include/qapi/error.h says:
> We recommend
> * bool-valued functions return true on success / false on failure,
> ...
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
contrib/elf2dmp/addrspace.h | 6 +--
contrib/elf2dmp/download.h | 2 +-
contrib/elf2dmp/pdb.h | 2 +-
contrib/elf2dmp/qemu_elf.h | 2 +-
contrib/elf2dmp/addrspace.c | 12 ++---
contrib/elf2dmp/download.c | 10 ++--
contrib/elf2dmp/main.c | 114 +++++++++++++++++++++-----------------------
contrib/elf2dmp/pdb.c | 50 +++++++++----------
contrib/elf2dmp/qemu_elf.c | 32 ++++++-------
9 files changed, 112 insertions(+), 118 deletions(-)
diff --git a/contrib/elf2dmp/addrspace.h b/contrib/elf2dmp/addrspace.h
index 039c70c5b079..2ad30a9da48a 100644
--- a/contrib/elf2dmp/addrspace.h
+++ b/contrib/elf2dmp/addrspace.h
@@ -33,13 +33,13 @@ struct va_space {
struct pa_space *ps;
};
-int pa_space_create(struct pa_space *ps, QEMU_Elf *qemu_elf);
+void pa_space_create(struct pa_space *ps, QEMU_Elf *qemu_elf);
void pa_space_destroy(struct pa_space *ps);
void va_space_create(struct va_space *vs, struct pa_space *ps, uint64_t dtb);
void va_space_set_dtb(struct va_space *vs, uint64_t dtb);
void *va_space_resolve(struct va_space *vs, uint64_t va);
-int va_space_rw(struct va_space *vs, uint64_t addr,
- void *buf, size_t size, int is_write);
+bool va_space_rw(struct va_space *vs, uint64_t addr,
+ void *buf, size_t size, int is_write);
#endif /* ADDRSPACE_H */
diff --git a/contrib/elf2dmp/download.h b/contrib/elf2dmp/download.h
index 5c274925f7aa..f65adb5d0894 100644
--- a/contrib/elf2dmp/download.h
+++ b/contrib/elf2dmp/download.h
@@ -8,6 +8,6 @@
#ifndef DOWNLOAD_H
#define DOWNLOAD_H
-int download_url(const char *name, const char *url);
+bool download_url(const char *name, const char *url);
#endif /* DOWNLOAD_H */
diff --git a/contrib/elf2dmp/pdb.h b/contrib/elf2dmp/pdb.h
index 2a50da56ac96..feddf1862f08 100644
--- a/contrib/elf2dmp/pdb.h
+++ b/contrib/elf2dmp/pdb.h
@@ -233,7 +233,7 @@ struct pdb_reader {
size_t segs_size;
};
-int pdb_init_from_file(const char *name, struct pdb_reader *reader);
+bool pdb_init_from_file(const char *name, struct pdb_reader *reader);
void pdb_exit(struct pdb_reader *reader);
uint64_t pdb_resolve(uint64_t img_base, struct pdb_reader *r, const char *name);
uint64_t pdb_find_public_v3_symbol(struct pdb_reader *reader, const char *name);
diff --git a/contrib/elf2dmp/qemu_elf.h b/contrib/elf2dmp/qemu_elf.h
index afa75f10b2d2..adc50238b46b 100644
--- a/contrib/elf2dmp/qemu_elf.h
+++ b/contrib/elf2dmp/qemu_elf.h
@@ -42,7 +42,7 @@ typedef struct QEMU_Elf {
int has_kernel_gs_base;
} QEMU_Elf;
-int QEMU_Elf_init(QEMU_Elf *qe, const char *filename);
+bool QEMU_Elf_init(QEMU_Elf *qe, const char *filename);
void QEMU_Elf_exit(QEMU_Elf *qe);
Elf64_Phdr *elf64_getphdr(void *map);
diff --git a/contrib/elf2dmp/addrspace.c b/contrib/elf2dmp/addrspace.c
index 6f608a517b1e..c995c723ae80 100644
--- a/contrib/elf2dmp/addrspace.c
+++ b/contrib/elf2dmp/addrspace.c
@@ -57,7 +57,7 @@ static void pa_block_align(struct pa_block *b)
b->paddr += low_align;
}
-int pa_space_create(struct pa_space *ps, QEMU_Elf *qemu_elf)
+void pa_space_create(struct pa_space *ps, QEMU_Elf *qemu_elf)
{
