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Modify RISCV minidump context to match Crashpad

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- RISCV32 will only include support for 32 bit floating point registers
- RISCV64 will only include support for 64 bit floating point registers
- RISCV 32/64 context will include a "version" field to account for
  future extensions

Fixed: 1447862

Tested: `make check` on x86 host
Tested: `minidump_stackwalk` for RISCV64 minidump on x86 host
Change-Id: I605d5b2c35e627a5dc986aaf818a9c9898f6ae0b
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/4553281
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
This commit is contained in:
Thomas Gales 2023-05-22 22:51:47 +00:00 committed by Joshua Peraza
parent 8267ac6510
commit 64a53c1904
6 changed files with 72 additions and 117 deletions
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30
src/client/linux/dump_writer_common/thread_info.cc
View file

@ -322,23 +322,19 @@ void ThreadInfo::FillCPUContext(RawContextCPU* out) const {
out->t5 = mcontext.__gregs[30];
out->t6 = mcontext.__gregs[31];
# if __riscv_flen == 32
for(int i = 0; i < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; i++)
out->float_save.regs[i] = mcontext.__fpregs.__f.__f[i];
out->float_save.fpcsr = mcontext.__fpregs.__f.__fcsr;
# elif __riscv_flen == 64
for(int i = 0; i < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; i++)
out->float_save.regs[i] = mcontext.__fpregs.__d.__f[i];
out->float_save.fpcsr = mcontext.__fpregs.__d.__fcsr;
# elif __riscv_flen == 128
for(int i = 0; i < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; i++) {
out->float_save.regs[i].high = mcontext.__fpregs.__q.__f[2*i];
out->float_save.regs[i].low = mcontext.__fpregs.__q.__f[2*i+1];
}
out->float_save.fpcsr = mcontext.__fpregs.__q.__fcsr;
# else
# error "Unexpected __riscv_flen"
# endif
// Breakpad only supports RISCV32 with 32 bit floating point.
// Breakpad only supports RISCV64 with 64 bit floating point.
#if __riscv_xlen == 32
for (int i = 0; i < MD_CONTEXT_RISCV_FPR_COUNT; i++)
out->fpregs[i] = mcontext.__fpregs.__f.__f[i];
out->fcsr = mcontext.__fpregs.__f.__fcsr;
#elif __riscv_xlen == 64
for (int i = 0; i < MD_CONTEXT_RISCV_FPR_COUNT; i++)
out->fpregs[i] = mcontext.__fpregs.__d.__f[i];
out->fcsr = mcontext.__fpregs.__d.__fcsr;
#else
#error "Unexpected __riscv_xlen"
#endif
}
#endif // __riscv

28
src/client/linux/dump_writer_common/ucontext_reader.cc
View file

@ -310,21 +310,19 @@ void UContextReader::FillCPUContext(RawContextCPU* out, const ucontext_t* uc) {
out->t5 = uc->uc_mcontext.__gregs[30];
out->t6 = uc->uc_mcontext.__gregs[31];
# if __riscv_flen == 32
for(int i = 0; i < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; i++)
out->float_save.regs[i] = uc->uc_mcontext.__fpregs.__f.__f[i];
out->float_save.fpcsr = uc->uc_mcontext.__fpregs.__f.__fcsr;
# elif __riscv_flen == 64
for(int i = 0; i < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; i++)
out->float_save.regs[i] = uc->uc_mcontext.__fpregs.__d.__f[i];
out->float_save.fpcsr = uc->uc_mcontext.__fpregs.__d.__fcsr;
# elif __riscv_flen == 128
for(int i = 0; i < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; i++) {
out->float_save.regs[i].high = uc->uc_mcontext.__fpregs.__q.__f[2*i];
out->float_save.regs[i].low = uc->uc_mcontext.__fpregs.__q.__f[2*i+1];
}
out->float_save.fpcsr = uc->uc_mcontext.__fpregs.__q.__fcsr;
# endif
// Breakpad only supports RISCV32 with 32 bit floating point.
// Breakpad only supports RISCV64 with 64 bit floating point.
#if __riscv_xlen == 32
for (int i = 0; i < MD_CONTEXT_RISCV_FPR_COUNT; i++)
out->fpregs[i] = uc->uc_mcontext.__fpregs.__f.__f[i];
out->fcsr = uc->uc_mcontext.__fpregs.__f.__fcsr;
#elif __riscv_xlen == 64
for (int i = 0; i < MD_CONTEXT_RISCV_FPR_COUNT; i++)
out->fpregs[i] = uc->uc_mcontext.__fpregs.__d.__f[i];
out->fcsr = uc->uc_mcontext.__fpregs.__d.__fcsr;
#else
#error "Unexpected __riscv_xlen"
#endif
}
#endif

