break;
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case DOF_SECT_PRENOFFS: section->align = 4; break;
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case DOF_SECT_PROVIDER: section->align = 4; break;
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}
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return (0);
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}
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void
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usdt_dof_section_free(usdt_dof_section_t *section)
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{
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free(section->data);
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}
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int
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usdt_strtab_init(usdt_strtab_t *strtab, dof_secidx_t index)
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{
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strtab->type = DOF_SECT_STRTAB;;
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strtab->index = index;
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strtab->flags = DOF_SECF_LOAD;
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strtab->offset = 0;
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strtab->size = 0;
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strtab->entsize = 0;
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strtab->pad = 0;
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strtab->data = NULL;
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strtab->align = 1;
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strtab->strindex = 1;
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if ((strtab->data = (char *) malloc(1)) == NULL)
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return (-1);
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*strtab->data = '\0';
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return (0);
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}
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dof_stridx_t
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usdt_strtab_add(usdt_strtab_t *strtab, const char *string)
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{
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size_t length;
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int index;
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length = strlen(string);
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index = strtab->strindex;
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strtab->strindex += (length + 1);
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if ((strtab->data = realloc(strtab->data, strtab->strindex)) == NULL)
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return (0);
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memcpy((char *) (strtab->data + index), (char *)string, length + 1);
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strtab->size = index + length + 1;
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return (index);
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}
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