Elf64_Half phdr_nr = elf_getphdrnum(qemu_elf->map);
Elf64_Phdr *phdr = elf64_getphdr(qemu_elf->map);
@@ -87,8 +87,6 @@ int pa_space_create(struct pa_space *ps, QEMU_Elf *qemu_elf)
}
ps->block_nr = block_i;
-
- return 0;
}
void pa_space_destroy(struct pa_space *ps)
@@ -228,8 +226,8 @@ void *va_space_resolve(struct va_space *vs, uint64_t va)
return pa_space_resolve(vs->ps, pa);
}
-int va_space_rw(struct va_space *vs, uint64_t addr,
- void *buf, size_t size, int is_write)
+bool va_space_rw(struct va_space *vs, uint64_t addr,
+ void *buf, size_t size, int is_write)
{
while (size) {
uint64_t page = addr & ELF2DMP_PFN_MASK;
@@ -240,7 +238,7 @@ int va_space_rw(struct va_space *vs, uint64_t addr,
ptr = va_space_resolve(vs, addr);
if (!ptr) {
- return 1;
+ return false;
}
if (is_write) {
@@ -254,5 +252,5 @@ int va_space_rw(struct va_space *vs, uint64_t addr,
addr += s;
}
- return 0;
+ return true;
}
diff --git a/contrib/elf2dmp/download.c b/contrib/elf2dmp/download.c
index 902dc04ffa5c..ec8d33ba1e4b 100644
--- a/contrib/elf2dmp/download.c
+++ b/contrib/elf2dmp/download.c
@@ -9,14 +9,14 @@
#include <curl/curl.h>
#include "download.h"
-int download_url(const char *name, const char *url)
+bool download_url(const char *name, const char *url)
{
- int err = 1;
+ bool success = false;
FILE *file;
CURL *curl = curl_easy_init();
if (!curl) {
- return 1;
+ return success;
}
file = fopen(name, "wb");
@@ -33,11 +33,11 @@ int download_url(const char *name, const char *url)
unlink(name);
fclose(file);
} else {
- err = fclose(file);
+ success = !fclose(file);
}
out_curl:
curl_easy_cleanup(curl);
- return err;
+ return success;
}
diff --git a/contrib/elf2dmp/main.c b/contrib/elf2dmp/main.c
index 89bf4e23566b..140ac6e00cfe 100644
--- a/contrib/elf2dmp/main.c
+++ b/contrib/elf2dmp/main.c
@@ -79,7 +79,7 @@ static KDDEBUGGER_DATA64 *get_kdbg(uint64_t KernBase, struct pdb_reader *pdb,
bool decode = false;
uint64_t kwn, kwa, KdpDataBlockEncoded;
- if (va_space_rw(vs,
+ if (!va_space_rw(vs,
KdDebuggerDataBlock + offsetof(KDDEBUGGER_DATA64, Header),
&kdbg_hdr, sizeof(kdbg_hdr), 0)) {
eprintf("Failed to extract KDBG header\n");
@@ -97,8 +97,8 @@ static KDDEBUGGER_DATA64 *get_kdbg(uint64_t KernBase, struct pdb_reader *pdb,
return NULL;
}
- if (va_space_rw(vs, KiWaitNever, &kwn, sizeof(kwn), 0) ||
- va_space_rw(vs, KiWaitAlways, &kwa, sizeof(kwa), 0)) {
+ if (!va_space_rw(vs, KiWaitNever, &kwn, sizeof(kwn), 0) ||
+ !va_space_rw(vs, KiWaitAlways, &kwa, sizeof(kwa), 0)) {
return NULL;
}
@@ -122,7 +122,7 @@ static KDDEBUGGER_DATA64 *get_kdbg(uint64_t KernBase, struct pdb_reader *pdb,
kdbg = g_malloc(kdbg_hdr.Size);
- if (va_space_rw(vs, KdDebuggerDataBlock, kdbg, kdbg_hdr.Size, 0)) {
+ if (!va_space_rw(vs, KdDebuggerDataBlock, kdbg, kdbg_hdr.Size, 0)) {
eprintf("Failed to extract entire KDBG\n");
g_free(kdbg);
return NULL;
@@ -186,13 +186,13 @@ static void win_context_init_from_qemu_cpu_state(WinContext64 *ctx,
* Finds paging-structure hierarchy base,
* if previously set doesn't give access to kernel structures
*/
-static int fix_dtb(struct va_space *vs, QEMU_Elf *qe)
+static bool fix_dtb(struct va_space *vs, QEMU_Elf *qe)
{
/*
* Firstly, test previously set DTB.