38
src/google_breakpad/common/minidump_cpu_riscv.h
View file

@ -39,28 +39,8 @@
#include "google_breakpad/common/breakpad_types.h"
#define MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT 32
#if defined(__riscv)
# if __riscv_flen == 32
typedef uint32_t riscv_fpr_size;
# elif __riscv_flen == 64
typedef uint64_t riscv_fpr_size;
# elif __riscv_flen == 128
typedef uint128_struct riscv_fpr_size;
# else
# error "Unexpected __riscv_flen"
# endif
#else
typedef uint32_t riscv_fpr_size;
#endif
#define MD_CONTEXT_RISCV_GPR_COUNT 32
typedef struct {
/* 32 floating point registers, f0 .. f31. */
riscv_fpr_size regs[MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT];
uint32_t fpcsr;
} MDFloatingSaveAreaRISCV;
#define MD_CONTEXT_RISCV_FPR_COUNT 32
enum MDRISCVRegisterNumbers {
MD_CONTEXT_RISCV_REG_PC = 0,
@ -72,13 +52,14 @@ enum MDRISCVRegisterNumbers {
* context stored in the structure. */
#define MD_CONTEXT_RISCV 0x00800000
#define MD_CONTEXT_RISCV_INTEGER (MD_CONTEXT_RISCV | 0x00000001)
#define MD_CONTEXT_RISCV_FLOATING_POINT (MD_CONTEXT_RISCV | 0x00000004)
#define MD_CONTEXT_RISCV_FLOATING_POINT (MD_CONTEXT_RISCV | 0x00000002)
#define MD_CONTEXT_RISCV_FULL (MD_CONTEXT_RISCV_INTEGER | \
MD_CONTEXT_RISCV_FLOATING_POINT)
typedef struct {
/* Determines which fields of this struct are populated */
uint32_t context_flags;
uint32_t version;
uint32_t pc;
uint32_t ra;
@ -113,20 +94,24 @@ typedef struct {
uint32_t t5;
uint32_t t6;
MDFloatingSaveAreaRISCV float_save;
/* 32 floating point registers, f0 .. f31. Breakpad only supports RISCV32
* with 32 bit floating point. */
uint32_t fpregs[MD_CONTEXT_RISCV_FPR_COUNT];
uint32_t fcsr;
} MDRawContextRISCV;
/* For (MDRawContextRISCV64).context_flags. These values indicate the type of
* context stored in the structure. */
#define MD_CONTEXT_RISCV64 0x08000000
#define MD_CONTEXT_RISCV64_INTEGER (MD_CONTEXT_RISCV64 | 0x00000001)
#define MD_CONTEXT_RISCV64_FLOATING_POINT (MD_CONTEXT_RISCV64 | 0x00000004)
#define MD_CONTEXT_RISCV64_FLOATING_POINT (MD_CONTEXT_RISCV64 | 0x00000002)
#define MD_CONTEXT_RISCV64_FULL (MD_CONTEXT_RISCV64_INTEGER | \
MD_CONTEXT_RISCV64_FLOATING_POINT)
typedef struct {
/* Determines which fields of this struct are populated */
uint32_t context_flags;
uint32_t version;
uint64_t pc;
uint64_t ra;
@ -161,7 +146,10 @@ typedef struct {
uint64_t t5;
uint64_t t6;
MDFloatingSaveAreaRISCV float_save;
/* 32 floating point registers, f0 .. f31. Breakpad only supports RISCV64 with
* 64 bit floating point. */
uint64_t fpregs[MD_CONTEXT_RISCV_FPR_COUNT];
uint32_t fcsr;
} MDRawContextRISCV64;

49
src/processor/dump_context.cc
View file

@ -776,24 +776,14 @@ void DumpContext::Print() {
context_riscv->t6);
#if defined(__riscv)
for (unsigned int freg_index = 0;
freg_index < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; ++freg_index) {
riscv_fpr_size fp_value = context_riscv->float_save.regs[freg_index];
# if __riscv_flen == 32
printf(" float_save.regs[%2d] = 0x%" PRIx32 "\n",
freg_index, fp_value);
# elif __riscv_flen == 64
printf(" float_save.regs[%2d] = 0x%" PRIx64 "\n",
freg_index, fp_value);
# elif __riscv_flen == 128
printf(" float_save.regs[%2d] = 0x%" PRIx64 "%" PRIx64 "\n",
freg_index, fp_value.high, fp_value.low);
# else
# error "Unexpected __riscv_flen"
# endif
for (unsigned int freg_index = 0; freg_index < MD_CONTEXT_RISCV_FPR_COUNT;
++freg_index) {
// Breakpad only supports RISCV32 with 32 bit floating point.
uint32_t fp_value = context_riscv->fpregs[freg_index];
printf(" fpregs[%2d] = 0x%" PRIx32 "\n", freg_index,
fp_value);
}
printf(" float_save.fpcsr = 0x%" PRIx32 "\n",
context_riscv->float_save.fpcsr);
printf(" fcsr = 0x%" PRIx32 "\n", context_riscv->fcsr);
#endif
break;
}
@ -870,25 +860,14 @@ void DumpContext::Print() {
context_riscv64->t6);
#if defined(__riscv)
for (unsigned int freg_index = 0;
freg_index < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; ++freg_index) {
riscv_fpr_size fp_value = context_riscv64->float_save.regs[freg_index];
# if __riscv_flen == 32
printf(" float_save.regs[%2d] = 0x%" PRIx32 "\n",
freg_index, fp_value);
# elif __riscv_flen == 64
printf(" float_save.regs[%2d] = 0x%" PRIx64 "\n",
freg_index, fp_value);
# elif __riscv_flen == 128
printf(" float_save.regs[%2d] = 0x%"
PRIx64 "%" PRIx64 "\n",
freg_index, fp_value.high, fp_value.low);
# else
# error "Unexpected __riscv_flen"
# endif
for (unsigned int freg_index = 0; freg_index < MD_CONTEXT_RISCV_FPR_COUNT;
++freg_index) {
// Breakpad only supports RISCV64 with 64 bit floating point.
uint64_t fp_value = context_riscv64->fpregs[freg_index];
printf(" fpregs[%2d] = 0x%" PRIx64 "\n", freg_index,
fp_value);
}
printf(" float_save.fpcsr = 0x%" PRIx32 "\n",
context_riscv64->float_save.fpcsr);
printf(" fcsr = 0x%" PRIx32 "\n", context_riscv64->fcsr);
#endif
break;
}