*/
if (va_space_resolve(vs, SharedUserData)) {
- return 0;
+ return true;
}
/*
@@ -206,7 +206,7 @@ static int fix_dtb(struct va_space *vs, QEMU_Elf *qe)
va_space_set_dtb(vs, s->cr[3]);
printf("DTB 0x%016"PRIx64" has been found from CPU #%zu"
" as system task CR3\n", vs->dtb, i);
- return !(va_space_resolve(vs, SharedUserData));
+ return !!(va_space_resolve(vs, SharedUserData));
}
}
@@ -226,10 +226,10 @@ static int fix_dtb(struct va_space *vs, QEMU_Elf *qe)
va_space_set_dtb(vs, *cr3);
printf("DirectoryTableBase = 0x%016"PRIx64" has been found from CPU #0"
" as interrupt handling CR3\n", vs->dtb);
- return !(va_space_resolve(vs, SharedUserData));
+ return !!(va_space_resolve(vs, SharedUserData));
}
- return 1;
+ return false;
}
static void try_merge_runs(struct pa_space *ps,
@@ -268,9 +268,10 @@ static void try_merge_runs(struct pa_space *ps,
}
}
-static int fill_header(WinDumpHeader64 *hdr, struct pa_space *ps,
- struct va_space *vs, uint64_t KdDebuggerDataBlock,
- KDDEBUGGER_DATA64 *kdbg, uint64_t KdVersionBlock, int nr_cpus)
+static bool fill_header(WinDumpHeader64 *hdr, struct pa_space *ps,
+ struct va_space *vs, uint64_t KdDebuggerDataBlock,
+ KDDEBUGGER_DATA64 *kdbg, uint64_t KdVersionBlock,
+ int nr_cpus)
{
uint32_t *suite_mask = va_space_resolve(vs, SharedUserData +
KUSD_OFFSET_SUITE_MASK);
@@ -283,12 +284,12 @@ static int fill_header(WinDumpHeader64 *hdr, struct pa_space *ps,
QEMU_BUILD_BUG_ON(KUSD_OFFSET_PRODUCT_TYPE >= ELF2DMP_PAGE_SIZE);
if (!suite_mask || !product_type) {
- return 1;
+ return false;
}
- if (va_space_rw(vs, KdVersionBlock, &kvb, sizeof(kvb), 0)) {
+ if (!va_space_rw(vs, KdVersionBlock, &kvb, sizeof(kvb), 0)) {
eprintf("Failed to extract KdVersionBlock\n");
- return 1;
+ return false;
}
h = (WinDumpHeader64) {
@@ -333,7 +334,7 @@ static int fill_header(WinDumpHeader64 *hdr, struct pa_space *ps,
*hdr = h;
- return 0;
+ return true;
}
/*
@@ -352,8 +353,8 @@ static void fill_context(KDDEBUGGER_DATA64 *kdbg,
WinContext64 ctx;
QEMUCPUState *s = qe->state[i];
- if (va_space_rw(vs, kdbg->KiProcessorBlock + sizeof(Prcb) * i,
- &Prcb, sizeof(Prcb), 0)) {
+ if (!va_space_rw(vs, kdbg->KiProcessorBlock + sizeof(Prcb) * i,
+ &Prcb, sizeof(Prcb), 0)) {
eprintf("Failed to read CPU #%d PRCB location\n", i);
continue;
}
@@ -363,8 +364,8 @@ static void fill_context(KDDEBUGGER_DATA64 *kdbg,
continue;
}
- if (va_space_rw(vs, Prcb + kdbg->OffsetPrcbContext,
- &Context, sizeof(Context), 0)) {
+ if (!va_space_rw(vs, Prcb + kdbg->OffsetPrcbContext,
+ &Context, sizeof(Context), 0)) {
eprintf("Failed to read CPU #%d ContextFrame location\n", i);
continue;
}
@@ -372,15 +373,15 @@ static void fill_context(KDDEBUGGER_DATA64 *kdbg,
printf("Filling context for CPU #%d...\n", i);
win_context_init_from_qemu_cpu_state(&ctx, s);
- if (va_space_rw(vs, Context, &ctx, sizeof(ctx), 1)) {
+ if (!va_space_rw(vs, Context, &ctx, sizeof(ctx), 1)) {
eprintf("Failed to fill CPU #%d context\n", i);
continue;
}
}
}
-static int pe_get_data_dir_entry(uint64_t base, void *start_addr, int idx,
- void *entry, size_t size, struct va_space *vs)
+static bool pe_get_data_dir_entry(uint64_t base, void *start_addr, int idx,
+ void *entry, size_t size, struct va_space *vs)
{
const char e_magic[2] = "MZ";
const char Signature[4] = "PE\0\0";
@@ -393,40 +394,39 @@ static int pe_get_data_dir_entry(uint64_t base, void *start_addr, int idx,
QEMU_BUILD_BUG_ON(sizeof(*dos_hdr) >= ELF2DMP_PAGE_SIZE);
if (memcmp(&dos_hdr->e_magic, e_magic, sizeof(e_magic))) {
- return 1;
+ return false;
}
- if (va_space_rw(vs, base + dos_hdr->e_lfanew,
- &nt_hdrs, sizeof(nt_hdrs), 0)) {
- return 1;
+ if (!va_space_rw(vs, base + dos_hdr->e_lfanew,
+ &nt_hdrs, sizeof(nt_hdrs), 0)) {
+ return false;
}
if (memcmp(&nt_hdrs.Signature, Signature, sizeof(Signature)) ||
file_hdr->Machine != 0x8664 || opt_hdr->Magic != 0x020b) {
- return 1;
+ return false;
}
- if (va_space_rw(vs,
- base + data_dir[idx].VirtualAddress,
- entry, size, 0)) {
- return 1;
+ if (!va_space_rw(vs, base + data_dir[idx].VirtualAddress,
+ entry, size, 0)) {
+ return false;
}
printf("Data directory entry #%d: RVA = 0x%08"PRIx32"\n", idx,
(uint32_t)data_dir[idx].VirtualAddress);
- return 0;
+ return true;
}
-static int write_dump(struct pa_space *ps,
- WinDumpHeader64 *hdr, const char *name)
+static bool write_dump(struct pa_space *ps,
+ WinDumpHeader64 *hdr, const char *name)
{
FILE *dmp_file = fopen(name, "wb");
size_t i;
if (!dmp_file) {
eprintf("Failed to open output file \'%s\'\n", name);
- return 1;
+ return false;
}
printf("Writing header to file...\n");
@@ -434,7 +434,7 @@ static int write_dump(struct pa_space *ps,
if (fwrite(hdr, sizeof(*hdr), 1, dmp_file) != 1) {
eprintf("Failed to write dump header\n");
fclose(dmp_file);
- return 1;
+ return false;
}
for (i = 0; i < ps->block_nr; i++) {
@@ -445,11 +445,11 @@ static int write_dump(struct pa_space *ps,
if (fwrite(b->addr, b->size, 1, dmp_file) != 1) {
eprintf("Failed to write block\n");
fclose(dmp_file);
- return 1;
+ return false;
}
}
- return fclose(dmp_file);
+ return !fclose(dmp_file);
}
static bool pe_check_pdb_name(uint64_t base, void *start_addr,
@@ -459,8 +459,8 @@ static bool pe_check_pdb_name(uint64_t base, void *start_addr,
IMAGE_DEBUG_DIRECTORY debug_dir;
char pdb_name[sizeof(PDB_NAME)];
- if (pe_get_data_dir_entry(base, start_addr, IMAGE_FILE_DEBUG_DIRECTORY,
- &debug_dir, sizeof(debug_dir), vs)) {
+ if (!pe_get_data_dir_entry(base, start_addr, IMAGE_FILE_DEBUG_DIRECTORY,
+ &debug_dir, sizeof(debug_dir), vs)) {
eprintf("Failed to get Debug Directory\n");
return false;
}
@@ -470,9 +470,8 @@ static bool pe_check_pdb_name(uint64_t base, void *start_addr,
return false;
}
- if (va_space_rw(vs,
- base + debug_dir.AddressOfRawData,
- rsds, sizeof(*rsds), 0)) {
+ if (!va_space_rw(vs, base + debug_dir.AddressOfRawData,
+ rsds, sizeof(*rsds), 0)) {
eprintf("Failed to resolve OMFSignatureRSDS\n");
return false;
}
@@ -488,9 +487,9 @@ static bool pe_check_pdb_name(uint64_t base, void *start_addr,
return false;
}
- if (va_space_rw(vs, base + debug_dir.AddressOfRawData +
- offsetof(OMFSignatureRSDS, name), pdb_name, sizeof(PDB_NAME),
- 0)) {
+ if (!va_space_rw(vs, base + debug_dir.AddressOfRawData +
+ offsetof(OMFSignatureRSDS, name),
+ pdb_name, sizeof(PDB_NAME), 0)) {
eprintf("Failed to resolve PDB name\n");
return false;
}
@@ -538,28 +537,25 @@ int main(int argc, char *argv[])
return 1;
}
- if (QEMU_Elf_init(&qemu_elf, argv[1])) {
+ if (!QEMU_Elf_init(&qemu_elf, argv[1])) {
eprintf("Failed to initialize QEMU ELF dump\n");
return 1;
}
- if (pa_space_create(&ps, &qemu_elf)) {
- eprintf("Failed to initialize physical address space\n");
- goto out_elf;
- }
+ pa_space_create(&ps, &qemu_elf);
state = qemu_elf.state[0];