14
src/processor/minidump.cc
View file

@ -1259,12 +1259,11 @@ bool MinidumpContext::Read(uint32_t expected_size) {
Swap(&context_riscv->t5);
Swap(&context_riscv->t6);
for (int fpr_index = 0;
fpr_index < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT;
for (int fpr_index = 0; fpr_index < MD_CONTEXT_RISCV_FPR_COUNT;
++fpr_index) {
Swap(&context_riscv->float_save.regs[fpr_index]);
Swap(&context_riscv->fpregs[fpr_index]);
}
Swap(&context_riscv->float_save.fpcsr);
Swap(&context_riscv->fcsr);
}
SetContextRISCV(context_riscv.release());
@ -1338,12 +1337,11 @@ bool MinidumpContext::Read(uint32_t expected_size) {
Swap(&context_riscv64->t5);
Swap(&context_riscv64->t6);
for (int fpr_index = 0;
fpr_index < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT;
for (int fpr_index = 0; fpr_index < MD_CONTEXT_RISCV_FPR_COUNT;
++fpr_index) {
Swap(&context_riscv64->float_save.regs[fpr_index]);
Swap(&context_riscv64->fpregs[fpr_index]);
}
Swap(&context_riscv64->float_save.fpcsr);
Swap(&context_riscv64->fcsr);
}
SetContextRISCV64(context_riscv64.release());

30
src/tools/linux/md2core/minidump-2-core.cc
View file

@ -583,25 +583,21 @@ ParseThreadRegisters(CrashedProcess::Thread* thread,
thread->mcontext.__gregs[30] = rawregs->t5;
thread->mcontext.__gregs[31] = rawregs->t6;
# if __riscv_flen == 32
for (int i = 0; i < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; ++i) {
thread->mcontext.__fpregs.__f.__f[i] = rawregs->float_save.regs[i];
// Breakpad only supports RISCV32 with 32 bit floating point.
// Breakpad only supports RISCV64 with 64 bit floating point.
#if __riscv_xlen == 32
for (int i = 0; i < MD_CONTEXT_RISCV_FPR_COUNT; ++i) {
thread->mcontext.__fpregs.__f.__f[i] = rawregs->fpregs[i];
}
thread->mcontext.__fpregs.__f.__fcsr = rawregs->float_save.fpcsr;
# elif __riscv_flen == 64
for (int i = 0; i < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; ++i) {
thread->mcontext.__fpregs.__d.__f[i] = rawregs->float_save.regs[i];
thread->mcontext.__fpregs.__f.__fcsr = rawregs->fcsr;
#elif __riscv_xlen == 64
for (int i = 0; i < MD_CONTEXT_RISCV_FPR_COUNT; ++i) {
thread->mcontext.__fpregs.__d.__f[i] = rawregs->fpregs[i];
}
thread->mcontext.__fpregs.__d.__fcsr = rawregs->float_save.fpcsr;
# elif __riscv_flen == 128
for (int i = 0; i < MD_FLOATINGSAVEAREA_RISCV_FPR_COUNT; ++i) {
thread->mcontext.__fpregs.__q.__f[2*i] = rawregs->float_save.regs[i].high;
thread->mcontext.__fpregs.__q.__f[2*i+1] = rawregs->float_save.regs[i].low;
}
thread->mcontext.__fpregs.__q.__fcsr = rawregs->float_save.fpcsr;
# else
# error "Unexpected __riscv_flen"
# endif
thread->mcontext.__fpregs.__d.__fcsr = rawregs->fcsr;
#else
#error "Unexpected __riscv_xlen"
#endif
}
#else
#error "This code has not been ported to your platform yet"