printf("CPU #0 CR3 is 0x%016"PRIx64"\n", state->cr[3]);
va_space_create(&vs, &ps, state->cr[3]);
- if (fix_dtb(&vs, &qemu_elf)) {
+ if (!fix_dtb(&vs, &qemu_elf)) {
eprintf("Failed to find paging base\n");
goto out_elf;
}
printf("CPU #0 IDT is at 0x%016"PRIx64"\n", state->idt.base);
- if (va_space_rw(&vs, state->idt.base,
+ if (!va_space_rw(&vs, state->idt.base,
&first_idt_desc, sizeof(first_idt_desc), 0)) {
eprintf("Failed to get CPU #0 IDT[0]\n");
goto out_ps;
@@ -597,12 +593,12 @@ int main(int argc, char *argv[])
sprintf(pdb_url, "%s%s/%s/%s", SYM_URL_BASE, PDB_NAME, pdb_hash, PDB_NAME);
printf("PDB URL is %s\n", pdb_url);
- if (download_url(PDB_NAME, pdb_url)) {
+ if (!download_url(PDB_NAME, pdb_url)) {
eprintf("Failed to download PDB file\n");
goto out_ps;
}
- if (pdb_init_from_file(PDB_NAME, &pdb)) {
+ if (!pdb_init_from_file(PDB_NAME, &pdb)) {
eprintf("Failed to initialize PDB reader\n");
goto out_pdb_file;
}
@@ -617,14 +613,14 @@ int main(int argc, char *argv[])
goto out_pdb;
}
- if (fill_header(&header, &ps, &vs, KdDebuggerDataBlock, kdbg,
- KdVersionBlock, qemu_elf.state_nr)) {
+ if (!fill_header(&header, &ps, &vs, KdDebuggerDataBlock, kdbg,
+ KdVersionBlock, qemu_elf.state_nr)) {
goto out_kdbg;
}
fill_context(kdbg, &vs, &qemu_elf);
- if (write_dump(&ps, &header, argv[2])) {
+ if (!write_dump(&ps, &header, argv[2])) {
eprintf("Failed to save dump\n");
goto out_kdbg;
}
diff --git a/contrib/elf2dmp/pdb.c b/contrib/elf2dmp/pdb.c
index abf17c2e7c12..1c5051425185 100644
--- a/contrib/elf2dmp/pdb.c
+++ b/contrib/elf2dmp/pdb.c
@@ -158,30 +158,30 @@ static void *pdb_ds_read_file(struct pdb_reader* r, uint32_t file_number)
return pdb_ds_read(r->ds.header, block_list, file_size[file_number]);
}
-static int pdb_init_segments(struct pdb_reader *r)
+static bool pdb_init_segments(struct pdb_reader *r)
{
unsigned stream_idx = r->segments;
r->segs = pdb_ds_read_file(r, stream_idx);
if (!r->segs) {
- return 1;
+ return false;
}
r->segs_size = pdb_get_file_size(r, stream_idx);
if (!r->segs_size) {
- return 1;
+ return false;
}
- return 0;
+ return true;
}
-static int pdb_init_symbols(struct pdb_reader *r)
+static bool pdb_init_symbols(struct pdb_reader *r)
{
PDB_SYMBOLS *symbols;
symbols = pdb_ds_read_file(r, 3);
if (!symbols) {
- return 1;
+ return false;
}
r->symbols = symbols;
@@ -198,18 +198,18 @@ static int pdb_init_symbols(struct pdb_reader *r)
goto out_symbols;
}
- return 0;
+ return true;
out_symbols:
g_free(symbols);
- return 1;
+ return false;
}
-static int pdb_reader_ds_init(struct pdb_reader *r, PDB_DS_HEADER *hdr)
+static bool pdb_reader_ds_init(struct pdb_reader *r, PDB_DS_HEADER *hdr)
{
if (hdr->block_size == 0) {
- return 1;
+ return false;
}
memset(r->file_used, 0, sizeof(r->file_used));
@@ -218,22 +218,22 @@ static int pdb_reader_ds_init(struct pdb_reader *r, PDB_DS_HEADER *hdr)
hdr->toc_page * hdr->block_size), hdr->toc_size);
if (!r->ds.toc) {
- return 1;
+ return false;
}
- return 0;
+ return true;
}
-static int pdb_reader_init(struct pdb_reader *r, void *data)
+static bool pdb_reader_init(struct pdb_reader *r, void *data)
{
const char pdb7[] = "Microsoft C/C++ MSF 7.00";
if (memcmp(data, pdb7, sizeof(pdb7) - 1)) {
- return 1;
+ return false;
}
- if (pdb_reader_ds_init(r, data)) {
- return 1;
+ if (!pdb_reader_ds_init(r, data)) {
+ return false;
}
r->ds.root = pdb_ds_read_file(r, 1);
@@ -241,15 +241,15 @@ static int pdb_reader_init(struct pdb_reader *r, void *data)
goto out_ds;
}
- if (pdb_init_symbols(r)) {
+ if (!pdb_init_symbols(r)) {
goto out_root;
}
- if (pdb_init_segments(r)) {
+ if (!pdb_init_segments(r)) {
goto out_sym;
}
- return 0;
+ return true;
out_sym:
pdb_exit_symbols(r);
@@ -258,7 +258,7 @@ out_root:
out_ds:
pdb_reader_ds_exit(r);
- return 1;
+ return false;
}
static void pdb_reader_exit(struct pdb_reader *r)
@@ -269,7 +269,7 @@ static void pdb_reader_exit(struct pdb_reader *r)
pdb_reader_ds_exit(r);
}
-int pdb_init_from_file(const char *name, struct pdb_reader *reader)
+bool pdb_init_from_file(const char *name, struct pdb_reader *reader)
{
GError *gerr = NULL;
void *map;
@@ -278,21 +278,21 @@ int pdb_init_from_file(const char *name, struct pdb_reader *reader)
if (gerr) {
eprintf("Failed to map PDB file \'%s\'\n", name);
g_error_free(gerr);
- return 1;
+ return false;
}
reader->file_size = g_mapped_file_get_length(reader->gmf);
map = g_mapped_file_get_contents(reader->gmf);
- if (pdb_reader_init(reader, map)) {
+ if (!pdb_reader_init(reader, map)) {
goto out_unmap;
}
- return 0;
+ return true;
out_unmap:
g_mapped_file_unref(reader->gmf);
- return 1;
+ return false;
}
void pdb_exit(struct pdb_reader *reader)
diff --git a/contrib/elf2dmp/qemu_elf.c b/contrib/elf2dmp/qemu_elf.c
index 055e6f8792e9..a22c057d3ec3 100644
--- a/contrib/elf2dmp/qemu_elf.c
+++ b/contrib/elf2dmp/qemu_elf.c
@@ -60,7 +60,7 @@ Elf64_Half elf_getphdrnum(void *map)
return ehdr->e_phnum;
}
-static int init_states(QEMU_Elf *qe)
+static bool init_states(QEMU_Elf *qe)
{
Elf64_Phdr *phdr = elf64_getphdr(qe->map);
Elf64_Nhdr *start = (void *)((uint8_t *)qe->map + phdr[0].p_offset);
@@ -70,7 +70,7 @@ static int init_states(QEMU_Elf *qe)
if (phdr[0].p_type != PT_NOTE) {
eprintf("Failed to find PT_NOTE\n");
- return 1;
+ return false;
}
qe->has_kernel_gs_base = 1;
@@ -107,7 +107,7 @@ static int init_states(QEMU_Elf *qe)
qe->state_nr = cpu_nr;
- return 0;
+ return true;
}
static void exit_states(QEMU_Elf *qe)
@@ -162,7 +162,7 @@ static bool check_ehdr(QEMU_Elf *qe)
return true;
}
-static int QEMU_Elf_map(QEMU_Elf *qe, const char *filename)
+static bool QEMU_Elf_map(QEMU_Elf *qe, const char *filename)
{
#ifdef CONFIG_LINUX
struct stat st;
@@ -173,13 +173,13 @@ static int QEMU_Elf_map(QEMU_Elf *qe, const char *filename)
fd = open(filename, O_RDONLY, 0);
if (fd == -1) {
eprintf("Failed to open ELF dump file \'%s\'\n", filename);
- return 1;
+ return false;
}
if (fstat(fd, &st)) {
eprintf("Failed to get size of ELF dump file\n");
close(fd);
- return 1;
+ return false;
}
qe->size = st.st_size;
@@ -188,7 +188,7 @@ static int QEMU_Elf_map(QEMU_Elf *qe, const char *filename)
if (qe->map == MAP_FAILED) {
eprintf("Failed to map ELF file\n");
close(fd);
- return 1;
+ return false;
}
close(fd);
@@ -201,14 +201,14 @@ static int QEMU_Elf_map(QEMU_Elf *qe, const char *filename)
if (gerr) {
eprintf("Failed to map ELF dump file \'%s\'\n", filename);
g_error_free(gerr);
- return 1;
+ return false;
}
qe->map = g_mapped_file_get_contents(qe->gmf);
qe->size = g_mapped_file_get_length(qe->gmf);
#endif
- return 0;
+ return true;
}
static void QEMU_Elf_unmap(QEMU_Elf *qe)
@@ -220,25 +220,25 @@ static void QEMU_Elf_unmap(QEMU_Elf *qe)
#endif
}
-int QEMU_Elf_init(QEMU_Elf *qe, const char *filename)
+bool QEMU_Elf_init(QEMU_Elf *qe, const char *filename)
{
- if (QEMU_Elf_map(qe, filename)) {
- return 1;
+ if (!QEMU_Elf_map(qe, filename)) {
+ return false;
}
if (!check_ehdr(qe)) {
eprintf("Input file has the wrong format\n");
QEMU_Elf_unmap(qe);
- return 1;
+ return false;
}
- if (init_states(qe)) {
+ if (!init_states(qe)) {
eprintf("Failed to extract QEMU CPU states\n");
QEMU_Elf_unmap(qe);
- return 1;
+ return false;
}
- return 0;
+ return true;
}
void QEMU_Elf_exit(QEMU_Elf *qe)
--
2.44.0On Tue, 5 Mar 2024 at 07:36, Akihiko Odaki <akihiko.odaki@daynix.com> wrote:
>
> include/qapi/error.h says:
> > We recommend
> > * bool-valued functions return true on success / false on failure,
> > ...
>
> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
> ---
> contrib/elf2dmp/addrspace.h | 6 +--
> contrib/elf2dmp/download.h | 2 +-
> contrib/elf2dmp/pdb.h | 2 +-
> contrib/elf2dmp/qemu_elf.h | 2 +-
> contrib/elf2dmp/addrspace.c | 12 ++---
> contrib/elf2dmp/download.c | 10 ++--
> contrib/elf2dmp/main.c | 114 +++++++++++++++++++++-----------------------
> contrib/elf2dmp/pdb.c | 50 +++++++++----------
> contrib/elf2dmp/qemu_elf.c | 32 ++++++-------
> 9 files changed, 112 insertions(+), 118 deletions(-)
This is a bit big to review easily. Converting one function
(or a small set of closely related functions) at once would
make for an easier to review split.
> diff --git a/contrib/elf2dmp/download.c b/contrib/elf2dmp/download.c
> index 902dc04ffa5c..ec8d33ba1e4b 100644
> --- a/contrib/elf2dmp/download.c
> +++ b/contrib/elf2dmp/download.c
> @@ -9,14 +9,14 @@
> #include <curl/curl.h>
> #include "download.h"
>
> -int download_url(const char *name, const char *url)
> +bool download_url(const char *name, const char *url)
> {
> - int err = 1;
> + bool success = false;
> FILE *file;
> CURL *curl = curl_easy_init();
>
> if (!curl) {
> - return 1;
> + return success;
Why not just "return false" ? "return success" makes it look
like a success-path, not a failure-path.
> }
>
> file = fopen(name, "wb");
> @@ -33,11 +33,11 @@ int download_url(const char *name, const char *url)
> unlink(name);
> fclose(file);
> } else {
> - err = fclose(file);
> + success = !fclose(file);
> }
>
> out_curl:
> curl_easy_cleanup(curl);
>
> - return err;
> + return success;
> }
> @@ -186,13 +186,13 @@ static void win_context_init_from_qemu_cpu_state(WinContext64 *ctx,
> * Finds paging-structure hierarchy base,
> * if previously set doesn't give access to kernel structures
> */
> -static int fix_dtb(struct va_space *vs, QEMU_Elf *qe)
> +static bool fix_dtb(struct va_space *vs, QEMU_Elf *qe)
> {
> /*
> * Firstly, test previously set DTB.
> */
> if (va_space_resolve(vs, SharedUserData)) {
> - return 0;
> + return true;
> }
>
> /*
> @@ -206,7 +206,7 @@ static int fix_dtb(struct va_space *vs, QEMU_Elf *qe)
> va_space_set_dtb(vs, s->cr[3]);
> printf("DTB 0x%016"PRIx64" has been found from CPU #%zu"
> " as system task CR3\n", vs->dtb, i);
> - return !(va_space_resolve(vs, SharedUserData));
> + return !!(va_space_resolve(vs, SharedUserData));
If the function returns bool type, we don't need the !! idiom
to coerce the value to bool.
> }
> }
>
thanks
-- PMM
On 2024/03/05 22:28, Peter Maydell wrote:
> On Tue, 5 Mar 2024 at 07:36, Akihiko Odaki <akihiko.odaki@daynix.com> wrote:
>>
>> include/qapi/error.h says:
>>> We recommend
>>> * bool-valued functions return true on success / false on failure,
>>> ...
>>
>> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
>> ---
>> contrib/elf2dmp/addrspace.h | 6 +--
>> contrib/elf2dmp/download.h | 2 +-
>> contrib/elf2dmp/pdb.h | 2 +-
>> contrib/elf2dmp/qemu_elf.h | 2 +-
>> contrib/elf2dmp/addrspace.c | 12 ++---
>> contrib/elf2dmp/download.c | 10 ++--
>> contrib/elf2dmp/main.c | 114 +++++++++++++++++++++-----------------------
>> contrib/elf2dmp/pdb.c | 50 +++++++++----------
>> contrib/elf2dmp/qemu_elf.c | 32 ++++++-------
>> 9 files changed, 112 insertions(+), 118 deletions(-)
>
> This is a bit big to review easily. Converting one function
> (or a small set of closely related functions) at once would
> make for an easier to review split.
I'll split patches for each source files.
>
>
>> diff --git a/contrib/elf2dmp/download.c b/contrib/elf2dmp/download.c
>> index 902dc04ffa5c..ec8d33ba1e4b 100644
>> --- a/contrib/elf2dmp/download.c
>> +++ b/contrib/elf2dmp/download.c
>> @@ -9,14 +9,14 @@
>> #include <curl/curl.h>
>> #include "download.h"
>>
>> -int download_url(const char *name, const char *url)
>> +bool download_url(const char *name, const char *url)
>> {
>> - int err = 1;
>> + bool success = false;
>> FILE *file;
>> CURL *curl = curl_easy_init();
>>
>> if (!curl) {
>> - return 1;
>> + return success;
>
> Why not just "return false" ? "return success" makes it look
> like a success-path, not a failure-path.
It is a mistake. I'll fix in the next version.
>
>> }
>>
>> file = fopen(name, "wb");
>> @@ -33,11 +33,11 @@ int download_url(const char *name, const char *url)
>> unlink(name);
>> fclose(file);
>> } else {
>> - err = fclose(file);
>> + success = !fclose(file);
>> }
>>
>> out_curl:
>> curl_easy_cleanup(curl);
>>
>> - return err;
>> + return success;
>> }
>
>> @@ -186,13 +186,13 @@ static void win_context_init_from_qemu_cpu_state(WinContext64 *ctx,
>> * Finds paging-structure hierarchy base,
>> * if previously set doesn't give access to kernel structures
>> */
>> -static int fix_dtb(struct va_space *vs, QEMU_Elf *qe)
>> +static bool fix_dtb(struct va_space *vs, QEMU_Elf *qe)
>> {
>> /*
>> * Firstly, test previously set DTB.
>> */
>> if (va_space_resolve(vs, SharedUserData)) {
>> - return 0;
>> + return true;
>> }
>>
>> /*
>> @@ -206,7 +206,7 @@ static int fix_dtb(struct va_space *vs, QEMU_Elf *qe)
>> va_space_set_dtb(vs, s->cr[3]);
>> printf("DTB 0x%016"PRIx64" has been found from CPU #%zu"
>> " as system task CR3\n", vs->dtb, i);
>> - return !(va_space_resolve(vs, SharedUserData));
>> + return !!(va_space_resolve(vs, SharedUserData));
>
> If the function returns bool type, we don't need the !! idiom
> to coerce the value to bool.
va_space_resolve() returns void *.
Regards,
Akihiko Odaki
On Wed, 6 Mar 2024 at 05:01, Akihiko Odaki <akihiko.odaki@daynix.com> wrote:
>
> On 2024/03/05 22:28, Peter Maydell wrote:
> > On Tue, 5 Mar 2024 at 07:36, Akihiko Odaki <akihiko.odaki@daynix.com> wrote:
> >> @@ -206,7 +206,7 @@ static int fix_dtb(struct va_space *vs, QEMU_Elf *qe)
> >> va_space_set_dtb(vs, s->cr[3]);
> >> printf("DTB 0x%016"PRIx64" has been found from CPU #%zu"
> >> " as system task CR3\n", vs->dtb, i);
> >> - return !(va_space_resolve(vs, SharedUserData));
> >> + return !!(va_space_resolve(vs, SharedUserData));
> >
> > If the function returns bool type, we don't need the !! idiom
> > to coerce the value to bool.
>
> va_space_resolve() returns void *.
Yes, and so when we return that value, because the function
return type is 'bool' it gets correctly turned into a
true/false value. You only need !! if you want to get
a 0-or-1 value in an int return type. Or does the compiler
otherwise issue a warning here?
thanks
-- PMM
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